Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5
Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/github.com/jessevdk/go-flags/.travis.yml b/vendor/github.com/jessevdk/go-flags/.travis.yml
new file mode 100644
index 0000000..0f0728d
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/.travis.yml
@@ -0,0 +1,44 @@
+language: go
+
+os:
+ - linux
+ - osx
+
+go:
+ - 1.x
+ - 1.7.x
+ - 1.8.x
+ - 1.9.x
+ - 1.10.x
+
+install:
+ # go-flags
+ - go get -d -v ./...
+ - go build -v ./...
+
+ # linting
+ - go get github.com/golang/lint/golint
+
+ # code coverage
+ - go get golang.org/x/tools/cmd/cover
+ - go get github.com/onsi/ginkgo/ginkgo
+ - go get github.com/modocache/gover
+ - if [ "$TRAVIS_SECURE_ENV_VARS" = "true" ]; then go get github.com/mattn/goveralls; fi
+
+script:
+ # go-flags
+ - $(exit $(gofmt -l . | wc -l))
+ - go test -v ./...
+
+ # linting
+ - go tool vet -all=true -v=true . || true
+ - $(go env GOPATH | awk 'BEGIN{FS=":"} {print $1}')/bin/golint ./...
+
+ # code coverage
+ - $(go env GOPATH | awk 'BEGIN{FS=":"} {print $1}')/bin/ginkgo -r -cover
+ - $(go env GOPATH | awk 'BEGIN{FS=":"} {print $1}')/bin/gover
+ - if [ "$TRAVIS_SECURE_ENV_VARS" = "true" ]; then $(go env GOPATH | awk 'BEGIN{FS=":"} {print $1}')/bin/goveralls -coverprofile=gover.coverprofile -service=travis-ci -repotoken $COVERALLS_TOKEN; fi
+
+env:
+ # coveralls.io
+ secure: "RCYbiB4P0RjQRIoUx/vG/AjP3mmYCbzOmr86DCww1Z88yNcy3hYr3Cq8rpPtYU5v0g7wTpu4adaKIcqRE9xknYGbqj3YWZiCoBP1/n4Z+9sHW3Dsd9D/GRGeHUus0laJUGARjWoCTvoEtOgTdGQDoX7mH+pUUY0FBltNYUdOiiU="
diff --git a/vendor/github.com/jessevdk/go-flags/LICENSE b/vendor/github.com/jessevdk/go-flags/LICENSE
new file mode 100644
index 0000000..bcca0d5
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/LICENSE
@@ -0,0 +1,26 @@
+Copyright (c) 2012 Jesse van den Kieboom. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+ * Neither the name of Google Inc. nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/github.com/jessevdk/go-flags/README.md b/vendor/github.com/jessevdk/go-flags/README.md
new file mode 100644
index 0000000..3b02394
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/README.md
@@ -0,0 +1,134 @@
+go-flags: a go library for parsing command line arguments
+=========================================================
+
+[](https://godoc.org/github.com/jessevdk/go-flags) [](https://travis-ci.org/jessevdk/go-flags) [](https://coveralls.io/r/jessevdk/go-flags?branch=master)
+
+This library provides similar functionality to the builtin flag library of
+go, but provides much more functionality and nicer formatting. From the
+documentation:
+
+Package flags provides an extensive command line option parser.
+The flags package is similar in functionality to the go builtin flag package
+but provides more options and uses reflection to provide a convenient and
+succinct way of specifying command line options.
+
+Supported features:
+* Options with short names (-v)
+* Options with long names (--verbose)
+* Options with and without arguments (bool v.s. other type)
+* Options with optional arguments and default values
+* Multiple option groups each containing a set of options
+* Generate and print well-formatted help message
+* Passing remaining command line arguments after -- (optional)
+* Ignoring unknown command line options (optional)
+* Supports -I/usr/include -I=/usr/include -I /usr/include option argument specification
+* Supports multiple short options -aux
+* Supports all primitive go types (string, int{8..64}, uint{8..64}, float)
+* Supports same option multiple times (can store in slice or last option counts)
+* Supports maps
+* Supports function callbacks
+* Supports namespaces for (nested) option groups
+
+The flags package uses structs, reflection and struct field tags
+to allow users to specify command line options. This results in very simple
+and concise specification of your application options. For example:
+
+```go
+type Options struct {
+ Verbose []bool `short:"v" long:"verbose" description:"Show verbose debug information"`
+}
+```
+
+This specifies one option with a short name -v and a long name --verbose.
+When either -v or --verbose is found on the command line, a 'true' value
+will be appended to the Verbose field. e.g. when specifying -vvv, the
+resulting value of Verbose will be {[true, true, true]}.
+
+Example:
+--------
+```go
+var opts struct {
+ // Slice of bool will append 'true' each time the option
+ // is encountered (can be set multiple times, like -vvv)
+ Verbose []bool `short:"v" long:"verbose" description:"Show verbose debug information"`
+
+ // Example of automatic marshalling to desired type (uint)
+ Offset uint `long:"offset" description:"Offset"`
+
+ // Example of a callback, called each time the option is found.
+ Call func(string) `short:"c" description:"Call phone number"`
+
+ // Example of a required flag
+ Name string `short:"n" long:"name" description:"A name" required:"true"`
+
+ // Example of a value name
+ File string `short:"f" long:"file" description:"A file" value-name:"FILE"`
+
+ // Example of a pointer
+ Ptr *int `short:"p" description:"A pointer to an integer"`
+
+ // Example of a slice of strings
+ StringSlice []string `short:"s" description:"A slice of strings"`
+
+ // Example of a slice of pointers
+ PtrSlice []*string `long:"ptrslice" description:"A slice of pointers to string"`
+
+ // Example of a map
+ IntMap map[string]int `long:"intmap" description:"A map from string to int"`
+}
+
+// Callback which will invoke callto:<argument> to call a number.
+// Note that this works just on OS X (and probably only with
+// Skype) but it shows the idea.
+opts.Call = func(num string) {
+ cmd := exec.Command("open", "callto:"+num)
+ cmd.Start()
+ cmd.Process.Release()
+}
+
+// Make some fake arguments to parse.
+args := []string{
+ "-vv",
+ "--offset=5",
+ "-n", "Me",
+ "-p", "3",
+ "-s", "hello",
+ "-s", "world",
+ "--ptrslice", "hello",
+ "--ptrslice", "world",
+ "--intmap", "a:1",
+ "--intmap", "b:5",
+ "arg1",
+ "arg2",
+ "arg3",
+}
+
+// Parse flags from `args'. Note that here we use flags.ParseArgs for
+// the sake of making a working example. Normally, you would simply use
+// flags.Parse(&opts) which uses os.Args
+args, err := flags.ParseArgs(&opts, args)
+
+if err != nil {
+ panic(err)
+}
+
+fmt.Printf("Verbosity: %v\n", opts.Verbose)
+fmt.Printf("Offset: %d\n", opts.Offset)
+fmt.Printf("Name: %s\n", opts.Name)
+fmt.Printf("Ptr: %d\n", *opts.Ptr)
+fmt.Printf("StringSlice: %v\n", opts.StringSlice)
+fmt.Printf("PtrSlice: [%v %v]\n", *opts.PtrSlice[0], *opts.PtrSlice[1])
+fmt.Printf("IntMap: [a:%v b:%v]\n", opts.IntMap["a"], opts.IntMap["b"])
+fmt.Printf("Remaining args: %s\n", strings.Join(args, " "))
+
+// Output: Verbosity: [true true]
+// Offset: 5
+// Name: Me
+// Ptr: 3
+// StringSlice: [hello world]
+// PtrSlice: [hello world]
+// IntMap: [a:1 b:5]
+// Remaining args: arg1 arg2 arg3
+```
+
+More information can be found in the godocs: <http://godoc.org/github.com/jessevdk/go-flags>
diff --git a/vendor/github.com/jessevdk/go-flags/arg.go b/vendor/github.com/jessevdk/go-flags/arg.go
new file mode 100644
index 0000000..8ec6204
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/arg.go
@@ -0,0 +1,27 @@
+package flags
+
+import (
+ "reflect"
+)
+
+// Arg represents a positional argument on the command line.
+type Arg struct {
+ // The name of the positional argument (used in the help)
+ Name string
+
+ // A description of the positional argument (used in the help)
+ Description string
+
+ // The minimal number of required positional arguments
+ Required int
+
+ // The maximum number of required positional arguments
+ RequiredMaximum int
+
+ value reflect.Value
+ tag multiTag
+}
+
+func (a *Arg) isRemaining() bool {
+ return a.value.Type().Kind() == reflect.Slice
+}
diff --git a/vendor/github.com/jessevdk/go-flags/check_crosscompile.sh b/vendor/github.com/jessevdk/go-flags/check_crosscompile.sh
new file mode 100755
index 0000000..c494f61
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/check_crosscompile.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -e
+
+echo '# linux arm7'
+GOARM=7 GOARCH=arm GOOS=linux go build
+echo '# linux arm5'
+GOARM=5 GOARCH=arm GOOS=linux go build
+echo '# windows 386'
+GOARCH=386 GOOS=windows go build
+echo '# windows amd64'
+GOARCH=amd64 GOOS=windows go build
+echo '# darwin'
+GOARCH=amd64 GOOS=darwin go build
+echo '# freebsd'
+GOARCH=amd64 GOOS=freebsd go build
diff --git a/vendor/github.com/jessevdk/go-flags/closest.go b/vendor/github.com/jessevdk/go-flags/closest.go
new file mode 100644
index 0000000..3b51875
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/closest.go
@@ -0,0 +1,59 @@
+package flags
+
+func levenshtein(s string, t string) int {
+ if len(s) == 0 {
+ return len(t)
+ }
+
+ if len(t) == 0 {
+ return len(s)
+ }
+
+ dists := make([][]int, len(s)+1)
+ for i := range dists {
+ dists[i] = make([]int, len(t)+1)
+ dists[i][0] = i
+ }
+
+ for j := range t {
+ dists[0][j] = j
+ }
+
+ for i, sc := range s {
+ for j, tc := range t {
+ if sc == tc {
+ dists[i+1][j+1] = dists[i][j]
+ } else {
+ dists[i+1][j+1] = dists[i][j] + 1
+ if dists[i+1][j] < dists[i+1][j+1] {
+ dists[i+1][j+1] = dists[i+1][j] + 1
+ }
+ if dists[i][j+1] < dists[i+1][j+1] {
+ dists[i+1][j+1] = dists[i][j+1] + 1
+ }
+ }
+ }
+ }
+
+ return dists[len(s)][len(t)]
+}
+
+func closestChoice(cmd string, choices []string) (string, int) {
+ if len(choices) == 0 {
+ return "", 0
+ }
+
+ mincmd := -1
+ mindist := -1
+
+ for i, c := range choices {
+ l := levenshtein(cmd, c)
+
+ if mincmd < 0 || l < mindist {
+ mindist = l
+ mincmd = i
+ }
+ }
+
+ return choices[mincmd], mindist
+}
diff --git a/vendor/github.com/jessevdk/go-flags/command.go b/vendor/github.com/jessevdk/go-flags/command.go
new file mode 100644
index 0000000..486bacb
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/command.go
@@ -0,0 +1,465 @@
+package flags
+
+import (
+ "reflect"
+ "sort"
+ "strconv"
+ "strings"
+)
+
+// Command represents an application command. Commands can be added to the
+// parser (which itself is a command) and are selected/executed when its name
+// is specified on the command line. The Command type embeds a Group and
+// therefore also carries a set of command specific options.
+type Command struct {
+ // Embedded, see Group for more information
+ *Group
+
+ // The name by which the command can be invoked
+ Name string
+
+ // The active sub command (set by parsing) or nil
+ Active *Command
+
+ // Whether subcommands are optional
+ SubcommandsOptional bool
+
+ // Aliases for the command
+ Aliases []string
+
+ // Whether positional arguments are required
+ ArgsRequired bool
+
+ commands []*Command
+ hasBuiltinHelpGroup bool
+ args []*Arg
+}
+
+// Commander is an interface which can be implemented by any command added in
+// the options. When implemented, the Execute method will be called for the last
+// specified (sub)command providing the remaining command line arguments.
+type Commander interface {
+ // Execute will be called for the last active (sub)command. The
+ // args argument contains the remaining command line arguments. The
+ // error that Execute returns will be eventually passed out of the
+ // Parse method of the Parser.
+ Execute(args []string) error
+}
+
+// Usage is an interface which can be implemented to show a custom usage string
+// in the help message shown for a command.
+type Usage interface {
+ // Usage is called for commands to allow customized printing of command
+ // usage in the generated help message.
+ Usage() string
+}
+
+type lookup struct {
+ shortNames map[string]*Option
+ longNames map[string]*Option
+
+ commands map[string]*Command
+}
+
+// AddCommand adds a new command to the parser with the given name and data. The
+// data needs to be a pointer to a struct from which the fields indicate which
+// options are in the command. The provided data can implement the Command and
+// Usage interfaces.
+func (c *Command) AddCommand(command string, shortDescription string, longDescription string, data interface{}) (*Command, error) {
+ cmd := newCommand(command, shortDescription, longDescription, data)
+
+ cmd.parent = c
+
+ if err := cmd.scan(); err != nil {
+ return nil, err
+ }
+
+ c.commands = append(c.commands, cmd)
+ return cmd, nil
+}
+
+// AddGroup adds a new group to the command with the given name and data. The
+// data needs to be a pointer to a struct from which the fields indicate which
+// options are in the group.
+func (c *Command) AddGroup(shortDescription string, longDescription string, data interface{}) (*Group, error) {
+ group := newGroup(shortDescription, longDescription, data)
+
+ group.parent = c
+
+ if err := group.scanType(c.scanSubcommandHandler(group)); err != nil {
+ return nil, err
+ }
+
+ c.groups = append(c.groups, group)
+ return group, nil
+}
+
+// Commands returns a list of subcommands of this command.
+func (c *Command) Commands() []*Command {
+ return c.commands
+}
+
+// Find locates the subcommand with the given name and returns it. If no such
+// command can be found Find will return nil.
+func (c *Command) Find(name string) *Command {
+ for _, cc := range c.commands {
+ if cc.match(name) {
+ return cc
+ }
+ }
+
+ return nil
+}
+
+// FindOptionByLongName finds an option that is part of the command, or any of
+// its parent commands, by matching its long name (including the option
+// namespace).
+func (c *Command) FindOptionByLongName(longName string) (option *Option) {
+ for option == nil && c != nil {
+ option = c.Group.FindOptionByLongName(longName)
+
+ c, _ = c.parent.(*Command)
+ }
+
+ return option
+}
+
+// FindOptionByShortName finds an option that is part of the command, or any of
+// its parent commands, by matching its long name (including the option
+// namespace).
+func (c *Command) FindOptionByShortName(shortName rune) (option *Option) {
+ for option == nil && c != nil {
+ option = c.Group.FindOptionByShortName(shortName)
+
+ c, _ = c.parent.(*Command)
+ }
+
+ return option
+}
+
+// Args returns a list of positional arguments associated with this command.
+func (c *Command) Args() []*Arg {
+ ret := make([]*Arg, len(c.args))
+ copy(ret, c.args)
+
+ return ret
+}
+
+func newCommand(name string, shortDescription string, longDescription string, data interface{}) *Command {
+ return &Command{
+ Group: newGroup(shortDescription, longDescription, data),
+ Name: name,
+ }
+}
+
+func (c *Command) scanSubcommandHandler(parentg *Group) scanHandler {
+ f := func(realval reflect.Value, sfield *reflect.StructField) (bool, error) {
+ mtag := newMultiTag(string(sfield.Tag))
+
+ if err := mtag.Parse(); err != nil {
+ return true, err
+ }
+
+ positional := mtag.Get("positional-args")
+
+ if len(positional) != 0 {
+ stype := realval.Type()
+
+ for i := 0; i < stype.NumField(); i++ {
+ field := stype.Field(i)
+
+ m := newMultiTag((string(field.Tag)))
+
+ if err := m.Parse(); err != nil {
+ return true, err
+ }
+
+ name := m.Get("positional-arg-name")
+
+ if len(name) == 0 {
+ name = field.Name
+ }
+
+ required := -1
+ requiredMaximum := -1
+
+ sreq := m.Get("required")
+
+ if sreq != "" {
+ required = 1
+
+ rng := strings.SplitN(sreq, "-", 2)
+
+ if len(rng) > 1 {
+ if preq, err := strconv.ParseInt(rng[0], 10, 32); err == nil {
+ required = int(preq)
+ }
+
+ if preq, err := strconv.ParseInt(rng[1], 10, 32); err == nil {
+ requiredMaximum = int(preq)
+ }
+ } else {
+ if preq, err := strconv.ParseInt(sreq, 10, 32); err == nil {
+ required = int(preq)
+ }
+ }
+ }
+
+ arg := &Arg{
+ Name: name,
+ Description: m.Get("description"),
+ Required: required,
+ RequiredMaximum: requiredMaximum,
+
+ value: realval.Field(i),
+ tag: m,
+ }
+
+ c.args = append(c.args, arg)
+
+ if len(mtag.Get("required")) != 0 {
+ c.ArgsRequired = true
+ }
+ }
+
+ return true, nil
+ }
+
+ subcommand := mtag.Get("command")
+
+ if len(subcommand) != 0 {
+ var ptrval reflect.Value
+
+ if realval.Kind() == reflect.Ptr {
+ ptrval = realval
+
+ if ptrval.IsNil() {
+ ptrval.Set(reflect.New(ptrval.Type().Elem()))
+ }
+ } else {
+ ptrval = realval.Addr()
+ }
+
+ shortDescription := mtag.Get("description")
+ longDescription := mtag.Get("long-description")
+ subcommandsOptional := mtag.Get("subcommands-optional")
+ aliases := mtag.GetMany("alias")
+
+ subc, err := c.AddCommand(subcommand, shortDescription, longDescription, ptrval.Interface())
+
+ if err != nil {
+ return true, err
+ }
+
+ subc.Hidden = mtag.Get("hidden") != ""
+
+ if len(subcommandsOptional) > 0 {
+ subc.SubcommandsOptional = true
+ }
+
+ if len(aliases) > 0 {
+ subc.Aliases = aliases
+ }
+
+ return true, nil
+ }
+
+ return parentg.scanSubGroupHandler(realval, sfield)
+ }
+
+ return f
+}
+
+func (c *Command) scan() error {
+ return c.scanType(c.scanSubcommandHandler(c.Group))
+}
+
+func (c *Command) eachOption(f func(*Command, *Group, *Option)) {
+ c.eachCommand(func(c *Command) {
+ c.eachGroup(func(g *Group) {
+ for _, option := range g.options {
+ f(c, g, option)
+ }
+ })
+ }, true)
+}
+
+func (c *Command) eachCommand(f func(*Command), recurse bool) {
+ f(c)
+
+ for _, cc := range c.commands {
+ if recurse {
+ cc.eachCommand(f, true)
+ } else {
+ f(cc)
+ }
+ }
+}
+
+func (c *Command) eachActiveGroup(f func(cc *Command, g *Group)) {
+ c.eachGroup(func(g *Group) {
+ f(c, g)
+ })
+
+ if c.Active != nil {
+ c.Active.eachActiveGroup(f)
+ }
+}
+
+func (c *Command) addHelpGroups(showHelp func() error) {
+ if !c.hasBuiltinHelpGroup {
+ c.addHelpGroup(showHelp)
+ c.hasBuiltinHelpGroup = true
+ }
+
+ for _, cc := range c.commands {
+ cc.addHelpGroups(showHelp)
+ }
+}
+
+func (c *Command) makeLookup() lookup {
+ ret := lookup{
+ shortNames: make(map[string]*Option),
+ longNames: make(map[string]*Option),
+ commands: make(map[string]*Command),
+ }
+
+ parent := c.parent
+
+ var parents []*Command
+
+ for parent != nil {
+ if cmd, ok := parent.(*Command); ok {
+ parents = append(parents, cmd)
+ parent = cmd.parent
+ } else {
+ parent = nil
+ }
+ }
+
+ for i := len(parents) - 1; i >= 0; i-- {
+ parents[i].fillLookup(&ret, true)
+ }
+
+ c.fillLookup(&ret, false)
+ return ret
+}
+
+func (c *Command) fillLookup(ret *lookup, onlyOptions bool) {
+ c.eachGroup(func(g *Group) {
+ for _, option := range g.options {
+ if option.ShortName != 0 {
+ ret.shortNames[string(option.ShortName)] = option
+ }
+
+ if len(option.LongName) > 0 {
+ ret.longNames[option.LongNameWithNamespace()] = option
+ }
+ }
+ })
+
+ if onlyOptions {
+ return
+ }
+
+ for _, subcommand := range c.commands {
+ ret.commands[subcommand.Name] = subcommand
+
+ for _, a := range subcommand.Aliases {
+ ret.commands[a] = subcommand
+ }
+ }
+}
+
+func (c *Command) groupByName(name string) *Group {
+ if grp := c.Group.groupByName(name); grp != nil {
+ return grp
+ }
+
+ for _, subc := range c.commands {
+ prefix := subc.Name + "."
