Add branch auto deletion for scheduled PRs

models/forgejo_migrations/migrate.go

@@ -82,6 +82,8 @@ var migrations = []*Migration{
 	NewMigration("Add SSH keypair to `pull_mirror` table", AddSSHKeypairToPushMirror),
 	// v22 -> v23
 	NewMigration("Add `legacy` to `web_authn_credential` table", AddLegacyToWebAuthnCredential),
+	// v23 -> v24
+	NewMigration("Add `delete_branch_after_merge` to `auto_merge` table", AddDeleteBranchAfterMergeToAutoMerge),
 }
 
 // GetCurrentDBVersion returns the current Forgejo database version.

models/forgejo_migrations/v23.go

@@ -0,0 +1,16 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package forgejo_migrations //nolint:revive
+
+import "xorm.io/xorm"
+
+// AddDeleteBranchAfterMergeToAutoMerge: add DeleteBranchAfterMerge column, setting existing rows to false
+func AddDeleteBranchAfterMergeToAutoMerge(x *xorm.Engine) error {
+	type AutoMerge struct {
+		ID                     int64 `xorm:"pk autoincr"`
+		DeleteBranchAfterMerge bool  `xorm:"NOT NULL DEFAULT false"`
+	}
+
+	return x.Sync(&AutoMerge{})
+}

models/pull/automerge.go

@@ -21,6 +21,7 @@ type AutoMerge struct {
 	Doer                   *user_model.User      `xorm:"-"`
 	MergeStyle             repo_model.MergeStyle `xorm:"varchar(30)"`
 	Message                string                `xorm:"LONGTEXT"`
+	DeleteBranchAfterMerge bool                  `xorm:"NOT NULL DEFAULT false"`
 	CreatedUnix            timeutil.TimeStamp    `xorm:"created"`
 }
 
@@ -49,7 +50,7 @@ func IsErrAlreadyScheduledToAutoMerge(err error) bool {
 }
 
 // ScheduleAutoMerge schedules a pull request to be merged when all checks succeed
-func ScheduleAutoMerge(ctx context.Context, doer *user_model.User, pullID int64, style repo_model.MergeStyle, message string) error {
+func ScheduleAutoMerge(ctx context.Context, doer *user_model.User, pullID int64, style repo_model.MergeStyle, message string, deleteBranch bool) error {
 	// Check if we already have a merge scheduled for that pull request
 	if exists, _, err := GetScheduledMergeByPullID(ctx, pullID); err != nil {
 		return err
@@ -62,6 +63,7 @@ func ScheduleAutoMerge(ctx context.Context, doer *user_model.User, pullID int64,
 		PullID:                 pullID,
 		MergeStyle:             style,
 		Message:                message,
+		DeleteBranchAfterMerge: deleteBranch,
 	})
 	return err
 }

routers/api/v1/repo/pull.go

@@ -989,7 +989,7 @@ func MergePullRequest(ctx *context.APIContext) {
 	}
 
 	if form.MergeWhenChecksSucceed {
-		scheduled, err := automerge.ScheduleAutoMerge(ctx, ctx.Doer, pr, repo_model.MergeStyle(form.Do), message)
+		scheduled, err := automerge.ScheduleAutoMerge(ctx, ctx.Doer, pr, repo_model.MergeStyle(form.Do), message, form.DeleteBranchAfterMerge)
 		if err != nil {
 			if pull_model.IsErrAlreadyScheduledToAutoMerge(err) {
 				ctx.Error(http.StatusConflict, "ScheduleAutoMerge", err)

routers/private/hook_post_receive_test.go

@@ -28,7 +28,7 @@ func TestHandlePullRequestMerging(t *testing.T) {
 
 	user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
 
-	err = pull_model.ScheduleAutoMerge(db.DefaultContext, user1, pr.ID, repo_model.MergeStyleSquash, "squash merge a pr")
+	err = pull_model.ScheduleAutoMerge(db.DefaultContext, user1, pr.ID, repo_model.MergeStyleSquash, "squash merge a pr", false)
 	require.NoError(t, err)
 
 	autoMerge := unittest.AssertExistsAndLoadBean(t, &pull_model.AutoMerge{PullID: pr.ID})

routers/web/repo/pull.go

@@ -1302,7 +1302,7 @@ func MergePullRequest(ctx *context.Context) {
 		// delete all scheduled auto merges
 		_ = pull_model.DeleteScheduledAutoMerge(ctx, pr.ID)
 		// schedule auto merge
-		scheduled, err := automerge.ScheduleAutoMerge(ctx, ctx.Doer, pr, repo_model.MergeStyle(form.Do), message)
+		scheduled, err := automerge.ScheduleAutoMerge(ctx, ctx.Doer, pr, repo_model.MergeStyle(form.Do), message, form.DeleteBranchAfterMerge)
 		if err != nil {
 			ctx.ServerError("ScheduleAutoMerge", err)
 			return

services/automerge/automerge.go

@@ -22,6 +22,7 @@ import (
 	"code.gitea.io/gitea/modules/queue"
 	notify_service "code.gitea.io/gitea/services/notify"
 	pull_service "code.gitea.io/gitea/services/pull"
+	repo_service "code.gitea.io/gitea/services/repository"
 	shared_automerge "code.gitea.io/gitea/services/shared/automerge"
 )
 
