cmdio: drop AskSelect, migrate caller to RunSelect (#5219)

## Summary

- `cmdio.AskSelect` was the only function in `libs/cmdio/compat.go` that
mixed template-specific concerns (multi-line label handling) with cmdio.
Its single caller in `libs/template/config.go` now calls
`cmdio.RunSelect` directly and handles the prefix lines locally,
shrinking `cmdio`'s public surface by one.
- Added `HideHelp` to `cmdio.SelectOptions` so the template prompt keeps
the hidden-help behavior that `AskSelect` previously hardcoded.

## Test plan

- [x] Manual: `databricks bundle init default-python` and confirm the
enum prompts render their multi-line description and selection list as
before.

Author: pietern

libs/cmdio/compat.go

@@ -5,8 +5,6 @@ import (
 	"fmt"
 	"io"
 	"strings"
-
-	"github.com/manifoldco/promptui"
 )
 
 /*
@@ -94,43 +92,3 @@ func AskYesOrNo(ctx context.Context, question string) (bool, error) {
 	ans = strings.ToLower(strings.TrimSpace(ans))
 	return ans == "y" || ans == "yes", nil
 }
-
-func splitAtLastNewLine(s string) (string, string) {
-	// Split at the newline character
-	if i := strings.LastIndex(s, "\n"); i != -1 {
-		return s[:i+1], s[i+1:]
-	}
-	// Return the original string if no newline found
-	return "", s
-}
-
-// AskSelect is a compatibility layer for the progress logger interfaces.
-// It prompts the user with a question and returns the answer.
-func AskSelect(ctx context.Context, question string, choices []string) (string, error) {
-	c := fromContext(ctx)
-
-	// Promptui does not support multiline prompts. So we split the question.
-	first, last := splitAtLastNewLine(question)
-	_, err := io.WriteString(c.err, first)
-	if err != nil {
-		return "", err
-	}
-
-	prompt := promptui.Select{
-		Label:    last,
-		Items:    choices,
-		HideHelp: true,
-		Templates: &promptui.SelectTemplates{
-			Label:    "{{.}}: ",
-			Selected: last + ": {{.}}",
-		},
-		Stdin:  c.promptStdin(),
-		Stdout: nopWriteCloser{c.err},
-	}
-
-	_, ans, err := prompt.Run()
-	if err != nil {
-		return "", err
-	}
-	return ans, nil
-}

libs/cmdio/compat_test.go

@@ -147,54 +147,6 @@ func (e *errorAfterNReader) Read(p []byte) (n int, err error) {
 	return 0, e.err
 }
 
-func TestCompat_splitAtLastNewLine(t *testing.T) {
-	tests := []struct {
-		name      string
-		input     string
-		wantFirst string
-		wantLast  string
-	}{
-		{
-			name:      "LF newline in middle",
-			input:     "hello\nworld",
-			wantFirst: "hello\n",
-			wantLast:  "world",
-		},
-		{
-			name:      "CRLF newline in middle",
-			input:     "hello\r\nworld",
-			wantFirst: "hello\r\n",
-			wantLast:  "world",
-		},
-		{
-			name:      "no newline",
-			input:     "hello world",
-			wantFirst: "",
-			wantLast:  "hello world",
-		},
-		{
-			name:      "newline at end",
-			input:     "hello\nworld\n",
-			wantFirst: "hello\nworld\n",
-			wantLast:  "",
-		},
-		{
-			name:      "newline at start",
-			input:     "\nhello world",
-			wantFirst: "\n",
-			wantLast:  "hello world",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			first, last := splitAtLastNewLine(tt.input)
-			assert.Equal(t, tt.wantFirst, first)
-			assert.Equal(t, tt.wantLast, last)
-		})
-	}
-}
-
 func TestCompat_AskYesOrNo(t *testing.T) {
 	tests := []struct {
 		name  string

libs/cmdio/select.go

@@ -23,6 +23,9 @@ type SelectOptions struct {
 	// StartInSearchMode opens the prompt with the search input focused.
 	StartInSearchMode bool
 
+	// HideHelp hides the navigation help line shown by promptui by default.
+	HideHelp bool
+
 	// LabelTemplate renders Label. Empty uses the default.
 	LabelTemplate string
 
@@ -44,6 +47,7 @@ func RunSelect(ctx context.Context, opts SelectOptions) (int, error) {
 		Items:             opts.Items,
 		Searcher:          opts.Searcher,
 		StartInSearchMode: opts.StartInSearchMode,
+		HideHelp:          opts.HideHelp,
 		Templates: &promptui.SelectTemplates{
 			Label:    opts.LabelTemplate,
 			Active:   opts.Active,

libs/template/config.go

@@ -7,6 +7,7 @@ import (
 	"io/fs"
 	"maps"
 	"slices"
+	"strings"
 
 	"github.com/databricks/cli/libs/cmdctx"
 	"github.com/databricks/cli/libs/cmdio"
@@ -213,10 +214,24 @@ func (c *config) promptOnce(property *jsonschema.Schema, name, defaultVal, descr
 		if err != nil {
 			return err
 		}
-		userInput, err = cmdio.AskSelect(c.ctx, description, options)
+		// promptui only supports a single-line label, so render any preceding
+		// lines of the description separately.
+		label := description
+		if i := strings.LastIndex(description, "\n"); i != -1 {
+			cmdio.LogString(c.ctx, description[:i])
+			label = description[i+1:]
+		}
+		idx, err := cmdio.RunSelect(c.ctx, cmdio.SelectOptions{
+			Label:         label,
+			Items:         options,
+			HideHelp:      true,
+			LabelTemplate: "{{.}}: ",
+			Selected:      label + ": {{.}}",
+		})
 		if err != nil {
 			return err
 		}
+		userInput = options[idx]
 	} else {
 		var err error
 		userInput, err = cmdio.Ask(c.ctx, description, defaultVal)