+
+ if strings.HasPrefix(name, prefix) {
+ if grp := subc.groupByName(name[len(prefix):]); grp != nil {
+ return grp
+ }
+ } else if name == subc.Name {
+ return subc.Group
+ }
+ }
+
+ return nil
+}
+
+type commandList []*Command
+
+func (c commandList) Less(i, j int) bool {
+ return c[i].Name < c[j].Name
+}
+
+func (c commandList) Len() int {
+ return len(c)
+}
+
+func (c commandList) Swap(i, j int) {
+ c[i], c[j] = c[j], c[i]
+}
+
+func (c *Command) sortedVisibleCommands() []*Command {
+ ret := commandList(c.visibleCommands())
+ sort.Sort(ret)
+
+ return []*Command(ret)
+}
+
+func (c *Command) visibleCommands() []*Command {
+ ret := make([]*Command, 0, len(c.commands))
+
+ for _, cmd := range c.commands {
+ if !cmd.Hidden {
+ ret = append(ret, cmd)
+ }
+ }
+
+ return ret
+}
+
+func (c *Command) match(name string) bool {
+ if c.Name == name {
+ return true
+ }
+
+ for _, v := range c.Aliases {
+ if v == name {
+ return true
+ }
+ }
+
+ return false
+}
+
+func (c *Command) hasCliOptions() bool {
+ ret := false
+
+ c.eachGroup(func(g *Group) {
+ if g.isBuiltinHelp {
+ return
+ }
+
+ for _, opt := range g.options {
+ if opt.canCli() {
+ ret = true
+ }
+ }
+ })
+
+ return ret
+}
+
+func (c *Command) fillParseState(s *parseState) {
+ s.positional = make([]*Arg, len(c.args))
+ copy(s.positional, c.args)
+
+ s.lookup = c.makeLookup()
+ s.command = c
+}
diff --git a/vendor/github.com/jessevdk/go-flags/completion.go b/vendor/github.com/jessevdk/go-flags/completion.go
new file mode 100644
index 0000000..7a7a08b
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/completion.go
@@ -0,0 +1,309 @@
+package flags
+
+import (
+ "fmt"
+ "path/filepath"
+ "reflect"
+ "sort"
+ "strings"
+ "unicode/utf8"
+)
+
+// Completion is a type containing information of a completion.
+type Completion struct {
+ // The completed item
+ Item string
+
+ // A description of the completed item (optional)
+ Description string
+}
+
+type completions []Completion
+
+func (c completions) Len() int {
+ return len(c)
+}
+
+func (c completions) Less(i, j int) bool {
+ return c[i].Item < c[j].Item
+}
+
+func (c completions) Swap(i, j int) {
+ c[i], c[j] = c[j], c[i]
+}
+
+// Completer is an interface which can be implemented by types
+// to provide custom command line argument completion.
+type Completer interface {
+ // Complete receives a prefix representing a (partial) value
+ // for its type and should provide a list of possible valid
+ // completions.
+ Complete(match string) []Completion
+}
+
+type completion struct {
+ parser *Parser
+}
+
+// Filename is a string alias which provides filename completion.
+type Filename string
+
+func completionsWithoutDescriptions(items []string) []Completion {
+ ret := make([]Completion, len(items))
+
+ for i, v := range items {
+ ret[i].Item = v
+ }
+
+ return ret
+}
+
+// Complete returns a list of existing files with the given
+// prefix.
+func (f *Filename) Complete(match string) []Completion {
+ ret, _ := filepath.Glob(match + "*")
+ return completionsWithoutDescriptions(ret)
+}
+
+func (c *completion) skipPositional(s *parseState, n int) {
+ if n >= len(s.positional) {
+ s.positional = nil
+ } else {
+ s.positional = s.positional[n:]
+ }
+}
+
+func (c *completion) completeOptionNames(s *parseState, prefix string, match string, short bool) []Completion {
+ if short && len(match) != 0 {
+ return []Completion{
+ Completion{
+ Item: prefix + match,
+ },
+ }
+ }
+
+ var results []Completion
+ repeats := map[string]bool{}
+
+ for name, opt := range s.lookup.longNames {
+ if strings.HasPrefix(name, match) && !opt.Hidden {
+ results = append(results, Completion{
+ Item: defaultLongOptDelimiter + name,
+ Description: opt.Description,
+ })
+
+ if short {
+ repeats[string(opt.ShortName)] = true
+ }
+ }
+ }
+
+ if short {
+ for name, opt := range s.lookup.shortNames {
+ if _, exist := repeats[name]; !exist && strings.HasPrefix(name, match) && !opt.Hidden {
+ results = append(results, Completion{
+ Item: string(defaultShortOptDelimiter) + name,
+ Description: opt.Description,
+ })
+ }
+ }
+ }
+
+ return results
+}
+
+func (c *completion) completeNamesForLongPrefix(s *parseState, prefix string, match string) []Completion {
+ return c.completeOptionNames(s, prefix, match, false)
+}
+
+func (c *completion) completeNamesForShortPrefix(s *parseState, prefix string, match string) []Completion {
+ return c.completeOptionNames(s, prefix, match, true)
+}
+
+func (c *completion) completeCommands(s *parseState, match string) []Completion {
+ n := make([]Completion, 0, len(s.command.commands))
+
+ for _, cmd := range s.command.commands {
+ if cmd.data != c && strings.HasPrefix(cmd.Name, match) {
+ n = append(n, Completion{
+ Item: cmd.Name,
+ Description: cmd.ShortDescription,
+ })
+ }
+ }
+
+ return n
+}
+
+func (c *completion) completeValue(value reflect.Value, prefix string, match string) []Completion {
+ if value.Kind() == reflect.Slice {
+ value = reflect.New(value.Type().Elem())
+ }
+ i := value.Interface()
+
+ var ret []Completion
+
+ if cmp, ok := i.(Completer); ok {
+ ret = cmp.Complete(match)
+ } else if value.CanAddr() {
+ if cmp, ok = value.Addr().Interface().(Completer); ok {
+ ret = cmp.Complete(match)
+ }
+ }
+
+ for i, v := range ret {
+ ret[i].Item = prefix + v.Item
+ }
+
+ return ret
+}
+
+func (c *completion) complete(args []string) []Completion {
+ if len(args) == 0 {
+ args = []string{""}
+ }
+
+ s := &parseState{
+ args: args,
+ }
+
+ c.parser.fillParseState(s)
+
+ var opt *Option
+
+ for len(s.args) > 1 {
+ arg := s.pop()
+
+ if (c.parser.Options&PassDoubleDash) != None && arg == "--" {
+ opt = nil
+ c.skipPositional(s, len(s.args)-1)
+
+ break
+ }
+
+ if argumentIsOption(arg) {
+ prefix, optname, islong := stripOptionPrefix(arg)
+ optname, _, argument := splitOption(prefix, optname, islong)
+
+ if argument == nil {
+ var o *Option
+ canarg := true
+
+ if islong {
+ o = s.lookup.longNames[optname]
+ } else {
+ for i, r := range optname {
+ sname := string(r)
+ o = s.lookup.shortNames[sname]
+
+ if o == nil {
+ break
+ }
+
+ if i == 0 && o.canArgument() && len(optname) != len(sname) {
+ canarg = false
+ break
+ }
+ }
+ }
+
+ if o == nil && (c.parser.Options&PassAfterNonOption) != None {
+ opt = nil
+ c.skipPositional(s, len(s.args)-1)
+
+ break
+ } else if o != nil && o.canArgument() && !o.OptionalArgument && canarg {
+ if len(s.args) > 1 {
+ s.pop()
+ } else {
+ opt = o
+ }
+ }
+ }
+ } else {
+ if len(s.positional) > 0 {
+ if !s.positional[0].isRemaining() {
+ // Don't advance beyond a remaining positional arg (because
+ // it consumes all subsequent args).
+ s.positional = s.positional[1:]
+ }
+ } else if cmd, ok := s.lookup.commands[arg]; ok {
+ cmd.fillParseState(s)
+ }
+
+ opt = nil
+ }
+ }
+
+ lastarg := s.args[len(s.args)-1]
+ var ret []Completion
+
+ if opt != nil {
+ // Completion for the argument of 'opt'
+ ret = c.completeValue(opt.value, "", lastarg)
+ } else if argumentStartsOption(lastarg) {
+ // Complete the option
+ prefix, optname, islong := stripOptionPrefix(lastarg)
+ optname, split, argument := splitOption(prefix, optname, islong)
+
+ if argument == nil && !islong {
+ rname, n := utf8.DecodeRuneInString(optname)
+ sname := string(rname)
+
+ if opt := s.lookup.shortNames[sname]; opt != nil && opt.canArgument() {
+ ret = c.completeValue(opt.value, prefix+sname, optname[n:])
+ } else {
+ ret = c.completeNamesForShortPrefix(s, prefix, optname)
+ }
+ } else if argument != nil {
+ if islong {
+ opt = s.lookup.longNames[optname]
+ } else {
+ opt = s.lookup.shortNames[optname]
+ }
+
+ if opt != nil {
+ ret = c.completeValue(opt.value, prefix+optname+split, *argument)
+ }
+ } else if islong {
+ ret = c.completeNamesForLongPrefix(s, prefix, optname)
+ } else {
+ ret = c.completeNamesForShortPrefix(s, prefix, optname)
+ }
+ } else if len(s.positional) > 0 {
+ // Complete for positional argument
+ ret = c.completeValue(s.positional[0].value, "", lastarg)
+ } else if len(s.command.commands) > 0 {
+ // Complete for command
+ ret = c.completeCommands(s, lastarg)
+ }
+
+ sort.Sort(completions(ret))
+ return ret
+}
+
+func (c *completion) print(items []Completion, showDescriptions bool) {
+ if showDescriptions && len(items) > 1 {
+ maxl := 0
+
+ for _, v := range items {
+ if len(v.Item) > maxl {
+ maxl = len(v.Item)
+ }
+ }
+
+ for _, v := range items {
+ fmt.Printf("%s", v.Item)
+
+ if len(v.Description) > 0 {
+ fmt.Printf("%s # %s", strings.Repeat(" ", maxl-len(v.Item)), v.Description)
+ }
+
+ fmt.Printf("\n")
+ }
+ } else {
+ for _, v := range items {
+ fmt.Println(v.Item)
+ }
+ }
+}
diff --git a/vendor/github.com/jessevdk/go-flags/convert.go b/vendor/github.com/jessevdk/go-flags/convert.go
new file mode 100644
index 0000000..984aac8
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/convert.go
@@ -0,0 +1,348 @@
+// Copyright 2012 Jesse van den Kieboom. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package flags
+
+import (
+ "fmt"
+ "reflect"
+ "strconv"
+ "strings"
+ "time"
+)
+
+// Marshaler is the interface implemented by types that can marshal themselves
+// to a string representation of the flag.
+type Marshaler interface {
+ // MarshalFlag marshals a flag value to its string representation.
+ MarshalFlag() (string, error)
+}
+
+// Unmarshaler is the interface implemented by types that can unmarshal a flag
+// argument to themselves. The provided value is directly passed from the
+// command line.
+type Unmarshaler interface {
+ // UnmarshalFlag unmarshals a string value representation to the flag
+ // value (which therefore needs to be a pointer receiver).
