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package git2go
import (
"errors"
"path/filepath"
"strings"
"testing"
"time"
"github.com/stretchr/testify/require"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/git/gittest"
"gitlab.com/gitlab-org/gitaly/internal/git/localrepo"
"gitlab.com/gitlab-org/gitaly/internal/testhelper"
"gitlab.com/gitlab-org/gitaly/internal/testhelper/testcfg"
)
func TestExecutor_Apply(t *testing.T) {
cfg := testcfg.Build(t)
testhelper.ConfigureGitalyGit2GoBin(t, cfg)
repoProto, repoPath, cleanup := gittest.InitBareRepoAt(t, cfg, cfg.Storages[0])
t.Cleanup(cleanup)
repo := localrepo.NewTestRepo(t, cfg, repoProto)
executor := New(filepath.Join(cfg.BinDir, "gitaly-git2go"), cfg.Git.BinPath)
ctx, cancel := testhelper.Context()
defer cancel()
oidBase, err := repo.WriteBlob(ctx, "file", strings.NewReader("base"))
require.NoError(t, err)
oidA, err := repo.WriteBlob(ctx, "file", strings.NewReader("a"))
require.NoError(t, err)
oidB, err := repo.WriteBlob(ctx, "file", strings.NewReader("b"))
require.NoError(t, err)
author := NewSignature("Test Author", "test.author@example.com", time.Now())
committer := NewSignature("Test Committer", "test.committer@example.com", time.Now())
parentCommitSHA, err := executor.Commit(ctx, CommitParams{
Repository: repoPath,
Author: author,
Committer: committer,
Message: "base commit",
Actions: []Action{CreateFile{Path: "file", OID: oidBase.String()}},
})
require.NoError(t, err)
noCommonAncestor, err := executor.Commit(ctx, CommitParams{
Repository: repoPath,
Author: author,
Committer: committer,
Message: "commit with ab",
Actions: []Action{CreateFile{Path: "file", OID: oidA.String()}},
})
require.NoError(t, err)
updateToA, err := executor.Commit(ctx, CommitParams{
Repository: repoPath,
Author: author,
Committer: committer,
Message: "commit with a",
Parent: parentCommitSHA.String(),
Actions: []Action{UpdateFile{Path: "file", OID: oidA.String()}},
})
require.NoError(t, err)
updateToB, err := executor.Commit(ctx, CommitParams{
Repository: repoPath,
Author: author,
Committer: committer,
Message: "commit to b",
Parent: parentCommitSHA.String(),
Actions: []Action{UpdateFile{Path: "file", OID: oidB.String()}},
})
require.NoError(t, err)
updateFromAToB, err := executor.Commit(ctx, CommitParams{
Repository: repoPath,
Author: author,
Committer: committer,
Message: "commit a -> b",
Parent: updateToA.String(),
Actions: []Action{UpdateFile{Path: "file", OID: oidB.String()}},
})
require.NoError(t, err)
otherFile, err := executor.Commit(ctx, CommitParams{
Repository: repoPath,
Author: author,
Committer: committer,
Message: "commit with other-file",
Actions: []Action{CreateFile{Path: "other-file", OID: oidA.String()}},
})
require.NoError(t, err)
diffBetween := func(t testing.TB, fromCommit, toCommit git.ObjectID) []byte {
t.Helper()
return gittest.Exec(t, cfg, "-C", repoPath, "format-patch", "--stdout", fromCommit.String()+".."+toCommit.String())
}
for _, tc := range []struct {
desc string
patches []Patch
parentCommit git.ObjectID
tree []gittest.TreeEntry
error error
}{
{
desc: "patch applies cleanly",
patches: []Patch{
{
Author: author,
Message: "test commit message",
Diff: diffBetween(t, parentCommitSHA, updateToA),
},
},
parentCommit: parentCommitSHA,
tree: []gittest.TreeEntry{
{Path: "file", Mode: "100644", Content: "a"},
},
},
{
desc: "multiple patches apply cleanly",
patches: []Patch{
{
Author: author,
Message: "commit with a",
Diff: diffBetween(t, parentCommitSHA, updateToA),
},
{
Author: author,
Message: "commit with a -> b",
Diff: diffBetween(t, updateToA, updateFromAToB),
},
},
parentCommit: updateToA,
tree: []gittest.TreeEntry{
{Path: "file", Mode: "100644", Content: "b"},
},
},
{
desc: "three way merged",
patches: []Patch{
{
Author: author,
Message: "three-way merged files",
Diff: diffBetween(t, parentCommitSHA, otherFile),
},
},
parentCommit: parentCommitSHA,
tree: []gittest.TreeEntry{
{Path: "file", Mode: "100644", Content: "base"},
{Path: "other-file", Mode: "100644", Content: "a"},
},
},
{
// This test asserts incorrect behavior due to a bug in libgit2's
// git_apply_to_tree function. The correct behavior would be to
// return an error about merge conflict but we currently concatenate
// the blobs of the two trees together. This test will fail once the
// issue is fixed.
//
// See: https://gitlab.com/gitlab-org/gitaly/-/issues/3325
desc: "no common ancestor",
patches: []Patch{
{
Author: author,
Message: "three-way merged file",
Diff: diffBetween(t, parentCommitSHA, noCommonAncestor),
},
},
parentCommit: parentCommitSHA,
// error: ErrMergeConflict, <- correct output
tree: []gittest.TreeEntry{
{Path: "file", Mode: "100644", Content: "abase"},
},
},
{
desc: "merge conflict",
patches: []Patch{
{
Author: author,
Message: "applies cleanly",
Diff: diffBetween(t, parentCommitSHA, updateToA),
},
{
Author: author,
Message: "conflicts",
Diff: diffBetween(t, parentCommitSHA, updateToB),
},
},
error: ErrMergeConflict,
},
} {
t.Run(tc.desc, func(t *testing.T) {
commitID, err := executor.Apply(ctx, ApplyParams{
Repository: repoPath,
Committer: committer,
ParentCommit: parentCommitSHA.String(),
Patches: NewSlicePatchIterator(tc.patches),
})
if tc.error != nil {
require.True(t, errors.Is(err, tc.error), err)
return
}
require.Equal(t, commit{
Parent: tc.parentCommit,
Author: author,
Committer: committer,
Message: tc.patches[len(tc.patches)-1].Message,
}, getCommit(t, ctx, repo, commitID))
gittest.RequireTree(t, cfg, repoPath, commitID.String(), tc.tree)
})
}
}
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