@@ -52,9 +53,9 @@ func handler(items ...string) []string {
 }
 
 // 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) {
+func ScheduleAutoMerge(ctx context.Context, doer *user_model.User, pull *issues_model.PullRequest, style repo_model.MergeStyle, message string, deleteBranch bool) (scheduled bool, err error) {
 	err = db.WithTx(ctx, func(ctx context.Context) error {
-		if err := pull_model.ScheduleAutoMerge(ctx, doer, pull.ID, style, message); err != nil {
+		if err := pull_model.ScheduleAutoMerge(ctx, doer, pull.ID, style, message, deleteBranch); err != nil {
 			return err
 		}
 		scheduled = true
@@ -210,4 +211,11 @@ func handlePullRequestAutoMerge(pullID int64, sha string) {
 		// on the pull request page. But this should not be finished in a bug fix PR which will be backport to release branch.
 		return
 	}
+
+	if scheduledPRM.DeleteBranchAfterMerge {
+		err := repo_service.DeleteBranchAfterMerge(ctx, doer, pr, headGitRepo)
+		if err != nil {
+			log.Error("%d repo_service.DeleteBranchIfUnused: %v", pr.ID, err)
+		}
+	}
 }

tests/integration/actions_commit_status_test.go

@@ -34,7 +34,7 @@ func TestActionsAutomerge(t *testing.T) {
 		assert.False(t, pr.HasMerged, "PR should not be merged")
 		assert.Equal(t, issues_model.PullRequestStatusMergeable, pr.Status, "PR should be mergeable")
 
-		scheduled, err := automerge.ScheduleAutoMerge(ctx, user, pr, repo_model.MergeStyleMerge, "Dummy")
+		scheduled, err := automerge.ScheduleAutoMerge(ctx, user, pr, repo_model.MergeStyleMerge, "Dummy", false)
 
 		require.NoError(t, err, "PR should be scheduled for automerge")
 		assert.True(t, scheduled, "PR should be scheduled for automerge")

tests/integration/pull_merge_test.go

@@ -881,12 +881,12 @@ func TestPullAutoMergeAfterCommitStatusSucceed(t *testing.T) {
 		session.MakeRequest(t, req, http.StatusSeeOther)
 
 		// first time insert automerge record, return true
-		scheduled, err := automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test")
+		scheduled, err := automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
 		require.NoError(t, err)
 		assert.True(t, scheduled)
 
 		// second time insert automerge record, return false because it does exist
-		scheduled, err = automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test")
+		scheduled, err = automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
 		require.Error(t, err)
 		assert.False(t, scheduled)
 
@@ -965,12 +965,12 @@ func TestPullAutoMergeAfterCommitStatusSucceedAndApproval(t *testing.T) {
 		session.MakeRequest(t, req, http.StatusSeeOther)
 
 		// first time insert automerge record, return true
-		scheduled, err := automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test")
+		scheduled, err := automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
 		require.NoError(t, err)
 		assert.True(t, scheduled)
 
 		// second time insert automerge record, return false because it does exist
-		scheduled, err = automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test")
+		scheduled, err = automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
 		require.Error(t, err)
 		assert.False(t, scheduled)
 
@@ -1094,12 +1094,12 @@ func TestPullAutoMergeAfterCommitStatusSucceedAndApprovalForAgitFlow(t *testing.
 
 		user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
 		// first time insert automerge record, return true
-		scheduled, err := automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test")
+		scheduled, err := automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
 		require.NoError(t, err)
 		assert.True(t, scheduled)
 
 		// second time insert automerge record, return false because it does exist
-		scheduled, err = automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test")
+		scheduled, err = automerge.ScheduleAutoMerge(db.DefaultContext, user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
 		require.Error(t, err)
 		assert.False(t, scheduled)
 

web_src/js/components/PullRequestMergeForm.vue

@@ -130,7 +130,7 @@ export default {
         {{ mergeForm.textCancel }}
       </button>
 
-      <div class="ui checkbox tw-ml-1" v-if="mergeForm.isPullBranchDeletable && !autoMergeWhenSucceed">
+      <div class="ui checkbox tw-ml-1" v-if="mergeForm.isPullBranchDeletable">
         <input name="delete_branch_after_merge" type="checkbox" v-model="deleteBranchAfterMerge" id="delete-branch-after-merge">
         <label for="delete-branch-after-merge">{{ mergeForm.textDeleteBranch }}</label>
       </div>