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Add WithTag and WithDigest combinator functions

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These functions allow a Named type to be combined with a tag or a
digest. WithTag will replace the ImageReference function in
github.com/docker/docker/utils as the Docker Engine transitions to the
reference package.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
This commit is contained in:
Aaron Lehmann 2015-10-09 17:09:54 -07:00 • committed by Derek McGowan
parent 3943c4165c
commit b07d759241
3 changed files with 122 additions and 1 deletions
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9
reference/regexp.go
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@ -28,6 +28,13 @@ var (
// end of the matched string.
anchoredTagRegexp = regexp.MustCompile(`^` + TagRegexp.String() + `$`)
// DigestRegexp matches valid digests.
DigestRegexp = regexp.MustCompile(`[A-Za-z][A-Za-z0-9]*(?:[-_+.][A-Za-z][A-Za-z0-9]*)*[:][[:xdigit:]]{32,}`)
// anchoredDigestRegexp matches valid digests, anchored at the start and
// end of the matched string.
anchoredDigestRegexp = regexp.MustCompile(`^` + DigestRegexp.String() + `$`)
// NameRegexp is the format for the name component of references. The
// regexp has capturing groups for the hostname and name part omitting
// the seperating forward slash from either.
@ -35,7 +42,7 @@ var (
// ReferenceRegexp is the full supported format of a reference. The
// regexp has capturing groups for name, tag, and digest components.
ReferenceRegexp = regexp.MustCompile(`^((?:` + hostnameRegexp.String() + `/)?` + nameRegexp.String() + `)(?:[:](` + TagRegexp.String() + `))?(?:[@]([A-Za-z][A-Za-z0-9]*(?:[-_+.][A-Za-z][A-Za-z0-9]*)*[:][[:xdigit:]]{32,}))?$`)
ReferenceRegexp = regexp.MustCompile(`^((?:` + hostnameRegexp.String() + `/)?` + nameRegexp.String() + `)(?:[:](` + TagRegexp.String() + `))?(?:[@](` + DigestRegexp.String() + `))?$`)
// anchoredNameRegexp is used to parse a name value, capturing hostname
anchoredNameRegexp = regexp.MustCompile(`^(?:(` + hostnameRegexp.String() + `)/)?(` + nameRegexp.String() + `)$`)