Merge #11387

11387: `pulumi about` outputs the fully qualified stack reference r=iwahbe a=AaronFriel

Resolves #11386

```shell
$ pulumi about 
# current output would go here until after this line:
Current Stack: dev

Fully qualified stack name: Fully qualified stack name: friel/tmp.knCczy5IiO/dev

Found no resources associated with dev

Found no pending operations associated with dev
# and regular output
```

```shell
$ pulumi about --json | jq '.currentStack.fullyQualifiedName'
"friel/tmp.knCczy5IiO/dev"
```

When there is no valid stack, the `currentStack` value is `null`. 

Due to an existing bug, when the backend is filestate the `currentStack` value is `null`. It appears on filestate backends we do not render the current stack.

Co-authored-by: Aaron Friel <mayreply@aaronfriel.com>
Co-authored-by: Ian Wahbe <ian@wahbe.com>

changelog/pending/20221118--cli-about--add-fully-qualified-stack-name-to-current-stack.yaml

@@ -0,0 +1,4 @@
+changes:
+- type: feat
+  scope: cli/about
+  description: Add fully qualified stack name to current stack.

pkg/backend/backend.go

@@ -75,6 +75,9 @@ type StackReference interface {
 	// name may not uniquely identify the stack (e.g. the cloud backend embeds owner information in the StackReference
 	// but that information is not part of the StackName() we pass to the engine.
 	Name() tokens.Name
+
+	// Fully qualified name of the stack.
+	FullyQualifiedName() tokens.QName
 }
 
 // PolicyPackReference is an opaque type that refers to a PolicyPack managed by a backend. The CLI

pkg/backend/filestate/backend.go

@@ -99,6 +99,10 @@ func (r localBackendReference) Name() tokens.Name {
 	return r.name
 }
 
+func (r localBackendReference) FullyQualifiedName() tokens.QName {
+	return r.Name().Q()
+}
+
 func IsFileStateBackendURL(urlstr string) bool {
 	u, err := url.Parse(urlstr)
 	if err != nil {

pkg/backend/httpstate/stack.go

@@ -74,6 +74,10 @@ func (c cloudBackendReference) Name() tokens.Name {
 	return c.name
 }
 
+func (c cloudBackendReference) FullyQualifiedName() tokens.QName {
+	return tokens.IntoQName(fmt.Sprintf("%v/%v/%v", c.owner, c.project, c.name.String()))
+}
+
 // cloudStack is a cloud stack descriptor.
 type cloudStack struct {
 	// ref is the stack's unique name.

pkg/cmd/pulumi/about.go

@@ -330,9 +330,10 @@ func (b backendAbout) String() string {
 }
 
 type currentStackAbout struct {
-	Name       string       `json:"name"`
-	Resources  []aboutState `json:"resources"`
-	PendingOps []aboutState `json:"pendingOps"`
+	Name               string       `json:"name"`
+	FullyQualifiedName string       `json:"fullyQualifiedName"`
+	Resources          []aboutState `json:"resources"`
+	PendingOps         []aboutState `json:"pendingOps"`
 }
 
 type aboutState struct {
@@ -386,9 +387,10 @@ func getCurrentStackAbout(ctx context.Context, b backend.Backend, selectedStack
 		}
 	}
 	return currentStackAbout{
-		Name:       name,
-		Resources:  aboutResources,
-		PendingOps: aboutPending,
+		Name:               name,
+		FullyQualifiedName: stack.Ref().FullyQualifiedName().String(),
+		Resources:          aboutResources,
+		PendingOps:         aboutPending,
 	}, nil
 }
 
@@ -423,7 +425,11 @@ func (current currentStackAbout) String() string {
 			Rows:    rows,
 		}.String() + "\n"
 	}
-	return fmt.Sprintf("Current Stack: %s\n\n%s\n%s", current.Name, resources, pending)
+	stackName := current.Name
+	if current.FullyQualifiedName != "" {
+		stackName = current.FullyQualifiedName
+	}
+	return fmt.Sprintf("Current Stack: %s\n\n%s\n%s", stackName, resources, pending)
 }
 
 func simpleTableRows(arr [][]string) []cmdutil.TableRow {

pkg/cmd/pulumi/stack_ls_test.go

@@ -82,6 +82,10 @@ func (msr *mockStackReference) Name() tokens.Name {
 	return tokens.Name(msr.name)
 }
 
+func (msr *mockStackReference) FullyQualifiedName() tokens.QName {
+	return msr.Name().Q()
+}
+
 func (msr *mockStackReference) String() string {
 	return msr.name
 }