feat: implement job-isolated cache directories

- Each job now gets its own cache directory: ~/.cache/act/jobs/{taskId}/
- Cache is cleaned up automatically after job completion
- Periodic cleanup removes stale job caches older than 2 hours
- Eliminates race conditions in npm/pnpm cache operations
- No more ENOTEMPTY errors from concurrent tool installs
- Fix workflow: use linux-latest and setup-go@v4

.gitea/workflows/release-tag.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: linux-latest
     strategy:
       matrix:
         include:
@@ -26,7 +26,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v4
         with:
           go-version-file: 'go.mod'
           cache: false
@@ -52,7 +52,7 @@ jobs:
 
   release:
     needs: build
-    runs-on: ubuntu-latest
+    runs-on: linux-latest
     steps:
       - uses: actions/checkout@v4
 

internal/app/cmd/daemon.go

@@ -187,6 +187,19 @@ func runDaemon(ctx context.Context, daemArgs *daemonArgs, configFile *string) fu
 
 		// Start periodic capabilities update goroutine
 		go periodicCapabilitiesUpdate(ctx, runner, ls.Names(), dockerHost, cfg.Container.WorkdirParent)
+		// Start periodic stale job cache cleanup (every hour, remove caches older than 2 hours)
+		go func() {
+			ticker := time.NewTicker(1 * time.Hour)
+			defer ticker.Stop()
+			for {
+				select {
+				case <-ctx.Done():
+					return
+				case <-ticker.C:
+					runner.CleanStaleJobCaches(2 * time.Hour)
+				}
+			}
+		}()
 
 		poller := poll.New(cfg, cli, runner)
 		poller.SetBandwidthManager(bandwidthManager)

internal/app/run/runner.go

@@ -7,6 +7,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"os"
 	"path/filepath"
 	"strings"
 	"sync"
@@ -41,6 +42,49 @@ type Runner struct {
 	runningTasks sync.Map
 }
 
+
+// getJobCacheDir returns a job-isolated cache directory
+func (r *Runner) getJobCacheDir(taskID int64) string {
+	return filepath.Join(r.cfg.Host.WorkdirParent, "jobs", fmt.Sprintf("%d", taskID))
+}
+
+// cleanupJobCache removes the job-specific cache directory after completion
+func (r *Runner) cleanupJobCache(taskID int64) {
+	jobCacheDir := r.getJobCacheDir(taskID)
+	if err := os.RemoveAll(jobCacheDir); err != nil {
+		log.Warnf("failed to cleanup job cache %s: %v", jobCacheDir, err)
+	} else {
+		log.Infof("cleaned up job cache: %s", jobCacheDir)
+	}
+}
+
+// CleanStaleJobCaches removes job cache directories older than maxAge
+func (r *Runner) CleanStaleJobCaches(maxAge time.Duration) {
+	jobsDir := filepath.Join(r.cfg.Host.WorkdirParent, "jobs")
+	entries, err := os.ReadDir(jobsDir)
+	if err != nil {
+		return // directory may not exist yet
+	}
+	
+	cutoff := time.Now().Add(-maxAge)
+	for _, entry := range entries {
+		if !entry.IsDir() {
+			continue
+		}
+		info, err := entry.Info()
+		if err != nil {
+			continue
+		}
+		if info.ModTime().Before(cutoff) {
+			jobPath := filepath.Join(jobsDir, entry.Name())
+			if err := os.RemoveAll(jobPath); err != nil {
+				log.Warnf("failed to remove stale job cache %s: %v", jobPath, err)
+			} else {
+				log.Infof("evicted stale job cache: %s", jobPath)
+			}
+		}
+	}
+}
 func NewRunner(cfg *config.Config, reg *config.Registration, cli client.Client) *Runner {
 	ls := labels.Labels{}
 	for _, v := range reg.Labels {
@@ -95,6 +139,7 @@ func (r *Runner) Run(ctx context.Context, task *runnerv1.Task) error {
 	}
 	r.runningTasks.Store(task.Id, struct{}{})
 	defer r.runningTasks.Delete(task.Id)
+	defer r.cleanupJobCache(task.Id)
 
 	ctx, cancel := context.WithTimeout(ctx, r.cfg.Runner.Timeout)
 	defer cancel()
@@ -202,7 +247,7 @@ func (r *Runner) run(ctx context.Context, task *runnerv1.Task, reporter *report.
 		// On Windows, Workdir will be like "\<parent_directory>\<owner>\<repo>"
 		Workdir:        filepath.FromSlash(fmt.Sprintf("/%s/%s", strings.TrimLeft(r.cfg.Container.WorkdirParent, "/"), preset.Repository)),
 		BindWorkdir:    false,
-		ActionCacheDir: filepath.FromSlash(r.cfg.Host.WorkdirParent),
+		ActionCacheDir: filepath.FromSlash(r.getJobCacheDir(task.Id)),
 
 		ReuseContainers:       false,
 		ForcePull:             r.cfg.Container.ForcePull,