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forgejo/services/automerge/automerge.go
wxiaoguang 18f26cfbf7
Improve queue and logger context (#24924)
Before there was a "graceful function": RunWithShutdownFns, it's mainly
for some modules which doesn't support context.

The old queue system doesn't work well with context, so the old queues
need it.

After the queue refactoring, the new queue works with context well, so,
use Golang context as much as possible, the `RunWithShutdownFns` could
be removed (replaced by RunWithCancel for context cancel mechanism), the
related code could be simplified.

This PR also fixes some legacy queue-init problems, eg:

* typo : archiver: "unable to create codes indexer queue" => "unable to
create repo-archive queue"
* no nil check for failed queues, which causes unfriendly panic

After this PR, many goroutines could have better display name:

![image](https://github.com/go-gitea/gitea/assets/2114189/701b2a9b-8065-4137-aeaa-0bda2b34604a)

![image](https://github.com/go-gitea/gitea/assets/2114189/f1d5f50f-0534-40f0-b0be-f2c9daa5fe92)
2023-05-26 07:31:55 +00:00

261 lines
7.7 KiB
Go

// Copyright 2021 Gitea. All rights reserved.
// SPDX-License-Identifier: MIT
package automerge
import (
"context"
"errors"
"fmt"
"strconv"
"strings"
"code.gitea.io/gitea/models/db"
issues_model "code.gitea.io/gitea/models/issues"
access_model "code.gitea.io/gitea/models/perm/access"
pull_model "code.gitea.io/gitea/models/pull"
repo_model "code.gitea.io/gitea/models/repo"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/queue"
pull_service "code.gitea.io/gitea/services/pull"
)
// prAutoMergeQueue represents a queue to handle update pull request tests
var prAutoMergeQueue *queue.WorkerPoolQueue[string]
// Init runs the task queue to that handles auto merges
func Init() error {
prAutoMergeQueue = queue.CreateUniqueQueue(graceful.GetManager().ShutdownContext(), "pr_auto_merge", handler)
if prAutoMergeQueue == nil {
return fmt.Errorf("unable to create pr_auto_merge queue")
}
go graceful.GetManager().RunWithCancel(prAutoMergeQueue)
return nil
}
// handle passed PR IDs and test the PRs
func handler(items ...string) []string {
for _, s := range items {
var id int64
var sha string
if _, err := fmt.Sscanf(s, "%d_%s", &id, &sha); err != nil {
log.Error("could not parse data from pr_auto_merge queue (%v): %v", s, err)
continue
}
handlePull(id, sha)
}
return nil
}
func addToQueue(pr *issues_model.PullRequest, sha string) {
log.Trace("Adding pullID: %d to the pull requests patch checking queue with sha %s", pr.ID, sha)
if err := prAutoMergeQueue.Push(fmt.Sprintf("%d_%s", pr.ID, sha)); err != nil {
log.Error("Error adding pullID: %d to the pull requests patch checking queue %v", pr.ID, err)
}
}
// ScheduleAutoMerge if schedule is false and no error, pull can be merged directly
func ScheduleAutoMerge(ctx context.Context, doer *user_model.User, pull *issues_model.PullRequest, style repo_model.MergeStyle, message string) (scheduled bool, err error) {
err = db.WithTx(ctx, func(ctx context.Context) error {
lastCommitStatus, err := pull_service.GetPullRequestCommitStatusState(ctx, pull)
if err != nil {
return err
}
// we don't need to schedule
if lastCommitStatus.IsSuccess() {
return nil
}
if err := pull_model.ScheduleAutoMerge(ctx, doer, pull.ID, style, message); err != nil {
return err
}
scheduled = true
_, err = issues_model.CreateAutoMergeComment(ctx, issues_model.CommentTypePRScheduledToAutoMerge, pull, doer)
return err
})
return scheduled, err
}
// RemoveScheduledAutoMerge cancels a previously scheduled pull request
func RemoveScheduledAutoMerge(ctx context.Context, doer *user_model.User, pull *issues_model.PullRequest) error {
return db.WithTx(ctx, func(ctx context.Context) error {
if err := pull_model.DeleteScheduledAutoMerge(ctx, pull.ID); err != nil {
return err
}
_, err := issues_model.CreateAutoMergeComment(ctx, issues_model.CommentTypePRUnScheduledToAutoMerge, pull, doer)
return err
})
}
// MergeScheduledPullRequest merges a previously scheduled pull request when all checks succeeded
func MergeScheduledPullRequest(ctx context.Context, sha string, repo *repo_model.Repository) error {
pulls, err := getPullRequestsByHeadSHA(ctx, sha, repo, func(pr *issues_model.PullRequest) bool {
