Add list command (#43)

* [feature] Add "list" command

config.go

@@ -65,3 +65,18 @@ func ParseConfig(data string) (Config, error) {
 
 	return c, nil
 }
+
+func ListConfigs(path string) ([]string, error) {
+	var result []string
+	files, err := os.ReadDir(path)
+
+	if err != nil {
+		return result, err
+	}
+
+	for _, file := range files {
+		result = append(result, file.Name())
+	}
+
+	return result, nil
+}

main.go

@@ -5,9 +5,10 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"strings"
 )
 
-const version = "v0.1.8"
+const version = "v0.1.9"
 
 var usage = fmt.Sprintf(`Smug - tmux session manager. Version %s
 
@@ -22,6 +23,7 @@ Options:
 	-d, --debug %s
 
 Examples:
+	$ smug list
 	$ smug start blog
 	$ smug start blog:win1
 	$ smug start blog -w win1
@@ -111,6 +113,14 @@ func main() {
 			fmt.Fprintf(os.Stderr, err.Error())
 			os.Exit(1)
 		}
+	case CommandList:
+		configs, err := ListConfigs(userConfigDir)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, err.Error())
+			os.Exit(1)
+		}
+
+		fmt.Println(strings.Join(configs, "\n"))
 	}
 
 }

options.go

@@ -12,9 +12,10 @@ const (
 	CommandStop  = "stop"
 	CommandNew   = "new"
 	CommandEdit  = "edit"
+	CommandList  = "list"
 )
 
-var validCommands = []string{CommandStart, CommandStop, CommandNew, CommandEdit}
+var validCommands = []string{CommandStart, CommandStop, CommandNew, CommandEdit, CommandList}
 
 type Options struct {
 	Command string
@@ -74,13 +75,8 @@ func ParseOptions(argv []string, helpRequested func()) (Options, error) {
 		return Options{}, err
 	}
 
-	if len(argv) < 2 && *config == "" {
-		helpRequested()
-		return Options{}, ErrHelp
-	}
-
 	var project string
-	if *config == "" {
+	if *config == "" && len(argv) > 1 {
 		project = argv[1]
 	}
 

options_test.go

@@ -56,24 +56,12 @@ var usageTestTable = []struct {
 		nil,
 		0,
 	},
-	{
-		[]string{"start"},
-		Options{},
-		ErrHelp,
-		1,
-	},
 	{
 		[]string{"start", "--help"},
 		Options{},
 		ErrHelp,
 		1,
 	},
-	{
-		[]string{"start"},
-		Options{},
-		ErrHelp,
-		1,
-	},
 	{
 		[]string{"test"},
 		Options{},