+ UnmarshalFlag(value string) error
+}
+
+func getBase(options multiTag, base int) (int, error) {
+ sbase := options.Get("base")
+
+ var err error
+ var ivbase int64
+
+ if sbase != "" {
+ ivbase, err = strconv.ParseInt(sbase, 10, 32)
+ base = int(ivbase)
+ }
+
+ return base, err
+}
+
+func convertMarshal(val reflect.Value) (bool, string, error) {
+ // Check first for the Marshaler interface
+ if val.Type().NumMethod() > 0 && val.CanInterface() {
+ if marshaler, ok := val.Interface().(Marshaler); ok {
+ ret, err := marshaler.MarshalFlag()
+ return true, ret, err
+ }
+ }
+
+ return false, "", nil
+}
+
+func convertToString(val reflect.Value, options multiTag) (string, error) {
+ if ok, ret, err := convertMarshal(val); ok {
+ return ret, err
+ }
+
+ tp := val.Type()
+
+ // Support for time.Duration
+ if tp == reflect.TypeOf((*time.Duration)(nil)).Elem() {
+ stringer := val.Interface().(fmt.Stringer)
+ return stringer.String(), nil
+ }
+
+ switch tp.Kind() {
+ case reflect.String:
+ return val.String(), nil
+ case reflect.Bool:
+ if val.Bool() {
+ return "true", nil
+ }
+
+ return "false", nil
+ case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+ base, err := getBase(options, 10)
+
+ if err != nil {
+ return "", err
+ }
+
+ return strconv.FormatInt(val.Int(), base), nil
+ case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+ base, err := getBase(options, 10)
+
+ if err != nil {
+ return "", err
+ }
+
+ return strconv.FormatUint(val.Uint(), base), nil
+ case reflect.Float32, reflect.Float64:
+ return strconv.FormatFloat(val.Float(), 'g', -1, tp.Bits()), nil
+ case reflect.Slice:
+ if val.Len() == 0 {
+ return "", nil
+ }
+
+ ret := "["
+
+ for i := 0; i < val.Len(); i++ {
+ if i != 0 {
+ ret += ", "
+ }
+
+ item, err := convertToString(val.Index(i), options)
+
+ if err != nil {
+ return "", err
+ }
+
+ ret += item
+ }
+
+ return ret + "]", nil
+ case reflect.Map:
+ ret := "{"
+
+ for i, key := range val.MapKeys() {
+ if i != 0 {
+ ret += ", "
+ }
+
+ keyitem, err := convertToString(key, options)
+
+ if err != nil {
+ return "", err
+ }
+
+ item, err := convertToString(val.MapIndex(key), options)
+
+ if err != nil {
+ return "", err
+ }
+
+ ret += keyitem + ":" + item
+ }
+
+ return ret + "}", nil
+ case reflect.Ptr:
+ return convertToString(reflect.Indirect(val), options)
+ case reflect.Interface:
+ if !val.IsNil() {
+ return convertToString(val.Elem(), options)
+ }
+ }
+
+ return "", nil
+}
+
+func convertUnmarshal(val string, retval reflect.Value) (bool, error) {
+ if retval.Type().NumMethod() > 0 && retval.CanInterface() {
+ if unmarshaler, ok := retval.Interface().(Unmarshaler); ok {
+ if retval.IsNil() {
+ retval.Set(reflect.New(retval.Type().Elem()))
+
+ // Re-assign from the new value
+ unmarshaler = retval.Interface().(Unmarshaler)
+ }
+
+ return true, unmarshaler.UnmarshalFlag(val)
+ }
+ }
+
+ if retval.Type().Kind() != reflect.Ptr && retval.CanAddr() {
+ return convertUnmarshal(val, retval.Addr())
+ }
+
+ if retval.Type().Kind() == reflect.Interface && !retval.IsNil() {
+ return convertUnmarshal(val, retval.Elem())
+ }
+
+ return false, nil
+}
+
+func convert(val string, retval reflect.Value, options multiTag) error {
+ if ok, err := convertUnmarshal(val, retval); ok {
+ return err
+ }
+
+ tp := retval.Type()
+
+ // Support for time.Duration
+ if tp == reflect.TypeOf((*time.Duration)(nil)).Elem() {
+ parsed, err := time.ParseDuration(val)
+
+ if err != nil {
+ return err
+ }
+
+ retval.SetInt(int64(parsed))
+ return nil
+ }
+
+ switch tp.Kind() {
+ case reflect.String:
+ retval.SetString(val)
+ case reflect.Bool:
+ if val == "" {
+ retval.SetBool(true)
+ } else {
+ b, err := strconv.ParseBool(val)
+
+ if err != nil {
+ return err
+ }
+
+ retval.SetBool(b)
+ }
+ case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+ base, err := getBase(options, 10)
+
+ if err != nil {
+ return err
+ }
+
+ parsed, err := strconv.ParseInt(val, base, tp.Bits())
+
+ if err != nil {
+ return err
+ }
+
+ retval.SetInt(parsed)
+ case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+ base, err := getBase(options, 10)
+
+ if err != nil {
+ return err
+ }
+
+ parsed, err := strconv.ParseUint(val, base, tp.Bits())
+
+ if err != nil {
+ return err
+ }
+
+ retval.SetUint(parsed)
+ case reflect.Float32, reflect.Float64:
+ parsed, err := strconv.ParseFloat(val, tp.Bits())
+
+ if err != nil {
+ return err
+ }
+
+ retval.SetFloat(parsed)
+ case reflect.Slice:
+ elemtp := tp.Elem()
+
+ elemvalptr := reflect.New(elemtp)
+ elemval := reflect.Indirect(elemvalptr)
+
+ if err := convert(val, elemval, options); err != nil {
+ return err
+ }
+
+ retval.Set(reflect.Append(retval, elemval))
+ case reflect.Map:
+ parts := strings.SplitN(val, ":", 2)
+
+ key := parts[0]
+ var value string
+
+ if len(parts) == 2 {
+ value = parts[1]
+ }
+
+ keytp := tp.Key()
+ keyval := reflect.New(keytp)
+
+ if err := convert(key, keyval, options); err != nil {
+ return err
+ }
+
+ valuetp := tp.Elem()
+ valueval := reflect.New(valuetp)
+
+ if err := convert(value, valueval, options); err != nil {
+ return err
+ }
+
+ if retval.IsNil() {
+ retval.Set(reflect.MakeMap(tp))
+ }
+
+ retval.SetMapIndex(reflect.Indirect(keyval), reflect.Indirect(valueval))
+ case reflect.Ptr:
+ if retval.IsNil() {
+ retval.Set(reflect.New(retval.Type().Elem()))
+ }
+
+ return convert(val, reflect.Indirect(retval), options)
+ case reflect.Interface:
+ if !retval.IsNil() {
+ return convert(val, retval.Elem(), options)
+ }
+ }
+
+ return nil
+}
+
+func isPrint(s string) bool {
+ for _, c := range s {
+ if !strconv.IsPrint(c) {
+ return false
+ }
+ }
+
+ return true
+}
+
+func quoteIfNeeded(s string) string {
+ if !isPrint(s) {
+ return strconv.Quote(s)
+ }
+
+ return s
+}
+
+func quoteIfNeededV(s []string) []string {
+ ret := make([]string, len(s))
+
+ for i, v := range s {
+ ret[i] = quoteIfNeeded(v)
+ }
+
+ return ret
+}
+
+func quoteV(s []string) []string {
+ ret := make([]string, len(s))
+
+ for i, v := range s {
+ ret[i] = strconv.Quote(v)
+ }
+
+ return ret
+}
+
+func unquoteIfPossible(s string) (string, error) {
+ if len(s) == 0 || s[0] != '"' {
+ return s, nil
+ }
+
+ return strconv.Unquote(s)
+}
diff --git a/vendor/github.com/jessevdk/go-flags/error.go b/vendor/github.com/jessevdk/go-flags/error.go
new file mode 100644
index 0000000..05528d8
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/error.go
@@ -0,0 +1,134 @@
+package flags
+
+import (
+ "fmt"
+)
+
+// ErrorType represents the type of error.
+type ErrorType uint
+
+const (
+ // ErrUnknown indicates a generic error.
+ ErrUnknown ErrorType = iota
+
+ // ErrExpectedArgument indicates that an argument was expected.
+ ErrExpectedArgument
+
+ // ErrUnknownFlag indicates an unknown flag.
+ ErrUnknownFlag
+
+ // ErrUnknownGroup indicates an unknown group.
+ ErrUnknownGroup
+
+ // ErrMarshal indicates a marshalling error while converting values.
+ ErrMarshal
+
+ // ErrHelp indicates that the built-in help was shown (the error
+ // contains the help message).
+ ErrHelp
+
+ // ErrNoArgumentForBool indicates that an argument was given for a
+ // boolean flag (which don't not take any arguments).
+ ErrNoArgumentForBool
+
+ // ErrRequired indicates that a required flag was not provided.
+ ErrRequired
+
+ // ErrShortNameTooLong indicates that a short flag name was specified,
+ // longer than one character.
+ ErrShortNameTooLong
+
+ // ErrDuplicatedFlag indicates that a short or long flag has been
+ // defined more than once
+ ErrDuplicatedFlag
+
+ // ErrTag indicates an error while parsing flag tags.
+ ErrTag
+
+ // ErrCommandRequired indicates that a command was required but not
+ // specified
+ ErrCommandRequired
+
+ // ErrUnknownCommand indicates that an unknown command was specified.
+ ErrUnknownCommand
+
+ // ErrInvalidChoice indicates an invalid option value which only allows
+ // a certain number of choices.
+ ErrInvalidChoice
+
+ // ErrInvalidTag indicates an invalid tag or invalid use of an existing tag
+ ErrInvalidTag
+)
+
+func (e ErrorType) String() string {
+ switch e {
+ case ErrUnknown:
+ return "unknown"
+ case ErrExpectedArgument:
+ return "expected argument"
+ case ErrUnknownFlag:
+ return "unknown flag"
+ case ErrUnknownGroup:
+ return "unknown group"
+ case ErrMarshal:
+ return "marshal"
+ case ErrHelp:
+ return "help"
+ case ErrNoArgumentForBool:
+ return "no argument for bool"
+ case ErrRequired:
+ return "required"
+ case ErrShortNameTooLong:
+ return "short name too long"
+ case ErrDuplicatedFlag:
+ return "duplicated flag"
+ case ErrTag:
+ return "tag"
+ case ErrCommandRequired:
+ return "command required"
+ case ErrUnknownCommand:
+ return "unknown command"
+ case ErrInvalidChoice:
+ return "invalid choice"
+ case ErrInvalidTag:
+ return "invalid tag"
+ }
+
+ return "unrecognized error type"
+}
+
+// Error represents a parser error. The error returned from Parse is of this
+// type. The error contains both a Type and Message.
+type Error struct {
+ // The type of error
+ Type ErrorType
+
+ // The error message
+ Message string
+}
+
+// Error returns the error's message
+func (e *Error) Error() string {
+ return e.Message
+}
+
+func newError(tp ErrorType, message string) *Error {
+ return &Error{
+ Type: tp,
+ Message: message,
+ }
+}
+
+func newErrorf(tp ErrorType, format string, args ...interface{}) *Error {
+ return newError(tp, fmt.Sprintf(format, args...))
+}
+
+func wrapError(err error) *Error {
+ ret, ok := err.(*Error)
+
+ if !ok {
+ return newError(ErrUnknown, err.Error())
+ }
+
+ return ret
+}
diff --git a/vendor/github.com/jessevdk/go-flags/flags.go b/vendor/github.com/jessevdk/go-flags/flags.go
new file mode 100644
index 0000000..889762d
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/flags.go
@@ -0,0 +1,258 @@
+// Copyright 2012 Jesse van den Kieboom. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package flags provides an extensive command line option parser.
+The flags package is similar in functionality to the go built-in flag package
+but provides more options and uses reflection to provide a convenient and
+succinct way of specifying command line options.
+
+
+Supported features
+
+The following features are supported in go-flags:
+
+ Options with short names (-v)
+ Options with long names (--verbose)
+ Options with and without arguments (bool v.s. other type)
+ Options with optional arguments and default values
+ Option default values from ENVIRONMENT_VARIABLES, including slice and map values
+ Multiple option groups each containing a set of options
+ Generate and print well-formatted help message
+ Passing remaining command line arguments after -- (optional)
+ Ignoring unknown command line options (optional)
+ Supports -I/usr/include -I=/usr/include -I /usr/include option argument specification
+ Supports multiple short options -aux
+ Supports all primitive go types (string, int{8..64}, uint{8..64}, float)
+ Supports same option multiple times (can store in slice or last option counts)
+ Supports maps
+ Supports function callbacks
+ Supports namespaces for (nested) option groups
+
+Additional features specific to Windows:
+ Options with short names (/v)
+ Options with long names (/verbose)
+ Windows-style options with arguments use a colon as the delimiter
+ Modify generated help message with Windows-style / options
+ Windows style options can be disabled at build time using the "forceposix"
+ build tag
+
+
+Basic usage
+
+The flags package uses structs, reflection and struct field tags
+to allow users to specify command line options. This results in very simple
+and concise specification of your application options. For example:
+
+ type Options struct {
+ Verbose []bool `short:"v" long:"verbose" description:"Show verbose debug information"`
+ }
+
+This specifies one option with a short name -v and a long name --verbose.
+When either -v or --verbose is found on the command line, a 'true' value
+will be appended to the Verbose field. e.g. when specifying -vvv, the
+resulting value of Verbose will be {[true, true, true]}.
+
+Slice options work exactly the same as primitive type options, except that
+whenever the option is encountered, a value is appended to the slice.
+
+Map options from string to primitive type are also supported. On the command
+line, you specify the value for such an option as key:value. For example
+
+ type Options struct {
+ AuthorInfo string[string] `short:"a"`
+ }
+
+Then, the AuthorInfo map can be filled with something like
+-a name:Jesse -a "surname:van den Kieboom".
+
+Finally, for full control over the conversion between command line argument
+values and options, user defined types can choose to implement the Marshaler
+and Unmarshaler interfaces.
+
+
+Available field tags
+
+The following is a list of tags for struct fields supported by go-flags:
+
+ short: the short name of the option (single character)
+ long: the long name of the option
+ required: if non empty, makes the option required to appear on the command
+ line. If a required option is not present, the parser will
+ return ErrRequired (optional)
+ description: the description of the option (optional)
+ long-description: the long description of the option. Currently only
+ displayed in generated man pages (optional)
+ no-flag: if non-empty, this field is ignored as an option (optional)
+
+ optional: if non-empty, makes the argument of the option optional. When an
+ argument is optional it can only be specified using
+ --option=argument (optional)
+ optional-value: the value of an optional option when the option occurs
+ without an argument. This tag can be specified multiple
+ times in the case of maps or slices (optional)
+ default: the default value of an option. This tag can be specified
+ multiple times in the case of slices or maps (optional)
+ default-mask: when specified, this value will be displayed in the help
+ instead of the actual default value. This is useful
+ mostly for hiding otherwise sensitive information from
+ showing up in the help. If default-mask takes the special
+ value "-", then no default value will be shown at all
+ (optional)
+ env: the default value of the option is overridden from the
+ specified environment variable, if one has been defined.
+ (optional)
+ env-delim: the 'env' default value from environment is split into
+ multiple values with the given delimiter string, use with
+ slices and maps (optional)
+ value-name: the name of the argument value (to be shown in the help)
+ (optional)
+ choice: limits the values for an option to a set of values.
+ This tag can be specified multiple times (optional)
+ hidden: if non-empty, the option is not visible in the help or man page.
+
+ base: a base (radix) used to convert strings to integer values, the
+ default base is 10 (i.e. decimal) (optional)
+
+ ini-name: the explicit ini option name (optional)
+ no-ini: if non-empty this field is ignored as an ini option
+ (optional)
+
+ group: when specified on a struct field, makes the struct
+ field a separate group with the given name (optional)
+ namespace: when specified on a group struct field, the namespace
+ gets prepended to every option's long name and
+ subgroup's namespace of this group, separated by
+ the parser's namespace delimiter (optional)
+ command: when specified on a struct field, makes the struct
+ field a (sub)command with the given name (optional)
+ subcommands-optional: when specified on a command struct field, makes
+ any subcommands of that command optional (optional)
+ alias: when specified on a command struct field, adds the
+ specified name as an alias for the command. Can be
+ be specified multiple times to add more than one
+ alias (optional)
+ positional-args: when specified on a field with a struct type,
+ uses the fields of that struct to parse remaining
+ positional command line arguments into (in order
+ of the fields). If a field has a slice type,
+ then all remaining arguments will be added to it.
+ Positional arguments are optional by default,
+ unless the "required" tag is specified together
+ with the "positional-args" tag. The "required" tag
+ can also be set on the individual rest argument
+ fields, to require only the first N positional
+ arguments. If the "required" tag is set on the
+ rest arguments slice, then its value determines
+ the minimum amount of rest arguments that needs to
+ be provided (e.g. `required:"2"`) (optional)
+ positional-arg-name: used on a field in a positional argument struct; name
+ of the positional argument placeholder to be shown in
+ the help (optional)
+
+Either the `short:` tag or the `long:` must be specified to make the field eligible as an
+option.
+
+
+Option groups
+
+Option groups are a simple way to semantically separate your options. All
+options in a particular group are shown together in the help under the name
+of the group. Namespaces can be used to specify option long names more
+precisely and emphasize the options affiliation to their group.
+
+There are currently three ways to specify option groups.
+
+ 1. Use NewNamedParser specifying the various option groups.
+ 2. Use AddGroup to add a group to an existing parser.
+ 3. Add a struct field to the top-level options annotated with the
+ group:"group-name" tag.
+
+
+
+Commands
+
+The flags package also has basic support for commands. Commands are often
+used in monolithic applications that support various commands or actions.
+Take git for example, all of the add, commit, checkout, etc. are called
+commands. Using commands you can easily separate multiple functions of your
+application.
+
+There are currently two ways to specify a command.
+
+ 1. Use AddCommand on an existing parser.
+ 2. Add a struct field to your options struct annotated with the
+ command:"command-name" tag.
+
+The most common, idiomatic way to implement commands is to define a global
+parser instance and implement each command in a separate file. These
+command files should define a go init function which calls AddCommand on
+the global parser.
+
+When parsing ends and there is an active command and that command implements
+the Commander interface, then its Execute method will be run with the
+remaining command line arguments.
+
+Command structs can have options which become valid to parse after the
+command has been specified on the command line, in addition to the options
+of all the parent commands. I.e. considering a -v flag on the parser and an
+add command, the following are equivalent:
+
+ ./app -v add
+ ./app add -v
+
+However, if the -v flag is defined on the add command, then the first of
+the two examples above would fail since the -v flag is not defined before
+the add command.
+
+
+Completion
+
+go-flags has builtin support to provide bash completion of flags, commands
+and argument values. To use completion, the binary which uses go-flags
+can be invoked in a special environment to list completion of the current
+command line argument. It should be noted that this `executes` your application,
+and it is up to the user to make sure there are no negative side effects (for
+example from init functions).
+
+Setting the environment variable `GO_FLAGS_COMPLETION=1` enables completion
+by replacing the argument parsing routine with the completion routine which
+outputs completions for the passed arguments. The basic invocation to
+complete a set of arguments is therefore:
+
+ GO_FLAGS_COMPLETION=1 ./completion-example arg1 arg2 arg3
+
+where `completion-example` is the binary, `arg1` and `arg2` are
+the current arguments, and `arg3` (the last argument) is the argument
+to be completed. If the GO_FLAGS_COMPLETION is set to "verbose", then
+descriptions of possible completion items will also be shown, if there
+are more than 1 completion items.
+
+To use this with bash completion, a simple file can be written which
+calls the binary which supports go-flags completion:
+
+ _completion_example() {
+ # All arguments except the first one
+ args=("${COMP_WORDS[@]:1:$COMP_CWORD}")
+
+ # Only split on newlines
+ local IFS=$'\n'
+
+ # Call completion (note that the first element of COMP_WORDS is
+ # the executable itself)
+ COMPREPLY=($(GO_FLAGS_COMPLETION=1 ${COMP_WORDS[0]} "${args[@]}"))
+ return 0
+ }
+
+ complete -F _completion_example completion-example
+
+Completion requires the parser option PassDoubleDash and is therefore enforced if the environment variable GO_FLAGS_COMPLETION is set.
+
+Customized completion for argument values is supported by implementing
+the flags.Completer interface for the argument value type. An example
+of a type which does so is the flags.Filename type, an alias of string
+allowing simple filename completion. A slice or array argument value
+whose element type implements flags.Completer will also be completed.
+*/
+package flags
diff --git a/vendor/github.com/jessevdk/go-flags/group.go b/vendor/github.com/jessevdk/go-flags/group.go
new file mode 100644
index 0000000..9e057ab
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/group.go
@@ -0,0 +1,406 @@
+// Copyright 2012 Jesse van den Kieboom. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package flags
+
+import (
+ "errors"
+ "reflect"
+ "strings"
+ "unicode/utf8"
+)
+
+// ErrNotPointerToStruct indicates that a provided data container is not
+// a pointer to a struct. Only pointers to structs are valid data containers
+// for options.
+var ErrNotPointerToStruct = errors.New("provided data is not a pointer to struct")
+
+// Group represents an option group. Option groups can be used to logically
+// group options together under a description. Groups are only used to provide
+// more structure to options both for the user (as displayed in the help message)
+// and for you, since groups can be nested.
+type Group struct {
+ // A short description of the group. The
+ // short description is primarily used in the built-in generated help
+ // message
+ ShortDescription string
+
+ // A long description of the group. The long
+ // description is primarily used to present information on commands
+ // (Command embeds Group) in the built-in generated help and man pages.
