SEBA-829 update cordctl to use go mod;
implement run, install, help
Change-Id: I72716d2e245d5ef0dc0603aad149843723ddff9e
diff --git a/vendor/github.com/hashicorp/go-version/.travis.yml b/vendor/github.com/hashicorp/go-version/.travis.yml
new file mode 100644
index 0000000..01c5dc2
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-version/.travis.yml
@@ -0,0 +1,13 @@
+language: go
+
+go:
+ - 1.2
+ - 1.3
+ - 1.4
+ - 1.9
+ - "1.10"
+ - 1.11
+ - 1.12
+
+script:
+ - go test
diff --git a/vendor/github.com/hashicorp/go-version/LICENSE b/vendor/github.com/hashicorp/go-version/LICENSE
new file mode 100644
index 0000000..c33dcc7
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-version/LICENSE
@@ -0,0 +1,354 @@
+Mozilla Public License, version 2.0
+
+1. Definitions
+
+1.1. “Contributor”
+
+ means each individual or legal entity that creates, contributes to the
+ creation of, or owns Covered Software.
+
+1.2. “Contributor Version”
+
+ means the combination of the Contributions of others (if any) used by a
+ Contributor and that particular Contributor’s Contribution.
+
+1.3. “Contribution”
+
+ means Covered Software of a particular Contributor.
+
+1.4. “Covered Software”
+
+ means Source Code Form to which the initial Contributor has attached the
+ notice in Exhibit A, the Executable Form of such Source Code Form, and
+ Modifications of such Source Code Form, in each case including portions
+ thereof.
+
+1.5. “Incompatible With Secondary Licenses”
+ means
+
+ a. that the initial Contributor has attached the notice described in
+ Exhibit B to the Covered Software; or
+
+ b. that the Covered Software was made available under the terms of version
+ 1.1 or earlier of the License, but not also under the terms of a
+ Secondary License.
+
+1.6. “Executable Form”
+
+ means any form of the work other than Source Code Form.
+
+1.7. “Larger Work”
+
+ means a work that combines Covered Software with other material, in a separate
+ file or files, that is not Covered Software.
+
+1.8. “License”
+
+ means this document.
+
+1.9. “Licensable”
+
+ means having the right to grant, to the maximum extent possible, whether at the
+ time of the initial grant or subsequently, any and all of the rights conveyed by
+ this License.
+
+1.10. “Modifications”
+
+ means any of the following:
+
+ a. any file in Source Code Form that results from an addition to, deletion
+ from, or modification of the contents of Covered Software; or
+
+ b. any new file in Source Code Form that contains any Covered Software.
+
+1.11. “Patent Claims” of a Contributor
+
+ means any patent claim(s), including without limitation, method, process,
+ and apparatus claims, in any patent Licensable by such Contributor that
+ would be infringed, but for the grant of the License, by the making,
+ using, selling, offering for sale, having made, import, or transfer of
+ either its Contributions or its Contributor Version.
+
+1.12. “Secondary License”
+
+ means either the GNU General Public License, Version 2.0, the GNU Lesser
+ General Public License, Version 2.1, the GNU Affero General Public
+ License, Version 3.0, or any later versions of those licenses.
+
+1.13. “Source Code Form”
+
+ means the form of the work preferred for making modifications.
+
+1.14. “You” (or “Your”)
+
+ means an individual or a legal entity exercising rights under this
+ License. For legal entities, “You” includes any entity that controls, is
+ controlled by, or is under common control with You. For purposes of this
+ definition, “control” means (a) the power, direct or indirect, to cause
+ the direction or management of such entity, whether by contract or
+ otherwise, or (b) ownership of more than fifty percent (50%) of the
+ outstanding shares or beneficial ownership of such entity.
+
+
+2. License Grants and Conditions
+
+2.1. Grants
+
+ Each Contributor hereby grants You a world-wide, royalty-free,
+ non-exclusive license:
+
+ a. under intellectual property rights (other than patent or trademark)
+ Licensable by such Contributor to use, reproduce, make available,
+ modify, display, perform, distribute, and otherwise exploit its
+ Contributions, either on an unmodified basis, with Modifications, or as
+ part of a Larger Work; and
+
+ b. under Patent Claims of such Contributor to make, use, sell, offer for
+ sale, have made, import, and otherwise transfer either its Contributions
+ or its Contributor Version.
