mirror of
https://github.com/go-gitea/gitea
synced 2024-11-14 22:11:32 +01:00
264 lines
7.6 KiB
Go
264 lines
7.6 KiB
Go
// Copyright 2021 Gitea. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package automerge
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import (
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"context"
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"errors"
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"fmt"
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"strconv"
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"strings"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/models/db"
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access_model "code.gitea.io/gitea/models/perm/access"
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pull_model "code.gitea.io/gitea/models/pull"
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repo_model "code.gitea.io/gitea/models/repo"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/graceful"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/process"
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"code.gitea.io/gitea/modules/queue"
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pull_service "code.gitea.io/gitea/services/pull"
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)
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// prAutoMergeQueue represents a queue to handle update pull request tests
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var prAutoMergeQueue queue.UniqueQueue
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// Init runs the task queue to that handles auto merges
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func Init() error {
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prAutoMergeQueue = queue.CreateUniqueQueue("pr_auto_merge", handle, "")
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if prAutoMergeQueue == nil {
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return fmt.Errorf("Unable to create pr_auto_merge Queue")
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}
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go graceful.GetManager().RunWithShutdownFns(prAutoMergeQueue.Run)
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return nil
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}
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// handle passed PR IDs and test the PRs
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func handle(data ...queue.Data) []queue.Data {
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for _, d := range data {
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var id int64
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var sha string
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if _, err := fmt.Sscanf(d.(string), "%d_%s", &id, &sha); err != nil {
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log.Error("could not parse data from pr_auto_merge queue (%v): %v", d, err)
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continue
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}
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handlePull(id, sha)
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}
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return nil
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}
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func addToQueue(pr *models.PullRequest, sha string) {
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if err := prAutoMergeQueue.PushFunc(fmt.Sprintf("%d_%s", pr.ID, sha), func() error {
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log.Trace("Adding pullID: %d to the pull requests patch checking queue with sha %s", pr.ID, sha)
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return nil
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}); err != nil {
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log.Error("Error adding pullID: %d to the pull requests patch checking queue %v", pr.ID, err)
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}
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}
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// ScheduleAutoMerge if schedule is false and no error, pull can be merged directly
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func ScheduleAutoMerge(ctx context.Context, doer *user_model.User, pull *models.PullRequest, style repo_model.MergeStyle, message string) (scheduled bool, err error) {
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err = db.WithTx(func(ctx context.Context) error {
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lastCommitStatus, err := pull_service.GetPullRequestCommitStatusState(ctx, pull)
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if err != nil {
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return err
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}
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// we don't need to schedule
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if lastCommitStatus.IsSuccess() {
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return nil
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}
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if err := pull_model.ScheduleAutoMerge(ctx, doer, pull.ID, style, message); err != nil {
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return err
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}
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scheduled = true
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_, err = models.CreateAutoMergeComment(ctx, models.CommentTypePRScheduledToAutoMerge, pull, doer)
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return err
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}, ctx)
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return
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}
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// RemoveScheduledAutoMerge cancels a previously scheduled pull request
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func RemoveScheduledAutoMerge(ctx context.Context, doer *user_model.User, pull *models.PullRequest) error {
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return db.WithTx(func(ctx context.Context) error {
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if err := pull_model.DeleteScheduledAutoMerge(ctx, pull.ID); err != nil {
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return err
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}
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_, err := models.CreateAutoMergeComment(ctx, models.CommentTypePRUnScheduledToAutoMerge, pull, doer)
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return err
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}, ctx)
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}
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// MergeScheduledPullRequest merges a previously scheduled pull request when all checks succeeded
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func MergeScheduledPullRequest(ctx context.Context, sha string, repo *repo_model.Repository) error {
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pulls, err := getPullRequestsByHeadSHA(ctx, sha, repo, func(pr *models.PullRequest) bool {
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return !pr.HasMerged && pr.CanAutoMerge()
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})
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if err != nil {
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return err
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}
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for _, pr := range pulls {
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addToQueue(pr, sha)
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}
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return nil
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}
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func getPullRequestsByHeadSHA(ctx context.Context, sha string, repo *repo_model.Repository, filter func(*models.PullRequest) bool) (map[int64]*models.PullRequest, error) {
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gitRepo, err := git.OpenRepository(ctx, repo.RepoPath())
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if err != nil {
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return nil, err
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}
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defer gitRepo.Close()
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refs, err := gitRepo.GetRefsBySha(sha, "")
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if err != nil {
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return nil, err
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}
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pulls := make(map[int64]*models.PullRequest)
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for _, ref := range refs {
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// Each pull branch starts with refs/pull/ we then go from there to find the index of the pr and then
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// use that to get the pr.
