Add user agent suffix feature flag (#3297)

* Add user agent suffix feature flag

* unecessary concat

pkg/common/http.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"github.com/hashicorp/go-retryablehttp"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/feature"
 )
 
 var caCerts = []string{
@@ -88,8 +89,15 @@ type CustomTransport struct {
 	T http.RoundTripper
 }
 
+func userAgent() string {
+	if len(feature.UserAgentSuffix.Load()) > 0 {
+		return "TruffleHog " + feature.UserAgentSuffix.Load()
+	}
+	return "TruffleHog"
+}
+
 func (t *CustomTransport) RoundTrip(req *http.Request) (*http.Response, error) {
-	req.Header.Add("User-Agent", "TruffleHog")
+	req.Header.Add("User-Agent", userAgent())
 	return t.T.RoundTrip(req)
 }
 

pkg/detectors/http.go

@@ -6,22 +6,30 @@ import (
 	"net"
 	"net/http"
 	"time"
+
+	"github.com/trufflesecurity/trufflehog/v3/pkg/feature"
 )
 
 var DetectorHttpClientWithNoLocalAddresses *http.Client
 var DetectorHttpClientWithLocalAddresses *http.Client
 
 const DefaultResponseTimeout = 5 * time.Second
-const DefaultUserAgent = "TruffleHog"
+
+func userAgent() string {
+	if len(feature.UserAgentSuffix.Load()) > 0 {
+		return "TruffleHog " + feature.UserAgentSuffix.Load()
+	}
+	return "TruffleHog"
+}
 
 func init() {
 	DetectorHttpClientWithLocalAddresses = NewDetectorHttpClient(
-		WithTransport(NewDetectorTransport(DefaultUserAgent, nil)),
+		WithTransport(NewDetectorTransport(nil)),
 		WithTimeout(DefaultResponseTimeout),
 		WithNoFollowRedirects(),
 	)
 	DetectorHttpClientWithNoLocalAddresses = NewDetectorHttpClient(
-		WithTransport(NewDetectorTransport(DefaultUserAgent, nil)),
+		WithTransport(NewDetectorTransport(nil)),
 		WithTimeout(DefaultResponseTimeout),
 		WithNoFollowRedirects(),
 		WithNoLocalIP(),
@@ -41,12 +49,11 @@ func WithNoFollowRedirects() ClientOption {
 }
 
 type detectorTransport struct {
-	T         http.RoundTripper
+	T http.RoundTripper
-	userAgent string
 }
 
 func (t *detectorTransport) RoundTrip(req *http.Request) (*http.Response, error) {
-	req.Header.Add("User-Agent", t.userAgent)
+	req.Header.Add("User-Agent", userAgent())
 	return t.T.RoundTrip(req)
 }
 
@@ -55,7 +62,7 @@ var defaultDialer = &net.Dialer{
 	KeepAlive: 5 * time.Second,
 }
 
-func NewDetectorTransport(userAgent string, T http.RoundTripper) http.RoundTripper {
+func NewDetectorTransport(T http.RoundTripper) http.RoundTripper {
 	if T == nil {
 		T = &http.Transport{
 			Proxy:                 http.ProxyFromEnvironment,
@@ -67,7 +74,7 @@ func NewDetectorTransport(userAgent string, T http.RoundTripper) http.RoundTripp
 			ExpectContinueTimeout: 1 * time.Second,
 		}
 	}
-	return &detectorTransport{T: T, userAgent: userAgent}
+	return &detectorTransport{T: T}
 }
 
 func isLocalIP(ip net.IP) bool {
@@ -143,7 +150,7 @@ func WithTimeout(timeout time.Duration) ClientOption {
 
 func NewDetectorHttpClient(opts ...ClientOption) *http.Client {
 	httpClient := &http.Client{
-		Transport: NewDetectorTransport(DefaultUserAgent, nil),
+		Transport: NewDetectorTransport(nil),
 		Timeout:   DefaultResponseTimeout,
 	}
 

pkg/feature/feature.go

@@ -3,7 +3,32 @@ package feature
 import "sync/atomic"
 
 var (
-	ForceSkipBinaries  = atomic.Bool{}
+	ForceSkipBinaries  atomic.Bool
-	ForceSkipArchives  = atomic.Bool{}
+	ForceSkipArchives  atomic.Bool
-	SkipAdditionalRefs = atomic.Bool{}
+	SkipAdditionalRefs atomic.Bool
+	UserAgentSuffix    AtomicString
 )
+
+type AtomicString struct {
+	value atomic.Value
+}
+
+// Load returns the current value of the atomic string
+func (as *AtomicString) Load() string {
+	if v := as.value.Load(); v != nil {
+		return v.(string)
+	}
+	return ""
+}
+
+// Store sets the value of the atomic string
+func (as *AtomicString) Store(newValue string) {
+	as.value.Store(newValue)
+}
+
+// Swap atomically swaps the current string with a new one and returns the old value
+func (as *AtomicString) Swap(newValue string) string {
+	oldValue := as.Load()
+	as.Store(newValue)
+	return oldValue
+}

pkg/sources/github/github_integration_test.go

@@ -63,7 +63,7 @@ func TestSource_Token(t *testing.T) {
 	s.Init(ctx, "github integration test source", 0, 0, false, conn, 1)
 	s.filteredRepoCache = s.newFilteredRepoCache(ctx, memory.New[string](), nil, nil)
 
-	err = s.enumerateWithApp(ctx, s.connector.(*appConnector).InstallationClient())
+	err = s.enumerateWithApp(ctx, s.connector.(*appConnector).InstallationClient(), noopReporter())
 	assert.NoError(t, err)
 
 	_, _, err = s.cloneRepo(ctx, "https://github.com/truffle-test-integration-org/another-test-repo.git")
@@ -631,7 +631,7 @@ func TestSource_paginateGists(t *testing.T) {
 			}
 			chunksCh := make(chan *sources.Chunk, 5)
 			go func() {
-				assert.NoError(t, s.addUserGistsToCache(ctx, tt.user))
+				assert.NoError(t, s.addUserGistsToCache(ctx, tt.user, noopReporter()))
 				chunksCh <- &sources.Chunk{}
 			}()
 			var wantedRepo string