add metrics for gitlab (trufflesecurity#2190)

pkg/sources/gitlab/gitlab.go

@@ -148,6 +148,8 @@ func (s *Source) Chunks(ctx context.Context, chunksChan chan *sources.Chunk, _ .
 	if err != nil {
 		return errors.New(err)
 	}
+
+	gitlabReposScanned.WithLabelValues(s.name).Set(0)
 	// Get repo within target.
 	repos, errs := normalizeRepos(s.repos)
 	for _, repoErr := range errs {
@@ -409,6 +411,8 @@ func (s *Source) getReposFromGitlab(ctx context.Context, apiClient *gitlab.Clien
 	if len(repos) == 0 {
 		return nil, errors.Errorf("unable to discover any repos"), true
 	}
+
+	gitlabReposEnumerated.WithLabelValues(s.name).Set(float64(len(repos)))
 	return repos, nil, false
 }
 
@@ -467,6 +471,7 @@ func (s *Source) scanRepos(ctx context.Context, chunksChan chan *sources.Chunk)
 				scanErrs.Add(err)
 				return nil
 			}
+			gitlabReposScanned.WithLabelValues(s.name).Inc()
 
 			logger.V(2).Info(fmt.Sprintf("Completed scanning repo %d/%d", i+1, len(s.repos)))
 			return nil

pkg/sources/gitlab/metrics.go

@@ -0,0 +1,26 @@
+package gitlab
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+
+	"github.com/trufflesecurity/trufflehog/v3/pkg/common"
+)
+
+var (
+	gitlabReposEnumerated = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: common.MetricsNamespace,
+		Subsystem: common.MetricsSubsystem,
+		Name:      "gitlab_repos_enumerated",
+		Help:      "Total number of Gitlab repositories enumerated.",
+	},
+		[]string{"source_name"})
+
+	gitlabReposScanned = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: common.MetricsNamespace,
+		Subsystem: common.MetricsSubsystem,
+		Name:      "gitlab_repos_scanned",
+		Help:      "Total number of Gitlab repositories scanned.",
+	},
+		[]string{"source_name"})
+)