import (
"context"
"fmt"
+ "log"
"net/http"
"os"
"os/exec"
"github.com/google/go-github/v53/github"
"github.com/urfave/cli/v2"
+ "gopkg.in/yaml.v3"
)
+const defaultVersion = "v1.18" // to backport to
+
func main() {
app := cli.NewApp()
app.Name = "backport"
Name: "backport-branch",
Usage: "Backport branch to backport on to (default: backport-<pr>-<version>",
},
+ &cli.StringFlag{
+ Name: "remote",
+ Value: "",
+ Usage: "Remote for your fork of the Gitea upstream",
+ },
+ &cli.StringFlag{
+ Name: "fork-user",
+ Value: "",
+ Usage: "Forked user name on Github",
+ },
&cli.BoolFlag{
Name: "no-fetch",
Usage: "Set this flag to prevent fetch of remote branches",
Name: "no-amend-message",
Usage: "Set this flag to prevent automatic amendment of the commit message",
},
+ &cli.BoolFlag{
+ Name: "no-push",
+ Usage: "Set this flag to prevent pushing the backport up to your fork",
+ },
+ &cli.BoolFlag{
+ Name: "no-xdg-open",
+ Usage: "Set this flag to not use xdg-open to open the PR URL",
+ },
+ &cli.BoolFlag{
+ Name: "continue",
+ Usage: "Set this flag to continue from a git cherry-pick that has broken",
+ },
}
cli.AppHelpTemplate = `NAME:
{{.Name}} - {{.Usage}}
app.Action = runBackport
if err := app.Run(os.Args); err != nil {
- fmt.Fprintf(os.Stderr, "%v\n", err)
+ fmt.Fprintf(os.Stderr, "Unable to backport: %v\n", err)
}
}
ctx, cancel := installSignals()
defer cancel()
+ continuing := c.Bool("continue")
+
+ var pr string
+
version := c.String("version")
+ if version == "" && continuing {
+ // determine version from current branch name
+ var err error
+ pr, version, err = readCurrentBranch(ctx)
+ if err != nil {
+ return err
+ }
+ }
if version == "" {
- return fmt.Errorf("Provide a version to backport to")
+ version = readVersion()
+ }
+ if version == "" {
+ version = defaultVersion
}
upstream := c.String("upstream")
upstream = "origin"
}
+ forkUser := c.String("fork-user")
+ remote := c.String("remote")
+ if remote == "" && !c.Bool("--no-push") {
+ var err error
+ remote, forkUser, err = determineRemote(ctx, forkUser)
+ if err != nil {
+ return err
+ }
+ }
+
upstreamReleaseBranch := c.String("release-branch")
if upstreamReleaseBranch == "" {
upstreamReleaseBranch = path.Join("release", version)
localReleaseBranch := path.Join(upstream, upstreamReleaseBranch)
args := c.Args().Slice()
- if len(args) == 0 {
- return fmt.Errorf("Provide a PR number to backport")
- } else if len(args) != 1 {
- return fmt.Errorf("Only a single PR can be backported at a time")
+ if len(args) == 0 && pr == "" {
+ return fmt.Errorf("no PR number provided\nProvide a PR number to backport")
+ } else if len(args) != 1 && pr == "" {
+ return fmt.Errorf("multiple PRs provided %v\nOnly a single PR can be backported at a time", args)
+ }
+ if pr == "" {
+ pr = args[0]
}
- pr := args[0]
backportBranch := c.String("backport-branch")
if backportBranch == "" {
}
}
- if err := checkoutBackportBranch(ctx, backportBranch, localReleaseBranch); err != nil {
- return err
+ if !continuing {
+ if err := checkoutBackportBranch(ctx, backportBranch, localReleaseBranch); err != nil {
+ return err
+ }
}
if err := cherrypick(ctx, sha); err != nil {
}
}
- fmt.Printf("Backport done! You can now push it with `git push <your remote> %s`\n", backportBranch)
+ if !c.Bool("no-push") {
+ url := "https://github.com/go-gitea/gitea/compare/" + upstreamReleaseBranch + "..." + forkUser + ":" + backportBranch
+
+ if err := gitPushUp(ctx, remote, backportBranch); err != nil {
+ return err
+ }
+
+ if !c.Bool("no-xdg-open") {
+ if err := xdgOpen(ctx, url); err != nil {
+ return err
+ }
+ } else {
+ fmt.Printf("* Navigate to %s to open PR\n", url)
+ }
+ }
+ return nil
+}
+
+func xdgOpen(ctx context.Context, url string) error {
+ fmt.Printf("* `xdg-open %s`\n", url)
+ out, err := exec.CommandContext(ctx, "xdg-open", url).Output()
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "%s", string(out))
+ return fmt.Errorf("unable to xdg-open to %s: %w", url, err)
+ }
+ return nil
+}
+func gitPushUp(ctx context.Context, remote, backportBranch string) error {
+ fmt.Printf("* `git push -u %s %s`\n", remote, backportBranch)
+ out, err := exec.CommandContext(ctx, "git", "push", "-u", remote, backportBranch).Output()
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "%s", string(out))
+ return fmt.Errorf("unable to push up to %s: %w", remote, err)
+ }
return nil
}
}
func cherrypick(ctx context.Context, sha string) error {
+ // Check if a CHERRY_PICK_HEAD exists
+ if _, err := os.Stat(".git/CHERRY_PICK_HEAD"); err == nil {
+ // Assume that we are in the middle of cherry-pick - continue it
+ fmt.Println("* Attempting git cherry-pick --continue")
+ out, err := exec.CommandContext(ctx, "git", "cherry-pick", "--continue").Output()
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "git cherry-pick --continue failed:\n%s\n", string(out))