+ LongDescription string
+
+ // The namespace of the group
+ Namespace string
+
+ // If true, the group is not displayed in the help or man page
+ Hidden bool
+
+ // The parent of the group or nil if it has no parent
+ parent interface{}
+
+ // All the options in the group
+ options []*Option
+
+ // All the subgroups
+ groups []*Group
+
+ // Whether the group represents the built-in help group
+ isBuiltinHelp bool
+
+ data interface{}
+}
+
+type scanHandler func(reflect.Value, *reflect.StructField) (bool, error)
+
+// AddGroup adds a new group to the command with the given name and data. The
+// data needs to be a pointer to a struct from which the fields indicate which
+// options are in the group.
+func (g *Group) AddGroup(shortDescription string, longDescription string, data interface{}) (*Group, error) {
+ group := newGroup(shortDescription, longDescription, data)
+
+ group.parent = g
+
+ if err := group.scan(); err != nil {
+ return nil, err
+ }
+
+ g.groups = append(g.groups, group)
+ return group, nil
+}
+
+// Groups returns the list of groups embedded in this group.
+func (g *Group) Groups() []*Group {
+ return g.groups
+}
+
+// Options returns the list of options in this group.
+func (g *Group) Options() []*Option {
+ return g.options
+}
+
+// Find locates the subgroup with the given short description and returns it.
+// If no such group can be found Find will return nil. Note that the description
+// is matched case insensitively.
+func (g *Group) Find(shortDescription string) *Group {
+ lshortDescription := strings.ToLower(shortDescription)
+
+ var ret *Group
+
+ g.eachGroup(func(gg *Group) {
+ if gg != g && strings.ToLower(gg.ShortDescription) == lshortDescription {
+ ret = gg
+ }
+ })
+
+ return ret
+}
+
+func (g *Group) findOption(matcher func(*Option) bool) (option *Option) {
+ g.eachGroup(func(g *Group) {
+ for _, opt := range g.options {
+ if option == nil && matcher(opt) {
+ option = opt
+ }
+ }
+ })
+
+ return option
+}
+
+// FindOptionByLongName finds an option that is part of the group, or any of its
+// subgroups, by matching its long name (including the option namespace).
+func (g *Group) FindOptionByLongName(longName string) *Option {
+ return g.findOption(func(option *Option) bool {
+ return option.LongNameWithNamespace() == longName
+ })
+}
+
+// FindOptionByShortName finds an option that is part of the group, or any of
+// its subgroups, by matching its short name.
+func (g *Group) FindOptionByShortName(shortName rune) *Option {
+ return g.findOption(func(option *Option) bool {
+ return option.ShortName == shortName
+ })
+}
+
+func newGroup(shortDescription string, longDescription string, data interface{}) *Group {
+ return &Group{
+ ShortDescription: shortDescription,
+ LongDescription: longDescription,
+
+ data: data,
+ }
+}
+
+func (g *Group) optionByName(name string, namematch func(*Option, string) bool) *Option {
+ prio := 0
+ var retopt *Option
+
+ g.eachGroup(func(g *Group) {
+ for _, opt := range g.options {
+ if namematch != nil && namematch(opt, name) && prio < 4 {
+ retopt = opt
+ prio = 4
+ }
+
+ if name == opt.field.Name && prio < 3 {
+ retopt = opt
+ prio = 3
+ }
+
+ if name == opt.LongNameWithNamespace() && prio < 2 {
+ retopt = opt
+ prio = 2
+ }
+
+ if opt.ShortName != 0 && name == string(opt.ShortName) && prio < 1 {
+ retopt = opt
+ prio = 1
+ }
+ }
+ })
+
+ return retopt
+}
+
+func (g *Group) eachGroup(f func(*Group)) {
+ f(g)
+
+ for _, gg := range g.groups {
+ gg.eachGroup(f)
+ }
+}
+
+func isStringFalsy(s string) bool {
+ return s == "" || s == "false" || s == "no" || s == "0"
+}
+
+func (g *Group) scanStruct(realval reflect.Value, sfield *reflect.StructField, handler scanHandler) error {
+ stype := realval.Type()
+
+ if sfield != nil {
+ if ok, err := handler(realval, sfield); err != nil {
+ return err
+ } else if ok {
+ return nil
+ }
+ }
+
+ for i := 0; i < stype.NumField(); i++ {
+ field := stype.Field(i)
+
+ // PkgName is set only for non-exported fields, which we ignore
+ if field.PkgPath != "" && !field.Anonymous {
+ continue
+ }
+
+ mtag := newMultiTag(string(field.Tag))
+
+ if err := mtag.Parse(); err != nil {
+ return err
+ }
+
+ // Skip fields with the no-flag tag
+ if mtag.Get("no-flag") != "" {
+ continue
+ }
+
+ // Dive deep into structs or pointers to structs
+ kind := field.Type.Kind()
+ fld := realval.Field(i)
+
+ if kind == reflect.Struct {
+ if err := g.scanStruct(fld, &field, handler); err != nil {
+ return err
+ }
+ } else if kind == reflect.Ptr && field.Type.Elem().Kind() == reflect.Struct {
+ flagCountBefore := len(g.options) + len(g.groups)
+
+ if fld.IsNil() {
+ fld = reflect.New(fld.Type().Elem())
+ }
+
+ if err := g.scanStruct(reflect.Indirect(fld), &field, handler); err != nil {
+ return err
+ }
+
+ if len(g.options)+len(g.groups) != flagCountBefore {
+ realval.Field(i).Set(fld)
+ }
+ }
+
+ longname := mtag.Get("long")
+ shortname := mtag.Get("short")
+
+ // Need at least either a short or long name
+ if longname == "" && shortname == "" && mtag.Get("ini-name") == "" {
+ continue
+ }
+
+ short := rune(0)
+ rc := utf8.RuneCountInString(shortname)
+
+ if rc > 1 {
+ return newErrorf(ErrShortNameTooLong,
+ "short names can only be 1 character long, not `%s'",
+ shortname)
+
+ } else if rc == 1 {
+ short, _ = utf8.DecodeRuneInString(shortname)
+ }
+
+ description := mtag.Get("description")
+ def := mtag.GetMany("default")
+
+ optionalValue := mtag.GetMany("optional-value")
+ valueName := mtag.Get("value-name")
+ defaultMask := mtag.Get("default-mask")
+
+ optional := !isStringFalsy(mtag.Get("optional"))
+ required := !isStringFalsy(mtag.Get("required"))
+ choices := mtag.GetMany("choice")
+ hidden := !isStringFalsy(mtag.Get("hidden"))
+
+ option := &Option{
+ Description: description,
+ ShortName: short,
+ LongName: longname,
+ Default: def,
+ EnvDefaultKey: mtag.Get("env"),
+ EnvDefaultDelim: mtag.Get("env-delim"),
+ OptionalArgument: optional,
+ OptionalValue: optionalValue,
+ Required: required,
+ ValueName: valueName,
+ DefaultMask: defaultMask,
+ Choices: choices,
+ Hidden: hidden,
+
+ group: g,
+
+ field: field,
+ value: realval.Field(i),
+ tag: mtag,
+ }
+
+ if option.isBool() && option.Default != nil {
+ return newErrorf(ErrInvalidTag,
+ "boolean flag `%s' may not have default values, they always default to `false' and can only be turned on",
+ option.shortAndLongName())
+ }
+
+ g.options = append(g.options, option)
+ }
+
+ return nil
+}
+
+func (g *Group) checkForDuplicateFlags() *Error {
+ shortNames := make(map[rune]*Option)
+ longNames := make(map[string]*Option)
+
+ var duplicateError *Error
+
+ g.eachGroup(func(g *Group) {
+ for _, option := range g.options {
+ if option.LongName != "" {
+ longName := option.LongNameWithNamespace()
+
+ if otherOption, ok := longNames[longName]; ok {
+ duplicateError = newErrorf(ErrDuplicatedFlag, "option `%s' uses the same long name as option `%s'", option, otherOption)
+ return
+ }
+ longNames[longName] = option
+ }
+ if option.ShortName != 0 {
+ if otherOption, ok := shortNames[option.ShortName]; ok {
+ duplicateError = newErrorf(ErrDuplicatedFlag, "option `%s' uses the same short name as option `%s'", option, otherOption)
+ return
+ }
+ shortNames[option.ShortName] = option
+ }
+ }
+ })
+
+ return duplicateError
+}
+
+func (g *Group) scanSubGroupHandler(realval reflect.Value, sfield *reflect.StructField) (bool, error) {
+ mtag := newMultiTag(string(sfield.Tag))
+
+ if err := mtag.Parse(); err != nil {
+ return true, err
+ }
+
+ subgroup := mtag.Get("group")
+
+ if len(subgroup) != 0 {
+ var ptrval reflect.Value
+
+ if realval.Kind() == reflect.Ptr {
+ ptrval = realval
+
+ if ptrval.IsNil() {
+ ptrval.Set(reflect.New(ptrval.Type()))
+ }
+ } else {
+ ptrval = realval.Addr()
+ }
+
+ description := mtag.Get("description")
+
+ group, err := g.AddGroup(subgroup, description, ptrval.Interface())
+
+ if err != nil {
+ return true, err
+ }
+
+ group.Namespace = mtag.Get("namespace")
+ group.Hidden = mtag.Get("hidden") != ""
+
+ return true, nil
+ }
+
+ return false, nil
+}
+
+func (g *Group) scanType(handler scanHandler) error {
+ // Get all the public fields in the data struct
+ ptrval := reflect.ValueOf(g.data)
+
+ if ptrval.Type().Kind() != reflect.Ptr {
+ panic(ErrNotPointerToStruct)
+ }
+
+ stype := ptrval.Type().Elem()
+
+ if stype.Kind() != reflect.Struct {
+ panic(ErrNotPointerToStruct)
+ }
+
+ realval := reflect.Indirect(ptrval)
+
+ if err := g.scanStruct(realval, nil, handler); err != nil {
+ return err
+ }
+
+ if err := g.checkForDuplicateFlags(); err != nil {
+ return err
+ }
+
+ return nil
+}
+
+func (g *Group) scan() error {
+ return g.scanType(g.scanSubGroupHandler)
+}
+
+func (g *Group) groupByName(name string) *Group {
+ if len(name) == 0 {
+ return g
+ }
+
+ return g.Find(name)
+}
diff --git a/vendor/github.com/jessevdk/go-flags/help.go b/vendor/github.com/jessevdk/go-flags/help.go
new file mode 100644
index 0000000..d380305
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/help.go
@@ -0,0 +1,491 @@
+// Copyright 2012 Jesse van den Kieboom. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package flags
+
+import (
+ "bufio"
+ "bytes"
+ "fmt"
+ "io"
+ "runtime"
+ "strings"
+ "unicode/utf8"
+)
+
+type alignmentInfo struct {
+ maxLongLen int
+ hasShort bool
+ hasValueName bool
+ terminalColumns int
+ indent bool
+}
+
+const (
+ paddingBeforeOption = 2
+ distanceBetweenOptionAndDescription = 2
+)
+
+func (a *alignmentInfo) descriptionStart() int {
+ ret := a.maxLongLen + distanceBetweenOptionAndDescription
+
+ if a.hasShort {
+ ret += 2
+ }
+
+ if a.maxLongLen > 0 {
+ ret += 4
+ }
+
+ if a.hasValueName {
+ ret += 3
+ }
+
+ return ret
+}
+
+func (a *alignmentInfo) updateLen(name string, indent bool) {
+ l := utf8.RuneCountInString(name)
+
+ if indent {
+ l = l + 4
+ }
+
+ if l > a.maxLongLen {
+ a.maxLongLen = l
+ }
+}
+
+func (p *Parser) getAlignmentInfo() alignmentInfo {
+ ret := alignmentInfo{
+ maxLongLen: 0,
+ hasShort: false,
+ hasValueName: false,
+ terminalColumns: getTerminalColumns(),
+ }
+
+ if ret.terminalColumns <= 0 {
+ ret.terminalColumns = 80
+ }
+
+ var prevcmd *Command
+
+ p.eachActiveGroup(func(c *Command, grp *Group) {
+ if c != prevcmd {
+ for _, arg := range c.args {
+ ret.updateLen(arg.Name, c != p.Command)
+ }
+ }
+
+ for _, info := range grp.options {
+ if !info.canCli() {
+ continue
+ }
+
+ if info.ShortName != 0 {
+ ret.hasShort = true
+ }
+
+ if len(info.ValueName) > 0 {
+ ret.hasValueName = true
+ }
+
+ l := info.LongNameWithNamespace() + info.ValueName
+
+ if len(info.Choices) != 0 {
+ l += "[" + strings.Join(info.Choices, "|") + "]"
+ }
+
+ ret.updateLen(l, c != p.Command)
+ }
+ })
+
+ return ret
+}
+
+func wrapText(s string, l int, prefix string) string {
+ var ret string
+
+ if l < 10 {
+ l = 10
+ }
+
+ // Basic text wrapping of s at spaces to fit in l
+ lines := strings.Split(s, "\n")
+
+ for _, line := range lines {
+ var retline string
+
+ line = strings.TrimSpace(line)
+
+ for len(line) > l {
+ // Try to split on space
+ suffix := ""
+
+ pos := strings.LastIndex(line[:l], " ")
+
+ if pos < 0 {
+ pos = l - 1
+ suffix = "-\n"
+ }
+
+ if len(retline) != 0 {
+ retline += "\n" + prefix
+ }
+
+ retline += strings.TrimSpace(line[:pos]) + suffix
+ line = strings.TrimSpace(line[pos:])
+ }
+
+ if len(line) > 0 {
+ if len(retline) != 0 {
+ retline += "\n" + prefix
+ }
+
+ retline += line
+ }
+
+ if len(ret) > 0 {
+ ret += "\n"
+
+ if len(retline) > 0 {
+ ret += prefix
+ }
+ }
+
+ ret += retline
+ }
+
+ return ret
+}
+
+func (p *Parser) writeHelpOption(writer *bufio.Writer, option *Option, info alignmentInfo) {
+ line := &bytes.Buffer{}
+
+ prefix := paddingBeforeOption
+
+ if info.indent {
+ prefix += 4
+ }
+
+ if option.Hidden {
+ return
+ }
+
+ line.WriteString(strings.Repeat(" ", prefix))
+
+ if option.ShortName != 0 {
+ line.WriteRune(defaultShortOptDelimiter)
+ line.WriteRune(option.ShortName)
+ } else if info.hasShort {
+ line.WriteString(" ")
+ }
+
+ descstart := info.descriptionStart() + paddingBeforeOption
+
+ if len(option.LongName) > 0 {
+ if option.ShortName != 0 {
+ line.WriteString(", ")
+ } else if info.hasShort {
+ line.WriteString(" ")
+ }
+
+ line.WriteString(defaultLongOptDelimiter)
+ line.WriteString(option.LongNameWithNamespace())
+ }
+
+ if option.canArgument() {
+ line.WriteRune(defaultNameArgDelimiter)
+
+ if len(option.ValueName) > 0 {
+ line.WriteString(option.ValueName)
+ }
+
+ if len(option.Choices) > 0 {
+ line.WriteString("[" + strings.Join(option.Choices, "|") + "]")
+ }
+ }
+
+ written := line.Len()
+ line.WriteTo(writer)
+
+ if option.Description != "" {
+ dw := descstart - written
+ writer.WriteString(strings.Repeat(" ", dw))
+
+ var def string
+
+ if len(option.DefaultMask) != 0 {
+ if option.DefaultMask != "-" {
+ def = option.DefaultMask
+ }
+ } else {
+ def = option.defaultLiteral
+ }
+
+ var envDef string
+ if option.EnvDefaultKey != "" {
+ var envPrintable string
+ if runtime.GOOS == "windows" {
+ envPrintable = "%" + option.EnvDefaultKey + "%"
+ } else {
+ envPrintable = "$" + option.EnvDefaultKey
+ }
+ envDef = fmt.Sprintf(" [%s]", envPrintable)
+ }
+
+ var desc string
+
+ if def != "" {
+ desc = fmt.Sprintf("%s (default: %v)%s", option.Description, def, envDef)
+ } else {
+ desc = option.Description + envDef
+ }
+
+ writer.WriteString(wrapText(desc,
+ info.terminalColumns-descstart,
+ strings.Repeat(" ", descstart)))
+ }
+
+ writer.WriteString("\n")
+}
+
+func maxCommandLength(s []*Command) int {
+ if len(s) == 0 {
+ return 0
+ }
+
+ ret := len(s[0].Name)
+
+ for _, v := range s[1:] {
+ l := len(v.Name)
+
+ if l > ret {
+ ret = l
+ }
+ }
+
+ return ret
+}
+
+// WriteHelp writes a help message containing all the possible options and
+// their descriptions to the provided writer. Note that the HelpFlag parser
+// option provides a convenient way to add a -h/--help option group to the
+// command line parser which will automatically show the help messages using
+// this method.
+func (p *Parser) WriteHelp(writer io.Writer) {
+ if writer == nil {
+ return
+ }
+
+ wr := bufio.NewWriter(writer)
+ aligninfo := p.getAlignmentInfo()
+
+ cmd := p.Command
+
+ for cmd.Active != nil {
+ cmd = cmd.Active
+ }
+
+ if p.Name != "" {
+ wr.WriteString("Usage:\n")
+ wr.WriteString(" ")
+
+ allcmd := p.Command
+
+ for allcmd != nil {
+ var usage string
+
+ if allcmd == p.Command {
+ if len(p.Usage) != 0 {
+ usage = p.Usage
+ } else if p.Options&HelpFlag != 0 {
+ usage = "[OPTIONS]"
+ }
+ } else if us, ok := allcmd.data.(Usage); ok {
+ usage = us.Usage()
+ } else if allcmd.hasCliOptions() {
+ usage = fmt.Sprintf("[%s-OPTIONS]", allcmd.Name)
+ }
+
+ if len(usage) != 0 {
+ fmt.Fprintf(wr, " %s %s", allcmd.Name, usage)
+ } else {
+ fmt.Fprintf(wr, " %s", allcmd.Name)
+ }
+
+ if len(allcmd.args) > 0 {
+ fmt.Fprintf(wr, " ")
+ }
+
+ for i, arg := range allcmd.args {
+ if i != 0 {
+ fmt.Fprintf(wr, " ")
+ }
+
+ name := arg.Name
+
+ if arg.isRemaining() {
+ name = name + "..."
