mirror of
https://github.com/apricote/releaser-pleaser.git
synced 2026-01-13 13:21:00 +00:00
feat: avoid pushing release branch only for rebasing (#114)
Right now releaser-pleaser pushes the branch even if it is only for a "rebase",
this wastes CI resources. Instead, it should only push when there are changes
to the files it owns.
- **Old**: Push when there is a diff origin/release-pr..release-pr
- **New**: Push when the these two diffs are not the same:
origin/main..release-pr
$(git merge-base origin/main origin/release-pr)..release-pr
Closes #92
This commit is contained in:
GitHub
parent
175d6d0633
commit
81a855f5ab
5 changed files with 376 additions and 11 deletions
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@ -193,8 +193,27 @@ func (r *Repository) Commit(_ context.Context, message string, author Author) (C
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}, nil
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}
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func (r *Repository) HasChangesWithRemote(ctx context.Context, branch string) (bool, error) {
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remoteRef, err := r.r.Reference(plumbing.NewRemoteReferenceName(remoteName, branch), false)
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// HasChangesWithRemote checks if the following two diffs are equal:
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//
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// - **Local**: remote/main..branch
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// - **Remote**: (git merge-base remote/main remote/branch)..remote/branch
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//
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// This is done to avoid pushing when the only change would be a rebase of remote/branch onto the current remote/main.
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func (r *Repository) HasChangesWithRemote(ctx context.Context, mainBranch, prBranch string) (bool, error) {
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return r.hasChangesWithRemote(ctx,
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plumbing.NewRemoteReferenceName(remoteName, mainBranch),
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plumbing.NewBranchReferenceName(prBranch),
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plumbing.NewRemoteReferenceName(remoteName, prBranch),
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)
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}
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func (r *Repository) hasChangesWithRemote(ctx context.Context, mainBranchRef, localPRBranchRef, remotePRBranchRef plumbing.ReferenceName) (bool, error) {
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commitOnRemoteMain, err := r.commitFromRef(mainBranchRef)
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if err != nil {
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return false, err
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}
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commitOnRemotePRBranch, err := r.commitFromRef(remotePRBranchRef)
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if err != nil {
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if err.Error() == "reference not found" {
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// No remote branch means that there are changes
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@ -204,29 +223,60 @@ func (r *Repository) HasChangesWithRemote(ctx context.Context, branch string) (b
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return false, err
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}
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remoteCommit, err := r.r.CommitObject(remoteRef.Hash())
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currentRemotePRMergeBase, err := r.mergeBase(commitOnRemoteMain, commitOnRemotePRBranch)
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if err != nil {
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return false, err
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}
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if currentRemotePRMergeBase == nil {
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// If there is no merge base something weird has happened with the
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// remote main branch, and we should definitely push updates.
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return false, nil
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}
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remoteDiff, err := commitOnRemotePRBranch.PatchContext(ctx, currentRemotePRMergeBase)
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if err != nil {
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return false, err
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}
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localRef, err := r.r.Reference(plumbing.NewBranchReferenceName(branch), false)
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commitOnLocalPRBranch, err := r.commitFromRef(localPRBranchRef)
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if err != nil {
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return false, err
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}
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localCommit, err := r.r.CommitObject(localRef.Hash())
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localDiff, err := commitOnRemoteMain.PatchContext(ctx, commitOnLocalPRBranch)
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if err != nil {
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return false, err
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}
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diff, err := localCommit.PatchContext(ctx, remoteCommit)
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return remoteDiff.String() == localDiff.String(), nil
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}
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func (r *Repository) commitFromRef(refName plumbing.ReferenceName) (*object.Commit, error) {
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ref, err := r.r.Reference(refName, false)
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if err != nil {
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return false, err
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return nil, err
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}
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hasChanges := len(diff.FilePatches()) > 0
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commit, err := r.r.CommitObject(ref.Hash())
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if err != nil {
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return nil, err
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}
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return hasChanges, nil
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return commit, nil
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}
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func (r *Repository) mergeBase(a, b *object.Commit) (*object.Commit, error) {
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mergeBases, err := a.MergeBase(b)
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if err != nil {
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return nil, err
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}
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if len(mergeBases) == 0 {
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return nil, nil
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}
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// :shrug: We dont really care which commit we pick, at worst we do an unnecessary push.
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return mergeBases[0], nil
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}
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func (r *Repository) ForcePush(ctx context.Context, branch string) error {
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@ -1,12 +1,15 @@
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package git
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import (
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"context"
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"reflect"
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"strconv"
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"testing"
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"time"
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"github.com/go-git/go-git/v5/plumbing"
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"github.com/go-git/go-git/v5/plumbing/object"
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"github.com/stretchr/testify/assert"
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)
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func TestAuthor_signature(t *testing.T) {
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@ -44,3 +47,126 @@ func TestAuthor_String(t *testing.T) {
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})
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}
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}
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const testMainBranch = "main"
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const testPRBranch = "releaser-pleaser"
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func TestRepository_HasChangesWithRemote(t *testing.T) {
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// go-git/v5 has a bug where it tries to delete the repo root dir (".") multiple times if there is no file left in it.
