[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)

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,
+	})
+}