+ }
+
+ if !allcmd.ArgsRequired {
+ fmt.Fprintf(wr, "[%s]", name)
+ } else {
+ fmt.Fprintf(wr, "%s", name)
+ }
+ }
+
+ if allcmd.Active == nil && len(allcmd.commands) > 0 {
+ var co, cc string
+
+ if allcmd.SubcommandsOptional {
+ co, cc = "[", "]"
+ } else {
+ co, cc = "<", ">"
+ }
+
+ visibleCommands := allcmd.visibleCommands()
+
+ if len(visibleCommands) > 3 {
+ fmt.Fprintf(wr, " %scommand%s", co, cc)
+ } else {
+ subcommands := allcmd.sortedVisibleCommands()
+ names := make([]string, len(subcommands))
+
+ for i, subc := range subcommands {
+ names[i] = subc.Name
+ }
+
+ fmt.Fprintf(wr, " %s%s%s", co, strings.Join(names, " | "), cc)
+ }
+ }
+
+ allcmd = allcmd.Active
+ }
+
+ fmt.Fprintln(wr)
+
+ if len(cmd.LongDescription) != 0 {
+ fmt.Fprintln(wr)
+
+ t := wrapText(cmd.LongDescription,
+ aligninfo.terminalColumns,
+ "")
+
+ fmt.Fprintln(wr, t)
+ }
+ }
+
+ c := p.Command
+
+ for c != nil {
+ printcmd := c != p.Command
+
+ c.eachGroup(func(grp *Group) {
+ first := true
+
+ // Skip built-in help group for all commands except the top-level
+ // parser
+ if grp.Hidden || (grp.isBuiltinHelp && c != p.Command) {
+ return
+ }
+
+ for _, info := range grp.options {
+ if !info.canCli() || info.Hidden {
+ continue
+ }
+
+ if printcmd {
+ fmt.Fprintf(wr, "\n[%s command options]\n", c.Name)
+ aligninfo.indent = true
+ printcmd = false
+ }
+
+ if first && cmd.Group != grp {
+ fmt.Fprintln(wr)
+
+ if aligninfo.indent {
+ wr.WriteString(" ")
+ }
+
+ fmt.Fprintf(wr, "%s:\n", grp.ShortDescription)
+ first = false
+ }
+
+ p.writeHelpOption(wr, info, aligninfo)
+ }
+ })
+
+ var args []*Arg
+ for _, arg := range c.args {
+ if arg.Description != "" {
+ args = append(args, arg)
+ }
+ }
+
+ if len(args) > 0 {
+ if c == p.Command {
+ fmt.Fprintf(wr, "\nArguments:\n")
+ } else {
+ fmt.Fprintf(wr, "\n[%s command arguments]\n", c.Name)
+ }
+
+ descStart := aligninfo.descriptionStart() + paddingBeforeOption
+
+ for _, arg := range args {
+ argPrefix := strings.Repeat(" ", paddingBeforeOption)
+ argPrefix += arg.Name
+
+ if len(arg.Description) > 0 {
+ argPrefix += ":"
+ wr.WriteString(argPrefix)
+
+ // Space between "arg:" and the description start
+ descPadding := strings.Repeat(" ", descStart-len(argPrefix))
+ // How much space the description gets before wrapping
+ descWidth := aligninfo.terminalColumns - 1 - descStart
+ // Whitespace to which we can indent new description lines
+ descPrefix := strings.Repeat(" ", descStart)
+
+ wr.WriteString(descPadding)
+ wr.WriteString(wrapText(arg.Description, descWidth, descPrefix))
+ } else {
+ wr.WriteString(argPrefix)
+ }
+
+ fmt.Fprintln(wr)
+ }
+ }
+
+ c = c.Active
+ }
+
+ scommands := cmd.sortedVisibleCommands()
+
+ if len(scommands) > 0 {
+ maxnamelen := maxCommandLength(scommands)
+
+ fmt.Fprintln(wr)
+ fmt.Fprintln(wr, "Available commands:")
+
+ for _, c := range scommands {
+ fmt.Fprintf(wr, " %s", c.Name)
+
+ if len(c.ShortDescription) > 0 {
+ pad := strings.Repeat(" ", maxnamelen-len(c.Name))
+ fmt.Fprintf(wr, "%s %s", pad, c.ShortDescription)
+
+ if len(c.Aliases) > 0 {
+ fmt.Fprintf(wr, " (aliases: %s)", strings.Join(c.Aliases, ", "))
+ }
+
+ }
+
+ fmt.Fprintln(wr)
+ }
+ }
+
+ wr.Flush()
+}
diff --git a/vendor/github.com/jessevdk/go-flags/ini.go b/vendor/github.com/jessevdk/go-flags/ini.go
new file mode 100644
index 0000000..e714d3d
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/ini.go
@@ -0,0 +1,597 @@
+package flags
+
+import (
+ "bufio"
+ "fmt"
+ "io"
+ "os"
+ "reflect"
+ "sort"
+ "strconv"
+ "strings"
+)
+
+// IniError contains location information on where an error occurred.
+type IniError struct {
+ // The error message.
+ Message string
+
+ // The filename of the file in which the error occurred.
+ File string
+
+ // The line number at which the error occurred.
+ LineNumber uint
+}
+
+// Error provides a "file:line: message" formatted message of the ini error.
+func (x *IniError) Error() string {
+ return fmt.Sprintf(
+ "%s:%d: %s",
+ x.File,
+ x.LineNumber,
+ x.Message,
+ )
+}
+
+// IniOptions for writing
+type IniOptions uint
+
+const (
+ // IniNone indicates no options.
+ IniNone IniOptions = 0
+
+ // IniIncludeDefaults indicates that default values should be written.
+ IniIncludeDefaults = 1 << iota
+
+ // IniCommentDefaults indicates that if IniIncludeDefaults is used
+ // options with default values are written but commented out.
+ IniCommentDefaults
+
+ // IniIncludeComments indicates that comments containing the description
+ // of an option should be written.
+ IniIncludeComments
+
+ // IniDefault provides a default set of options.
+ IniDefault = IniIncludeComments
+)
+
+// IniParser is a utility to read and write flags options from and to ini
+// formatted strings.
+type IniParser struct {
+ ParseAsDefaults bool // override default flags
+
+ parser *Parser
+}
+
+type iniValue struct {
+ Name string
+ Value string
+ Quoted bool
+ LineNumber uint
+}
+
+type iniSection []iniValue
+
+type ini struct {
+ File string
+ Sections map[string]iniSection
+}
+
+// NewIniParser creates a new ini parser for a given Parser.
+func NewIniParser(p *Parser) *IniParser {
+ return &IniParser{
+ parser: p,
+ }
+}
+
+// IniParse is a convenience function to parse command line options with default
+// settings from an ini formatted file. The provided data is a pointer to a struct
+// representing the default option group (named "Application Options"). For
+// more control, use flags.NewParser.
+func IniParse(filename string, data interface{}) error {
+ p := NewParser(data, Default)
+
+ return NewIniParser(p).ParseFile(filename)
+}
+
+// ParseFile parses flags from an ini formatted file. See Parse for more
+// information on the ini file format. The returned errors can be of the type
+// flags.Error or flags.IniError.
+func (i *IniParser) ParseFile(filename string) error {
+ ini, err := readIniFromFile(filename)
+
+ if err != nil {
+ return err
+ }
+
+ return i.parse(ini)
+}
+
+// Parse parses flags from an ini format. You can use ParseFile as a
+// convenience function to parse from a filename instead of a general
+// io.Reader.
+//
+// The format of the ini file is as follows:
+//
+// [Option group name]
+// option = value
+//
+// Each section in the ini file represents an option group or command in the
+// flags parser. The default flags parser option group (i.e. when using
+// flags.Parse) is named 'Application Options'. The ini option name is matched
+// in the following order:
+//
+// 1. Compared to the ini-name tag on the option struct field (if present)
+// 2. Compared to the struct field name
+// 3. Compared to the option long name (if present)
+// 4. Compared to the option short name (if present)
+//
+// Sections for nested groups and commands can be addressed using a dot `.'
+// namespacing notation (i.e [subcommand.Options]). Group section names are
+// matched case insensitive.
+//
+// The returned errors can be of the type flags.Error or flags.IniError.
+func (i *IniParser) Parse(reader io.Reader) error {
+ ini, err := readIni(reader, "")
+
+ if err != nil {
+ return err
+ }
+
+ return i.parse(ini)
+}
+
+// WriteFile writes the flags as ini format into a file. See Write
+// for more information. The returned error occurs when the specified file
+// could not be opened for writing.
+func (i *IniParser) WriteFile(filename string, options IniOptions) error {
+ return writeIniToFile(i, filename, options)
+}
+
+// Write writes the current values of all the flags to an ini format.
+// See Parse for more information on the ini file format. You typically
+// call this only after settings have been parsed since the default values of each
+// option are stored just before parsing the flags (this is only relevant when
+// IniIncludeDefaults is _not_ set in options).
+func (i *IniParser) Write(writer io.Writer, options IniOptions) {
+ writeIni(i, writer, options)
+}
+
+func readFullLine(reader *bufio.Reader) (string, error) {
+ var line []byte
+
+ for {
+ l, more, err := reader.ReadLine()
+
+ if err != nil {
+ return "", err
+ }
+
+ if line == nil && !more {
+ return string(l), nil
+ }
+
+ line = append(line, l...)
+
+ if !more {
+ break
+ }
+ }
+
+ return string(line), nil
+}
+
+func optionIniName(option *Option) string {
+ name := option.tag.Get("_read-ini-name")
+
+ if len(name) != 0 {
+ return name
+ }
+
+ name = option.tag.Get("ini-name")
+
+ if len(name) != 0 {
+ return name
+ }
+
+ return option.field.Name
+}
+
+func writeGroupIni(cmd *Command, group *Group, namespace string, writer io.Writer, options IniOptions) {
+ var sname string
+
+ if len(namespace) != 0 {
+ sname = namespace
+ }
+
+ if cmd.Group != group && len(group.ShortDescription) != 0 {
+ if len(sname) != 0 {
+ sname += "."
+ }
+
+ sname += group.ShortDescription
+ }
+
+ sectionwritten := false
+ comments := (options & IniIncludeComments) != IniNone
+
+ for _, option := range group.options {
+ if option.isFunc() || option.Hidden {
+ continue
+ }
+
+ if len(option.tag.Get("no-ini")) != 0 {
+ continue
+ }
+
+ val := option.value
+
+ if (options&IniIncludeDefaults) == IniNone && option.valueIsDefault() {
+ continue
+ }
+
+ if !sectionwritten {
+ fmt.Fprintf(writer, "[%s]\n", sname)
+ sectionwritten = true
+ }
+
+ if comments && len(option.Description) != 0 {
+ fmt.Fprintf(writer, "; %s\n", option.Description)
+ }
+
+ oname := optionIniName(option)
+
+ commentOption := (options&(IniIncludeDefaults|IniCommentDefaults)) == IniIncludeDefaults|IniCommentDefaults && option.valueIsDefault()
+
+ kind := val.Type().Kind()
+ switch kind {
+ case reflect.Slice:
+ kind = val.Type().Elem().Kind()
+
+ if val.Len() == 0 {
+ writeOption(writer, oname, kind, "", "", true, option.iniQuote)
+ } else {
+ for idx := 0; idx < val.Len(); idx++ {
+ v, _ := convertToString(val.Index(idx), option.tag)
+
+ writeOption(writer, oname, kind, "", v, commentOption, option.iniQuote)
+ }
+ }
+ case reflect.Map:
+ kind = val.Type().Elem().Kind()
+
+ if val.Len() == 0 {
+ writeOption(writer, oname, kind, "", "", true, option.iniQuote)
+ } else {
+ mkeys := val.MapKeys()
+ keys := make([]string, len(val.MapKeys()))
+ kkmap := make(map[string]reflect.Value)
+
+ for i, k := range mkeys {
+ keys[i], _ = convertToString(k, option.tag)
+ kkmap[keys[i]] = k
+ }
+
+ sort.Strings(keys)
+
+ for _, k := range keys {
+ v, _ := convertToString(val.MapIndex(kkmap[k]), option.tag)
+
+ writeOption(writer, oname, kind, k, v, commentOption, option.iniQuote)
+ }
+ }
+ default:
+ v, _ := convertToString(val, option.tag)
+
+ writeOption(writer, oname, kind, "", v, commentOption, option.iniQuote)
+ }
+
+ if comments {
+ fmt.Fprintln(writer)
+ }
+ }
+
+ if sectionwritten && !comments {
+ fmt.Fprintln(writer)
+ }
+}
+
+func writeOption(writer io.Writer, optionName string, optionType reflect.Kind, optionKey string, optionValue string, commentOption bool, forceQuote bool) {
+ if forceQuote || (optionType == reflect.String && !isPrint(optionValue)) {
+ optionValue = strconv.Quote(optionValue)
+ }
+
+ comment := ""
+ if commentOption {
+ comment = "; "
+ }
+
+ fmt.Fprintf(writer, "%s%s =", comment, optionName)
+
+ if optionKey != "" {
+ fmt.Fprintf(writer, " %s:%s", optionKey, optionValue)
+ } else if optionValue != "" {
+ fmt.Fprintf(writer, " %s", optionValue)
+ }
+
+ fmt.Fprintln(writer)
+}
+
+func writeCommandIni(command *Command, namespace string, writer io.Writer, options IniOptions) {
+ command.eachGroup(func(group *Group) {
+ if !group.Hidden {
+ writeGroupIni(command, group, namespace, writer, options)
+ }
+ })
+
+ for _, c := range command.commands {
+ var nns string
+
+ if c.Hidden {
+ continue
+ }
+
+ if len(namespace) != 0 {
+ nns = c.Name + "." + nns
+ } else {
+ nns = c.Name
+ }
+
+ writeCommandIni(c, nns, writer, options)
+ }
+}
+
+func writeIni(parser *IniParser, writer io.Writer, options IniOptions) {
+ writeCommandIni(parser.parser.Command, "", writer, options)
+}
+
+func writeIniToFile(parser *IniParser, filename string, options IniOptions) error {
+ file, err := os.Create(filename)
+
+ if err != nil {
+ return err
+ }
+
+ defer file.Close()
+
+ writeIni(parser, file, options)
+
+ return nil
+}
+
+func readIniFromFile(filename string) (*ini, error) {
+ file, err := os.Open(filename)
+
+ if err != nil {
+ return nil, err
+ }
+
+ defer file.Close()
+
+ return readIni(file, filename)
+}
+
+func readIni(contents io.Reader, filename string) (*ini, error) {
+ ret := &ini{
+ File: filename,
+ Sections: make(map[string]iniSection),
+ }
+
+ reader := bufio.NewReader(contents)
+
+ // Empty global section
+ section := make(iniSection, 0, 10)
+ sectionname := ""
+
+ ret.Sections[sectionname] = section
+
+ var lineno uint
+
+ for {
+ line, err := readFullLine(reader)
+
+ if err == io.EOF {
+ break
+ } else if err != nil {
+ return nil, err
+ }
+
+ lineno++
+ line = strings.TrimSpace(line)
+
+ // Skip empty lines and lines starting with ; (comments)
+ if len(line) == 0 || line[0] == ';' || line[0] == '#' {
+ continue
+ }
+
+ if line[0] == '[' {
+ if line[0] != '[' || line[len(line)-1] != ']' {
+ return nil, &IniError{
+ Message: "malformed section header",
+ File: filename,
+ LineNumber: lineno,
+ }
+ }
+
+ name := strings.TrimSpace(line[1 : len(line)-1])
+
+ if len(name) == 0 {
+ return nil, &IniError{
+ Message: "empty section name",
+ File: filename,
+ LineNumber: lineno,
+ }
+ }
+
+ sectionname = name
+ section = ret.Sections[name]
+
+ if section == nil {
+ section = make(iniSection, 0, 10)
+ ret.Sections[name] = section
+ }
+
+ continue
+ }
+
+ // Parse option here
+ keyval := strings.SplitN(line, "=", 2)
+
+ if len(keyval) != 2 {
+ return nil, &IniError{
+ Message: fmt.Sprintf("malformed key=value (%s)", line),
+ File: filename,
+ LineNumber: lineno,
+ }
+ }
+
+ name := strings.TrimSpace(keyval[0])
+ value := strings.TrimSpace(keyval[1])
+ quoted := false
+
+ if len(value) != 0 && value[0] == '"' {
+ if v, err := strconv.Unquote(value); err == nil {
+ value = v
+
+ quoted = true
+ } else {
+ return nil, &IniError{
+ Message: err.Error(),
+ File: filename,
+ LineNumber: lineno,
+ }
+ }
+ }
+
+ section = append(section, iniValue{
+ Name: name,
+ Value: value,
+ Quoted: quoted,
+ LineNumber: lineno,
+ })
+
+ ret.Sections[sectionname] = section
+ }
+
+ return ret, nil
+}
+
+func (i *IniParser) matchingGroups(name string) []*Group {
+ if len(name) == 0 {
+ var ret []*Group
+
+ i.parser.eachGroup(func(g *Group) {
+ ret = append(ret, g)
+ })
+
+ return ret
+ }
+
+ g := i.parser.groupByName(name)
+
+ if g != nil {
+ return []*Group{g}
+ }
+
+ return nil
+}
+
+func (i *IniParser) parse(ini *ini) error {
+ p := i.parser
+
+ var quotesLookup = make(map[*Option]bool)
+
+ for name, section := range ini.Sections {
+ groups := i.matchingGroups(name)
+
+ if len(groups) == 0 {
+ return newErrorf(ErrUnknownGroup, "could not find option group `%s'", name)
+ }
+
+ for _, inival := range section {
+ var opt *Option
+
+ for _, group := range groups {
+ opt = group.optionByName(inival.Name, func(o *Option, n string) bool {
+ return strings.ToLower(o.tag.Get("ini-name")) == strings.ToLower(n)
+ })
+
+ if opt != nil && len(opt.tag.Get("no-ini")) != 0 {
+ opt = nil
+ }
+
+ if opt != nil {
+ break
+ }
+ }
+
+ if opt == nil {
+ if (p.Options & IgnoreUnknown) == None {
+ return &IniError{
+ Message: fmt.Sprintf("unknown option: %s", inival.Name),
+ File: ini.File,
+ LineNumber: inival.LineNumber,
+ }
+ }
+
+ continue
+ }
+
+ // ini value is ignored if override is set and
+ // value was previously set from non default
+ if i.ParseAsDefaults && !opt.isSetDefault {
+ continue
+ }
+
+ pval := &inival.Value
+
+ if !opt.canArgument() && len(inival.Value) == 0 {
+ pval = nil
+ } else {
+ if opt.value.Type().Kind() == reflect.Map {
+ parts := strings.SplitN(inival.Value, ":", 2)
+
+ // only handle unquoting
+ if len(parts) == 2 && parts[1][0] == '"' {
+ if v, err := strconv.Unquote(parts[1]); err == nil {
+ parts[1] = v
+
+ inival.Quoted = true
+ } else {
+ return &IniError{
+ Message: err.Error(),
+ File: ini.File,
+ LineNumber: inival.LineNumber,
+ }
+ }
+
+ s := parts[0] + ":" + parts[1]
+
+ pval = &s
+ }
+ }
+ }
+
+ if err := opt.set(pval); err != nil {
+ return &IniError{
+ Message: err.Error(),
+ File: ini.File,
+ LineNumber: inival.LineNumber,
+ }
+ }
+
+ // either all INI values are quoted or only values who need quoting
+ if _, ok := quotesLookup[opt]; !inival.Quoted || !ok {
+ quotesLookup[opt] = inival.Quoted
+ }
+
+ opt.tag.Set("_read-ini-name", inival.Name)
+ }
+ }
+
+ for opt, quoted := range quotesLookup {
+ opt.iniQuote = quoted
+ }
+
+ return nil
+}
diff --git a/vendor/github.com/jessevdk/go-flags/man.go b/vendor/github.com/jessevdk/go-flags/man.go
new file mode 100644
index 0000000..0cb114e
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/man.go
@@ -0,0 +1,205 @@
+package flags
+
+import (
+ "fmt"
+ "io"
+ "runtime"
+ "strings"
+ "time"
+)
+
+func manQuote(s string) string {
+ return strings.Replace(s, "\\", "\\\\", -1)
+}
+
+func formatForMan(wr io.Writer, s string) {
+ for {
+ idx := strings.IndexRune(s, '`')
+
+ if idx < 0 {
+ fmt.Fprintf(wr, "%s", manQuote(s))
+ break
+ }
+
+ fmt.Fprintf(wr, "%s", manQuote(s[:idx]))
+
+ s = s[idx+1:]
+ idx = strings.IndexRune(s, '\'')
+
+ if idx < 0 {
+ fmt.Fprintf(wr, "%s", manQuote(s))
+ break
+ }
+
+ fmt.Fprintf(wr, "\\fB%s\\fP", manQuote(s[:idx]))
+ s = s[idx+1:]
+ }
+}
+
+func writeManPageOptions(wr io.Writer, grp *Group) {
+ grp.eachGroup(func(group *Group) {
+ if group.Hidden || len(group.options) == 0 {
+ return
+ }
+
+ // If the parent (grp) has any subgroups, display their descriptions as
+ // subsection headers similar to the output of --help.
