Set buildpack version as header on dcl upload

cmd/supply/main.go

@@ -6,6 +6,7 @@ import (
 	"path/filepath"
 	"time"
 
+	"github.com/SAP/cloud-authorization-buildpack/pkg/common"
 	"github.com/SAP/cloud-authorization-buildpack/pkg/supply"
 	"github.com/SAP/cloud-authorization-buildpack/pkg/uploader"
 
@@ -26,6 +27,13 @@ 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)
+	}
+	common.SetVersion(version)
+
 	installer := libbuildpack.NewInstaller(manifest)
 
 	stager := libbuildpack.NewStager(os.Args[1:], logger, manifest)

pkg/common/version.go

@@ -0,0 +1,11 @@
+package common
+
+var versionNumber = "dev"
+
+func VersionNumber() string {
+	return versionNumber
+}
+
+func SetVersion(version string) {
+	versionNumber = version
+}

pkg/uploader/uploader.go

@@ -13,6 +13,7 @@ import (
 
 	"github.com/cloudfoundry/libbuildpack"
 
+	"github.com/SAP/cloud-authorization-buildpack/pkg/common"
 	"github.com/SAP/cloud-authorization-buildpack/pkg/supply/env"
 )
 
@@ -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", fmt.Sprintf("cloud-authorization-buildpack/%s", common.VersionNumber()))
 	r.Header.Set("Content-Type", "application/gzip")
 	return up.Client.Do(r)
 }