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// this happens while switching branches in worktree.go rmFileAndDirsIfEmpty.
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// TODO: Fix bug upstream
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// For now I just make sure that there is always at least one file left in the dir by adding an empty "README.md" in the test util.
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mainBranchRef := plumbing.NewBranchReferenceName(testMainBranch)
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localPRBranchRef := plumbing.NewBranchReferenceName(testPRBranch)
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remotePRBranchRef := plumbing.NewBranchReferenceName("remote/" + testPRBranch)
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tests := []struct {
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name string
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repo TestRepo
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want bool
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wantErr assert.ErrorAssertionFunc
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}{
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{
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name: "no remote pr branch",
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repo: WithTestRepo(
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WithCommit(
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"chore: release v1.0.0",
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WithFile("VERSION", "v1.0.0"),
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),
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WithCommit(
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"chore: release v1.1.0",
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OnBranch(mainBranchRef),
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AsNewBranch(localPRBranchRef),
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WithFile("VERSION", "v1.1.0"),
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),
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),
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want: true,
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wantErr: assert.NoError,
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},
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{
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name: "remote pr branch matches local",
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repo: WithTestRepo(
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WithCommit(
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"chore: release v1.0.0",
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WithFile("VERSION", "v1.0.0"),
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),
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WithCommit(
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"chore: release v1.1.0",
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OnBranch(mainBranchRef),
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AsNewBranch(remotePRBranchRef),
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WithFile("VERSION", "v1.1.0"),
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),
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WithCommit(
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"chore: release v1.1.0",
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OnBranch(mainBranchRef),
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AsNewBranch(localPRBranchRef),
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WithFile("VERSION", "v1.1.0"),
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),
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),
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want: false,
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wantErr: assert.NoError,
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},
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{
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name: "remote pr only needs rebase",
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repo: WithTestRepo(
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WithCommit(
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"chore: release v1.0.0",
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WithFile("VERSION", "v1.0.0"),
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),
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WithCommit(
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"chore: release v1.1.0",
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OnBranch(mainBranchRef),
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AsNewBranch(remotePRBranchRef),
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WithFile("VERSION", "v1.1.0"),
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),
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WithCommit(
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"feat: new feature on remote",
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OnBranch(mainBranchRef),
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WithFile("feature", "yes"),
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),
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WithCommit(
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"chore: release v1.1.0",
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OnBranch(mainBranchRef),
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AsNewBranch(localPRBranchRef),
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WithFile("VERSION", "v1.1.0"),
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),
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),
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want: false,
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wantErr: assert.NoError,
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},
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{
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name: "needs update",
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repo: WithTestRepo(
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WithCommit(
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"chore: release v1.0.0",
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WithFile("VERSION", "v1.0.0"),
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),
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WithCommit(
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"chore: release v1.1.0",
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OnBranch(mainBranchRef),
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AsNewBranch(remotePRBranchRef),
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WithFile("VERSION", "v1.1.0"),
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),
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WithCommit(
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"chore: release v1.2.0",
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OnBranch(mainBranchRef),
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AsNewBranch(localPRBranchRef),
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WithFile("VERSION", "v1.2.0"),
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),
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),
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want: false,
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wantErr: assert.NoError,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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repo := tt.repo(t)
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got, err := repo.hasChangesWithRemote(context.Background(), mainBranchRef, localPRBranchRef, remotePRBranchRef)
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if !tt.wantErr(t, err) {
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return
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}
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assert.Equal(t, tt.want, got)
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})
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}
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}
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189
internal/git/util_test.go
Normal file
189
internal/git/util_test.go
Normal file
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@ -0,0 +1,189 @@
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package git
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import (
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"fmt"
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"io"
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"log/slog"
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"os"
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"testing"
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"time"
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"github.com/go-git/go-billy/v5/memfs"
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"github.com/go-git/go-git/v5"
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"github.com/go-git/go-git/v5/plumbing"
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"github.com/go-git/go-git/v5/plumbing/object"
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"github.com/go-git/go-git/v5/storage/memory"
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"github.com/stretchr/testify/require"
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)
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var (
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author = &object.Signature{
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Name: "releaser-pleaser",
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When: time.Date(2020, 01, 01, 01, 01, 01, 01, time.UTC),
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}
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)
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type CommitOption func(*commitOptions)
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type commitOptions struct {
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cleanFiles bool
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files []commitFile
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tags []string
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newRef plumbing.ReferenceName
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parentRef plumbing.ReferenceName
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}
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type commitFile struct {
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path string
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content string
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}
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type TestCommit func(*testing.T, *Repository) error
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type TestRepo func(*testing.T) *Repository
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func WithCommit(message string, options ...CommitOption) TestCommit {
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return func(t *testing.T, repo *Repository) error {
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t.Helper()
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require.NotEmpty(t, message, "commit message is required")
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opts := &commitOptions{}
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for _, opt := range options {
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opt(opts)
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}
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wt, err := repo.r.Worktree()
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require.NoError(t, err)
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if opts.parentRef != "" {
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checkoutOptions := &git.CheckoutOptions{}
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if opts.newRef != "" {
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parentRef, err := repo.r.Reference(opts.parentRef, false)
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require.NoError(t, err)
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checkoutOptions.Create = true
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checkoutOptions.Hash = parentRef.Hash()
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checkoutOptions.Branch = opts.newRef
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} else {
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checkoutOptions.Branch = opts.parentRef
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}
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err = wt.Checkout(checkoutOptions)
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require.NoError(t, err)
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}
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// Yeet all files
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if opts.cleanFiles {
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files, err := wt.Filesystem.ReadDir(".")
