Improve online runner check (#35722)

This PR moves "no online runner" warning to the runs list. 

A job's `runs-on` may contain expressions like `runs-on: [self-hosted,
"${{ inputs.chosen-os }}"]` so the value of `runs-on` may be different
in each run. We cannot check it through the workflow file.

<details>
  <summary>Screenshots</summary>

Before:

<img width="960" alt="3d2a91746271d8b1f12c8f7d20eba550"
src="https://github.com/user-attachments/assets/7a972c50-db97-49d2-b12b-c1a439732a11"
/>

After:

<img width="960" alt="image"
src="https://github.com/user-attachments/assets/fc076e0e-bd08-4afe-99b9-c0eb0fd2c7e7"
/>
</details>

This PR also splits `prepareWorkflowDispatchTemplate` function into 2
functions:
- `prepareWorkflowTemplate` get and check all of the workflows
- `prepareWorkflowDispatchTemplate` only prepare workflow dispatch
config for `workflow_dispatch` workflows.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

models/actions/runner.go

@@ -14,6 +14,7 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/shared/types"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/container"
 	"code.gitea.io/gitea/modules/optional"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/timeutil"
@@ -173,6 +174,13 @@ func (r *ActionRunner) GenerateToken() (err error) {
 	return err
 }
 
+// CanMatchLabels checks whether the runner's labels can match a job's "runs-on"
+// See https://docs.github.com/en/actions/reference/workflows-and-actions/workflow-syntax#jobsjob_idruns-on
+func (r *ActionRunner) CanMatchLabels(jobRunsOn []string) bool {
+	runnerLabelSet := container.SetOf(r.AgentLabels...)
+	return runnerLabelSet.Contains(jobRunsOn...) // match all labels
+}
+
 func init() {
 	db.RegisterModel(&ActionRunner{})
 }

models/actions/task.go

@@ -13,7 +13,6 @@ import (
 	auth_model "code.gitea.io/gitea/models/auth"
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/unit"
-	"code.gitea.io/gitea/modules/container"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/timeutil"
@@ -245,7 +244,7 @@ func CreateTaskForRunner(ctx context.Context, runner *ActionRunner) (*ActionTask
 	var job *ActionRunJob
 	log.Trace("runner labels: %v", runner.AgentLabels)
 	for _, v := range jobs {
-		if isSubset(runner.AgentLabels, v.RunsOn) {
+		if runner.CanMatchLabels(v.RunsOn) {
 			job = v
 			break
 		}
@@ -475,20 +474,6 @@ func FindOldTasksToExpire(ctx context.Context, olderThan timeutil.TimeStamp, lim
 		Find(&tasks)
 }
 
-func isSubset(set, subset []string) bool {
-	m := make(container.Set[string], len(set))
-	for _, v := range set {
-		m.Add(v)
-	}
-
-	for _, v := range subset {
-		if !m.Contains(v) {
-			return false
-		}
-	}
-	return true
-}
-
 func convertTimestamp(timestamp *timestamppb.Timestamp) timeutil.TimeStamp {
 	if timestamp.GetSeconds() == 0 && timestamp.GetNanos() == 0 {
 		return timeutil.TimeStamp(0)

routers/web/repo/actions/actions.go

@@ -28,7 +28,7 @@ import (
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
 
-	"github.com/nektos/act/pkg/model"
+	act_model "github.com/nektos/act/pkg/model"
 	"gopkg.in/yaml.v3"
 )
 
@@ -38,9 +38,10 @@ const (
 	tplViewActions           templates.TplName = "repo/actions/view"
 )
 
-type Workflow struct {
-	Entry  git.TreeEntry
-	ErrMsg string
+type WorkflowInfo struct {
+	Entry    git.TreeEntry
+	ErrMsg   string
+	Workflow *act_model.Workflow
 }
 
 // MustEnableActions check if actions are enabled in settings
@@ -77,7 +78,11 @@ func List(ctx *context.Context) {
 		return
 	}
 
-	workflows := prepareWorkflowDispatchTemplate(ctx, commit)
+	workflows, curWorkflowID := prepareWorkflowTemplate(ctx, commit)
+	if ctx.Written() {
+		return
+	}
+	prepareWorkflowDispatchTemplate(ctx, workflows, curWorkflowID)
 	if ctx.Written() {
 		return
 	}
@@ -112,55 +117,41 @@ func WorkflowDispatchInputs(ctx *context.Context) {
 		ctx.ServerError("GetTagCommit/GetBranchCommit", err)
 		return
 	}
-	prepareWorkflowDispatchTemplate(ctx, commit)
+	workflows, curWorkflowID := prepareWorkflowTemplate(ctx, commit)
+	if ctx.Written() {
+		return
+	}
+	prepareWorkflowDispatchTemplate(ctx, workflows, curWorkflowID)
 	if ctx.Written() {
 		return
 	}
 	ctx.HTML(http.StatusOK, tplDispatchInputsActions)
 }
 