+
+2.2. Effective Date
+
+ The licenses granted in Section 2.1 with respect to any Contribution become
+ effective for each Contribution on the date the Contributor first distributes
+ such Contribution.
+
+2.3. Limitations on Grant Scope
+
+ The licenses granted in this Section 2 are the only rights granted under this
+ License. No additional rights or licenses will be implied from the distribution
+ or licensing of Covered Software under this License. Notwithstanding Section
+ 2.1(b) above, no patent license is granted by a Contributor:
+
+ a. for any code that a Contributor has removed from Covered Software; or
+
+ b. for infringements caused by: (i) Your and any other third party’s
+ modifications of Covered Software, or (ii) the combination of its
+ Contributions with other software (except as part of its Contributor
+ Version); or
+
+ c. under Patent Claims infringed by Covered Software in the absence of its
+ Contributions.
+
+ This License does not grant any rights in the trademarks, service marks, or
+ logos of any Contributor (except as may be necessary to comply with the
+ notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+ No Contributor makes additional grants as a result of Your choice to
+ distribute the Covered Software under a subsequent version of this License
+ (see Section 10.2) or under the terms of a Secondary License (if permitted
+ under the terms of Section 3.3).
+
+2.5. Representation
+
+ Each Contributor represents that the Contributor believes its Contributions
+ are its original creation(s) or it has sufficient rights to grant the
+ rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+ This License is not intended to limit any rights You have under applicable
+ copyright doctrines of fair use, fair dealing, or other equivalents.
+
+2.7. Conditions
+
+ Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
+ Section 2.1.
+
+
+3. Responsibilities
+
+3.1. Distribution of Source Form
+
+ All distribution of Covered Software in Source Code Form, including any
+ Modifications that You create or to which You contribute, must be under the
+ terms of this License. You must inform recipients that the Source Code Form
+ of the Covered Software is governed by the terms of this License, and how
+ they can obtain a copy of this License. You may not attempt to alter or
+ restrict the recipients’ rights in the Source Code Form.
+
+3.2. Distribution of Executable Form
+
+ If You distribute Covered Software in Executable Form then:
+
+ a. such Covered Software must also be made available in Source Code Form,
+ as described in Section 3.1, and You must inform recipients of the
+ Executable Form how they can obtain a copy of such Source Code Form by
+ reasonable means in a timely manner, at a charge no more than the cost
+ of distribution to the recipient; and
+
+ b. You may distribute such Executable Form under the terms of this License,
+ or sublicense it under different terms, provided that the license for
+ the Executable Form does not attempt to limit or alter the recipients’
+ rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+ You may create and distribute a Larger Work under terms of Your choice,
+ provided that You also comply with the requirements of this License for the
+ Covered Software. If the Larger Work is a combination of Covered Software
+ with a work governed by one or more Secondary Licenses, and the Covered
+ Software is not Incompatible With Secondary Licenses, this License permits
+ You to additionally distribute such Covered Software under the terms of
+ such Secondary License(s), so that the recipient of the Larger Work may, at
+ their option, further distribute the Covered Software under the terms of
+ either this License or such Secondary License(s).
+
+3.4. Notices
+
+ You may not remove or alter the substance of any license notices (including
+ copyright notices, patent notices, disclaimers of warranty, or limitations
+ of liability) contained within the Source Code Form of the Covered
+ Software, except that You may alter any license notices to the extent
+ required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+ You may choose to offer, and to charge a fee for, warranty, support,
+ indemnity or liability obligations to one or more recipients of Covered
+ Software. However, You may do so only on Your own behalf, and not on behalf
+ of any Contributor. You must make it absolutely clear that any such
+ warranty, support, indemnity, or liability obligation is offered by You
+ alone, and You hereby agree to indemnify every Contributor for any
+ liability incurred by such Contributor as a result of warranty, support,
+ indemnity or liability terms You offer. You may include additional
+ disclaimers of warranty and limitations of liability specific to any
+ jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+
+ If it is impossible for You to comply with any of the terms of this License
+ with respect to some or all of the Covered Software due to statute, judicial
+ order, or regulation then You must: (a) comply with the terms of this License
+ to the maximum extent possible; and (b) describe the limitations and the code
+ they affect. Such description must be placed in a text file included with all
+ distributions of the Covered Software under this License. Except to the
+ extent prohibited by statute or regulation, such description must be
+ sufficiently detailed for a recipient of ordinary skill to be able to
+ understand it.
