[GITEA] new doctor check: fix-push-mirrors-without-git-remote (#1853)

This adds a new `doctor` check: `fix-push-mirrors-without-git-remote`. The new check looks for push mirrors that do not have their remotes configured in git. If automatic fixing is enabled, it will remove these push mirrors from the database.

The check is not run by default, and thus, must be invoked manually. It should be usable in a half-migrated state, too, and as such, fixes #1800.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/1853
Co-authored-by: Gergely Nagy <forgejo@gergo.csillger.hu>
Co-committed-by: Gergely Nagy <forgejo@gergo.csillger.hu>
(cherry picked from commit 9038e07ef3)
(cherry picked from commit b15bafcbc7)
(cherry picked from commit 93ba05a2dd)
(cherry picked from commit e418ea8082)
(cherry picked from commit 321790a91e)
(cherry picked from commit f4e19d3323)

models/migrations/v1_21/v276.go

@@ -4,13 +4,7 @@
 package v1_21 //nolint
 
 import (
-	"context"
-	"fmt"
-	"path/filepath"
-	"strings"
-
-	"code.gitea.io/gitea/modules/git"
-	giturl "code.gitea.io/gitea/modules/git/url"
+	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/modules/setting"
 
 	"xorm.io/xorm"
@@ -73,7 +67,7 @@ func migratePullMirrors(x *xorm.Engine) error {
 		start += len(mirrors)
 
 		for _, m := range mirrors {
-			remoteAddress, err := getRemoteAddress(m.RepoOwner, m.RepoName, "origin")
+			remoteAddress, err := repo_model.GetPushMirrorRemoteAddress(m.RepoOwner, m.RepoName, "origin")
 			if err != nil {
 				return err
 			}
@@ -136,7 +130,7 @@ func migratePushMirrors(x *xorm.Engine) error {
 		start += len(mirrors)
 
 		for _, m := range mirrors {
-			remoteAddress, err := getRemoteAddress(m.RepoOwner, m.RepoName, m.RemoteName)
+			remoteAddress, err := repo_model.GetPushMirrorRemoteAddress(m.RepoOwner, m.RepoName, m.RemoteName)
 			if err != nil {
 				return err
 			}
@@ -160,20 +154,3 @@ func migratePushMirrors(x *xorm.Engine) error {
 
 	return sess.Commit()
 }
-
-func getRemoteAddress(ownerName, repoName, remoteName string) (string, error) {
-	repoPath := filepath.Join(setting.RepoRootPath, strings.ToLower(ownerName), strings.ToLower(repoName)+".git")
-
-	remoteURL, err := git.GetRemoteAddress(context.Background(), repoPath, remoteName)
-	if err != nil {
-		return "", fmt.Errorf("get remote %s's address of %s/%s failed: %v", remoteName, ownerName, repoName, err)
-	}
-
-	u, err := giturl.Parse(remoteURL)
-	if err != nil {
-		return "", err
-	}
-	u.User = nil
-
-	return u.String(), nil
-}

models/repo/pushmirror.go

@@ -5,10 +5,16 @@ package repo
 
 import (
 	"context"
+	"fmt"
+	"path/filepath"
+	"strings"
 	"time"
 
 	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/git"
+	giturl "code.gitea.io/gitea/modules/git/url"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/util"
 
@@ -129,3 +135,21 @@ func PushMirrorsIterate(ctx context.Context, limit int, f func(idx int, bean any
 	}
 	return sess.Iterate(new(PushMirror), f)
 }
+
+// GetPushMirrorRemoteAddress returns the address of associated with a repository's given remote.
+func GetPushMirrorRemoteAddress(ownerName, repoName, remoteName string) (string, error) {
+	repoPath := filepath.Join(setting.RepoRootPath, strings.ToLower(ownerName), strings.ToLower(repoName)+".git")
+
+	remoteURL, err := git.GetRemoteAddress(context.Background(), repoPath, remoteName)
+	if err != nil {
+		return "", fmt.Errorf("get remote %s's address of %s/%s failed: %v", remoteName, ownerName, repoName, err)
+	}
+
+	u, err := giturl.Parse(remoteURL)
+	if err != nil {
+		return "", err
+	}
+	u.User = nil
+
+	return u.String(), nil
+}

