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create rc pull request when the default branch proceeded #2
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package rcpr | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "errors" | ||
| "fmt" | ||
| "io" | ||
| "os/exec" | ||
| "regexp" | ||
| "strings" | ||
| ) | ||
|
|
||
| func git(args ...string) (string, string, error) { | ||
| var ( | ||
| outBuf bytes.Buffer | ||
| errBuf bytes.Buffer | ||
| ) | ||
| cmd := exec.Command("git", args...) | ||
| cmd.Stdout = &outBuf | ||
| cmd.Stderr = &errBuf | ||
| err := cmd.Run() | ||
| return strings.TrimSpace(outBuf.String()), strings.TrimSpace(errBuf.String()), err | ||
| } | ||
|
|
||
| type cmd struct { | ||
| outStream, errStream io.Writer | ||
| dir string | ||
| err error | ||
| } | ||
|
|
||
| func (c *cmd) git(args ...string) (string, string) { | ||
| return c.run("git", args...) | ||
| } | ||
|
|
||
| func (c *cmd) run(prog string, args ...string) (string, string) { | ||
| if c.err != nil { | ||
| return "", "" | ||
| } | ||
| var ( | ||
| outBuf bytes.Buffer | ||
| errBuf bytes.Buffer | ||
| ) | ||
| cmd := exec.Command(prog, args...) | ||
| cmd.Stdout = io.MultiWriter(&outBuf, c.outStream) | ||
| cmd.Stderr = io.MultiWriter(&errBuf, c.errStream) | ||
| if c.dir != "" { | ||
| cmd.Dir = c.dir | ||
| } | ||
| c.err = cmd.Run() | ||
| return outBuf.String(), errBuf.String() | ||
| } | ||
|
|
||
| var headBranchReg = regexp.MustCompile(`(?m)^\s*HEAD branch: (.*)$`) | ||
|
|
||
| func defaultBranch(remote string) (string, error) { | ||
| if remote == "" { | ||
| var err error | ||
| remote, err = detectRemote() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| } | ||
| // `git symbolic-ref refs/remotes/origin/HEAD` sometimes doesn't work | ||
| // So use `git remote show origin` for detecting default branch | ||
| show, _, err := git("remote", "show", remote) | ||
| if err != nil { | ||
| return "", fmt.Errorf("failed to detect defaut branch: %w", err) | ||
| } | ||
| m := headBranchReg.FindStringSubmatch(show) | ||
| if len(m) < 2 { | ||
| return "", fmt.Errorf("failed to detect default branch from remote: %s", remote) | ||
| } | ||
| return m[1], nil | ||
| } | ||
|
|
||
| func detectRemote() (string, error) { | ||
| remotesStr, _, err := git("remote") | ||
| if err != nil { | ||
| return "", fmt.Errorf("failed to detect remote: %s", err) | ||
| } | ||
| remotes := strings.Fields(remotesStr) | ||
| if len(remotes) == 1 { | ||
| return remotes[0], nil | ||
| } | ||
| for _, r := range remotes { | ||
| if r == "origin" { | ||
| return r, nil | ||
| } | ||
| } | ||
| return "", errors.New("failed to detect remote") | ||
| } |
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🚫 [staticcheck] <SA4006> reported by reviewdog 🐶
this value of err is never used