+
+5. Termination
+
+5.1. The rights granted under this License will terminate automatically if You
+ fail to comply with any of its terms. However, if You become compliant,
+ then the rights granted under this License from a particular Contributor
+ are reinstated (a) provisionally, unless and until such Contributor
+ explicitly and finally terminates Your grants, and (b) on an ongoing basis,
+ if such Contributor fails to notify You of the non-compliance by some
+ reasonable means prior to 60 days after You have come back into compliance.
+ Moreover, Your grants from a particular Contributor are reinstated on an
+ ongoing basis if such Contributor notifies You of the non-compliance by
+ some reasonable means, this is the first time You have received notice of
+ non-compliance with this License from such Contributor, and You become
+ compliant prior to 30 days after Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+ infringement claim (excluding declaratory judgment actions, counter-claims,
+ and cross-claims) alleging that a Contributor Version directly or
+ indirectly infringes any patent, then the rights granted to You by any and
+ all Contributors for the Covered Software under Section 2.1 of this License
+ shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
+ license agreements (excluding distributors and resellers) which have been
+ validly granted by You or Your distributors under this License prior to
+ termination shall survive termination.
+
+6. Disclaimer of Warranty
+
+ Covered Software is provided under this License on an “as is” basis, without
+ warranty of any kind, either expressed, implied, or statutory, including,
+ without limitation, warranties that the Covered Software is free of defects,
+ merchantable, fit for a particular purpose or non-infringing. The entire
+ risk as to the quality and performance of the Covered Software is with You.
+ Should any Covered Software prove defective in any respect, You (not any
+ Contributor) assume the cost of any necessary servicing, repair, or
+ correction. This disclaimer of warranty constitutes an essential part of this
+ License. No use of any Covered Software is authorized under this License
+ except under this disclaimer.
+
+7. Limitation of Liability
+
+ Under no circumstances and under no legal theory, whether tort (including
+ negligence), contract, or otherwise, shall any Contributor, or anyone who
+ distributes Covered Software as permitted above, be liable to You for any
+ direct, indirect, special, incidental, or consequential damages of any
+ character including, without limitation, damages for lost profits, loss of
+ goodwill, work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses, even if such party shall have been
+ informed of the possibility of such damages. This limitation of liability
+ shall not apply to liability for death or personal injury resulting from such
+ party’s negligence to the extent applicable law prohibits such limitation.
+ Some jurisdictions do not allow the exclusion or limitation of incidental or
+ consequential damages, so this exclusion and limitation may not apply to You.
+
+8. Litigation
+
+ Any litigation relating to this License may be brought only in the courts of
+ a jurisdiction where the defendant maintains its principal place of business
+ and such litigation shall be governed by laws of that jurisdiction, without
+ reference to its conflict-of-law provisions. Nothing in this Section shall
+ prevent a party’s ability to bring cross-claims or counter-claims.
+
+9. Miscellaneous
+
+ This License represents the complete agreement concerning the subject matter
+ hereof. If any provision of this License is held to be unenforceable, such
+ provision shall be reformed only to the extent necessary to make it
+ enforceable. Any law or regulation which provides that the language of a
+ contract shall be construed against the drafter shall not be used to construe
+ this License against a Contributor.
+
+
+10. Versions of the License
+
+10.1. New Versions
+
+ Mozilla Foundation is the license steward. Except as provided in Section
+ 10.3, no one other than the license steward has the right to modify or
+ publish new versions of this License. Each version will be given a
+ distinguishing version number.
+
+10.2. Effect of New Versions
+
+ You may distribute the Covered Software under the terms of the version of
+ the License under which You originally received the Covered Software, or
+ under the terms of any subsequent version published by the license
+ steward.
+
+10.3. Modified Versions
+
+ If you create software not governed by this License, and you want to
+ create a new license for such software, you may create and use a modified
+ version of this License if you rename the license and remove any
+ references to the name of the license steward (except to note that such
+ modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
+ If You choose to distribute Source Code Form that is Incompatible With
+ Secondary Licenses under the terms of this version of the License, the
+ notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+
+ This Source Code Form is subject to the
+ terms of the Mozilla Public License, v.