+ if group.ShortDescription != "" && len(grp.groups) > 0 {
+ fmt.Fprintf(wr, ".SS %s\n", group.ShortDescription)
+
+ if group.LongDescription != "" {
+ formatForMan(wr, group.LongDescription)
+ fmt.Fprintln(wr, "")
+ }
+ }
+
+ for _, opt := range group.options {
+ if !opt.canCli() || opt.Hidden {
+ continue
+ }
+
+ fmt.Fprintln(wr, ".TP")
+ fmt.Fprintf(wr, "\\fB")
+
+ if opt.ShortName != 0 {
+ fmt.Fprintf(wr, "\\fB\\-%c\\fR", opt.ShortName)
+ }
+
+ if len(opt.LongName) != 0 {
+ if opt.ShortName != 0 {
+ fmt.Fprintf(wr, ", ")
+ }
+
+ fmt.Fprintf(wr, "\\fB\\-\\-%s\\fR", manQuote(opt.LongNameWithNamespace()))
+ }
+
+ if len(opt.ValueName) != 0 || opt.OptionalArgument {
+ if opt.OptionalArgument {
+ fmt.Fprintf(wr, " [\\fI%s=%s\\fR]", manQuote(opt.ValueName), manQuote(strings.Join(quoteV(opt.OptionalValue), ", ")))
+ } else {
+ fmt.Fprintf(wr, " \\fI%s\\fR", manQuote(opt.ValueName))
+ }
+ }
+
+ if len(opt.Default) != 0 {
+ fmt.Fprintf(wr, " <default: \\fI%s\\fR>", manQuote(strings.Join(quoteV(opt.Default), ", ")))
+ } else if len(opt.EnvDefaultKey) != 0 {
+ if runtime.GOOS == "windows" {
+ fmt.Fprintf(wr, " <default: \\fI%%%s%%\\fR>", manQuote(opt.EnvDefaultKey))
+ } else {
+ fmt.Fprintf(wr, " <default: \\fI$%s\\fR>", manQuote(opt.EnvDefaultKey))
+ }
+ }
+
+ if opt.Required {
+ fmt.Fprintf(wr, " (\\fIrequired\\fR)")
+ }
+
+ fmt.Fprintln(wr, "\\fP")
+
+ if len(opt.Description) != 0 {
+ formatForMan(wr, opt.Description)
+ fmt.Fprintln(wr, "")
+ }
+ }
+ })
+}
+
+func writeManPageSubcommands(wr io.Writer, name string, root *Command) {
+ commands := root.sortedVisibleCommands()
+
+ for _, c := range commands {
+ var nn string
+
+ if c.Hidden {
+ continue
+ }
+
+ if len(name) != 0 {
+ nn = name + " " + c.Name
+ } else {
+ nn = c.Name
+ }
+
+ writeManPageCommand(wr, nn, root, c)
+ }
+}
+
+func writeManPageCommand(wr io.Writer, name string, root *Command, command *Command) {
+ fmt.Fprintf(wr, ".SS %s\n", name)
+ fmt.Fprintln(wr, command.ShortDescription)
+
+ if len(command.LongDescription) > 0 {
+ fmt.Fprintln(wr, "")
+
+ cmdstart := fmt.Sprintf("The %s command", manQuote(command.Name))
+
+ if strings.HasPrefix(command.LongDescription, cmdstart) {
+ fmt.Fprintf(wr, "The \\fI%s\\fP command", manQuote(command.Name))
+
+ formatForMan(wr, command.LongDescription[len(cmdstart):])
+ fmt.Fprintln(wr, "")
+ } else {
+ formatForMan(wr, command.LongDescription)
+ fmt.Fprintln(wr, "")
+ }
+ }
+
+ var usage string
+ if us, ok := command.data.(Usage); ok {
+ usage = us.Usage()
+ } else if command.hasCliOptions() {
+ usage = fmt.Sprintf("[%s-OPTIONS]", command.Name)
+ }
+
+ var pre string
+ if root.hasCliOptions() {
+ pre = fmt.Sprintf("%s [OPTIONS] %s", root.Name, command.Name)
+ } else {
+ pre = fmt.Sprintf("%s %s", root.Name, command.Name)
+ }
+
+ if len(usage) > 0 {
+ fmt.Fprintf(wr, "\n\\fBUsage\\fP: %s %s\n.TP\n", manQuote(pre), manQuote(usage))
+ }
+
+ if len(command.Aliases) > 0 {
+ fmt.Fprintf(wr, "\n\\fBAliases\\fP: %s\n\n", manQuote(strings.Join(command.Aliases, ", ")))
+ }
+
+ writeManPageOptions(wr, command.Group)
+ writeManPageSubcommands(wr, name, command)
+}
+
+// WriteManPage writes a basic man page in groff format to the specified
+// writer.
+func (p *Parser) WriteManPage(wr io.Writer) {
+ t := time.Now()
+
+ fmt.Fprintf(wr, ".TH %s 1 \"%s\"\n", manQuote(p.Name), t.Format("2 January 2006"))
+ fmt.Fprintln(wr, ".SH NAME")
+ fmt.Fprintf(wr, "%s \\- %s\n", manQuote(p.Name), manQuote(p.ShortDescription))
+ fmt.Fprintln(wr, ".SH SYNOPSIS")
+
+ usage := p.Usage
+
+ if len(usage) == 0 {
+ usage = "[OPTIONS]"
+ }
+
+ fmt.Fprintf(wr, "\\fB%s\\fP %s\n", manQuote(p.Name), manQuote(usage))
+ fmt.Fprintln(wr, ".SH DESCRIPTION")
+
+ formatForMan(wr, p.LongDescription)
+ fmt.Fprintln(wr, "")
+
+ fmt.Fprintln(wr, ".SH OPTIONS")
+
+ writeManPageOptions(wr, p.Command.Group)
+
+ if len(p.visibleCommands()) > 0 {
+ fmt.Fprintln(wr, ".SH COMMANDS")
+
+ writeManPageSubcommands(wr, "", p.Command)
+ }
+}
diff --git a/vendor/github.com/jessevdk/go-flags/multitag.go b/vendor/github.com/jessevdk/go-flags/multitag.go
new file mode 100644
index 0000000..96bb1a3
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/multitag.go
@@ -0,0 +1,140 @@
+package flags
+
+import (
+ "strconv"
+)
+
+type multiTag struct {
+ value string
+ cache map[string][]string
+}
+
+func newMultiTag(v string) multiTag {
+ return multiTag{
+ value: v,
+ }
+}
+
+func (x *multiTag) scan() (map[string][]string, error) {
+ v := x.value
+
+ ret := make(map[string][]string)
+
+ // This is mostly copied from reflect.StructTag.Get
+ for v != "" {
+ i := 0
+
+ // Skip whitespace
+ for i < len(v) && v[i] == ' ' {
+ i++
+ }
+
+ v = v[i:]
+
+ if v == "" {
+ break
+ }
+
+ // Scan to colon to find key
+ i = 0
+
+ for i < len(v) && v[i] != ' ' && v[i] != ':' && v[i] != '"' {
+ i++
+ }
+
+ if i >= len(v) {
+ return nil, newErrorf(ErrTag, "expected `:' after key name, but got end of tag (in `%v`)", x.value)
+ }
+
+ if v[i] != ':' {
+ return nil, newErrorf(ErrTag, "expected `:' after key name, but got `%v' (in `%v`)", v[i], x.value)
+ }
+
+ if i+1 >= len(v) {
+ return nil, newErrorf(ErrTag, "expected `\"' to start tag value at end of tag (in `%v`)", x.value)
+ }
+
+ if v[i+1] != '"' {
+ return nil, newErrorf(ErrTag, "expected `\"' to start tag value, but got `%v' (in `%v`)", v[i+1], x.value)
+ }
+
+ name := v[:i]
+ v = v[i+1:]
+
+ // Scan quoted string to find value
+ i = 1
+
+ for i < len(v) && v[i] != '"' {
+ if v[i] == '\n' {
+ return nil, newErrorf(ErrTag, "unexpected newline in tag value `%v' (in `%v`)", name, x.value)
+ }
+
+ if v[i] == '\\' {
+ i++
+ }
+ i++
+ }
+
+ if i >= len(v) {
+ return nil, newErrorf(ErrTag, "expected end of tag value `\"' at end of tag (in `%v`)", x.value)
+ }
+
+ val, err := strconv.Unquote(v[:i+1])
+
+ if err != nil {
+ return nil, newErrorf(ErrTag, "Malformed value of tag `%v:%v` => %v (in `%v`)", name, v[:i+1], err, x.value)
+ }
+
+ v = v[i+1:]
+
+ ret[name] = append(ret[name], val)
+ }
+
+ return ret, nil
+}
+
+func (x *multiTag) Parse() error {
+ vals, err := x.scan()
+ x.cache = vals
+
+ return err
+}
+
+func (x *multiTag) cached() map[string][]string {
+ if x.cache == nil {
+ cache, _ := x.scan()
+
+ if cache == nil {
+ cache = make(map[string][]string)
+ }
+
+ x.cache = cache
+ }
+
+ return x.cache
+}
+
+func (x *multiTag) Get(key string) string {
+ c := x.cached()
+
+ if v, ok := c[key]; ok {
+ return v[len(v)-1]
+ }
+
+ return ""
+}
+
+func (x *multiTag) GetMany(key string) []string {
+ c := x.cached()
+ return c[key]
+}
+
+func (x *multiTag) Set(key string, value string) {
+ c := x.cached()
+ c[key] = []string{value}
+}
+
+func (x *multiTag) SetMany(key string, value []string) {
+ c := x.cached()
+ c[key] = value
+}
diff --git a/vendor/github.com/jessevdk/go-flags/option.go b/vendor/github.com/jessevdk/go-flags/option.go
new file mode 100644
index 0000000..5f85250
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/option.go
@@ -0,0 +1,459 @@
+package flags
+
+import (
+ "bytes"
+ "fmt"
+ "os"
+ "reflect"
+ "strings"
+ "unicode/utf8"
+)
+
+// Option flag information. Contains a description of the option, short and
+// long name as well as a default value and whether an argument for this
+// flag is optional.
+type Option struct {
+ // The description of the option flag. This description is shown
+ // automatically in the built-in help.
+ Description string
+
+ // The short name of the option (a single character). If not 0, the
+ // option flag can be 'activated' using -<ShortName>. Either ShortName
+ // or LongName needs to be non-empty.
+ ShortName rune
+
+ // The long name of the option. If not "", the option flag can be
+ // activated using --<LongName>. Either ShortName or LongName needs
+ // to be non-empty.
+ LongName string
+
+ // The default value of the option.
+ Default []string
+
+ // The optional environment default value key name.
+ EnvDefaultKey string
+
+ // The optional delimiter string for EnvDefaultKey values.
+ EnvDefaultDelim string
+
+ // If true, specifies that the argument to an option flag is optional.
+ // When no argument to the flag is specified on the command line, the
+ // value of OptionalValue will be set in the field this option represents.
+ // This is only valid for non-boolean options.
+ OptionalArgument bool
+
+ // The optional value of the option. The optional value is used when
+ // the option flag is marked as having an OptionalArgument. This means
+ // that when the flag is specified, but no option argument is given,
+ // the value of the field this option represents will be set to
+ // OptionalValue. This is only valid for non-boolean options.
+ OptionalValue []string
+
+ // If true, the option _must_ be specified on the command line. If the
+ // option is not specified, the parser will generate an ErrRequired type
+ // error.
+ Required bool
+
+ // A name for the value of an option shown in the Help as --flag [ValueName]
+ ValueName string
+
+ // A mask value to show in the help instead of the default value. This
+ // is useful for hiding sensitive information in the help, such as
+ // passwords.
+ DefaultMask string
+
+ // If non empty, only a certain set of values is allowed for an option.
+ Choices []string
+
+ // If true, the option is not displayed in the help or man page
+ Hidden bool
+
+ // The group which the option belongs to
+ group *Group
+
+ // The struct field which the option represents.
+ field reflect.StructField
+
+ // The struct field value which the option represents.
+ value reflect.Value
+
+ // Determines if the option will be always quoted in the INI output
+ iniQuote bool
+
+ tag multiTag
+ isSet bool
+ isSetDefault bool
+ preventDefault bool
+
+ defaultLiteral string
+}
+
+// LongNameWithNamespace returns the option's long name with the group namespaces
+// prepended by walking up the option's group tree. Namespaces and the long name
+// itself are separated by the parser's namespace delimiter. If the long name is
+// empty an empty string is returned.
+func (option *Option) LongNameWithNamespace() string {
+ if len(option.LongName) == 0 {
+ return ""
+ }
+
+ // fetch the namespace delimiter from the parser which is always at the
+ // end of the group hierarchy
+ namespaceDelimiter := ""
+ g := option.group
+
+ for {
+ if p, ok := g.parent.(*Parser); ok {
+ namespaceDelimiter = p.NamespaceDelimiter
+
+ break
+ }
+
+ switch i := g.parent.(type) {
+ case *Command:
+ g = i.Group
+ case *Group:
+ g = i
+ }
+ }
+
+ // concatenate long name with namespace
+ longName := option.LongName
+ g = option.group
+
+ for g != nil {
+ if g.Namespace != "" {
+ longName = g.Namespace + namespaceDelimiter + longName
+ }
+
+ switch i := g.parent.(type) {
+ case *Command:
+ g = i.Group
+ case *Group:
+ g = i
+ case *Parser:
+ g = nil
+ }
+ }
+
+ return longName
+}
+
+// String converts an option to a human friendly readable string describing the
+// option.
+func (option *Option) String() string {
+ var s string
+ var short string
+
+ if option.ShortName != 0 {
+ data := make([]byte, utf8.RuneLen(option.ShortName))
+ utf8.EncodeRune(data, option.ShortName)
+ short = string(data)
+
+ if len(option.LongName) != 0 {
+ s = fmt.Sprintf("%s%s, %s%s",
+ string(defaultShortOptDelimiter), short,
+ defaultLongOptDelimiter, option.LongNameWithNamespace())
+ } else {
+ s = fmt.Sprintf("%s%s", string(defaultShortOptDelimiter), short)
+ }
+ } else if len(option.LongName) != 0 {
+ s = fmt.Sprintf("%s%s", defaultLongOptDelimiter, option.LongNameWithNamespace())
+ }
+
+ return s
+}
+
+// Value returns the option value as an interface{}.
+func (option *Option) Value() interface{} {
+ return option.value.Interface()
+}
+
+// Field returns the reflect struct field of the option.
