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1463426a27
In Git 2.38, the `merge-tree` command introduced the `--write-tree` option, which works directly on bare repositories. In Git 2.40, a new parameter `--merge-base` introduced so we require Git 2.40 to use the merge tree feature. This option produces the merged tree object ID, allowing us to perform diffs between commits without creating a temporary repository. By avoiding the overhead of setting up and tearing down temporary repos, this approach delivers a notable performance improvement. It also fixes a possible situation that conflict files might be empty but it's a conflict status according to https://git-scm.com/docs/git-merge-tree#_mistakes_to_avoid Replace #35542 --------- Signed-off-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
155 lines
4.5 KiB
Go
155 lines
4.5 KiB
Go
// Copyright 2026 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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"context"
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"fmt"
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"testing"
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issues_model "code.gitea.io/gitea/models/issues"
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"code.gitea.io/gitea/models/unittest"
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"code.gitea.io/gitea/modules/git/gitcmd"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func testPullRequestMergeCheck(t *testing.T,
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targetFunc func(ctx context.Context, pr *issues_model.PullRequest) error,
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pr *issues_model.PullRequest,
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expectedStatus issues_model.PullRequestStatus,
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expectedConflictedFiles []string,
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expectedChangedProtectedFiles []string,
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) {
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assert.NoError(t, pr.LoadIssue(t.Context()))
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assert.NoError(t, pr.LoadBaseRepo(t.Context()))
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assert.NoError(t, pr.LoadHeadRepo(t.Context()))
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pr.Status = issues_model.PullRequestStatusChecking
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pr.ConflictedFiles = []string{"unrelated-conflicted-file"}
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pr.ChangedProtectedFiles = []string{"unrelated-protected-file"}
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pr.MergeBase = ""
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pr.HeadCommitID = ""
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err := targetFunc(t.Context(), pr)
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require.NoError(t, err)
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assert.Equal(t, expectedStatus, pr.Status)
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assert.Equal(t, expectedConflictedFiles, pr.ConflictedFiles)
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assert.Equal(t, expectedChangedProtectedFiles, pr.ChangedProtectedFiles)
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assert.NotEmpty(t, pr.MergeBase)
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assert.NotEmpty(t, pr.HeadCommitID)
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}
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func TestPullRequestMergeable(t *testing.T) {
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assert.NoError(t, unittest.PrepareTestDatabase())
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pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 2})
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t.Run("NoConflict-MergeTree", func(t *testing.T) {
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testPullRequestMergeCheck(t, checkPullRequestMergeableByMergeTree, pr, issues_model.PullRequestStatusMergeable, nil, nil)
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})
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t.Run("NoConflict-TmpRepo", func(t *testing.T) {
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testPullRequestMergeCheck(t, checkPullRequestMergeableByTmpRepo, pr, issues_model.PullRequestStatusMergeable, nil, nil)
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})
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pr.BaseBranch, pr.HeadBranch = "test-merge-tree-conflict-base", "test-merge-tree-conflict-head"
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conflictFiles := createConflictBranches(t, pr.BaseRepo.RepoPath(), pr.BaseBranch, pr.HeadBranch)
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t.Run("Conflict-MergeTree", func(t *testing.T) {
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testPullRequestMergeCheck(t, checkPullRequestMergeableByMergeTree, pr, issues_model.PullRequestStatusConflict, conflictFiles, nil)
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})
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t.Run("Conflict-TmpRepo", func(t *testing.T) {
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testPullRequestMergeCheck(t, checkPullRequestMergeableByTmpRepo, pr, issues_model.PullRequestStatusConflict, conflictFiles, nil)
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})
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pr.BaseBranch, pr.HeadBranch = "test-merge-tree-empty-base", "test-merge-tree-empty-head"
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createEmptyBranches(t, pr.BaseRepo.RepoPath(), pr.BaseBranch, pr.HeadBranch)
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t.Run("Empty-MergeTree", func(t *testing.T) {
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testPullRequestMergeCheck(t, checkPullRequestMergeableByMergeTree, pr, issues_model.PullRequestStatusEmpty, nil, nil)
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})
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t.Run("Empty-TmpRepo", func(t *testing.T) {
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testPullRequestMergeCheck(t, checkPullRequestMergeableByTmpRepo, pr, issues_model.PullRequestStatusEmpty, nil, nil)
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})
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}
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func createConflictBranches(t *testing.T, repoPath, baseBranch, headBranch string) []string {
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conflictFile := "conflict.txt"
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stdin := fmt.Sprintf(
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`reset refs/heads/%[1]s
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from refs/heads/master
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commit refs/heads/%[1]s
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mark :1
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committer Test <test@example.com> 0 +0000
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data 17
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add conflict file
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M 100644 inline %[3]s
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data 4
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base
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commit refs/heads/%[1]s
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mark :2
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committer Test <test@example.com> 0 +0000
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data 11
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base change
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from :1
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M 100644 inline %[3]s
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data 11
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base change
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reset refs/heads/%[2]s
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from :1
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commit refs/heads/%[2]s
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mark :3
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committer Test <test@example.com> 0 +0000
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data 11
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head change
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from :1
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M 100644 inline %[3]s
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data 11
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head change
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`, baseBranch, headBranch, conflictFile)
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err := gitcmd.NewCommand("fast-import").WithDir(repoPath).WithStdinBytes([]byte(stdin)).RunWithStderr(t.Context())
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require.NoError(t, err)
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return []string{conflictFile}
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}
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func createEmptyBranches(t *testing.T, repoPath, baseBranch, headBranch string) {
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emptyFile := "empty.txt"
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stdin := fmt.Sprintf(`reset refs/heads/%[1]s
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from refs/heads/master
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commit refs/heads/%[1]s
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mark :1
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committer Test <test@example.com> 0 +0000
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data 14
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add empty file
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M 100644 inline %[3]s
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data 4
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base
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reset refs/heads/%[2]s
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from :1
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commit refs/heads/%[2]s
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mark :2
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committer Test <test@example.com> 0 +0000
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data 17
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change empty file
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from :1
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M 100644 inline %[3]s
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data 6
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change
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commit refs/heads/%[2]s
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mark :3
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committer Test <test@example.com> 0 +0000
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data 17
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revert empty file
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from :2
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M 100644 inline %[3]s
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data 4
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base
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`, baseBranch, headBranch, emptyFile)
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err := gitcmd.NewCommand("fast-import").WithDir(repoPath).WithStdinBytes([]byte(stdin)).RunWithStderr(t.Context())
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require.NoError(t, err)
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}
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