+ 2.0. If a copy of the MPL was not
+ distributed with this file, You can
+ obtain one at
+ http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular file, then
+You may include the notice in a location (such as a LICENSE file in a relevant
+directory) where a recipient would be likely to look for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - “Incompatible With Secondary Licenses” Notice
+
+ This Source Code Form is “Incompatible
+ With Secondary Licenses”, as defined by
+ the Mozilla Public License, v. 2.0.
+
diff --git a/vendor/github.com/hashicorp/go-version/README.md b/vendor/github.com/hashicorp/go-version/README.md
new file mode 100644
index 0000000..6f3a15c
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-version/README.md
@@ -0,0 +1,65 @@
+# Versioning Library for Go
+[](https://travis-ci.org/hashicorp/go-version)
+
+go-version is a library for parsing versions and version constraints,
+and verifying versions against a set of constraints. go-version
+can sort a collection of versions properly, handles prerelease/beta
+versions, can increment versions, etc.
+
+Versions used with go-version must follow [SemVer](http://semver.org/).
+
+## Installation and Usage
+
+Package documentation can be found on
+[GoDoc](http://godoc.org/github.com/hashicorp/go-version).
+
+Installation can be done with a normal `go get`:
+
+```
+$ go get github.com/hashicorp/go-version
+```
+
+#### Version Parsing and Comparison
+
+```go
+v1, err := version.NewVersion("1.2")
+v2, err := version.NewVersion("1.5+metadata")
+
+// Comparison example. There is also GreaterThan, Equal, and just
+// a simple Compare that returns an int allowing easy >=, <=, etc.
+if v1.LessThan(v2) {
+ fmt.Printf("%s is less than %s", v1, v2)
+}
+```
+
+#### Version Constraints
+
+```go
+v1, err := version.NewVersion("1.2")
+
+// Constraints example.
+constraints, err := version.NewConstraint(">= 1.0, < 1.4")
+if constraints.Check(v1) {
+ fmt.Printf("%s satisfies constraints %s", v1, constraints)
+}
+```
+
+#### Version Sorting
+
+```go
+versionsRaw := []string{"1.1", "0.7.1", "1.4-beta", "1.4", "2"}
+versions := make([]*version.Version, len(versionsRaw))
+for i, raw := range versionsRaw {
+ v, _ := version.NewVersion(raw)
+ versions[i] = v
+}
+
+// After this, the versions are properly sorted
+sort.Sort(version.Collection(versions))
+```
+
+## Issues and Contributing
+
+If you find an issue with this library, please report an issue. If you'd
+like, we welcome any contributions. Fork this library and submit a pull
+request.
diff --git a/vendor/github.com/hashicorp/go-version/constraint.go b/vendor/github.com/hashicorp/go-version/constraint.go
new file mode 100644
index 0000000..d055759
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-version/constraint.go
@@ -0,0 +1,204 @@
+package version
+
+import (
+ "fmt"
+ "reflect"
+ "regexp"
+ "strings"
+)
+
+// Constraint represents a single constraint for a version, such as
+// ">= 1.0".
+type Constraint struct {
+ f constraintFunc
+ check *Version
+ original string
+}
+
+// Constraints is a slice of constraints. We make a custom type so that
+// we can add methods to it.
+type Constraints []*Constraint
+
+type constraintFunc func(v, c *Version) bool
+
+var constraintOperators map[string]constraintFunc
+
+var constraintRegexp *regexp.Regexp
+
+func init() {
+ constraintOperators = map[string]constraintFunc{
+ "": constraintEqual,
+ "=": constraintEqual,
+ "!=": constraintNotEqual,
+ ">": constraintGreaterThan,
+ "<": constraintLessThan,
+ ">=": constraintGreaterThanEqual,
+ "<=": constraintLessThanEqual,
+ "~>": constraintPessimistic,
+ }
+
+ ops := make([]string, 0, len(constraintOperators))
+ for k := range constraintOperators {
+ ops = append(ops, regexp.QuoteMeta(k))
+ }
+
+ constraintRegexp = regexp.MustCompile(fmt.Sprintf(
+ `^\s*(%s)\s*(%s)\s*$`,
+ strings.Join(ops, "|"),
+ VersionRegexpRaw))
+}
+
+// NewConstraint will parse one or more constraints from the given
+// constraint string. The string must be a comma-separated list of
+// constraints.