-func prepareWorkflowDispatchTemplate(ctx *context.Context, commit *git.Commit) (workflows []Workflow) {
-	workflowID := ctx.FormString("workflow")
-	ctx.Data["CurWorkflow"] = workflowID
-	ctx.Data["CurWorkflowExists"] = false
-
-	var curWorkflow *model.Workflow
+func prepareWorkflowTemplate(ctx *context.Context, commit *git.Commit) (workflows []WorkflowInfo, curWorkflowID string) {
+	curWorkflowID = ctx.FormString("workflow")
 
 	_, entries, err := actions.ListWorkflows(commit)
 	if err != nil {
 		ctx.ServerError("ListWorkflows", err)
-		return nil
+		return nil, ""
 	}
 
-	// Get all runner labels
-	runners, err := db.Find[actions_model.ActionRunner](ctx, actions_model.FindRunnerOptions{
-		RepoID:        ctx.Repo.Repository.ID,
-		IsOnline:      optional.Some(true),
-		WithAvailable: true,
-	})
-	if err != nil {
-		ctx.ServerError("FindRunners", err)
-		return nil
-	}
-	allRunnerLabels := make(container.Set[string])
-	for _, r := range runners {
-		allRunnerLabels.AddMultiple(r.AgentLabels...)
-	}
-
-	workflows = make([]Workflow, 0, len(entries))
+	workflows = make([]WorkflowInfo, 0, len(entries))
 	for _, entry := range entries {
-		workflow := Workflow{Entry: *entry}
+		workflow := WorkflowInfo{Entry: *entry}
 		content, err := actions.GetContentFromEntry(entry)
 		if err != nil {
 			ctx.ServerError("GetContentFromEntry", err)
-			return nil
+			return nil, ""
 		}
-		wf, err := model.ReadWorkflow(bytes.NewReader(content))
+		wf, err := act_model.ReadWorkflow(bytes.NewReader(content))
 		if err != nil {
 			workflow.ErrMsg = ctx.Locale.TrString("actions.runs.invalid_workflow_helper", err.Error())
 			workflows = append(workflows, workflow)
 			continue
 		}
+		workflow.Workflow = wf
 		// 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 you have matching runner and a job without "needs"
@@ -173,22 +164,6 @@ func prepareWorkflowDispatchTemplate(ctx *context.Context, commit *git.Commit) (
 			if !hasJobWithoutNeeds && len(j.Needs()) == 0 {
 				hasJobWithoutNeeds = true
 			}
-			runsOnList := j.RunsOn()
-			for _, ro := range runsOnList {
-				if strings.Contains(ro, "${{") {
-					// Skip if it contains expressions.
-					// The expressions could be very complex and could not be evaluated here,
-					// so just skip it, it's OK since it's just a tooltip message.
-					continue
-				}
-				if !allRunnerLabels.Contains(ro) {
-					workflow.ErrMsg = ctx.Locale.TrString("actions.runs.no_matching_online_runner_helper", ro)
-					break
-				}
-			}
-			if workflow.ErrMsg != "" {
-				break
-			}
 		}
 		if !hasJobWithoutNeeds {
 			workflow.ErrMsg = ctx.Locale.TrString("actions.runs.no_job_without_needs")
@@ -197,61 +172,75 @@ func prepareWorkflowDispatchTemplate(ctx *context.Context, commit *git.Commit) (
 			workflow.ErrMsg = ctx.Locale.TrString("actions.runs.no_job")
 		}
 		workflows = append(workflows, workflow)
-
-		if workflow.Entry.Name() == workflowID {
-			curWorkflow = wf
-			ctx.Data["CurWorkflowExists"] = true
-		}
 	}
 
 	ctx.Data["workflows"] = workflows
 	ctx.Data["RepoLink"] = ctx.Repo.Repository.Link()
-
+	ctx.Data["AllowDisableOrEnableWorkflow"] = ctx.Repo.IsAdmin()
 	actionsConfig := ctx.Repo.Repository.MustGetUnit(ctx, unit.TypeActions).ActionsConfig()
 	ctx.Data["ActionsConfig"] = actionsConfig
+	ctx.Data["CurWorkflow"] = curWorkflowID
+	ctx.Data["CurWorkflowDisabled"] = actionsConfig.IsWorkflowDisabled(curWorkflowID)
 
