Fix bugs in rerunning jobs (#29955)

Fix #28761
Fix #27884
Fix #28093

## Changes

### Rerun all jobs
When rerun all jobs, status of the jobs with `needs` will be set to
`blocked` instead of `waiting`. Therefore, these jobs will not run until
the required jobs are completed.

### Rerun a single job
When a single job is rerun, its dependents should also be rerun, just
like GitHub does
(https://github.com/go-gitea/gitea/issues/28761#issuecomment-2008620820).
In this case, only the specified job will be set to `waiting`, its
dependents will be set to `blocked` to wait the job.

### Show warning if every job has `needs`
If every job in a workflow has `needs`, all jobs will be blocked and no
job can be run. So I add a warning message.

<img
src="88f43511-2360-465d-be96-ee92b57ff67b"
width="480px" />

(cherry picked from commit 2f060c5834d81f0317c795fc281f9a07e03e5962)

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)
 		}
 	}

routers/web/repo/actions/view.go

@@ -353,12 +353,25 @@ func Rerun(ctx *context_module.Context) {
 		return
 	}
 
-	if jobIndexStr != "" {
-		jobs = []*actions_model.ActionRunJob{job}
+	if jobIndexStr == "" { // rerun all jobs
+		for _, j := range jobs {
+			// if the job has needs, it should be set to "blocked" status to wait for other jobs
+			shouldBlock := len(j.Needs) > 0
+			if err := rerunJob(ctx, j, shouldBlock); err != nil {
+				ctx.Error(http.StatusInternalServerError, err.Error())
+				return
+			}
+		}
+		ctx.JSON(http.StatusOK, struct{}{})
+		return
 	}
 
-	for _, j := range jobs {
-		if err := rerunJob(ctx, j); err != nil {
+	rerunJobs := actions_service.GetAllRerunJobs(job, jobs)
+
+	for _, j := range rerunJobs {
+		// jobs other than the specified one should be set to "blocked" status
+		shouldBlock := j.JobID != job.JobID
+		if err := rerunJob(ctx, j, shouldBlock); err != nil {
 			ctx.Error(http.StatusInternalServerError, err.Error())
 			return
 		}
@@ -367,7 +380,7 @@ func Rerun(ctx *context_module.Context) {
 	ctx.JSON(http.StatusOK, struct{}{})
 }
 
-func rerunJob(ctx *context_module.Context, job *actions_model.ActionRunJob) error {
+func rerunJob(ctx *context_module.Context, job *actions_model.ActionRunJob, shouldBlock bool) error {
 	status := job.Status
 	if !status.IsDone() {
 		return nil
@@ -375,6 +388,9 @@ func rerunJob(ctx *context_module.Context, job *actions_model.ActionRunJob) erro
 
 	job.TaskID = 0
 	job.Status = actions_model.StatusWaiting
+	if shouldBlock {
+		job.Status = actions_model.StatusBlocked
+	}
 	job.Started = 0
 	job.Stopped = 0