feat: add shell login option (#75)

Closes #72

README.md

@@ -156,6 +156,7 @@ iris config show
 [core]
 version = 1
 shell = ""        # "zsh", "bash", "fish", or empty for auto-detection
+shell-login = false # run the selected shell as a login shell; can also be enabled with iris --shell-login
 mode = "last"     # "last", "spec", or "history"
 debug = false
 expand-alias = true

internal/config/config.go

@@ -35,6 +35,7 @@ func (d Duration) MarshalText() ([]byte, error) {
 type CoreConfig struct {
 	Version     int    `toml:"version"`
 	Shell       string `toml:"shell"`
+	ShellLogin  bool   `toml:"shell-login"`
 	Mode        string `toml:"mode"`
 	Debug       bool   `toml:"debug"`
 	ExpandAlias bool   `toml:"expand-alias"`

internal/config/config_test.go

@@ -12,6 +12,9 @@ func TestDefaultConfigAndState(t *testing.T) {
 	if cfg.Core.Version != 1 {
 		t.Errorf("expected version 1, got %d", cfg.Core.Version)
 	}
+	if cfg.Core.ShellLogin {
+		t.Errorf("expected login shell to be disabled by default")
+	}
 	if cfg.UI.MaxSuggestions != 100 {
 		t.Errorf("expected suggestions 100, got %d", cfg.UI.MaxSuggestions)
 	}
@@ -90,14 +93,23 @@ func TestValidationAndEnvironmentOverrides(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 
+	// UserConfigDir follows HOME on macOS and XDG_CONFIG_HOME on Unix.
+	// Override both so the test cannot read or write the user's real config.
+	t.Setenv("HOME", tmpDir)
 	t.Setenv("XDG_CONFIG_HOME", tmpDir)
 
-	configDir := filepath.Join(tmpDir, "iris")
+	configPath, err := ConfigPath()
+	if err != nil {
+		t.Fatalf("failed to get config path: %v", err)
+	}
+	configDir := filepath.Dir(configPath)
 	if mkErr := os.MkdirAll(configDir, 0755); mkErr != nil {
 		t.Fatalf("failed to create config dir: %v", mkErr)
 	}
-	configPath := filepath.Join(configDir, "config.toml")
 	tomlContent := `
+[core]
+shell-login = true
+
 [ai]
 enabled = true
 provider = "groq"
@@ -132,6 +144,9 @@ model = "qwen-2.5-coder-32b"
 	if !cfg.Core.Debug {
 		t.Errorf("expected debug to be true")
 	}
+	if !cfg.Core.ShellLogin {
+		t.Errorf("expected login shell to be enabled from TOML")
+	}
 	if cfg.Core.Shell != "fish" {
 		t.Errorf("expected shell fish, got %q", cfg.Core.Shell)
 	}
@@ -178,6 +193,9 @@ func TestLoadSave(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 
+	// UserConfigDir follows HOME on macOS and XDG_CONFIG_HOME on Unix.
+	// Override both so the test cannot read or write the user's real config.
+	t.Setenv("HOME", tmpDir)
 	t.Setenv("XDG_CONFIG_HOME", tmpDir)
 
 	cfg, err := Load()
@@ -186,6 +204,7 @@ func TestLoadSave(t *testing.T) {
 	}
 
 	cfg.Core.Shell = "zsh"
+	cfg.Core.ShellLogin = true
 	cfg.UI.MaxHeight = 20
 
 	err = Save(cfg)
@@ -201,6 +220,9 @@ func TestLoadSave(t *testing.T) {
 	if loaded.Core.Shell != "zsh" {
 		t.Errorf("expected loaded shell to be zsh, got %q", loaded.Core.Shell)
 	}
+	if !loaded.Core.ShellLogin {
+		t.Errorf("expected loaded login shell setting to be true")
+	}
 	if loaded.UI.MaxHeight != 20 {
 		t.Errorf("expected loaded height to be 20, got %d", loaded.UI.MaxHeight)
 	}
@@ -250,5 +272,3 @@ func TestMigration(t *testing.T) {
 		t.Errorf("expected backup file update_state.json.bak to exist")
 	}
 }
-
-

internal/config/defaults.go

@@ -7,6 +7,7 @@ func DefaultConfig() *Config {
 		Core: CoreConfig{
 			Version:     1,
 			Shell:       "",
+			ShellLogin:  false,
 			Mode:        "last",
 			Debug:       false,
 			ExpandAlias: true,

root/config_cmd.go

@@ -43,6 +43,9 @@ version = 1
 # override shell: "bash", "zsh", "fish", keep empty for auto detection
 shell = ""
 
+# run the selected shell as a login shell
+shell-login = false
+
 # startup mode: "last", "spec", "history"
 # "last" = remember last mode used
 mode = "last"

root/config_cmd_test.go

@@ -3,8 +3,10 @@ package root
 import (
 	"bytes"
 	"os"
-	"path/filepath"
+	"strings"
 	"testing"
+
+	"github.com/versenilvis/iris/internal/config"
 )
 
 func TestConfigCommands(t *testing.T) {
@@ -14,14 +16,27 @@ func TestConfigCommands(t *testing.T) {
 	}
 	defer os.RemoveAll(tmpDir)
 