-	if len(workflowID) > 0 && ctx.Repo.CanWrite(unit.TypeActions) {
-		ctx.Data["AllowDisableOrEnableWorkflow"] = ctx.Repo.IsAdmin()
-		isWorkflowDisabled := actionsConfig.IsWorkflowDisabled(workflowID)
-		ctx.Data["CurWorkflowDisabled"] = isWorkflowDisabled
-
-		if !isWorkflowDisabled && curWorkflow != nil {
-			workflowDispatchConfig := workflowDispatchConfig(curWorkflow)
-			if workflowDispatchConfig != nil {
-				ctx.Data["WorkflowDispatchConfig"] = workflowDispatchConfig
-
-				branchOpts := git_model.FindBranchOptions{
-					RepoID:          ctx.Repo.Repository.ID,
-					IsDeletedBranch: optional.Some(false),
-					ListOptions: db.ListOptions{
-						ListAll: true,
-					},
-				}
-				branches, err := git_model.FindBranchNames(ctx, branchOpts)
-				if err != nil {
-					ctx.ServerError("FindBranchNames", err)
-					return nil
-				}
-				// always put default branch on the top if it exists
-				if slices.Contains(branches, ctx.Repo.Repository.DefaultBranch) {
-					branches = util.SliceRemoveAll(branches, ctx.Repo.Repository.DefaultBranch)
-					branches = append([]string{ctx.Repo.Repository.DefaultBranch}, branches...)
-				}
-				ctx.Data["Branches"] = branches
-
-				tags, err := repo_model.GetTagNamesByRepoID(ctx, ctx.Repo.Repository.ID)
-				if err != nil {
-					ctx.ServerError("GetTagNamesByRepoID", err)
-					return nil
-				}
-				ctx.Data["Tags"] = tags
-			}
-		}
-	}
-	return workflows
+	return workflows, curWorkflowID
 }
 
-func prepareWorkflowList(ctx *context.Context, workflows []Workflow) {
+func prepareWorkflowDispatchTemplate(ctx *context.Context, workflowInfos []WorkflowInfo, curWorkflowID string) {
+	actionsConfig := ctx.Repo.Repository.MustGetUnit(ctx, unit.TypeActions).ActionsConfig()
+	if curWorkflowID == "" || !ctx.Repo.CanWrite(unit.TypeActions) || actionsConfig.IsWorkflowDisabled(curWorkflowID) {
+		return
+	}
+
+	var curWorkflow *act_model.Workflow
+	for _, workflowInfo := range workflowInfos {
+		if workflowInfo.Entry.Name() == curWorkflowID {
+			if workflowInfo.Workflow == nil {
+				log.Debug("CurWorkflowID %s is found but its workflowInfo.Workflow is nil", curWorkflowID)
+				return
+			}
+			curWorkflow = workflowInfo.Workflow
+			break
+		}
+	}
+
+	if curWorkflow == nil {
+		return
+	}
+
+	ctx.Data["CurWorkflowExists"] = true
+	curWfDispatchCfg := workflowDispatchConfig(curWorkflow)
+	if curWfDispatchCfg == nil {
+		return
+	}
+
+	ctx.Data["WorkflowDispatchConfig"] = curWfDispatchCfg
+
+	branchOpts := git_model.FindBranchOptions{
+		RepoID:          ctx.Repo.Repository.ID,
+		IsDeletedBranch: optional.Some(false),
+		ListOptions: db.ListOptions{
+			ListAll: true,
+		},
+	}
+	branches, err := git_model.FindBranchNames(ctx, branchOpts)
+	if err != nil {
+		ctx.ServerError("FindBranchNames", err)
+		return
+	}
+	// always put default branch on the top
+	branches = util.SliceRemoveAll(branches, ctx.Repo.Repository.DefaultBranch)
+	branches = append([]string{ctx.Repo.Repository.DefaultBranch}, branches...)
+	ctx.Data["Branches"] = branches
+
+	tags, err := repo_model.GetTagNamesByRepoID(ctx, ctx.Repo.Repository.ID)
+	if err != nil {
+		ctx.ServerError("GetTagNamesByRepoID", err)
+		return
+	}
+	ctx.Data["Tags"] = tags
+}
+
+func prepareWorkflowList(ctx *context.Context, workflows []WorkflowInfo) {
 	actorID := ctx.FormInt64("actor")
 	status := ctx.FormInt("status")
 	workflowID := ctx.FormString("workflow")
@@ -302,6 +291,45 @@ func prepareWorkflowList(ctx *context.Context, workflows []Workflow) {
 		log.Error("LoadIsRefDeleted", err)
 	}
 
