add a warning

options/locale/locale_en-US.ini

@@ -3627,6 +3627,7 @@ runs.scheduled = Scheduled
 runs.pushed_by = pushed by
 runs.invalid_workflow_helper = Workflow config file is invalid. Please check your config file: %s
 runs.no_matching_online_runner_helper = No matching online runner with label: %s
+runs.no_job_without_needs = The workflow must contain at least one job with no dependencies.
 runs.actor = Actor
 runs.status = Status
 runs.actors_no_select = All actors

routers/web/repo/actions/actions.go

@@ -104,8 +104,13 @@ func List(ctx *context.Context) {
  workflows = append(workflows, workflow)
  continue
  }
- // Check whether have matching runner
+ // The workflow must contain at least one job without "needs". Otherwise, a deadlock will occur and no jobs will be able to run.
+ hasJobWithoutNeeds := false
+ // Check whether have matching runner and a job without "needs"
  for _, j := range wf.Jobs {
+ if !hasJobWithoutNeeds && len(j.Needs()) == 0 {
+ hasJobWithoutNeeds = true
+ }
  runsOnList := j.RunsOn()
  for _, ro := range runsOnList {
  if strings.Contains(ro, "${{") {
@@ -123,6 +128,9 @@ func List(ctx *context.Context) {
  break
  }
  }
+ if !hasJobWithoutNeeds {
+ workflow.ErrMsg = ctx.Locale.TrString("actions.runs.no_job_without_needs")
+ }
  workflows = append(workflows, workflow)
  }
  }