Avoid too long names for actions (go-gitea#23162)

The name of the job or step comes from the workflow file, while the name
of the runner comes from its registration. If the strings used for these
names are too long, they could cause db issues.

models/actions/run.go

@@ -194,6 +194,7 @@ func InsertRun(ctx context.Context, run *ActionRun, jobs []*jobparser.SingleWork
 		if len(needs) > 0 {
 			status = StatusBlocked
 		}
+		job.Name, _ = util.SplitStringAtByteN(job.Name, 255)
 		runJobs = append(runJobs, &ActionRunJob{
 			RunID:             run.ID,
 			RepoID:            run.RepoID,

models/actions/task.go

@@ -298,8 +298,9 @@ func CreateTaskForRunner(ctx context.Context, runner *ActionRunner) (*ActionTask
 	if len(workflowJob.Steps) > 0 {
 		steps := make([]*ActionTaskStep, len(workflowJob.Steps))
 		for i, v := range workflowJob.Steps {
+			name, _ := util.SplitStringAtByteN(v.String(), 255)
 			steps[i] = &ActionTaskStep{
-				Name:   v.String(),
+				Name:   name,
 				TaskID: task.ID,
 				Index:  int64(i),
 				RepoID: task.RepoID,

routers/api/actions/runner/runner.go

@@ -12,6 +12,7 @@ import (
 	"code.gitea.io/gitea/modules/actions"
 	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/util"
 	actions_service "code.gitea.io/gitea/services/actions"
 
 	runnerv1 "code.gitea.io/actions-proto-go/runner/v1"
@@ -55,9 +56,10 @@ func (s *Service) Register(
 	}
 
 	// create new runner
+	name, _ := util.SplitStringAtByteN(req.Msg.Name, 255)
 	runner := &actions_model.ActionRunner{
 		UUID:         gouuid.New().String(),
-		Name:         req.Msg.Name,
+		Name:         name,
 		OwnerID:      runnerToken.OwnerID,
 		RepoID:       runnerToken.RepoID,
 		AgentLabels:  req.Msg.AgentLabels,