+func NewConstraint(v string) (Constraints, error) {
+ vs := strings.Split(v, ",")
+ result := make([]*Constraint, len(vs))
+ for i, single := range vs {
+ c, err := parseSingle(single)
+ if err != nil {
+ return nil, err
+ }
+
+ result[i] = c
+ }
+
+ return Constraints(result), nil
+}
+
+// Check tests if a version satisfies all the constraints.
+func (cs Constraints) Check(v *Version) bool {
+ for _, c := range cs {
+ if !c.Check(v) {
+ return false
+ }
+ }
+
+ return true
+}
+
+// Returns the string format of the constraints
+func (cs Constraints) String() string {
+ csStr := make([]string, len(cs))
+ for i, c := range cs {
+ csStr[i] = c.String()
+ }
+
+ return strings.Join(csStr, ",")
+}
+
+// Check tests if a constraint is validated by the given version.
+func (c *Constraint) Check(v *Version) bool {
+ return c.f(v, c.check)
+}
+
+func (c *Constraint) String() string {
+ return c.original
+}
+
+func parseSingle(v string) (*Constraint, error) {
+ matches := constraintRegexp.FindStringSubmatch(v)
+ if matches == nil {
+ return nil, fmt.Errorf("Malformed constraint: %s", v)
+ }
+
+ check, err := NewVersion(matches[2])
+ if err != nil {
+ return nil, err
+ }
+
+ return &Constraint{
+ f: constraintOperators[matches[1]],
+ check: check,
+ original: v,
+ }, nil
+}
+
+func prereleaseCheck(v, c *Version) bool {
+ switch vPre, cPre := v.Prerelease() != "", c.Prerelease() != ""; {
+ case cPre && vPre:
+ // A constraint with a pre-release can only match a pre-release version
+ // with the same base segments.
+ return reflect.DeepEqual(c.Segments64(), v.Segments64())
+
+ case !cPre && vPre:
+ // A constraint without a pre-release can only match a version without a
+ // pre-release.
+ return false
+
+ case cPre && !vPre:
+ // OK, except with the pessimistic operator
+ case !cPre && !vPre:
+ // OK
+ }
+ return true
+}
+
+//-------------------------------------------------------------------
+// Constraint functions
+//-------------------------------------------------------------------
+
+func constraintEqual(v, c *Version) bool {
+ return v.Equal(c)
+}
+
+func constraintNotEqual(v, c *Version) bool {
+ return !v.Equal(c)
+}
+
+func constraintGreaterThan(v, c *Version) bool {
+ return prereleaseCheck(v, c) && v.Compare(c) == 1
+}
+
+func constraintLessThan(v, c *Version) bool {
+ return prereleaseCheck(v, c) && v.Compare(c) == -1
+}
+
+func constraintGreaterThanEqual(v, c *Version) bool {
+ return prereleaseCheck(v, c) && v.Compare(c) >= 0
+}
+
+func constraintLessThanEqual(v, c *Version) bool {
+ return prereleaseCheck(v, c) && v.Compare(c) <= 0
+}
+
+func constraintPessimistic(v, c *Version) bool {
+ // Using a pessimistic constraint with a pre-release, restricts versions to pre-releases
+ if !prereleaseCheck(v, c) || (c.Prerelease() != "" && v.Prerelease() == "") {
+ return false
+ }
+
+ // If the version being checked is naturally less than the constraint, then there
+ // is no way for the version to be valid against the constraint
+ if v.LessThan(c) {
+ return false
+ }
+ // We'll use this more than once, so grab the length now so it's a little cleaner
+ // to write the later checks
+ cs := len(c.segments)
+
+ // If the version being checked has less specificity than the constraint, then there
+ // is no way for the version to be valid against the constraint
+ if cs > len(v.segments) {
+ return false
+ }
+
+ // Check the segments in the constraint against those in the version. If the version
+ // being checked, at any point, does not have the same values in each index of the
+ // constraints segments, then it cannot be valid against the constraint.