modules/doctor/push_mirror_consistency.go

@@ -0,0 +1,91 @@
+// Copyright 2023 The Forgejo Authors c/o Codeberg e.V.. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package doctor
+
+import (
+	"context"
+	"strings"
+
+	"code.gitea.io/gitea/models/db"
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/modules/log"
+
+	"xorm.io/builder"
+)
+
+func FixPushMirrorsWithoutGitRemote(ctx context.Context, logger log.Logger, autofix bool) error {
+	var missingMirrors []*repo_model.PushMirror
+
+	err := db.Iterate(ctx, builder.Gt{"id": 0}, func(ctx context.Context, repo *repo_model.Repository) error {
+		pushMirrors, _, err := repo_model.GetPushMirrorsByRepoID(ctx, repo.ID, db.ListOptions{})
+		if err != nil {
+			return err
+		}
+
+		for i := 0; i < len(pushMirrors); i++ {
+			_, err = repo_model.GetPushMirrorRemoteAddress(repo.OwnerName, repo.Name, pushMirrors[i].RemoteName)
+			if err != nil {
+				if strings.Contains(err.Error(), "No such remote") {
+					missingMirrors = append(missingMirrors, pushMirrors[i])
+				} else if logger != nil {
+					logger.Warn("Unable to retrieve the remote address of a mirror: %s", err)
+				}
+			}
+		}
+
+		return nil
+	})
+	if err != nil {
+		if logger != nil {
+			logger.Critical("Unable to iterate across repounits to fix push mirrors without a git remote: Error %v", err)
+		}
+		return err
+	}
+
+	count := len(missingMirrors)
+	if !autofix {
+		if logger != nil {
+			if count == 0 {
+				logger.Info("Found no push mirrors with missing git remotes")
+			} else {
+				logger.Warn("Found %d push mirrors with missing git remotes", count)
+			}
+		}
+		return nil
+	}
+
+	for i := 0; i < len(missingMirrors); i++ {
+		if logger != nil {
+			logger.Info("Removing push mirror #%d (remote: %s), for repo: %s/%s",
+				missingMirrors[i].ID,
+				missingMirrors[i].RemoteName,
+				missingMirrors[i].GetRepository(ctx).OwnerName,
+				missingMirrors[i].GetRepository(ctx).Name)
+		}
+
+		err = repo_model.DeletePushMirrors(ctx, repo_model.PushMirrorOptions{
+			ID:         missingMirrors[i].ID,
+			RepoID:     missingMirrors[i].RepoID,
+			RemoteName: missingMirrors[i].RemoteName,
+		})
+		if err != nil {
+			if logger != nil {
+				logger.Critical("Error removing a push mirror (repo_id: %d, push_mirror: %d): %s", missingMirrors[i].Repo.ID, missingMirrors[i].ID, err)
+			}
+			return err
+		}
+	}
+
+	return nil
+}
+
+func init() {
+	Register(&Check{
+		Title:     "Check for push mirrors without a git remote configured",
+		Name:      "fix-push-mirrors-without-git-remote",
+		IsDefault: false,
+		Run:       FixPushMirrorsWithoutGitRemote,
+		Priority:  7,
+	})
+}

tests/integration/mirror_push_test.go

@@ -16,6 +16,7 @@ import (
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
 	gitea_context "code.gitea.io/gitea/modules/context"
+	doctor "code.gitea.io/gitea/modules/doctor"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/services/migrations"
@@ -47,10 +48,11 @@ func testMirrorPush(t *testing.T, u *url.URL) {
 	ctx := NewAPITestContext(t, user.LowerName, srcRepo.Name)
 
 	doCreatePushMirror(ctx, fmt.Sprintf("%s%s/%s", u.String(), url.PathEscape(ctx.Username), url.PathEscape(mirrorRepo.Name)), user.LowerName, userPassword)(t)
+	doCreatePushMirror(ctx, fmt.Sprintf("%s%s/%s", u.String(), url.PathEscape(ctx.Username), url.PathEscape("does-not-matter")), user.LowerName, userPassword)(t)
 
 	mirrors, _, err := repo_model.GetPushMirrorsByRepoID(db.DefaultContext, srcRepo.ID, db.ListOptions{})
 	assert.NoError(t, err)
-	assert.Len(t, mirrors, 1)
+	assert.Len(t, mirrors, 2)
 
 	ok := mirror_service.SyncPushMirror(context.Background(), mirrors[0].ID)
 	assert.True(t, ok)
@@ -71,6 +73,30 @@ func testMirrorPush(t *testing.T, u *url.URL) {
 
 	assert.Equal(t, srcCommit.ID, mirrorCommit.ID)
 
+	// Test that we can "repair" push mirrors where the remote doesn't exist in git's state.
+	// To do that, we artificially remove the remote...
+	cmd := git.NewCommand(db.DefaultContext, "remote", "rm").AddDynamicArguments(mirrors[0].RemoteName)
+	_, _, err = cmd.RunStdString(&git.RunOpts{Dir: srcRepo.RepoPath()})
+	assert.NoError(t, err)
+
+	// ...then ensure that trying to get its remote address fails
+	_, err = repo_model.GetPushMirrorRemoteAddress(srcRepo.OwnerName, srcRepo.Name, mirrors[0].RemoteName)
+	assert.Error(t, err)
+
+	// ...and that we can fix it.
+	err = doctor.FixPushMirrorsWithoutGitRemote(db.DefaultContext, nil, true)
+	assert.NoError(t, err)
+
+	// ...and after fixing, we only have one remote
+	mirrors, _, err = repo_model.GetPushMirrorsByRepoID(db.DefaultContext, srcRepo.ID, db.ListOptions{})
+	assert.NoError(t, err)
+	assert.Len(t, mirrors, 1)
+
+	// ...one we can get the address of, and it's not the one we removed
+	remoteAddress, err := repo_model.GetPushMirrorRemoteAddress(srcRepo.OwnerName, srcRepo.Name, mirrors[0].RemoteName)
+	assert.NoError(t, err)
+	assert.Contains(t, remoteAddress, "does-not-matter")
+
 	// Cleanup
 	doRemovePushMirror(ctx, fmt.Sprintf("%s%s/%s", u.String(), url.PathEscape(ctx.Username), url.PathEscape(mirrorRepo.Name)), user.LowerName, userPassword, int(mirrors[0].ID))(t)
 	mirrors, _, err = repo_model.GetPushMirrorsByRepoID(db.DefaultContext, srcRepo.ID, db.ListOptions{})