fix(master): seed the tag digest from running services and hide registry error text (#9)

internal/e2e/agent_master_test.go

@@ -11,6 +11,7 @@ import (
 	"net"
 	"net/http"
 	"net/http/httptest"
+	"regexp"
 	"sort"
 	"strings"
 	"sync"
@@ -31,6 +32,9 @@ import (
 	"github.com/shcizo/package-updater/internal/protocol"
 )
 
+// digestPattern is the digest format the real store records.
+var digestPattern = regexp.MustCompile(`^sha256:[0-9a-f]{64}$`)
+
 type memStore struct {
 	mu        sync.Mutex
 	agents    map[string]model.Agent
@@ -241,7 +245,7 @@ func (m *memStore) FinishJob(_ context.Context, agentID, jobID int64, f model.Jo
 	if f.Status == model.JobSucceeded {
 		svc := m.svcRows[j.ServiceID]
 		svc.DesiredRef = f.Ref
-		if _, d, _ := strings.Cut(f.Ref, "@"); !strings.Contains(requestedRef, "@") && d != "" {
+		if _, d, _ := strings.Cut(f.Ref, "@"); !strings.Contains(requestedRef, "@") && digestPattern.MatchString(d) {
 			svc.LastTagDigest = d
 		}
 		// Same rule as the SQL: the job was created for the suggested ref after it was reported.