blob: b57f791f980aa3e3470c0a5a5effe098e485569d [file] [log] [blame]
// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package task
import (
"context"
"errors"
"fmt"
"io"
"strings"
"golang.org/x/build/gerrit"
wf "golang.org/x/build/internal/workflow"
)
type GerritClient interface {
// CreateAutoSubmitChange creates a change with the given metadata and
// contents, sets Run-TryBots and Auto-Submit, and returns its change ID.
// If the content of a file is empty, that file will be deleted from the repository.
// If the requested contents match the state of the repository, no change
// is created and the returned change ID will be empty.
// Reviewers is the username part of a google.com or golang.org email address.
CreateAutoSubmitChange(ctx *wf.TaskContext, input gerrit.ChangeInput, reviewers []string, contents map[string]string) (string, error)
// Submitted checks if the specified change has been submitted or failed
// trybots. If the CL is submitted, returns the submitted commit hash.
// If parentCommit is non-empty, the submitted CL's parent must match it.
Submitted(ctx context.Context, changeID, parentCommit string) (string, bool, error)
// GetTag returns tag information for a specified tag.
GetTag(ctx context.Context, project, tag string) (gerrit.TagInfo, error)
// Tag creates a tag on project at the specified commit.
Tag(ctx context.Context, project, tag, commit string) error
// ListTags returns all the tags on project.
ListTags(ctx context.Context, project string) ([]string, error)
// ReadBranchHead returns the head of a branch in project.
ReadBranchHead(ctx context.Context, project, branch string) (string, error)
// ListProjects lists all the projects on the server.
ListProjects(ctx context.Context) ([]string, error)
// ReadFile reads a file from project at the specified commit.
ReadFile(ctx context.Context, project, commit, file string) ([]byte, error)
// GetCommitsInRefs gets refs in which the specified commits were merged into.
GetCommitsInRefs(ctx context.Context, project string, commits, refs []string) (map[string][]string, error)
}
type RealGerritClient struct {
Client *gerrit.Client
}
func (c *RealGerritClient) CreateAutoSubmitChange(ctx *wf.TaskContext, input gerrit.ChangeInput, reviewers []string, files map[string]string) (_ string, err error) {
defer func() {
// Check if status code is known to be not retryable.
if he := (*gerrit.HTTPError)(nil); errors.As(err, &he) && he.Res.StatusCode/100 == 4 {
ctx.DisableRetries()
}
}()
reviewerEmails, err := coordinatorEmails(reviewers)
if err != nil {
return "", err
}
change, err := c.Client.CreateChange(ctx, input)
if err != nil {
return "", err
}
changeID := fmt.Sprintf("%s~%d", change.Project, change.ChangeNumber)
anyChange := false
for path, content := range files {
var err error
if content == "" {
err = c.Client.DeleteFileInChangeEdit(ctx, changeID, path)
} else {
err = c.Client.ChangeFileContentInChangeEdit(ctx, changeID, path, content)
}
if errors.Is(err, gerrit.ErrNotModified) {
continue
}
if err != nil {
return "", err
}
anyChange = true
}
if !anyChange {
if err := c.Client.AbandonChange(ctx, changeID, "no changes necessary"); err != nil {
return "", err
}
return "", nil
}
if err := c.Client.PublishChangeEdit(ctx, changeID); err != nil {
return "", err
}
var reviewerInputs []gerrit.ReviewerInput
for _, r := range reviewerEmails {
reviewerInputs = append(reviewerInputs, gerrit.ReviewerInput{Reviewer: r})
}
if err := c.Client.SetReview(ctx, changeID, "current", gerrit.ReviewInput{
Labels: map[string]int{
"Run-TryBot": 1,
"Auto-Submit": 1,
},
Reviewers: reviewerInputs,
}); err != nil {
return "", err
}
return changeID, nil
}
func (c *RealGerritClient) Submitted(ctx context.Context, changeID, parentCommit string) (string, bool, error) {
detail, err := c.Client.GetChangeDetail(ctx, changeID, gerrit.QueryChangesOpt{
Fields: []string{"CURRENT_REVISION", "DETAILED_LABELS", "CURRENT_COMMIT"},
})
if err != nil {
return "", false, err
}
if detail.Status == "MERGED" {
parents := detail.Revisions[detail.CurrentRevision].Commit.Parents
if parentCommit != "" && (len(parents) != 1 || parents[0].CommitID != parentCommit) {
return "", false, fmt.Errorf("expected merged CL %v to have one parent commit %v, has %v", ChangeLink(changeID), parentCommit, parents)
}
return detail.CurrentRevision, true, nil
}
for _, approver := range detail.Labels["TryBot-Result"].All {
if approver.Value < 0 {
return "", false, fmt.Errorf("trybots failed on %v", ChangeLink(changeID))
}
}
return "", false, nil
}
func (c *RealGerritClient) Tag(ctx context.Context, project, tag, commit string) error {
info, err := c.Client.GetTag(ctx, project, tag)
if err != nil && !errors.Is(err, gerrit.ErrResourceNotExist) {
return fmt.Errorf("checking if tag already exists: %v", err)
}
if err == nil {
if info.Revision != commit {
return fmt.Errorf("tag %q already exists on revision %q rather than our %q", tag, info.Revision, commit)
} else {
// Nothing to do.
return nil
}
}
_, err = c.Client.CreateTag(ctx, project, tag, gerrit.TagInput{
Revision: commit,
})
return err
}
func (c *RealGerritClient) ListTags(ctx context.Context, project string) ([]string, error) {
tags, err := c.Client.GetProjectTags(ctx, project)
if err != nil {
return nil, err
}
var tagNames []string
for _, tag := range tags {
tagNames = append(tagNames, strings.TrimPrefix(tag.Ref, "refs/tags/"))
}
return tagNames, nil
}
func (c *RealGerritClient) GetTag(ctx context.Context, project, tag string) (gerrit.TagInfo, error) {
return c.Client.GetTag(ctx, project, tag)
}
func (c *RealGerritClient) ReadBranchHead(ctx context.Context, project, branch string) (string, error) {
branchInfo, err := c.Client.GetBranch(ctx, project, branch)
if err != nil {
return "", err
}
return branchInfo.Revision, nil
}
func (c *RealGerritClient) ListProjects(ctx context.Context) ([]string, error) {
projects, err := c.Client.ListProjects(ctx)
if err != nil {
return nil, err
}
var names []string
for _, p := range projects {
names = append(names, p.Name)
}
return names, nil
}
func (c *RealGerritClient) ReadFile(ctx context.Context, project, commit, file string) ([]byte, error) {
body, err := c.Client.GetFileContent(ctx, project, commit, file)
if err != nil {
return nil, err
}
defer body.Close()
return io.ReadAll(body)
}
func (c *RealGerritClient) GetCommitsInRefs(ctx context.Context, project string, commits, refs []string) (map[string][]string, error) {
return c.Client.GetCommitsInRefs(ctx, project, commits, refs)
}
// ChangeLink returns a link to the review page for the CL with the specified
// change ID. The change ID must be in the project~cl# form.
func ChangeLink(changeID string) string {
parts := strings.SplitN(changeID, "~", 3)
if len(parts) != 2 {
return fmt.Sprintf("(unparseable change ID %q)", changeID)
}
return "https://go.dev/cl/" + parts[1]
}