fix(cli): treat eof as empty multi-select

Co-Authored-By: Virgil <virgil@lethean.io>

pkg/cli/prompt.go

@@ -84,6 +84,9 @@ func MultiSelect(label string, options []string) ([]string, error) {
 
 	r := newReader()
 	input, err := r.ReadString('\n')
+	if err != nil && strings.TrimSpace(input) == "" {
+		return []string{}, nil
+	}
 	if err != nil {
 		return nil, err
 	}

pkg/cli/prompt_test.go

@@ -79,6 +79,15 @@ func TestMultiSelect_Good_CommasAndRanges(t *testing.T) {
 	assert.Equal(t, []string{"a", "b", "d"}, vals)
 }
 
+func TestMultiSelect_Bad_EOFReturnsEmptySelection(t *testing.T) {
+	SetStdin(strings.NewReader(""))
+	defer SetStdin(nil)
+
+	vals, err := MultiSelect("Pick", []string{"a", "b", "c"})
+	assert.NoError(t, err)
+	assert.Empty(t, vals)
+}
+
 func TestConfirm_Good(t *testing.T) {
 	SetStdin(strings.NewReader("y\n"))
 	defer SetStdin(nil)