121 lines
4.0 KiB
Go
121 lines
4.0 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package pull
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import (
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"fmt"
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"strings"
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repo_model "code.gitea.io/gitea/models/repo"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/log"
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)
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// getRebaseAmendMessage composes the message to amend commits in rebase merge of a pull request.
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func getRebaseAmendMessage(ctx *mergeContext, baseGitRepo *git.Repository) (message string, err error) {
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// Get existing commit message.
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commitMessage, _, err := git.NewCommand(ctx, "show", "--format=%B", "-s").RunStdString(&git.RunOpts{Dir: ctx.tmpBasePath})
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if err != nil {
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return "", err
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}
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commitTitle, commitBody, _ := strings.Cut(commitMessage, "\n")
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extraVars := map[string]string{"CommitTitle": strings.TrimSpace(commitTitle), "CommitBody": strings.TrimSpace(commitBody)}
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message, body, err := getMergeMessage(ctx, baseGitRepo, ctx.pr, repo_model.MergeStyleRebase, extraVars)
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if err != nil || message == "" {
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return "", err
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}
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if len(body) > 0 {
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message = message + "\n\n" + body
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}
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return message, err
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}
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// Perform rebase merge without merge commit.
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func doMergeRebaseFastForward(ctx *mergeContext) error {
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baseHeadSHA, err := git.GetFullCommitID(ctx, ctx.tmpBasePath, "HEAD")
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if err != nil {
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return fmt.Errorf("Failed to get full commit id for HEAD: %w", err)
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}
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cmd := git.NewCommand(ctx, "merge", "--ff-only").AddDynamicArguments(stagingBranch)
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if err := runMergeCommand(ctx, repo_model.MergeStyleRebase, cmd); err != nil {
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log.Error("Unable to merge staging into base: %v", err)
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return err
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}
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// Check if anything actually changed before we amend the message, fast forward can skip commits.
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newMergeHeadSHA, err := git.GetFullCommitID(ctx, ctx.tmpBasePath, "HEAD")
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if err != nil {
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return fmt.Errorf("Failed to get full commit id for HEAD: %w", err)
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}
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if baseHeadSHA == newMergeHeadSHA {
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return nil
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}
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// Original repo to read template from.
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baseGitRepo, err := git.OpenRepository(ctx, ctx.pr.BaseRepo.RepoPath())
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if err != nil {
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log.Error("Unable to get Git repo for rebase: %v", err)
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return err
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}
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defer baseGitRepo.Close()
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// Amend last commit message based on template, if one exists
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newMessage, err := getRebaseAmendMessage(ctx, baseGitRepo)
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if err != nil {
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log.Error("Unable to get commit message for amend: %v", err)
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return err
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}
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if newMessage != "" {
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if err := git.NewCommand(ctx, "commit", "--amend").AddOptionFormat("--message=%s", newMessage).Run(&git.RunOpts{Dir: ctx.tmpBasePath}); err != nil {
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log.Error("Unable to amend commit message: %v", err)
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return err
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}
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}
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return nil
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}
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// Perform rebase merge with merge commit.
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func doMergeRebaseMergeCommit(ctx *mergeContext, message string) error {
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cmd := git.NewCommand(ctx, "merge").AddArguments("--no-ff", "--no-commit").AddDynamicArguments(stagingBranch)
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if err := runMergeCommand(ctx, repo_model.MergeStyleRebaseMerge, cmd); err != nil {
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log.Error("Unable to merge staging into base: %v", err)
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return err
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}
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if err := commitAndSignNoAuthor(ctx, message); err != nil {
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log.Error("Unable to make final commit: %v", err)
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return err
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}
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return nil
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}
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// doMergeStyleRebase rebases the tracking branch on the base branch as the current HEAD with or with a merge commit to the original pr branch
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func doMergeStyleRebase(ctx *mergeContext, mergeStyle repo_model.MergeStyle, message string) error {
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if err := rebaseTrackingOnToBase(ctx, mergeStyle); err != nil {
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return err
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}
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// Checkout base branch again
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if err := git.NewCommand(ctx, "checkout").AddDynamicArguments(baseBranch).
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Run(ctx.RunOpts()); err != nil {
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log.Error("git checkout base prior to merge post staging rebase %-v: %v\n%s\n%s", ctx.pr, err, ctx.outbuf.String(), ctx.errbuf.String())
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return fmt.Errorf("git checkout base prior to merge post staging rebase %v: %w\n%s\n%s", ctx.pr, err, ctx.outbuf.String(), ctx.errbuf.String())
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}
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ctx.outbuf.Reset()
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ctx.errbuf.Reset()
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if mergeStyle == repo_model.MergeStyleRebase {
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return doMergeRebaseFastForward(ctx)
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}
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return doMergeRebaseMergeCommit(ctx, message)
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}
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