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require.NoError(t, err, "failed to get current files")
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for _, fileInfo := range files {
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err = wt.Filesystem.Remove(fileInfo.Name())
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require.NoError(t, err, "failed to remove file %q", fileInfo.Name())
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}
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}
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// Create new files
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for _, fileInfo := range opts.files {
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file, err := wt.Filesystem.Create(fileInfo.path)
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require.NoError(t, err, "failed to create file %q", fileInfo.path)
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_, err = file.Write([]byte(fileInfo.content))
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_ = file.Close()
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require.NoError(t, err, "failed to write content to file %q", fileInfo.path)
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_, err = wt.Add(fileInfo.path)
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require.NoError(t, err, "failed to stage changes to file %q", fileInfo.path)
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}
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// Commit
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commitHash, err := wt.Commit(message, &git.CommitOptions{
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All: true,
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AllowEmptyCommits: true,
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Author: author,
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Committer: author,
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})
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require.NoError(t, err, "failed to commit")
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// Create tags
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for _, tagName := range opts.tags {
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_, err = repo.r.CreateTag(tagName, commitHash, nil)
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require.NoError(t, err, "failed to create tag %q", tagName)
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}
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return nil
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}
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}
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func WithFile(path, content string) CommitOption {
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return func(opts *commitOptions) {
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opts.files = append(opts.files, commitFile{path: path, content: content})
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}
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}
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// WithCleanFiles removes all previous files from the repo. Make sure to leave at least one file in the root
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// directory when switching branches!
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func WithCleanFiles() CommitOption {
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return func(opts *commitOptions) {
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opts.cleanFiles = true
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}
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}
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func AsNewBranch(ref plumbing.ReferenceName) CommitOption {
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return func(opts *commitOptions) {
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opts.newRef = ref
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}
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}
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func OnBranch(ref plumbing.ReferenceName) CommitOption {
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return func(opts *commitOptions) {
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opts.parentRef = ref
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}
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}
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func WithTag(name string) CommitOption {
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return func(opts *commitOptions) {
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opts.tags = append(opts.tags, name)
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}
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}
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// Can be useful to debug git issues by using it in a terminal
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const useOnDiskTestRepository = false
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func WithTestRepo(commits ...TestCommit) TestRepo {
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return func(t *testing.T) *Repository {
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t.Helper()
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repo := &Repository{
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logger: slog.New(slog.NewTextHandler(io.Discard, nil)),
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}
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var err error
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initOptions := git.InitOptions{DefaultBranch: plumbing.Main}
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if useOnDiskTestRepository {
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dir, err := os.MkdirTemp(os.TempDir(), "rp-test-repo-")
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require.NoError(t, err, "failed to create temp directory")
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repo.r, err = git.PlainInitWithOptions(dir, &git.PlainInitOptions{InitOptions: initOptions})
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require.NoError(t, err, "failed to create fs repository")
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fmt.Printf("using temp directory: %s", dir)
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} else {
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repo.r, err = git.InitWithOptions(memory.NewStorage(), memfs.New(), initOptions)
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require.NoError(t, err, "failed to create in-memory repository")
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}
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// Make initial commit
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err = WithCommit("chore: init", WithFile("README.md", "# git test util"))(t, repo)
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require.NoError(t, err, "failed to create init commit")
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for i, commit := range commits {
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err = commit(t, repo)
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require.NoError(t, err, "failed to create commit %d", i)
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}
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return repo
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}
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}
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