+ for i := 0; i < c.si-1; i++ {
+ if v.segments[i] != c.segments[i] {
+ return false
+ }
+ }
+
+ // Check the last part of the segment in the constraint. If the version segment at
+ // this index is less than the constraints segment at this index, then it cannot
+ // be valid against the constraint
+ if c.segments[cs-1] > v.segments[cs-1] {
+ return false
+ }
+
+ // If nothing has rejected the version by now, it's valid
+ return true
+}
diff --git a/vendor/github.com/hashicorp/go-version/go.mod b/vendor/github.com/hashicorp/go-version/go.mod
new file mode 100644
index 0000000..f528555
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-version/go.mod
@@ -0,0 +1 @@
+module github.com/hashicorp/go-version
diff --git a/vendor/github.com/hashicorp/go-version/version.go b/vendor/github.com/hashicorp/go-version/version.go
new file mode 100644
index 0000000..1032c56
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-version/version.go
@@ -0,0 +1,380 @@
+package version
+
+import (
+ "bytes"
+ "fmt"
+ "reflect"
+ "regexp"
+ "strconv"
+ "strings"
+)
+
+// The compiled regular expression used to test the validity of a version.
+var (
+ versionRegexp *regexp.Regexp
+ semverRegexp *regexp.Regexp
+)
+
+// The raw regular expression string used for testing the validity
+// of a version.
+const (
+ VersionRegexpRaw string = `v?([0-9]+(\.[0-9]+)*?)` +
+ `(-([0-9]+[0-9A-Za-z\-~]*(\.[0-9A-Za-z\-~]+)*)|(-?([A-Za-z\-~]+[0-9A-Za-z\-~]*(\.[0-9A-Za-z\-~]+)*)))?` +
+ `(\+([0-9A-Za-z\-~]+(\.[0-9A-Za-z\-~]+)*))?` +
+ `?`
+
+ // SemverRegexpRaw requires a separator between version and prerelease
+ SemverRegexpRaw string = `v?([0-9]+(\.[0-9]+)*?)` +
+ `(-([0-9]+[0-9A-Za-z\-~]*(\.[0-9A-Za-z\-~]+)*)|(-([A-Za-z\-~]+[0-9A-Za-z\-~]*(\.[0-9A-Za-z\-~]+)*)))?` +
+ `(\+([0-9A-Za-z\-~]+(\.[0-9A-Za-z\-~]+)*))?` +
+ `?`
+)
+
+// Version represents a single version.
+type Version struct {
+ metadata string
+ pre string
+ segments []int64
+ si int
+ original string
+}
+
+func init() {
+ versionRegexp = regexp.MustCompile("^" + VersionRegexpRaw + "$")
+ semverRegexp = regexp.MustCompile("^" + SemverRegexpRaw + "$")
+}
+
+// NewVersion parses the given version and returns a new
+// Version.
+func NewVersion(v string) (*Version, error) {
+ return newVersion(v, versionRegexp)
+}
+
+// NewSemver parses the given version and returns a new
+// Version that adheres strictly to SemVer specs
+// https://semver.org/
+func NewSemver(v string) (*Version, error) {
+ return newVersion(v, semverRegexp)
+}
+
+func newVersion(v string, pattern *regexp.Regexp) (*Version, error) {
+ matches := pattern.FindStringSubmatch(v)
+ if matches == nil {
+ return nil, fmt.Errorf("Malformed version: %s", v)
+ }
+ segmentsStr := strings.Split(matches[1], ".")
+ segments := make([]int64, len(segmentsStr))
+ si := 0
+ for i, str := range segmentsStr {
+ val, err := strconv.ParseInt(str, 10, 64)
+ if err != nil {
+ return nil, fmt.Errorf(
+ "Error parsing version: %s", err)
+ }
+
+ segments[i] = int64(val)
+ si++
+ }
+
+ // Even though we could support more than three segments, if we
+ // got less than three, pad it with 0s. This is to cover the basic
+ // default usecase of semver, which is MAJOR.MINOR.PATCH at the minimum
+ for i := len(segments); i < 3; i++ {
+ segments = append(segments, 0)
+ }
+
+ pre := matches[7]
+ if pre == "" {
+ pre = matches[4]
+ }
+
+ return &Version{
+ metadata: matches[10],
+ pre: pre,
+ segments: segments,
+ si: si,
+ original: v,
+ }, nil
+}
+
+// Must is a helper that wraps a call to a function returning (*Version, error)
+// and panics if error is non-nil.
+func Must(v *Version, err error) *Version {
+ if err != nil {
+ panic(err)
+ }
+
+ return v
+}
+
+// Compare compares this version to another version. This
+// returns -1, 0, or 1 if this version is smaller, equal,
+// or larger than the other version, respectively.
+//
+// If you want boolean results, use the LessThan, Equal,
+// GreaterThan, GreaterThanOrEqual or LessThanOrEqual methods.