+	// UserConfigDir follows HOME on macOS and XDG_CONFIG_HOME on Unix.
+	// Override both so the command cannot read or write the user's real config.
+	t.Setenv("HOME", tmpDir)
 	t.Setenv("XDG_CONFIG_HOME", tmpDir)
 
 	ConfigInitCmd.Run(ConfigInitCmd, []string{})
 
-	configPath := filepath.Join(tmpDir, "iris", "config.toml")
+	configPath, err := config.ConfigPath()
-	if _, err := os.Stat(configPath); err != nil {
+	if err != nil {
+		t.Fatalf("failed to get config path: %v", err)
+	}
+	if _, statErr := os.Stat(configPath); statErr != nil {
 		t.Errorf("expected config file to be created at %s, but it was not", configPath)
 	}
+	content, err := os.ReadFile(configPath)
+	if err != nil {
+		t.Fatalf("failed to read config file: %v", err)
+	}
+	if !strings.Contains(string(content), "shell-login = false") {
+		t.Error("expected initialized config to include shell-login = false")
+	}
 
 	buf := new(bytes.Buffer)
 	ConfigShowCmd.SetOut(buf)

root/init.go

@@ -148,7 +148,7 @@ var setupCmd = &cobra.Command{
 
 		var shellName string
 		if len(args) > 0 {
-			shellName = args[0]
+			shellName = filepath.Base(args[0])
 		} else {
 			shellPath := os.Getenv("SHELL")
 			shellName = filepath.Base(shellPath)
@@ -208,6 +208,9 @@ version = 1
 # override shell: "bash", "zsh", "fish", keep empty for auto detection
 shell = ""
 
+# run the selected shell as a login shell
+shell-login = false
+
 # startup mode: "last", "spec", "history"
 # "last" = remember last mode used
 mode = "last"

root/root.go

@@ -50,24 +50,29 @@ It works exactly like coding editor suggestion menu drop down.`,
 			runWrapper()
 		},
 	}
-	shellFlag   string
+	shellFlag      string
-	debugMode   bool
+	shellLoginFlag bool
+	debugMode      bool
 )
 
 func init() {
 	rootCmd.PersistentFlags().StringVarP(&shellFlag, "shell", "s", "", "shell to use (bash, zsh, fish)")
+	rootCmd.PersistentFlags().BoolVar(&shellLoginFlag, "shell-login", false, "run the selected shell as a login shell")
 	rootCmd.PersistentFlags().BoolVarP(&debugMode, "debug", "d", false, "enable debug logging to iris.log")
 
 	rootCmd.PersistentPreRun = func(cmd *cobra.Command, args []string) {
 		if shellFlag != "" {
 			config.Get().Core.Shell = shellFlag
 		}
+		if cmd.Flags().Changed("shell-login") {
+			config.Get().Core.ShellLogin = shellLoginFlag
+		}
 		logDir, err := config.CachePath()
 		if err == nil {
 			logger.Init(filepath.Join(logDir, "iris.log"), debugMode || config.Get().Core.Debug)
 			logger.Infof("IRIS session started: os=%s, arch=%s, go=%s, pid=%d", runtime.GOOS, runtime.GOARCH, runtime.Version(), os.Getpid())
 			cfg := config.Get()
-			logger.Debugf("IRIS loaded config: shell=%q, mode=%q, ghost-text=%v, max-suggestions=%d", cfg.Core.Shell, cfg.Core.Mode, cfg.UI.GhostText, cfg.UI.MaxSuggestions)
+			logger.Debugf("IRIS loaded config: shell=%q, shell-login=%v, mode=%q, ghost-text=%v, max-suggestions=%d", cfg.Core.Shell, cfg.Core.ShellLogin, cfg.Core.Mode, cfg.UI.GhostText, cfg.UI.MaxSuggestions)
 		}
 	}
 }

root/shell_args_test.go

@@ -0,0 +1,35 @@
+package root
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestShellArgs(t *testing.T) {
+	tests := []struct {
+		name  string
+		login bool
+		want  []string
+	}{
+		{name: "login", login: true, want: []string{"--login"}},
+		{name: "non-login", login: false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := shellArgs(tt.login); !reflect.DeepEqual(got, tt.want) {
+				t.Fatalf("shellArgs(%v) = %v, want %v", tt.login, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestShellLoginFlagIsRegistered(t *testing.T) {
+	flag := rootCmd.PersistentFlags().Lookup("shell-login")
+	if flag == nil {
+		t.Fatal("expected --shell-login flag to be registered")
+	}
+	if flag.DefValue != "false" {
+		t.Fatalf("expected --shell-login to default to false, got %q", flag.DefValue)
+	}
+}

root/wrapper.go

@@ -82,6 +82,13 @@ func saveMode(mode string) {
 	_ = config.SaveState(state)
 }
 
+func shellArgs(login bool) []string {
+	if login {
+		return []string{"--login"}
+	}
+	return nil
+}
+
 var (
 	oldState     *term.State
 	oldStateFd   int
@@ -141,7 +148,7 @@ func runWrapper() {
 	adapter := shell.Current
 
 	ctx := context.Background()
-	c := exec.CommandContext(ctx, adapter.GetShellPath())
+	c := exec.CommandContext(ctx, adapter.GetShellPath(), shellArgs(config.Get().Core.ShellLogin)...)
 	c.ExtraFiles = make([]*os.File, 11)
 	// pass write end of pipe to shell as fd 13 (since index 10 maps to 13)
 	c.ExtraFiles[10] = w