Set buildpack version as header on dcl upload (#93)

* Set buildpack version as header on dcl upload

* Add userAgent field to uploader

* Remove param

* add unit test for setting the User-Agent Header in Base DCL upload

---------

Co-authored-by: d047491 <sascha.zilli@sap.com>

Author: f-blass

cmd/supply/main.go

@@ -26,6 +26,12 @@ func main() {
 		logger.Error("Unable to load buildpack manifest: %s", err)
 		os.Exit(10)
 	}
+	version, err := manifest.Version()
+	if err != nil {
+		logger.Error("Unable to load buildpack version: %s", err)
+		os.Exit(20)
+	}
+
 	installer := libbuildpack.NewInstaller(manifest)
 
 	stager := libbuildpack.NewStager(os.Args[1:], logger, manifest)
@@ -74,6 +80,7 @@ func main() {
 		BuildpackDir:        buildpackDir,
 		GetClient:           uploader.GetClient,
 		CertCopierSourceDir: path.Join(buildpackDir, "bin"),
+		BuildpackVersion:    version,
 	}
 
 	err = s.Run()

pkg/supply/supply.go

@@ -45,6 +45,7 @@ type Supplier struct {
 	BuildpackDir        string
 	GetClient           func(cert, key []byte) (uploader.AMSClient, error)
 	CertCopierSourceDir string
+	BuildpackVersion    string
 }
 
 type Cloudfoundry struct {
@@ -284,6 +285,7 @@ func (s *Supplier) upload(creds *services.IASCredentials, tlsCfg tlsConfig, root
 		Root:          path.Join(s.Stager.BuildDir(), rootDir),
 		Client:        client,
 		AMSInstanceID: creds.AmsInstanceID,
+		UserAgent:     fmt.Sprintf("cloud-authorization-buildpack/%s", s.BuildpackVersion),
 	}
 	return u.Do(context.Background(), creds.AmsServerURL)
 }

pkg/supply/supply_test.go

@@ -97,6 +97,7 @@ var _ = Describe("Supply", func() {
 			Log:                 logger,
 			BuildpackDir:        buildpackDir,
 			CertCopierSourceDir: certCopierDir,
+			BuildpackVersion:    "UNIT-TEST",
 			GetClient: func(cert, key []byte) (uploader.AMSClient, error) {
 				certSpy = cert
 				keySpy = key
@@ -169,6 +170,11 @@ var _ = Describe("Supply", func() {
 				expectedValue := []string{"00000000-3b4d-4c41-9e5b-9aee7bfa6348"}
 				Expect(uploadReqSpy.Header).Should(HaveKeyWithValue(env.HeaderInstanceID, expectedValue))
 			})
+			It("sets the buildpack version as User-Agent Header", func() {
+				Expect(supplier.Run()).To(Succeed())
+				expectedValue := []string{"cloud-authorization-buildpack/UNIT-TEST"}
+				Expect(uploadReqSpy.Header).Should(HaveKeyWithValue("User-Agent", expectedValue))
+			})
 			It("creates a valid launch.yml", func() {
 				Expect(supplier.Run()).To(Succeed())
 				launchConfig, err := os.Open(filepath.Join(depDir, "launch.yml"))

pkg/uploader/uploader.go

@@ -21,6 +21,7 @@ type Uploader struct {
 	Root          string
 	Client        AMSClient
 	AMSInstanceID string
+	UserAgent     string
 }
 
 //go:generate mockgen --build_flags=--mod=mod --destination=../supply/client_mock_test.go --package=supply_test github.com/SAP/cloud-authorization-buildpack/pkg/uploader AMSClient
@@ -91,6 +92,7 @@ func (up *Uploader) do(ctx context.Context, dstURL string, body []byte) (*http.R
 		return nil, fmt.Errorf("could not create DCL upload request %w", err)
 	}
 	r.Header.Set(env.HeaderInstanceID, up.AMSInstanceID)
+	r.Header.Set("User-Agent", up.UserAgent)
 	r.Header.Set("Content-Type", "application/gzip")
 	return up.Client.Do(r)
 }