Support reflogs (#22451)

This PR adds support for reflogs on all repositories. It does this by
adding a global configuration entry.

Implements #14865

---------

Signed-off-by: Philip Peterson <philip.c.peterson@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/modules/git/git.go b/modules/git/git.go
index 24cfea8c7f..a31afc077a 100644
--- a/modules/git/git.go
+++ b/modules/git/git.go
@@ -201,6 +201,23 @@ func InitFull(ctx context.Context) (err error) {
 	return syncGitConfig()
 }
 
+func enableReflogs() error {
+	if err := configSet("core.logAllRefUpdates", "true"); err != nil {
+		return err
+	}
+	err := configSet("gc.reflogExpire", fmt.Sprintf("%d", setting.Git.Reflog.Expiration))
+	return err
+}
+
+func disableReflogs() error {
+	if err := configUnsetAll("core.logAllRefUpdates", "true"); err != nil {
+		return err
+	} else if err := configUnsetAll("gc.reflogExpire", ""); err != nil {
+		return err
+	}
+	return nil
+}
+
 // syncGitConfig only modifies gitconfig, won't change global variables (otherwise there will be data-race problem)
 func syncGitConfig() (err error) {
 	if err = os.MkdirAll(HomeDir(), os.ModePerm); err != nil {
@@ -224,6 +241,16 @@ func syncGitConfig() (err error) {
 		return err
 	}
 
+	if setting.Git.Reflog.Enabled {
+		if err := enableReflogs(); err != nil {
+			return err
+		}
+	} else {
+		if err := disableReflogs(); err != nil {
+			return err
+		}
+	}
+
 	if CheckGitVersionAtLeast("2.10") == nil {
 		if err := configSet("receive.advertisePushOptions", "true"); err != nil {
 			return err