+func (option *Option) Field() reflect.StructField {
+ return option.field
+}
+
+// IsSet returns true if option has been set
+func (option *Option) IsSet() bool {
+ return option.isSet
+}
+
+// IsSetDefault returns true if option has been set via the default option tag
+func (option *Option) IsSetDefault() bool {
+ return option.isSetDefault
+}
+
+// Set the value of an option to the specified value. An error will be returned
+// if the specified value could not be converted to the corresponding option
+// value type.
+func (option *Option) set(value *string) error {
+ kind := option.value.Type().Kind()
+
+ if (kind == reflect.Map || kind == reflect.Slice) && !option.isSet {
+ option.empty()
+ }
+
+ option.isSet = true
+ option.preventDefault = true
+
+ if len(option.Choices) != 0 {
+ found := false
+
+ for _, choice := range option.Choices {
+ if choice == *value {
+ found = true
+ break
+ }
+ }
+
+ if !found {
+ allowed := strings.Join(option.Choices[0:len(option.Choices)-1], ", ")
+
+ if len(option.Choices) > 1 {
+ allowed += " or " + option.Choices[len(option.Choices)-1]
+ }
+
+ return newErrorf(ErrInvalidChoice,
+ "Invalid value `%s' for option `%s'. Allowed values are: %s",
+ *value, option, allowed)
+ }
+ }
+
+ if option.isFunc() {
+ return option.call(value)
+ } else if value != nil {
+ return convert(*value, option.value, option.tag)
+ }
+
+ return convert("", option.value, option.tag)
+}
+
+func (option *Option) canCli() bool {
+ return option.ShortName != 0 || len(option.LongName) != 0
+}
+
+func (option *Option) canArgument() bool {
+ if u := option.isUnmarshaler(); u != nil {
+ return true
+ }
+
+ return !option.isBool()
+}
+
+func (option *Option) emptyValue() reflect.Value {
+ tp := option.value.Type()
+
+ if tp.Kind() == reflect.Map {
+ return reflect.MakeMap(tp)
+ }
+
+ return reflect.Zero(tp)
+}
+
+func (option *Option) empty() {
+ if !option.isFunc() {
+ option.value.Set(option.emptyValue())
+ }
+}
+
+func (option *Option) clearDefault() {
+ usedDefault := option.Default
+
+ if envKey := option.EnvDefaultKey; envKey != "" {
+ if value, ok := os.LookupEnv(envKey); ok {
+ if option.EnvDefaultDelim != "" {
+ usedDefault = strings.Split(value,
+ option.EnvDefaultDelim)
+ } else {
+ usedDefault = []string{value}
+ }
+ }
+ }
+
+ option.isSetDefault = true
+
+ if len(usedDefault) > 0 {
+ option.empty()
+
+ for _, d := range usedDefault {
+ option.set(&d)
+ option.isSetDefault = true
+ }
+ } else {
+ tp := option.value.Type()
+
+ switch tp.Kind() {
+ case reflect.Map:
+ if option.value.IsNil() {
+ option.empty()
+ }
+ case reflect.Slice:
+ if option.value.IsNil() {
+ option.empty()
+ }
+ }
+ }
+}
+
+func (option *Option) valueIsDefault() bool {
+ // Check if the value of the option corresponds to its
+ // default value
+ emptyval := option.emptyValue()
+
+ checkvalptr := reflect.New(emptyval.Type())
+ checkval := reflect.Indirect(checkvalptr)
+
+ checkval.Set(emptyval)
+
+ if len(option.Default) != 0 {
+ for _, v := range option.Default {
+ convert(v, checkval, option.tag)
+ }
+ }
+
+ return reflect.DeepEqual(option.value.Interface(), checkval.Interface())
+}
+
+func (option *Option) isUnmarshaler() Unmarshaler {
+ v := option.value
+
+ for {
+ if !v.CanInterface() {
+ break
+ }
+
+ i := v.Interface()
+
+ if u, ok := i.(Unmarshaler); ok {
+ return u
+ }
+
+ if !v.CanAddr() {
+ break
+ }
+
+ v = v.Addr()
+ }
+
+ return nil
+}
+
+func (option *Option) isBool() bool {
+ tp := option.value.Type()
+
+ for {
+ switch tp.Kind() {
+ case reflect.Slice, reflect.Ptr:
+ tp = tp.Elem()
+ case reflect.Bool:
+ return true
+ case reflect.Func:
+ return tp.NumIn() == 0
+ default:
+ return false
+ }
+ }
+}
+
+func (option *Option) isSignedNumber() bool {
+ tp := option.value.Type()
+
+ for {
+ switch tp.Kind() {
+ case reflect.Slice, reflect.Ptr:
+ tp = tp.Elem()
+ case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Float32, reflect.Float64:
+ return true
+ default:
+ return false
+ }
+ }
+}
+
+func (option *Option) isFunc() bool {
+ return option.value.Type().Kind() == reflect.Func
+}
+
+func (option *Option) call(value *string) error {
+ var retval []reflect.Value
+
+ if value == nil {
+ retval = option.value.Call(nil)
+ } else {
+ tp := option.value.Type().In(0)
+
+ val := reflect.New(tp)
+ val = reflect.Indirect(val)
+
+ if err := convert(*value, val, option.tag); err != nil {
+ return err
+ }
+
+ retval = option.value.Call([]reflect.Value{val})
+ }
+
+ if len(retval) == 1 && retval[0].Type() == reflect.TypeOf((*error)(nil)).Elem() {
+ if retval[0].Interface() == nil {
+ return nil
+ }
+
+ return retval[0].Interface().(error)
+ }
+
+ return nil
+}
+
+func (option *Option) updateDefaultLiteral() {
+ defs := option.Default
+ def := ""
+
+ if len(defs) == 0 && option.canArgument() {
+ var showdef bool
+
+ switch option.field.Type.Kind() {
+ case reflect.Func, reflect.Ptr:
+ showdef = !option.value.IsNil()
+ case reflect.Slice, reflect.String, reflect.Array:
+ showdef = option.value.Len() > 0
+ case reflect.Map:
+ showdef = !option.value.IsNil() && option.value.Len() > 0
+ default:
+ zeroval := reflect.Zero(option.field.Type)
+ showdef = !reflect.DeepEqual(zeroval.Interface(), option.value.Interface())
+ }
+
+ if showdef {
+ def, _ = convertToString(option.value, option.tag)
+ }
+ } else if len(defs) != 0 {
+ l := len(defs) - 1
+
+ for i := 0; i < l; i++ {
+ def += quoteIfNeeded(defs[i]) + ", "
+ }
+
+ def += quoteIfNeeded(defs[l])
+ }
+
+ option.defaultLiteral = def
+}
+
+func (option *Option) shortAndLongName() string {
+ ret := &bytes.Buffer{}
+
+ if option.ShortName != 0 {
+ ret.WriteRune(defaultShortOptDelimiter)
+ ret.WriteRune(option.ShortName)
+ }
+
+ if len(option.LongName) != 0 {
+ if option.ShortName != 0 {
+ ret.WriteRune('/')
+ }
+
+ ret.WriteString(option.LongName)
+ }
+
+ return ret.String()
+}
diff --git a/vendor/github.com/jessevdk/go-flags/optstyle_other.go b/vendor/github.com/jessevdk/go-flags/optstyle_other.go
new file mode 100644
index 0000000..56dfdae
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/optstyle_other.go
@@ -0,0 +1,67 @@
+// +build !windows forceposix
+
+package flags
+
+import (
+ "strings"
+)
+
+const (
+ defaultShortOptDelimiter = '-'
+ defaultLongOptDelimiter = "--"
+ defaultNameArgDelimiter = '='
+)
+
+func argumentStartsOption(arg string) bool {
+ return len(arg) > 0 && arg[0] == '-'
+}
+
+func argumentIsOption(arg string) bool {
+ if len(arg) > 1 && arg[0] == '-' && arg[1] != '-' {
+ return true
+ }
+
+ if len(arg) > 2 && arg[0] == '-' && arg[1] == '-' && arg[2] != '-' {
+ return true
+ }
+
+ return false
+}
+
+// stripOptionPrefix returns the option without the prefix and whether or
+// not the option is a long option or not.
+func stripOptionPrefix(optname string) (prefix string, name string, islong bool) {
+ if strings.HasPrefix(optname, "--") {
+ return "--", optname[2:], true
+ } else if strings.HasPrefix(optname, "-") {
+ return "-", optname[1:], false
+ }
+
+ return "", optname, false
+}
+
+// splitOption attempts to split the passed option into a name and an argument.
+// When there is no argument specified, nil will be returned for it.
+func splitOption(prefix string, option string, islong bool) (string, string, *string) {
+ pos := strings.Index(option, "=")
+
+ if (islong && pos >= 0) || (!islong && pos == 1) {
+ rest := option[pos+1:]
+ return option[:pos], "=", &rest
+ }
+
+ return option, "", nil
+}
+
+// addHelpGroup adds a new group that contains default help parameters.
+func (c *Command) addHelpGroup(showHelp func() error) *Group {
+ var help struct {
+ ShowHelp func() error `short:"h" long:"help" description:"Show this help message"`
+ }
+
+ help.ShowHelp = showHelp
+ ret, _ := c.AddGroup("Help Options", "", &help)
+ ret.isBuiltinHelp = true
+
+ return ret
+}
diff --git a/vendor/github.com/jessevdk/go-flags/optstyle_windows.go b/vendor/github.com/jessevdk/go-flags/optstyle_windows.go
new file mode 100644
index 0000000..f3f28ae
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/optstyle_windows.go
@@ -0,0 +1,108 @@
+// +build !forceposix
+
+package flags
+
+import (
+ "strings"
+)
+
+// Windows uses a front slash for both short and long options. Also it uses
+// a colon for name/argument delimter.
+const (
+ defaultShortOptDelimiter = '/'
+ defaultLongOptDelimiter = "/"
+ defaultNameArgDelimiter = ':'
+)
+
+func argumentStartsOption(arg string) bool {
+ return len(arg) > 0 && (arg[0] == '-' || arg[0] == '/')
+}
+
+func argumentIsOption(arg string) bool {
+ // Windows-style options allow front slash for the option
+ // delimiter.
+ if len(arg) > 1 && arg[0] == '/' {
+ return true
+ }
+
+ if len(arg) > 1 && arg[0] == '-' && arg[1] != '-' {
+ return true
+ }
+
+ if len(arg) > 2 && arg[0] == '-' && arg[1] == '-' && arg[2] != '-' {
+ return true
+ }
+
+ return false
+}
+
+// stripOptionPrefix returns the option without the prefix and whether or
+// not the option is a long option or not.
+func stripOptionPrefix(optname string) (prefix string, name string, islong bool) {
+ // Determine if the argument is a long option or not. Windows
+ // typically supports both long and short options with a single
+ // front slash as the option delimiter, so handle this situation
+ // nicely.
+ possplit := 0
+
+ if strings.HasPrefix(optname, "--") {
+ possplit = 2
+ islong = true
+ } else if strings.HasPrefix(optname, "-") {
+ possplit = 1
+ islong = false
+ } else if strings.HasPrefix(optname, "/") {
+ possplit = 1
+ islong = len(optname) > 2
+ }
+
+ return optname[:possplit], optname[possplit:], islong
+}
+
+// splitOption attempts to split the passed option into a name and an argument.
+// When there is no argument specified, nil will be returned for it.
+func splitOption(prefix string, option string, islong bool) (string, string, *string) {
+ if len(option) == 0 {
+ return option, "", nil
+ }
+
+ // Windows typically uses a colon for the option name and argument
+ // delimiter while POSIX typically uses an equals. Support both styles,
+ // but don't allow the two to be mixed. That is to say /foo:bar and
+ // --foo=bar are acceptable, but /foo=bar and --foo:bar are not.
+ var pos int
+ var sp string
+
+ if prefix == "/" {
+ sp = ":"
+ pos = strings.Index(option, sp)
+ } else if len(prefix) > 0 {
+ sp = "="
+ pos = strings.Index(option, sp)
+ }
+
+ if (islong && pos >= 0) || (!islong && pos == 1) {
+ rest := option[pos+1:]
+ return option[:pos], sp, &rest
+ }
+
+ return option, "", nil
+}
+
+// addHelpGroup adds a new group that contains default help parameters.
+func (c *Command) addHelpGroup(showHelp func() error) *Group {
+ // Windows CLI applications typically use /? for help, so make both
+ // that available as well as the POSIX style h and help.
+ var help struct {
+ ShowHelpWindows func() error `short:"?" description:"Show this help message"`
+ ShowHelpPosix func() error `short:"h" long:"help" description:"Show this help message"`
+ }
+
+ help.ShowHelpWindows = showHelp
+ help.ShowHelpPosix = showHelp
+
+ ret, _ := c.AddGroup("Help Options", "", &help)
+ ret.isBuiltinHelp = true
+
+ return ret
+}
diff --git a/vendor/github.com/jessevdk/go-flags/parser.go b/vendor/github.com/jessevdk/go-flags/parser.go
new file mode 100644
index 0000000..0a7922a
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/parser.go
@@ -0,0 +1,700 @@
+// Copyright 2012 Jesse van den Kieboom. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package flags
+
+import (
+ "bytes"
+ "fmt"
+ "os"
+ "path"
+ "sort"
+ "strings"
+ "unicode/utf8"
+)
+
+// A Parser provides command line option parsing. It can contain several
+// option groups each with their own set of options.
+type Parser struct {
+ // Embedded, see Command for more information
+ *Command
+
+ // A usage string to be displayed in the help message.
+ Usage string
+
+ // Option flags changing the behavior of the parser.
+ Options Options
+
+ // NamespaceDelimiter separates group namespaces and option long names
+ NamespaceDelimiter string
+
+ // UnknownOptionsHandler is a function which gets called when the parser
+ // encounters an unknown option. The function receives the unknown option
+ // name, a SplitArgument which specifies its value if set with an argument
+ // separator, and the remaining command line arguments.
+ // It should return a new list of remaining arguments to continue parsing,
+ // or an error to indicate a parse failure.
+ UnknownOptionHandler func(option string, arg SplitArgument, args []string) ([]string, error)
+
+ // CompletionHandler is a function gets called to handle the completion of
+ // items. By default, the items are printed and the application is exited.
+ // You can override this default behavior by specifying a custom CompletionHandler.
+ CompletionHandler func(items []Completion)
+
+ // CommandHandler is a function that gets called to handle execution of a
+ // command. By default, the command will simply be executed. This can be
+ // overridden to perform certain actions (such as applying global flags)
+ // just before the command is executed. Note that if you override the
+ // handler it is your responsibility to call the command.Execute function.
+ //
+ // The command passed into CommandHandler may be nil in case there is no
+ // command to be executed when parsing has finished.
+ CommandHandler func(command Commander, args []string) error
+
+ internalError error
+}
+
+// SplitArgument represents the argument value of an option that was passed using
+// an argument separator.
+type SplitArgument interface {
+ // String returns the option's value as a string, and a boolean indicating
+ // if the option was present.
+ Value() (string, bool)
+}
+
+type strArgument struct {
+ value *string
+}
+
+func (s strArgument) Value() (string, bool) {
+ if s.value == nil {
+ return "", false
+ }
+
+ return *s.value, true
+}
+
+// Options provides parser options that change the behavior of the option
+// parser.
+type Options uint
+
+const (
+ // None indicates no options.
+ None Options = 0
+
+ // HelpFlag adds a default Help Options group to the parser containing
+ // -h and --help options. When either -h or --help is specified on the
+ // command line, the parser will return the special error of type
+ // ErrHelp. When PrintErrors is also specified, then the help message
+ // will also be automatically printed to os.Stdout.
+ HelpFlag = 1 << iota
+
+ // PassDoubleDash passes all arguments after a double dash, --, as
+ // remaining command line arguments (i.e. they will not be parsed for
+ // flags).
+ PassDoubleDash
+
+ // IgnoreUnknown ignores any unknown options and passes them as
+ // remaining command line arguments instead of generating an error.
+ IgnoreUnknown
+
+ // PrintErrors prints any errors which occurred during parsing to
+ // os.Stderr. In the special case of ErrHelp, the message will be printed
+ // to os.Stdout.
+ PrintErrors
+
+ // PassAfterNonOption passes all arguments after the first non option
+ // as remaining command line arguments. This is equivalent to strict
+ // POSIX processing.
+ PassAfterNonOption
+
+ // Default is a convenient default set of options which should cover
+ // most of the uses of the flags package.
+ Default = HelpFlag | PrintErrors | PassDoubleDash
+)
+
+type parseState struct {
+ arg string
+ args []string
+ retargs []string
+ positional []*Arg
+ err error
+
+ command *Command
+ lookup lookup
+}
+
+// Parse is a convenience function to parse command line options with default
+// settings. The provided data is a pointer to a struct representing the
+// default option group (named "Application Options"). For more control, use
+// flags.NewParser.
+func Parse(data interface{}) ([]string, error) {
+ return NewParser(data, Default).Parse()
+}
+
+// ParseArgs is a convenience function to parse command line options with default
+// settings. The provided data is a pointer to a struct representing the
+// default option group (named "Application Options"). The args argument is
+// the list of command line arguments to parse. If you just want to parse the
+// default program command line arguments (i.e. os.Args), then use flags.Parse
+// instead. For more control, use flags.NewParser.
+func ParseArgs(data interface{}, args []string) ([]string, error) {
+ return NewParser(data, Default).ParseArgs(args)
+}
+
+// NewParser creates a new parser. It uses os.Args[0] as the application
+// name and then calls Parser.NewNamedParser (see Parser.NewNamedParser for
+// more details). The provided data is a pointer to a struct representing the
+// default option group (named "Application Options"), or nil if the default
+// group should not be added. The options parameter specifies a set of options
+// for the parser.
+func NewParser(data interface{}, options Options) *Parser {
+ p := NewNamedParser(path.Base(os.Args[0]), options)
+
+ if data != nil {
+ g, err := p.AddGroup("Application Options", "", data)
+
+ if err == nil {
+ g.parent = p
+ }
+
+ p.internalError = err
+ }
+
+ return p
+}
+
+// NewNamedParser creates a new parser. The appname is used to display the
+// executable name in the built-in help message. Option groups and commands can
+// be added to this parser by using AddGroup and AddCommand.