+	// Check for each run if there is at least one online runner that can run its jobs
+	runErrors := make(map[int64]string)
+	runners, err := db.Find[actions_model.ActionRunner](ctx, actions_model.FindRunnerOptions{
+		RepoID:        ctx.Repo.Repository.ID,
+		IsOnline:      optional.Some(true),
+		WithAvailable: true,
+	})
+	if err != nil {
+		ctx.ServerError("FindRunners", err)
+		return
+	}
+	for _, run := range runs {
+		if !run.Status.In(actions_model.StatusWaiting, actions_model.StatusRunning) {
+			continue
+		}
+		jobs, err := actions_model.GetRunJobsByRunID(ctx, run.ID)
+		if err != nil {
+			ctx.ServerError("GetRunJobsByRunID", err)
+			return
+		}
+		for _, job := range jobs {
+			if !job.Status.IsWaiting() {
+				continue
+			}
+			hasOnlineRunner := false
+			for _, runner := range runners {
+				if runner.CanMatchLabels(job.RunsOn) {
+					hasOnlineRunner = true
+					break
+				}
+			}
+			if !hasOnlineRunner {
+				runErrors[run.ID] = ctx.Locale.TrString("actions.runs.no_matching_online_runner_helper", strings.Join(job.RunsOn, ","))
+				break
+			}
+		}
+	}
+	ctx.Data["RunErrors"] = runErrors
+
 	ctx.Data["Runs"] = runs
 
 	actors, err := actions_model.GetActors(ctx, ctx.Repo.Repository.ID)
@@ -362,7 +390,7 @@ type WorkflowDispatch struct {
 	Inputs []WorkflowDispatchInput
 }
 
-func workflowDispatchConfig(w *model.Workflow) *WorkflowDispatch {
+func workflowDispatchConfig(w *act_model.Workflow) *WorkflowDispatch {
 	switch w.RawOn.Kind {
 	case yaml.ScalarNode:
 		var val string

templates/repo/actions/list.tmpl

@@ -7,14 +7,14 @@
 		{{if .HasWorkflowsOrRuns}}
 		<div class="ui stackable grid">
 			<div class="four wide column">
-				<div class="ui fluid vertical menu">
-					<a class="item{{if not $.CurWorkflow}} active{{end}}" href="?actor={{$.CurActor}}&status={{$.CurStatus}}">{{ctx.Locale.Tr "actions.runs.all_workflows"}}</a>
+				<div class="ui fluid vertical menu flex-items-block">
+					<a class="item {{if not $.CurWorkflow}}active{{end}}" href="?actor={{$.CurActor}}&status={{$.CurStatus}}">{{ctx.Locale.Tr "actions.runs.all_workflows"}}</a>
 					{{range .workflows}}
-						<a class="item{{if eq .Entry.Name $.CurWorkflow}} active{{end}}" href="?workflow={{.Entry.Name}}&actor={{$.CurActor}}&status={{$.CurStatus}}">{{.Entry.Name}}
+						<a class="item {{if eq .Entry.Name $.CurWorkflow}}active{{end}}" href="?workflow={{.Entry.Name}}&actor={{$.CurActor}}&status={{$.CurStatus}}">
+							<span class="gt-ellipsis">{{.Entry.Name}}</span>
+
 							{{if .ErrMsg}}
-								<span data-tooltip-content="{{.ErrMsg}}">
-									{{svg "octicon-alert" 16 "text red"}}
-								</span>
+								<span class="flex-text-inline" data-tooltip-content="{{.ErrMsg}}">{{svg "octicon-alert" 16 "text red"}}</span>
 							{{end}}
 
 							{{if $.ActionsConfig.IsWorkflowDisabled .Entry.Name}}

templates/repo/actions/runs_list.tmpl

@@ -16,6 +16,7 @@
 				</a>
 				<div class="flex-item-body">
 					<span><b>{{if not $.CurWorkflow}}{{$run.WorkflowID}} {{end}}#{{$run.Index}}</b>:</span>
+
 					{{- if $run.ScheduleID -}}
 						{{ctx.Locale.Tr "actions.runs.scheduled"}}
 					{{- else -}}
@@ -24,6 +25,13 @@
 						{{ctx.Locale.Tr "actions.runs.pushed_by"}}
 						<a href="{{$run.TriggerUser.HomeLink}}">{{$run.TriggerUser.GetDisplayName}}</a>
 					{{- end -}}
+
+					{{$errMsg := index $.RunErrors $run.ID}}
+					{{if $errMsg}}
+						<span class="flex-text-inline" data-tooltip-content="{{$errMsg}}">
+							{{svg "octicon-alert" 16 "text red"}}
+						</span>
+					{{end}}
 				</div>
 			</div>
 			<div class="flex-item-trailing">

web_src/css/base.css

@@ -1104,6 +1104,7 @@ table th[data-sortt-desc] .svg {
 }
 
 .ui.list.flex-items-block > .item,
+.ui.vertical.menu.flex-items-block > .item,
 .ui.form .field > label.flex-text-block, /* override fomantic "block" style */
 .flex-items-block > .item,
 .flex-text-block {