+func (v *Version) Compare(other *Version) int {
+ // A quick, efficient equality check
+ if v.String() == other.String() {
+ return 0
+ }
+
+ segmentsSelf := v.Segments64()
+ segmentsOther := other.Segments64()
+
+ // If the segments are the same, we must compare on prerelease info
+ if reflect.DeepEqual(segmentsSelf, segmentsOther) {
+ preSelf := v.Prerelease()
+ preOther := other.Prerelease()
+ if preSelf == "" && preOther == "" {
+ return 0
+ }
+ if preSelf == "" {
+ return 1
+ }
+ if preOther == "" {
+ return -1
+ }
+
+ return comparePrereleases(preSelf, preOther)
+ }
+
+ // Get the highest specificity (hS), or if they're equal, just use segmentSelf length
+ lenSelf := len(segmentsSelf)
+ lenOther := len(segmentsOther)
+ hS := lenSelf
+ if lenSelf < lenOther {
+ hS = lenOther
+ }
+ // Compare the segments
+ // Because a constraint could have more/less specificity than the version it's
+ // checking, we need to account for a lopsided or jagged comparison
+ for i := 0; i < hS; i++ {
+ if i > lenSelf-1 {
+ // This means Self had the lower specificity
+ // Check to see if the remaining segments in Other are all zeros
+ if !allZero(segmentsOther[i:]) {
+ // if not, it means that Other has to be greater than Self
+ return -1
+ }
+ break
+ } else if i > lenOther-1 {
+ // this means Other had the lower specificity
+ // Check to see if the remaining segments in Self are all zeros -
+ if !allZero(segmentsSelf[i:]) {
+ //if not, it means that Self has to be greater than Other
+ return 1
+ }
+ break
+ }
+ lhs := segmentsSelf[i]
+ rhs := segmentsOther[i]
+ if lhs == rhs {
+ continue
+ } else if lhs < rhs {
+ return -1
+ }
+ // Otherwis, rhs was > lhs, they're not equal
+ return 1
+ }
+
+ // if we got this far, they're equal
+ return 0
+}
+
+func allZero(segs []int64) bool {
+ for _, s := range segs {
+ if s != 0 {
+ return false
+ }
+ }
+ return true
+}
+
+func comparePart(preSelf string, preOther string) int {
+ if preSelf == preOther {
+ return 0
+ }
+
+ var selfInt int64
+ selfNumeric := true
+ selfInt, err := strconv.ParseInt(preSelf, 10, 64)
+ if err != nil {
+ selfNumeric = false
+ }
+
+ var otherInt int64
+ otherNumeric := true
+ otherInt, err = strconv.ParseInt(preOther, 10, 64)
+ if err != nil {
+ otherNumeric = false
+ }
+
+ // if a part is empty, we use the other to decide
+ if preSelf == "" {
+ if otherNumeric {
+ return -1
+ }
+ return 1
+ }
+
+ if preOther == "" {
+ if selfNumeric {
+ return 1
+ }
+ return -1
+ }
+
+ if selfNumeric && !otherNumeric {
+ return -1
+ } else if !selfNumeric && otherNumeric {
+ return 1
+ } else if !selfNumeric && !otherNumeric && preSelf > preOther {
+ return 1
+ } else if selfInt > otherInt {
+ return 1
+ }
+
+ return -1
+}
+
+func comparePrereleases(v string, other string) int {
+ // the same pre release!
+ if v == other {
+ return 0
+ }
+
+ // split both pre releases for analyse their parts
+ selfPreReleaseMeta := strings.Split(v, ".")
+ otherPreReleaseMeta := strings.Split(other, ".")
+
+ selfPreReleaseLen := len(selfPreReleaseMeta)
+ otherPreReleaseLen := len(otherPreReleaseMeta)
+
+ biggestLen := otherPreReleaseLen
+ if selfPreReleaseLen > otherPreReleaseLen {
+ biggestLen = selfPreReleaseLen
+ }
+
+ // loop for parts to find the first difference
+ for i := 0; i < biggestLen; i = i + 1 {
+ partSelfPre := ""
+ if i < selfPreReleaseLen {
+ partSelfPre = selfPreReleaseMeta[i]
+ }
+
+ partOtherPre := ""
+ if i < otherPreReleaseLen {
+ partOtherPre = otherPreReleaseMeta[i]
+ }
+
+ compare := comparePart(partSelfPre, partOtherPre)
+ // if parts are equals, continue the loop
+ if compare != 0 {
+ return compare
+ }
+ }
+
+ return 0
+}
+
+// Equal tests if two versions are equal.