return !pr.HasMerged && pr.CanAutoMerge()
})
if err != nil {
return err
}
for _, pr := range pulls {
addToQueue(pr, sha)
}
return nil
}
func getPullRequestsByHeadSHA(ctx context.Context, sha string, repo *repo_model.Repository, filter func(*issues_model.PullRequest) bool) (map[int64]*issues_model.PullRequest, error) {
gitRepo, err := git.OpenRepository(ctx, repo.RepoPath())
if err != nil {
return nil, err
}
defer gitRepo.Close()
refs, err := gitRepo.GetRefsBySha(sha, "")
if err != nil {
return nil, err
}
pulls := make(map[int64]*issues_model.PullRequest)
for _, ref := range refs {
// Each pull branch starts with refs/pull/ we then go from there to find the index of the pr and then
// use that to get the pr.
if strings.HasPrefix(ref, git.PullPrefix) {
parts := strings.Split(ref[len(git.PullPrefix):], "/")
// e.g. 'refs/pull/1/head' would be []string{"1", "head"}
if len(parts) != 2 {
log.Error("getPullRequestsByHeadSHA found broken pull ref [%s] on repo [%-v]", ref, repo)
continue
}
prIndex, err := strconv.ParseInt(parts[0], 10, 64)
if err != nil {
log.Error("getPullRequestsByHeadSHA found broken pull ref [%s] on repo [%-v]", ref, repo)
continue
}
p, err := issues_model.GetPullRequestByIndex(ctx, repo.ID, prIndex)
if err != nil {
// If there is no pull request for this branch, we don't try to merge it.
if issues_model.IsErrPullRequestNotExist(err) {
continue
}
return nil, err
}
if filter(p) {
pulls[p.ID] = p
}
}
}
return pulls, nil
}
func handlePull(pullID int64, sha string) {
ctx, _, finished := process.GetManager().AddContext(graceful.GetManager().HammerContext(),
fmt.Sprintf("Handle AutoMerge of PR[%d] with sha[%s]", pullID, sha))
defer finished()
pr, err := issues_model.GetPullRequestByID(ctx, pullID)
if err != nil {
log.Error("GetPullRequestByID[%d]: %v", pullID, err)
return
}
// Check if there is a scheduled pr in the db
exists, scheduledPRM, err := pull_model.GetScheduledMergeByPullID(ctx, pr.ID)
if err != nil {
log.Error("%-v GetScheduledMergeByPullID: %v", pr, err)
return
}
if !exists {
return
}
// Get all checks for this pr
// We get the latest sha commit hash again to handle the case where the check of a previous push
// did not succeed or was not finished yet.
if err = pr.LoadHeadRepo(ctx); err != nil {
log.Error("%-v LoadHeadRepo: %v", pr, err)
return
}
headGitRepo, err := git.OpenRepository(ctx, pr.HeadRepo.RepoPath())
if err != nil {
log.Error("OpenRepository %-v: %v", pr.HeadRepo, err)
return
}
defer headGitRepo.Close()
headBranchExist := headGitRepo.IsBranchExist(pr.HeadBranch)
if pr.HeadRepo == nil || !headBranchExist {
log.Warn("Head branch of auto merge %-v does not exist [HeadRepoID: %d, Branch: %s]", pr, pr.HeadRepoID, pr.HeadBranch)
return
}
// Check if all checks succeeded
pass, err := pull_service.IsPullCommitStatusPass(ctx, pr)
if err != nil {
log.Error("%-v IsPullCommitStatusPass: %v", pr, err)
return
}
if !pass {
log.Info("Scheduled auto merge %-v has unsuccessful status checks", pr)
return
}
// Merge if all checks succeeded
doer, err := user_model.GetUserByID(ctx, scheduledPRM.DoerID)
if err != nil {
log.Error("Unable to get scheduled User[%d]: %v", scheduledPRM.DoerID, err)
return
}
perm, err := access_model.GetUserRepoPermission(ctx, pr.HeadRepo, doer)
if err != nil {
log.Error("GetUserRepoPermission %-v: %v", pr.HeadRepo, err)
return
}
if err := pull_service.CheckPullMergable(ctx, doer, &perm, pr, pull_service.MergeCheckTypeGeneral, false); err != nil {
if errors.Is(pull_service.ErrUserNotAllowedToMerge, err) {
log.Info("%-v was scheduled to automerge by an unauthorized user", pr)
return
}
log.Error("%-v CheckPullMergable: %v", pr, err)
return
}
var baseGitRepo *git.Repository
if pr.BaseRepoID == pr.HeadRepoID {
baseGitRepo = headGitRepo
} else {
if err = pr.LoadBaseRepo(ctx); err != nil {
log.Error("%-v LoadBaseRepo: %v", pr, err)
return
}
baseGitRepo, err = git.OpenRepository(ctx, pr.BaseRepo.RepoPath())
if err != nil {
log.Error("OpenRepository %-v: %v", pr.BaseRepo, err)
return
}
defer baseGitRepo.Close()
}
if err := pull_service.Merge(ctx, pr, doer, baseGitRepo, scheduledPRM.MergeStyle, "", scheduledPRM.Message, true); err != nil {
log.Error("pull_service.Merge: %v", err)
return
}
}