+func NewNamedParser(appname string, options Options) *Parser {
+ p := &Parser{
+ Command: newCommand(appname, "", "", nil),
+ Options: options,
+ NamespaceDelimiter: ".",
+ }
+
+ p.Command.parent = p
+
+ return p
+}
+
+// Parse parses the command line arguments from os.Args using Parser.ParseArgs.
+// For more detailed information see ParseArgs.
+func (p *Parser) Parse() ([]string, error) {
+ return p.ParseArgs(os.Args[1:])
+}
+
+// ParseArgs parses the command line arguments according to the option groups that
+// were added to the parser. On successful parsing of the arguments, the
+// remaining, non-option, arguments (if any) are returned. The returned error
+// indicates a parsing error and can be used with PrintError to display
+// contextual information on where the error occurred exactly.
+//
+// When the common help group has been added (AddHelp) and either -h or --help
+// was specified in the command line arguments, a help message will be
+// automatically printed if the PrintErrors option is enabled.
+// Furthermore, the special error type ErrHelp is returned.
+// It is up to the caller to exit the program if so desired.
+func (p *Parser) ParseArgs(args []string) ([]string, error) {
+ if p.internalError != nil {
+ return nil, p.internalError
+ }
+
+ p.eachOption(func(c *Command, g *Group, option *Option) {
+ option.isSet = false
+ option.isSetDefault = false
+ option.updateDefaultLiteral()
+ })
+
+ // Add built-in help group to all commands if necessary
+ if (p.Options & HelpFlag) != None {
+ p.addHelpGroups(p.showBuiltinHelp)
+ }
+
+ compval := os.Getenv("GO_FLAGS_COMPLETION")
+
+ if len(compval) != 0 {
+ comp := &completion{parser: p}
+ items := comp.complete(args)
+
+ if p.CompletionHandler != nil {
+ p.CompletionHandler(items)
+ } else {
+ comp.print(items, compval == "verbose")
+ os.Exit(0)
+ }
+
+ return nil, nil
+ }
+
+ s := &parseState{
+ args: args,
+ retargs: make([]string, 0, len(args)),
+ }
+
+ p.fillParseState(s)
+
+ for !s.eof() {
+ arg := s.pop()
+
+ // When PassDoubleDash is set and we encounter a --, then
+ // simply append all the rest as arguments and break out
+ if (p.Options&PassDoubleDash) != None && arg == "--" {
+ s.addArgs(s.args...)
+ break
+ }
+
+ if !argumentIsOption(arg) {
+ // Note: this also sets s.err, so we can just check for
+ // nil here and use s.err later
+ if p.parseNonOption(s) != nil {
+ break
+ }
+
+ continue
+ }
+
+ var err error
+
+ prefix, optname, islong := stripOptionPrefix(arg)
+ optname, _, argument := splitOption(prefix, optname, islong)
+
+ if islong {
+ err = p.parseLong(s, optname, argument)
+ } else {
+ err = p.parseShort(s, optname, argument)
+ }
+
+ if err != nil {
+ ignoreUnknown := (p.Options & IgnoreUnknown) != None
+ parseErr := wrapError(err)
+
+ if parseErr.Type != ErrUnknownFlag || (!ignoreUnknown && p.UnknownOptionHandler == nil) {
+ s.err = parseErr
+ break
+ }
+
+ if ignoreUnknown {
+ s.addArgs(arg)
+ } else if p.UnknownOptionHandler != nil {
+ modifiedArgs, err := p.UnknownOptionHandler(optname, strArgument{argument}, s.args)
+
+ if err != nil {
+ s.err = err
+ break
+ }
+
+ s.args = modifiedArgs
+ }
+ }
+ }
+
+ if s.err == nil {
+ p.eachOption(func(c *Command, g *Group, option *Option) {
+ if option.preventDefault {
+ return
+ }
+
+ option.clearDefault()
+ })
+
+ s.checkRequired(p)
+ }
+
+ var reterr error
+
+ if s.err != nil {
+ reterr = s.err
+ } else if len(s.command.commands) != 0 && !s.command.SubcommandsOptional {
+ reterr = s.estimateCommand()
+ } else if cmd, ok := s.command.data.(Commander); ok {
+ if p.CommandHandler != nil {
+ reterr = p.CommandHandler(cmd, s.retargs)
+ } else {
+ reterr = cmd.Execute(s.retargs)
+ }
+ } else if p.CommandHandler != nil {
+ reterr = p.CommandHandler(nil, s.retargs)
+ }
+
+ if reterr != nil {
+ var retargs []string
+
+ if ourErr, ok := reterr.(*Error); !ok || ourErr.Type != ErrHelp {
+ retargs = append([]string{s.arg}, s.args...)
+ } else {
+ retargs = s.args
+ }
+
+ return retargs, p.printError(reterr)
+ }
+
+ return s.retargs, nil
+}
+
+func (p *parseState) eof() bool {
+ return len(p.args) == 0
+}
+
+func (p *parseState) pop() string {
+ if p.eof() {
+ return ""
+ }
+
+ p.arg = p.args[0]
+ p.args = p.args[1:]
+
+ return p.arg
+}
+
+func (p *parseState) peek() string {
+ if p.eof() {
+ return ""
+ }
+
+ return p.args[0]
+}
+
+func (p *parseState) checkRequired(parser *Parser) error {
+ c := parser.Command
+
+ var required []*Option
+
+ for c != nil {
+ c.eachGroup(func(g *Group) {
+ for _, option := range g.options {
+ if !option.isSet && option.Required {
+ required = append(required, option)
+ }
+ }
+ })
+
+ c = c.Active
+ }
+
+ if len(required) == 0 {
+ if len(p.positional) > 0 {
+ var reqnames []string
+
+ for _, arg := range p.positional {
+ argRequired := (!arg.isRemaining() && p.command.ArgsRequired) || arg.Required != -1 || arg.RequiredMaximum != -1
+
+ if !argRequired {
+ continue
+ }
+
+ if arg.isRemaining() {
+ if arg.value.Len() < arg.Required {
+ var arguments string
+
+ if arg.Required > 1 {
+ arguments = "arguments, but got only " + fmt.Sprintf("%d", arg.value.Len())
+ } else {
+ arguments = "argument"
+ }
+
+ reqnames = append(reqnames, "`"+arg.Name+" (at least "+fmt.Sprintf("%d", arg.Required)+" "+arguments+")`")
+ } else if arg.RequiredMaximum != -1 && arg.value.Len() > arg.RequiredMaximum {
+ if arg.RequiredMaximum == 0 {
+ reqnames = append(reqnames, "`"+arg.Name+" (zero arguments)`")
+ } else {
+ var arguments string
+
+ if arg.RequiredMaximum > 1 {
+ arguments = "arguments, but got " + fmt.Sprintf("%d", arg.value.Len())
+ } else {
+ arguments = "argument"
+ }
+
+ reqnames = append(reqnames, "`"+arg.Name+" (at most "+fmt.Sprintf("%d", arg.RequiredMaximum)+" "+arguments+")`")
+ }
+ }
+ } else {
+ reqnames = append(reqnames, "`"+arg.Name+"`")
+ }
+ }
+
+ if len(reqnames) == 0 {
+ return nil
+ }
+
+ var msg string
+
+ if len(reqnames) == 1 {
+ msg = fmt.Sprintf("the required argument %s was not provided", reqnames[0])
+ } else {
+ msg = fmt.Sprintf("the required arguments %s and %s were not provided",
+ strings.Join(reqnames[:len(reqnames)-1], ", "), reqnames[len(reqnames)-1])
+ }
+
+ p.err = newError(ErrRequired, msg)
+ return p.err
+ }
+
+ return nil
+ }
+
+ names := make([]string, 0, len(required))
+
+ for _, k := range required {
+ names = append(names, "`"+k.String()+"'")
+ }
+
+ sort.Strings(names)
+
+ var msg string
+
+ if len(names) == 1 {
+ msg = fmt.Sprintf("the required flag %s was not specified", names[0])
+ } else {
+ msg = fmt.Sprintf("the required flags %s and %s were not specified",
+ strings.Join(names[:len(names)-1], ", "), names[len(names)-1])
+ }
+
+ p.err = newError(ErrRequired, msg)
+ return p.err
+}
+
+func (p *parseState) estimateCommand() error {
+ commands := p.command.sortedVisibleCommands()
+ cmdnames := make([]string, len(commands))
+
+ for i, v := range commands {
+ cmdnames[i] = v.Name
+ }
+
+ var msg string
+ var errtype ErrorType
+
+ if len(p.retargs) != 0 {
+ c, l := closestChoice(p.retargs[0], cmdnames)
+ msg = fmt.Sprintf("Unknown command `%s'", p.retargs[0])
+ errtype = ErrUnknownCommand
+
+ if float32(l)/float32(len(c)) < 0.5 {
+ msg = fmt.Sprintf("%s, did you mean `%s'?", msg, c)
+ } else if len(cmdnames) == 1 {
+ msg = fmt.Sprintf("%s. You should use the %s command",
+ msg,
+ cmdnames[0])
+ } else if len(cmdnames) > 1 {
+ msg = fmt.Sprintf("%s. Please specify one command of: %s or %s",
+ msg,
+ strings.Join(cmdnames[:len(cmdnames)-1], ", "),
+ cmdnames[len(cmdnames)-1])
+ }
+ } else {
+ errtype = ErrCommandRequired
+
+ if len(cmdnames) == 1 {
+ msg = fmt.Sprintf("Please specify the %s command", cmdnames[0])
+ } else if len(cmdnames) > 1 {
+ msg = fmt.Sprintf("Please specify one command of: %s or %s",
+ strings.Join(cmdnames[:len(cmdnames)-1], ", "),
+ cmdnames[len(cmdnames)-1])
+ }
+ }
+
+ return newError(errtype, msg)
+}
+
+func (p *Parser) parseOption(s *parseState, name string, option *Option, canarg bool, argument *string) (err error) {
+ if !option.canArgument() {
+ if argument != nil {
+ return newErrorf(ErrNoArgumentForBool, "bool flag `%s' cannot have an argument", option)
+ }
+
+ err = option.set(nil)
+ } else if argument != nil || (canarg && !s.eof()) {
+ var arg string
+
+ if argument != nil {
+ arg = *argument
+ } else {
+ arg = s.pop()
+
+ if argumentIsOption(arg) && !(option.isSignedNumber() && len(arg) > 1 && arg[0] == '-' && arg[1] >= '0' && arg[1] <= '9') {
+ return newErrorf(ErrExpectedArgument, "expected argument for flag `%s', but got option `%s'", option, arg)
+ } else if p.Options&PassDoubleDash != 0 && arg == "--" {
+ return newErrorf(ErrExpectedArgument, "expected argument for flag `%s', but got double dash `--'", option)
+ }
+ }
+
+ if option.tag.Get("unquote") != "false" {
+ arg, err = unquoteIfPossible(arg)
+ }
+
+ if err == nil {
+ err = option.set(&arg)
+ }
+ } else if option.OptionalArgument {
+ option.empty()
+
+ for _, v := range option.OptionalValue {
+ err = option.set(&v)
+
+ if err != nil {
+ break
+ }
+ }
+ } else {
+ err = newErrorf(ErrExpectedArgument, "expected argument for flag `%s'", option)
+ }
+
+ if err != nil {
+ if _, ok := err.(*Error); !ok {
+ err = newErrorf(ErrMarshal, "invalid argument for flag `%s' (expected %s): %s",
+ option,
+ option.value.Type(),
+ err.Error())
+ }
+ }
+
+ return err
+}
+
+func (p *Parser) parseLong(s *parseState, name string, argument *string) error {
+ if option := s.lookup.longNames[name]; option != nil {
+ // Only long options that are required can consume an argument
+ // from the argument list
+ canarg := !option.OptionalArgument
+
+ return p.parseOption(s, name, option, canarg, argument)
+ }
+
+ return newErrorf(ErrUnknownFlag, "unknown flag `%s'", name)
+}
+
+func (p *Parser) splitShortConcatArg(s *parseState, optname string) (string, *string) {
+ c, n := utf8.DecodeRuneInString(optname)
+
+ if n == len(optname) {
+ return optname, nil
+ }
+
+ first := string(c)
+
+ if option := s.lookup.shortNames[first]; option != nil && option.canArgument() {
+ arg := optname[n:]
+ return first, &arg
+ }
+
+ return optname, nil
+}
+
+func (p *Parser) parseShort(s *parseState, optname string, argument *string) error {
+ if argument == nil {
+ optname, argument = p.splitShortConcatArg(s, optname)
+ }
+
+ for i, c := range optname {
+ shortname := string(c)
+
+ if option := s.lookup.shortNames[shortname]; option != nil {
+ // Only the last short argument can consume an argument from
+ // the arguments list, and only if it's non optional
+ canarg := (i+utf8.RuneLen(c) == len(optname)) && !option.OptionalArgument
+
+ if err := p.parseOption(s, shortname, option, canarg, argument); err != nil {
+ return err
+ }
+ } else {
+ return newErrorf(ErrUnknownFlag, "unknown flag `%s'", shortname)
+ }
+
+ // Only the first option can have a concatted argument, so just
+ // clear argument here
+ argument = nil
+ }
+
+ return nil
+}
+
+func (p *parseState) addArgs(args ...string) error {
+ for len(p.positional) > 0 && len(args) > 0 {
+ arg := p.positional[0]
+
+ if err := convert(args[0], arg.value, arg.tag); err != nil {
+ p.err = err
+ return err
+ }
+
+ if !arg.isRemaining() {
+ p.positional = p.positional[1:]
+ }
+
+ args = args[1:]
+ }
+
+ p.retargs = append(p.retargs, args...)
+ return nil
+}
+
+func (p *Parser) parseNonOption(s *parseState) error {
+ if len(s.positional) > 0 {
+ return s.addArgs(s.arg)
+ }
+
+ if len(s.command.commands) > 0 && len(s.retargs) == 0 {
+ if cmd := s.lookup.commands[s.arg]; cmd != nil {
+ s.command.Active = cmd
+ cmd.fillParseState(s)
+
+ return nil
+ } else if !s.command.SubcommandsOptional {
+ s.addArgs(s.arg)
+ return newErrorf(ErrUnknownCommand, "Unknown command `%s'", s.arg)
+ }
+ }
+
+ if (p.Options & PassAfterNonOption) != None {
+ // If PassAfterNonOption is set then all remaining arguments
+ // are considered positional
+ if err := s.addArgs(s.arg); err != nil {
+ return err
+ }
+
+ if err := s.addArgs(s.args...); err != nil {
+ return err
+ }
+
+ s.args = []string{}
+ } else {
+ return s.addArgs(s.arg)
+ }
+
+ return nil
+}
+
+func (p *Parser) showBuiltinHelp() error {
+ var b bytes.Buffer
+
+ p.WriteHelp(&b)
+ return newError(ErrHelp, b.String())
+}
+
+func (p *Parser) printError(err error) error {
+ if err != nil && (p.Options&PrintErrors) != None {
+ flagsErr, ok := err.(*Error)
+
+ if ok && flagsErr.Type == ErrHelp {
+ fmt.Fprintln(os.Stdout, err)
+ } else {
+ fmt.Fprintln(os.Stderr, err)
+ }
+ }
+
+ return err
+}
+
+func (p *Parser) clearIsSet() {
+ p.eachCommand(func(c *Command) {
+ c.eachGroup(func(g *Group) {
+ for _, option := range g.options {
+ option.isSet = false
+ }
+ })
+ }, true)
+}
diff --git a/vendor/github.com/jessevdk/go-flags/termsize.go b/vendor/github.com/jessevdk/go-flags/termsize.go
new file mode 100644
index 0000000..1ca6a85
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/termsize.go
@@ -0,0 +1,28 @@
+// +build !windows,!plan9,!solaris,!appengine
+
+package flags
+
+import (
+ "syscall"
+ "unsafe"
+)
+
+type winsize struct {
+ row, col uint16
+ xpixel, ypixel uint16
+}
+
+func getTerminalColumns() int {
+ ws := winsize{}
+
+ if tIOCGWINSZ != 0 {
+ syscall.Syscall(syscall.SYS_IOCTL,
+ uintptr(0),
+ uintptr(tIOCGWINSZ),
+ uintptr(unsafe.Pointer(&ws)))
+
+ return int(ws.col)
+ }
+
+ return 80
+}
diff --git a/vendor/github.com/jessevdk/go-flags/termsize_nosysioctl.go b/vendor/github.com/jessevdk/go-flags/termsize_nosysioctl.go
new file mode 100644
index 0000000..3d5385b
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/termsize_nosysioctl.go
@@ -0,0 +1,7 @@
+// +build windows plan9 solaris appengine
+
+package flags
+
+func getTerminalColumns() int {
+ return 80
+}
diff --git a/vendor/github.com/jessevdk/go-flags/tiocgwinsz_bsdish.go b/vendor/github.com/jessevdk/go-flags/tiocgwinsz_bsdish.go
new file mode 100644
index 0000000..fcc1186
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/tiocgwinsz_bsdish.go
@@ -0,0 +1,7 @@
+// +build darwin freebsd netbsd openbsd
+
+package flags
+
+const (
+ tIOCGWINSZ = 0x40087468
+)
diff --git a/vendor/github.com/jessevdk/go-flags/tiocgwinsz_linux.go b/vendor/github.com/jessevdk/go-flags/tiocgwinsz_linux.go
new file mode 100644
index 0000000..e3975e2
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/tiocgwinsz_linux.go
@@ -0,0 +1,7 @@
+// +build linux
+
+package flags
+
+const (
+ tIOCGWINSZ = 0x5413
+)
diff --git a/vendor/github.com/jessevdk/go-flags/tiocgwinsz_other.go b/vendor/github.com/jessevdk/go-flags/tiocgwinsz_other.go
new file mode 100644
index 0000000..3082151
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/tiocgwinsz_other.go
@@ -0,0 +1,7 @@
+// +build !darwin,!freebsd,!netbsd,!openbsd,!linux
+
+package flags
+
+const (
+ tIOCGWINSZ = 0
+)