+ return fmt.Errorf("unable to continue cherry-pick: %w", err)
+ }
+ return nil
+ }
+
fmt.Printf("* Attempting git cherry-pick %s\n", sha)
out, err := exec.CommandContext(ctx, "git", "cherry-pick", sha).Output()
if err != nil {
}
func checkoutBackportBranch(ctx context.Context, backportBranch, releaseBranch string) error {
- fmt.Printf("* `git branch -D %s`\n", backportBranch)
- _ = exec.CommandContext(ctx, "git", "branch", "-D", backportBranch).Run()
+ out, err := exec.CommandContext(ctx, "git", "branch", "--show-current").Output()
+ if err != nil {
+ return fmt.Errorf("unable to check current branch %w", err)
+ }
+
+ currentBranch := strings.TrimSpace(string(out))
+ fmt.Printf("* Current branch is %s\n", currentBranch)
+ if currentBranch == backportBranch {
+ fmt.Printf("* Current branch is %s - not checking out\n", currentBranch)
+ return nil
+ }
+
+ if _, err := exec.CommandContext(ctx, "git", "rev-list", "-1", backportBranch).Output(); err == nil {
+ fmt.Printf("* Branch %s already exists. Checking it out...\n", backportBranch)
+ return exec.CommandContext(ctx, "git", "checkout", "-f", backportBranch).Run()
+ }
fmt.Printf("* `git checkout -b %s %s`\n", backportBranch, releaseBranch)
return exec.CommandContext(ctx, "git", "checkout", "-b", backportBranch, releaseBranch).Run()
fmt.Println(string(out))
return fmt.Errorf("unable to fetch %s from %s: %w", "main", remote, err)
}
+ fmt.Println(string(out))
fmt.Printf("* `git fetch %s %s`\n", remote, releaseBranch)
out, err = exec.CommandContext(ctx, "git", "fetch", remote, releaseBranch).Output()
fmt.Println(string(out))
return fmt.Errorf("unable to fetch %s from %s: %w", releaseBranch, remote, err)
}
+ fmt.Println(string(out))
return nil
}
+func determineRemote(ctx context.Context, forkUser string) (string, string, error) {
+ out, err := exec.CommandContext(ctx, "git", "remote", "-v").Output()
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Unable to list git remotes:\n%s\n", string(out))
+ return "", "", fmt.Errorf("unable to determine forked remote: %w", err)
+ }
+ lines := strings.Split(string(out), "\n")
+ for _, line := range lines {
+ fields := strings.Split(line, "\t")
+ name, remote := fields[0], fields[1]
+ // only look at pushers
+ if !strings.HasSuffix(remote, " (push)") {
+ continue
+ }
+ // only look at github.com pushes
+ if !strings.Contains(remote, "github.com") {
+ continue
+ }
+ // ignore go-gitea/gitea
+ if strings.Contains(remote, "go-gitea/gitea") {
+ continue
+ }
+ if !strings.Contains(remote, forkUser) {
+ continue
+ }
+ if strings.HasPrefix(remote, "git@github.com:") {
+ forkUser = strings.TrimPrefix(remote, "git@github.com:")
+ } else if strings.HasPrefix(remote, "https://github.com/") {
+ forkUser = strings.TrimPrefix(remote, "https://github.com/")
+ } else if strings.HasPrefix(remote, "https://www.github.com/") {
+ forkUser = strings.TrimPrefix(remote, "https://www.github.com/")
+ } else if forkUser == "" {
+ return "", "", fmt.Errorf("unable to extract forkUser from remote %s: %s", name, remote)
+ }
+ idx := strings.Index(forkUser, "/")
+ if idx >= 0 {
+ forkUser = forkUser[:idx]
+ }
+ return name, forkUser, nil
+ }
+ return "", "", fmt.Errorf("unable to find appropriate remote in:\n%s", string(out))
+}
+
+func readCurrentBranch(ctx context.Context) (pr, version string, err error) {
+ out, err := exec.CommandContext(ctx, "git", "branch", "--show-current").Output()
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Unable to read current git branch:\n%s\n", string(out))
+ return "", "", fmt.Errorf("unable to read current git branch: %w", err)
+ }
+ parts := strings.Split(strings.TrimSpace(string(out)), "-")
+
+ if len(parts) != 3 || parts[0] != "backport" {
+ fmt.Fprintf(os.Stderr, "Unable to continue from git branch:\n%s\n", string(out))
+ return "", "", fmt.Errorf("unable to continue from git branch:\n%s", string(out))
+ }
+
+ return parts[1], parts[2], nil
+}
+
+func readVersion() string {
+ bs, err := os.ReadFile("docs/config.yaml")
+ if err != nil {
+ if err == os.ErrNotExist {
+ log.Println("`docs/config.yaml` not present")
+ return ""
+ }
+ fmt.Fprintf(os.Stderr, "Unable to read `docs/config.yaml`: %v\n", err)
+ return ""
+ }
+
+ type params struct {
+ Version string
+ }
+ type docConfig struct {
+ Params params
+ }
+ dc := &docConfig{}
+ if err := yaml.Unmarshal(bs, dc); err != nil {
+ fmt.Fprintf(os.Stderr, "Unable to read `docs/config.yaml`: %v\n", err)
+ return ""
+ }
+
+ if dc.Params.Version == "" {
+ fmt.Fprintf(os.Stderr, "No version in `docs/config.yaml`")
+ return ""
+ }
+
+ version := dc.Params.Version
+ if version[0] != 'v' {
+ version = "v" + version
+ }
+
+ split := strings.SplitN(version, ".", 3)
+
+ return strings.Join(split[:2], ".")
+}
+
func determineSHAforPR(ctx context.Context, prStr string) (string, error) {
prNum, err := strconv.Atoi(prStr)
if err != nil {
projects / gitea.git / commitdiff