adds deprecation warnings to pack stack comands

internal/commands/stack.go

@@ -9,7 +9,8 @@ import (
 func NewStackCommand(logger logging.Logger) *cobra.Command {
 	command := cobra.Command{
 		Use:   "stack",
-		Short: "Interact with stacks",
+		Short: "(deprecated) Interact with stacks",
+		Long:  "(Deprecated)\nStacks are deprecated in favor of using BuildImages and RunImages directly, but will continue to be supported throughout all of 2023 and '24 if not longer. Please see our docs for more details- https://buildpacks.io/docs/concepts/components/stack",
 		RunE:  nil,
 	}
 

internal/commands/stack_suggest.go

@@ -19,6 +19,11 @@ type suggestedStack struct {
 }
 
 var suggestedStacks = []suggestedStack{
+	{
+		ID:          "Deprecation Notice",
+		Description: "Stacks are deprecated in favor of using BuildImages and RunImages directly, but will continue to be supported throughout all of 2023 and 2024 if not longer. Please see our docs for more details- https://buildpacks.io/docs/concepts/components/stack",
+		Maintainer:  "CNB",
+	},
 	{
 		ID:          "heroku-20",
 		Description: "The official Heroku stack based on Ubuntu 20.04",
@@ -53,7 +58,7 @@ func stackSuggest(logger logging.Logger) *cobra.Command {
 	cmd := &cobra.Command{
 		Use:     "suggest",
 		Args:    cobra.NoArgs,
-		Short:   "List the recommended stacks",
+		Short:   "(deprecated) List the recommended stacks",
 		Example: "pack stack suggest",
 		RunE: logError(logger, func(*cobra.Command, []string) error {
 			Suggest(logger)

internal/commands/stack_suggest_test.go

@@ -32,6 +32,12 @@ func testStacksSuggestCommand(t *testing.T, when spec.G, it spec.S) {
 			h.AssertNil(t, command.Execute())
 			h.AssertEq(t, outBuf.String(), `Stacks maintained by the community:
 
+    Stack ID: Deprecation Notice
+    Description: Stacks are deprecated in favor of using BuildImages and RunImages directly, but will continue to be supported throughout all of 2023 and 2024 if not longer. Please see our docs for more details- https://buildpacks.io/docs/concepts/components/stack
+    Maintainer: CNB
+    Build Image: 
+    Run Image: 
+
     Stack ID: heroku-20
     Description: The official Heroku stack based on Ubuntu 20.04
     Maintainer: Heroku

internal/commands/stack_test.go

@@ -0,0 +1,53 @@
+package commands
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/sclevine/spec"
+	"github.com/sclevine/spec/report"
+	"github.com/spf13/cobra"
+
+	"github.com/buildpacks/pack/pkg/logging"
+	h "github.com/buildpacks/pack/testhelpers"
+)
+
+func TestStackCommand(t *testing.T) {
+	spec.Run(t, "StackCommand", testStackCommand, spec.Parallel(), spec.Report(report.Terminal{}))
+}
+
+func testStackCommand(t *testing.T, when spec.G, it spec.S) {
+	var (
+		command *cobra.Command
+		outBuf  bytes.Buffer
+	)
+
+	it.Before(func() {
+		command = NewStackCommand(logging.NewLogWithWriters(&outBuf, &outBuf))
+	})
+
+	when("#Stack", func() {
+		it("displays stack information", func() {
+			command.SetArgs([]string{})
+			bb := bytes.NewBufferString("") // In most tests we don't seem to need to this, not sure why it's necessary here.
+			command.SetOut(bb)
+			h.AssertNil(t, command.Execute())
+			h.AssertEq(t, bb.String(), `(Deprecated)
+Stacks are deprecated in favor of using BuildImages and RunImages directly, but will continue to be supported throughout all of 2023 and '24 if not longer. Please see our docs for more details- https://buildpacks.io/docs/concepts/components/stack
+
+Usage:
+  stack [command]
+
+Available Commands:
+  completion  Generate the autocompletion script for the specified shell
+  help        Help about any command
+  suggest     (deprecated) List the recommended stacks
+
+Flags:
+  -h, --help   help for stack
+
+Use "stack [command] --help" for more information about a command.
+`)
+		})
+	})
+}