cord-776 create build / runtime containers for autmation uservices
Change-Id: I246973192adef56a250ffe93a5f65fff488840c1
diff --git a/switchq/vendor/github.com/juju/utils/uuid.go b/switchq/vendor/github.com/juju/utils/uuid.go
new file mode 100644
index 0000000..2404efc
--- /dev/null
+++ b/switchq/vendor/github.com/juju/utils/uuid.go
@@ -0,0 +1,90 @@
+// Copyright 2013 Canonical Ltd.
+// Licensed under the LGPLv3, see LICENCE file for details.
+
+package utils
+
+import (
+ "crypto/rand"
+ "encoding/hex"
+ "fmt"
+ "io"
+ "regexp"
+ "strings"
+)
+
+// UUID represent a universal identifier with 16 octets.
+type UUID [16]byte
+
+// regex for validating that the UUID matches RFC 4122.
+// This package generates version 4 UUIDs but
+// accepts any UUID version.
+// http://www.ietf.org/rfc/rfc4122.txt
+var (
+ block1 = "[0-9a-f]{8}"
+ block2 = "[0-9a-f]{4}"
+ block3 = "[0-9a-f]{4}"
+ block4 = "[0-9a-f]{4}"
+ block5 = "[0-9a-f]{12}"
+
+ UUIDSnippet = block1 + "-" + block2 + "-" + block3 + "-" + block4 + "-" + block5
+ validUUID = regexp.MustCompile("^" + UUIDSnippet + "$")
+)
+
+func UUIDFromString(s string) (UUID, error) {
+ if !IsValidUUIDString(s) {
+ return UUID{}, fmt.Errorf("invalid UUID: %q", s)
+ }
+ s = strings.Replace(s, "-", "", 4)
+ raw, err := hex.DecodeString(s)
+ if err != nil {
+ return UUID{}, err
+ }
+ var uuid UUID
+ copy(uuid[:], raw)
+ return uuid, nil
+}
+
+// IsValidUUIDString returns true, if the given string matches a valid UUID (version 4, variant 2).
+func IsValidUUIDString(s string) bool {
+ return validUUID.MatchString(s)
+}
+
+// MustNewUUID returns a new uuid, if an error occurs it panics.
+func MustNewUUID() UUID {
+ uuid, err := NewUUID()
+ if err != nil {
+ panic(err)
+ }
+ return uuid
+}
+
+// NewUUID generates a new version 4 UUID relying only on random numbers.
+func NewUUID() (UUID, error) {
+ uuid := UUID{}
+ if _, err := io.ReadFull(rand.Reader, []byte(uuid[0:16])); err != nil {
+ return UUID{}, err
+ }
+ // Set version (4) and variant (2) according to RfC 4122.
+ var version byte = 4 << 4
+ var variant byte = 8 << 4
+ uuid[6] = version | (uuid[6] & 15)
+ uuid[8] = variant | (uuid[8] & 15)
+ return uuid, nil
+}
+
+// Copy returns a copy of the UUID.
+func (uuid UUID) Copy() UUID {
+ uuidCopy := uuid
+ return uuidCopy
+}
+
+// Raw returns a copy of the UUID bytes.
+func (uuid UUID) Raw() [16]byte {
+ return [16]byte(uuid)
+}
+
+// String returns a hexadecimal string representation with
+// standardized separators.
+func (uuid UUID) String() string {
+ return fmt.Sprintf("%x-%x-%x-%x-%x", uuid[0:4], uuid[4:6], uuid[6:8], uuid[8:10], uuid[10:16])
+}