Interpolate runs-on with variables when scheduling tasks (#30640)

Follow #29468
1. Interpolate runs-on with variables when scheduling tasks.
2. The `GetVariablesOfRun` function will check if the `Repo` of the run
is nil.

---------

Co-authored-by: Giteabot <teabot@gitea.io>

models/actions/run.go

@@ -98,13 +98,10 @@ func (run *ActionRun) LoadAttributes(ctx context.Context) error {
 		return nil
 	}
 
-	if run.Repo == nil {
-		repo, err := repo_model.GetRepositoryByID(ctx, run.RepoID)
-		if err != nil {
-			return err
-		}
-		run.Repo = repo
+	if err := run.LoadRepo(ctx); err != nil {
+		return err
 	}
+
 	if err := run.Repo.LoadAttributes(ctx); err != nil {
 		return err
 	}
@@ -120,6 +117,19 @@ func (run *ActionRun) LoadAttributes(ctx context.Context) error {
 	return nil
 }
 
+func (run *ActionRun) LoadRepo(ctx context.Context) error {
+	if run == nil || run.Repo != nil {
+		return nil
+	}
+
+	repo, err := repo_model.GetRepositoryByID(ctx, run.RepoID)
+	if err != nil {
+		return err
+	}
+	run.Repo = repo
+	return nil
+}
+
 func (run *ActionRun) Duration() time.Duration {
 	return calculateDuration(run.Started, run.Stopped, run.Status) + run.PreviousDuration
 }

models/actions/variable.go

@@ -92,6 +92,11 @@ func DeleteVariable(ctx context.Context, id int64) error {
 func GetVariablesOfRun(ctx context.Context, run *ActionRun) (map[string]string, error) {
 	variables := map[string]string{}
 
+	if err := run.LoadRepo(ctx); err != nil {
+		log.Error("LoadRepo: %v", err)
+		return nil, err
+	}
+
 	// Global
 	globalVariables, err := db.Find[ActionVariable](ctx, FindVariablesOpts{})
 	if err != nil {

services/actions/schedule_tasks.go

@@ -132,8 +132,14 @@ func CreateScheduleTask(ctx context.Context, cron *actions_model.ActionSchedule)
 		Status:        actions_model.StatusWaiting,
 	}
 
+	vars, err := actions_model.GetVariablesOfRun(ctx, run)
+	if err != nil {
+		log.Error("GetVariablesOfRun: %v", err)
+		return err
+	}
+
 	// Parse the workflow specification from the cron schedule
-	workflows, err := jobparser.Parse(cron.Content)
+	workflows, err := jobparser.Parse(cron.Content, jobparser.WithVars(vars))
 	if err != nil {
 		return err
 	}