+func (v *Version) Equal(o *Version) bool {
+ return v.Compare(o) == 0
+}
+
+// GreaterThan tests if this version is greater than another version.
+func (v *Version) GreaterThan(o *Version) bool {
+ return v.Compare(o) > 0
+}
+
+// GreaterThanOrEqualTo tests if this version is greater than or equal to another version.
+func (v *Version) GreaterThanOrEqual(o *Version) bool {
+ return v.Compare(o) >= 0
+}
+
+// LessThan tests if this version is less than another version.
+func (v *Version) LessThan(o *Version) bool {
+ return v.Compare(o) < 0
+}
+
+// LessThanOrEqualTo tests if this version is less than or equal to another version.
+func (v *Version) LessThanOrEqual(o *Version) bool {
+ return v.Compare(o) <= 0
+}
+
+// Metadata returns any metadata that was part of the version
+// string.
+//
+// Metadata is anything that comes after the "+" in the version.
+// For example, with "1.2.3+beta", the metadata is "beta".
+func (v *Version) Metadata() string {
+ return v.metadata
+}
+
+// Prerelease returns any prerelease data that is part of the version,
+// or blank if there is no prerelease data.
+//
+// Prerelease information is anything that comes after the "-" in the
+// version (but before any metadata). For example, with "1.2.3-beta",
+// the prerelease information is "beta".
+func (v *Version) Prerelease() string {
+ return v.pre
+}
+
+// Segments returns the numeric segments of the version as a slice of ints.
+//
+// This excludes any metadata or pre-release information. For example,
+// for a version "1.2.3-beta", segments will return a slice of
+// 1, 2, 3.
+func (v *Version) Segments() []int {
+ segmentSlice := make([]int, len(v.segments))
+ for i, v := range v.segments {
+ segmentSlice[i] = int(v)
+ }
+ return segmentSlice
+}
+
+// Segments64 returns the numeric segments of the version as a slice of int64s.
+//
+// This excludes any metadata or pre-release information. For example,
+// for a version "1.2.3-beta", segments will return a slice of
+// 1, 2, 3.
+func (v *Version) Segments64() []int64 {
+ result := make([]int64, len(v.segments))
+ copy(result, v.segments)
+ return result
+}
+
+// String returns the full version string included pre-release
+// and metadata information.
+//
+// This value is rebuilt according to the parsed segments and other
+// information. Therefore, ambiguities in the version string such as
+// prefixed zeroes (1.04.0 => 1.4.0), `v` prefix (v1.0.0 => 1.0.0), and
+// missing parts (1.0 => 1.0.0) will be made into a canonicalized form
+// as shown in the parenthesized examples.
+func (v *Version) String() string {
+ var buf bytes.Buffer
+ fmtParts := make([]string, len(v.segments))
+ for i, s := range v.segments {
+ // We can ignore err here since we've pre-parsed the values in segments
+ str := strconv.FormatInt(s, 10)
+ fmtParts[i] = str
+ }
+ fmt.Fprintf(&buf, strings.Join(fmtParts, "."))
+ if v.pre != "" {
+ fmt.Fprintf(&buf, "-%s", v.pre)
+ }
+ if v.metadata != "" {
+ fmt.Fprintf(&buf, "+%s", v.metadata)
+ }
+
+ return buf.String()
+}
+
+// Original returns the original parsed version as-is, including any
+// potential whitespace, `v` prefix, etc.
+func (v *Version) Original() string {
+ return v.original
+}
diff --git a/vendor/github.com/hashicorp/go-version/version_collection.go b/vendor/github.com/hashicorp/go-version/version_collection.go
new file mode 100644
index 0000000..cc888d4
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-version/version_collection.go
@@ -0,0 +1,17 @@
+package version
+
+// Collection is a type that implements the sort.Interface interface
+// so that versions can be sorted.
+type Collection []*Version
+
+func (v Collection) Len() int {
+ return len(v)
+}
+
+func (v Collection) Less(i, j int) bool {
+ return v[i].LessThan(v[j])
+}
+
+func (v Collection) Swap(i, j int) {
+ v[i], v[j] = v[j], v[i]
+}