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cmd/go: add support for release tags via git branches

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R=rsc, remyoudompheng, gustavo, dsymonds
CC=golang-dev
https://golang.org/cl/5617057
This commit is contained in:
Gustavo Niemeyer 2012-02-03 03:03:13 -02:00
parent b3750ff52d
commit 7207898fe4
1 changed files with 29 additions and 5 deletions
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34
src/cmd/go/vcs.go
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@ -24,6 +24,7 @@ type vcsCmd struct {
downloadCmd string // command to download updates into an existing repository
tagCmd []tagCmd // commands to list tags
tagLookupCmd []tagCmd // commands to lookup tags before running tagSyncCmd
tagSyncCmd string // command to sync to specific tag
tagSyncDefault string // command to sync to default tag
}
@ -83,7 +84,14 @@ var vcsGit = &vcsCmd{
createCmd: "clone {repo} {dir}",
downloadCmd: "fetch",
tagCmd: []tagCmd{{"tag", `^(\S+)$`}},
tagCmd: []tagCmd{
// tags/xxx matches a git tag named xxx
// origin/xxx matches a git branch named xxx on the default remote repository
{"show-ref", `(?:tags|origin)/(\S+)$`},
},
tagLookupCmd: []tagCmd{
{"show-ref tags/{tag} origin/{tag}", `((?:tags|origin)/\S+)$`},
},
tagSyncCmd: "checkout {tag}",
tagSyncDefault: "checkout origin/master",
}
@ -128,17 +136,17 @@ func (v *vcsCmd) String() string {
// command's combined stdout+stderr to standard error.
// Otherwise run discards the command's output.
func (v *vcsCmd) run(dir string, cmd string, keyval ...string) error {
_, err := v.run1(dir, false, cmd, keyval)
_, err := v.run1(dir, cmd, keyval)
return err
}
// runOutput is like run but returns the output of the command.
func (v *vcsCmd) runOutput(dir string, cmd string, keyval ...string) ([]byte, error) {
return v.run1(dir, true, cmd, keyval)
return v.run1(dir, cmd, keyval)
}
// run1 is the generalized implementation of run and runOutput.
func (v *vcsCmd) run1(dir string, output bool, cmdline string, keyval []string) ([]byte, error) {
func (v *vcsCmd) run1(dir string, cmdline string, keyval []string) ([]byte, error) {
m := make(map[string]string)
for i := 0; i < len(keyval); i += 2 {
m[keyval[i]] = keyval[i+1]
@ -187,7 +195,9 @@ func (v *vcsCmd) tags(dir string) ([]string, error) {
return nil, err
}
re := regexp.MustCompile(`(?m-s)` + tc.pattern)
tags = append(tags, re.FindAllString(string(out), -1)...)
for _, m := range re.FindAllStringSubmatch(string(out), -1) {
tags = append(tags, m[1])
}
}
return tags, nil
}
@ -198,6 +208,20 @@ func (v *vcsCmd) tagSync(dir, tag string) error {
if v.tagSyncCmd == "" {
return nil
}
if tag != "" {
for _, tc := range v.tagLookupCmd {
out, err := v.runOutput(dir, tc.cmd, "tag", tag)
if err != nil {
return err
}
re := regexp.MustCompile(`(?m-s)` + tc.pattern)
m := re.FindStringSubmatch(string(out))
if len(m) > 1 {
tag = m[1]
break
}
}
}
if tag == "" && v.tagSyncDefault != "" {
return v.run(dir, v.tagSyncDefault)
}