Modify user agent format with subsystem and is proxy configured information (#3116)

github/actions/client.go

@@ -109,23 +109,31 @@ type ProxyFunc func(req *http.Request) (*url.URL, error)
 type ClientOption func(*Client)
 
 type UserAgentInfo struct {
-	Version    string
-	CommitSHA  string
+	// Version is the version of the controller
+	Version string
+	// CommitSHA is the git commit SHA of the controller
+	CommitSHA string
+	// ScaleSetID is the ID of the scale set
 	ScaleSetID int
+	// HasProxy is true if the controller is running behind a proxy
+	HasProxy bool
+	// Subsystem is the subsystem such as listener, controller, etc.
+	// Each system may pick its own subsystem name.
+	Subsystem string
 }
 
 func (u UserAgentInfo) String() string {
-	var scaleSetID = "NA"
+	scaleSetID := "NA"
 	if u.ScaleSetID > 0 {
 		scaleSetID = strconv.Itoa(u.ScaleSetID)
 	}
 
-	return fmt.Sprintf(
-		"actions-runner-controller/%s CommitSHA/%s ScaleSetID/%s",
-		u.Version,
-		u.CommitSHA,
-		scaleSetID,
-	)
+	proxy := "Proxy/disabled"
+	if u.HasProxy {
+		proxy = "Proxy/enabled"
+	}
+
+	return fmt.Sprintf("actions-runner-controller/%s (%s; %s) ScaleSetID/%s (%s)", u.Version, u.CommitSHA, u.Subsystem, scaleSetID, proxy)
 }
 
 func WithLogger(logger logr.Logger) ClientOption {

github/actions/user_agent_test.go

@@ -0,0 +1,24 @@
+package actions_test
+
+import (
+	"testing"
+
+	"github.com/actions/actions-runner-controller/github/actions"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUserAgentInfoString(t *testing.T) {
+	userAgentInfo := actions.UserAgentInfo{
+		Version:    "0.1.0",
+		CommitSHA:  "1234567890abcdef",
+		ScaleSetID: 10,
+		HasProxy:   true,
+		Subsystem:  "test",
+	}
+
+	userAgent := userAgentInfo.String()
+	expectedProduct := "actions-runner-controller/0.1.0 (1234567890abcdef; test)"
+	assert.Contains(t, userAgent, expectedProduct)
+	expectedScaleSet := "ScaleSetID/10 (Proxy/enabled)"
+	assert.Contains(t, userAgent, expectedScaleSet)
+}