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if strings.HasPrefix(ref, git.PullPrefix) {
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parts := strings.Split(ref[len(git.PullPrefix):], "/")
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// e.g. 'refs/pull/1/head' would be []string{"1", "head"}
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if len(parts) != 2 {
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log.Error("getPullRequestsByHeadSHA found broken pull ref [%s] on repo [%-v]", ref, repo)
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continue
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}
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prIndex, err := strconv.ParseInt(parts[0], 10, 64)
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if err != nil {
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log.Error("getPullRequestsByHeadSHA found broken pull ref [%s] on repo [%-v]", ref, repo)
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continue
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}
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p, err := models.GetPullRequestByIndexCtx(ctx, repo.ID, prIndex)
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if err != nil {
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// If there is no pull request for this branch, we don't try to merge it.
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if models.IsErrPullRequestNotExist(err) {
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continue
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}
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return nil, err
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}
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if filter(p) {
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pulls[p.ID] = p
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}
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}
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}
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return pulls, nil
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}
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func handlePull(pullID int64, sha string) {
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ctx, _, finished := process.GetManager().AddContext(graceful.GetManager().HammerContext(),
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fmt.Sprintf("Handle AutoMerge of pull[%d] with sha[%s]", pullID, sha))
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defer finished()
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pr, err := models.GetPullRequestByID(ctx, pullID)
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if err != nil {
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log.Error("GetPullRequestByID[%d]: %v", pullID, err)
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return
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}
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// Check if there is a scheduled pr in the db
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exists, scheduledPRM, err := pull_model.GetScheduledMergeByPullID(ctx, pr.ID)
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if err != nil {
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log.Error("pull[%d] GetScheduledMergeByPullID: %v", pr.ID, err)
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return
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}
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if !exists {
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return
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}
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// Get all checks for this pr
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// We get the latest sha commit hash again to handle the case where the check of a previous push
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// did not succeed or was not finished yet.
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if err = pr.LoadHeadRepoCtx(ctx); err != nil {
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log.Error("pull[%d] LoadHeadRepoCtx: %v", pr.ID, err)
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return
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}
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headGitRepo, err := git.OpenRepository(ctx, pr.HeadRepo.RepoPath())
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if err != nil {
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log.Error("OpenRepository: %v", err)
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return
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}
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defer headGitRepo.Close()
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headBranchExist := headGitRepo.IsBranchExist(pr.HeadBranch)
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if pr.HeadRepo == nil || !headBranchExist {
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log.Warn("Head branch of auto merge pr does not exist [HeadRepoID: %d, Branch: %s, PR ID: %d]", pr.HeadRepoID, pr.HeadBranch, pr.ID)
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return
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}
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// Check if all checks succeeded
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pass, err := pull_service.IsPullCommitStatusPass(ctx, pr)
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if err != nil {
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log.Error("IsPullCommitStatusPass: %v", err)
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return
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}
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if !pass {
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log.Info("Scheduled auto merge pr has unsuccessful status checks [PullID: %d]", pr.ID)
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return
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}
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// Merge if all checks succeeded
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doer, err := user_model.GetUserByIDCtx(ctx, scheduledPRM.DoerID)
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if err != nil {
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log.Error("GetUserByIDCtx: %v", err)
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return
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}
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perm, err := access_model.GetUserRepoPermission(ctx, pr.HeadRepo, doer)
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if err != nil {
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log.Error("GetUserRepoPermission: %v", err)
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return
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}
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if err := pull_service.CheckPullMergable(ctx, doer, &perm, pr, false, false); err != nil {
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if errors.Is(pull_service.ErrUserNotAllowedToMerge, err) {
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log.Info("PR %d was scheduled to automerge by an unauthorized user", pr.ID)
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return
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}
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log.Error("pull[%d] CheckPullMergable: %v", pr.ID, err)
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return
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}
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var baseGitRepo *git.Repository
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if pr.BaseRepoID == pr.HeadRepoID {
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baseGitRepo = headGitRepo
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} else {
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if err = pr.LoadBaseRepoCtx(ctx); err != nil {
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log.Error("LoadBaseRepoCtx: %v", err)
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return
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}
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baseGitRepo, err = git.OpenRepository(ctx, pr.BaseRepo.RepoPath())
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if err != nil {
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log.Error("OpenRepository: %v", err)
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return
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}
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defer baseGitRepo.Close()
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}
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if err := pull_service.Merge(ctx, pr, doer, baseGitRepo, scheduledPRM.MergeStyle, "", scheduledPRM.Message); err != nil {
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log.Error("pull_service.Merge: %v", err)
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return
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}
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}
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