Make --workspace configurable in obs stage/release

cmd/krel/cmd/obs_release.go

@@ -63,6 +63,14 @@ submit a Google Cloud Build (GCB) job which does:
 var obsReleaseOptions = obs.DefaultReleaseOptions()
 
 func init() {
+	obsReleaseCmd.PersistentFlags().
+		StringVar(
+			&obsReleaseOptions.Workspace,
+			"workspace",
+			obsReleaseOptions.Workspace,
+			"Workspace directory for running krel obs",
+		)
+
 	obsReleaseCmd.PersistentFlags().
 		StringVar(
 			&obsReleaseOptions.ReleaseType,

cmd/krel/cmd/obs_stage.go

@@ -77,6 +77,14 @@ const (
 )
 
 func init() {
+	obsStageCmd.PersistentFlags().
+		StringVar(
+			&obsStageOptions.Workspace,
+			"workspace",
+			obsStageOptions.Workspace,
+			"Workspace directory for running krel obs",
+		)
+
 	obsStageCmd.PersistentFlags().
 		StringVar(
 			&obsStageOptions.ReleaseType,

pkg/obs/obs.go

@@ -54,15 +54,15 @@ const (
 
 	// workspaceDir is the global directory where the stage and release process
 	// happens.
-	workspaceDir = "/workspace"
+	defaultWorkspaceDir = "/workspace"
 
 	// defaultSpecTemplatePath is path inside Google Cloud Build where package
 	// specs for kubeadm, kubectl, and kubelet are located.
-	defaultSpecTemplatePath = workspaceDir + "/go/src/k8s.io/release/" + consts.DefaultSpecTemplatePath
+	defaultSpecTemplatePath = defaultWorkspaceDir + "/go/src/k8s.io/release/" + consts.DefaultSpecTemplatePath
 
 	// obsRoot is path inside Google Cloud Build where OBS project and packages
 	// are checked out.
-	obsRoot = workspaceDir + "/src/obs"
+	obsRoot = "/src/obs"
 
 	// obsAPIURL is the URL of openSUSE's OpenBuildService instance.
 	obsAPIURL = "https://api.opensuse.org"
@@ -78,6 +78,9 @@ const (
 // Options are settings which will be used by `StageOptions` as well as
 // `ReleaseOptions`.
 type Options struct {
+	// Workspace is the root workspace.
+	Workspace string
+
 	// Run the whole process in non-mocked mode. Which means that it doesn't
 	// push specs and artifacts to OpenBuildService.
 	NoMock bool
@@ -150,6 +153,7 @@ func DefaultOptions() *Options {
 			consts.ArchitectureS390X,
 		},
 		SpecTemplatePath: defaultSpecTemplatePath,
+		Workspace:        defaultWorkspaceDir,
 	}
 }