cord-776 create build / runtime containers for autmation uservices
Change-Id: I246973192adef56a250ffe93a5f65fff488840c1
diff --git a/automation/vendor/github.com/juju/utils/set/strings.go b/automation/vendor/github.com/juju/utils/set/strings.go
new file mode 100644
index 0000000..b89f932
--- /dev/null
+++ b/automation/vendor/github.com/juju/utils/set/strings.go
@@ -0,0 +1,112 @@
+// Copyright 2013 Canonical Ltd.
+// Licensed under the LGPLv3, see LICENCE file for details.
+
+package set
+
+import (
+ "sort"
+)
+
+// Strings represents the classic "set" data structure, and contains strings.
+type Strings map[string]bool
+
+// NewStrings creates and initializes a Strings and populates it with
+// initial values as specified in the parameters.
+func NewStrings(initial ...string) Strings {
+ result := make(Strings)
+ for _, value := range initial {
+ result.Add(value)
+ }
+ return result
+}
+
+// Size returns the number of elements in the set.
+func (s Strings) Size() int {
+ return len(s)
+}
+
+// IsEmpty is true for empty or uninitialized sets.
+func (s Strings) IsEmpty() bool {
+ return len(s) == 0
+}
+
+// Add puts a value into the set.
+func (s Strings) Add(value string) {
+ if s == nil {
+ panic("uninitalised set")
+ }
+ s[value] = true
+}
+
+// Remove takes a value out of the set. If value wasn't in the set to start
+// with, this method silently succeeds.
+func (s Strings) Remove(value string) {
+ delete(s, value)
+}
+
+// Contains returns true if the value is in the set, and false otherwise.
+func (s Strings) Contains(value string) bool {
+ _, exists := s[value]
+ return exists
+}
+
+// Values returns an unordered slice containing all the values in the set.
+func (s Strings) Values() []string {
+ result := make([]string, len(s))
+ i := 0
+ for key := range s {
+ result[i] = key
+ i++
+ }
+ return result
+}
+
+// SortedValues returns an ordered slice containing all the values in the set.
+func (s Strings) SortedValues() []string {
+ values := s.Values()
+ sort.Strings(values)
+ return values
+}
+
+// Union returns a new Strings representing a union of the elments in the
+// method target and the parameter.
+func (s Strings) Union(other Strings) Strings {
+ result := make(Strings)
+ // Use the internal map rather than going through the friendlier functions
+ // to avoid extra allocation of slices.
+ for value := range s {
+ result[value] = true
+ }
+ for value := range other {
+ result[value] = true
+ }
+ return result
+}
+
+// Intersection returns a new Strings representing a intersection of the elments in the
+// method target and the parameter.
+func (s Strings) Intersection(other Strings) Strings {
+ result := make(Strings)
+ // Use the internal map rather than going through the friendlier functions
+ // to avoid extra allocation of slices.
+ for value := range s {
+ if other.Contains(value) {
+ result[value] = true
+ }
+ }
+ return result
+}
+
+// Difference returns a new Strings representing all the values in the
+// target that are not in the parameter.
+func (s Strings) Difference(other Strings) Strings {
+ result := make(Strings)
+ // Use the internal map rather than going through the friendlier functions
+ // to avoid extra allocation of slices.
+ for value := range s {
+ if !other.Contains(value) {
+ result[value] = true
+ }
+ }
+ return result
+}