Add helper method to exit with error code

.gitignore

@@ -15,3 +15,4 @@
 # Dependency directories (remove the comment below to include it)
 # vendor/
 
+.lumerc

.lumerc.sample

@@ -1 +1 @@
-AccessToken = "token"
+access_token = "token"

cmd/command.go

@@ -1,15 +1,21 @@
 package lumecmd
 
 import (
+	"errors"
 	"flag"
 	"fmt"
 	"strconv"
 
-	"git.kill0.net/chill9/lume"
+	lifx "git.kill0.net/chill9/lume"
+)
+
+const (
+	ExitSuccess = iota
+	ExitError
 )
 
 type Config struct {
-	AccessToken string
+	AccessToken string               `toml:"access_token"`
 	Colors      map[string][]float32 `toml:"colors"`
 }
 
@@ -87,3 +93,12 @@ func GetCommand(name string) (Command, bool) {
 	cmd, ok := commandRegistry[name]
 	return cmd, ok
 }
+
+// Validate configuration struct
+func (c *Config) Validate() error {
+	var err error
+	if c.AccessToken == "" {
+		err = errors.New("access_token is not set")
+	}
+	return err
+}

cmd/help.go

@@ -25,8 +25,8 @@ func HelpCmd(args CmdArgs) (int, error) {
 	} else if len(argv) >= 1 {
 		subCmd, ok := commandRegistry[argv[0]]
 		if !ok {
-			fmt.Printf("unknown command: %s\n", argv[0])
-			return 1, nil
+			fmt.Printf("unknown commnnd: %s\n", argv[0])
+			return ExitError, nil
 		}
 
 		if subCmd.Use != "" {
@@ -38,7 +38,7 @@ func HelpCmd(args CmdArgs) (int, error) {
 		subCmd.Flags.PrintDefaults()
 	}
 
-	return 0, nil
+	return ExitSuccess, nil
 }
 
 func printHelp(commands map[string]Command) {

cmd/ls.go

@@ -4,10 +4,6 @@ import (
 	"flag"
 )
 
-var (
-	idWidth, locationWidth, groupWidth, labelWidth, lastSeenWidth, powerWidth int
-)
-
 func init() {
 	var cmdName string = "ls"
 	fs := flag.NewFlagSet(cmdName, flag.ExitOnError)
@@ -27,8 +23,8 @@ func LsCmd(args CmdArgs) (int, error) {
 	selector := args.Flags.String("selector")
 	lights, err := c.ListLights(selector)
 	if err != nil {
-		return 1, err
+		return ExitError, err
 	}
 	PrintLights(lights)
-	return 0, nil
+	return ExitSuccess, nil
 }

cmd/lume/init_windows.go

@@ -0,0 +1,19 @@
+// +build windows
+
+// https://stackoverflow.com/a/52579002
+
+package main
+
+import (
+	"os"
+
+	"golang.org/x/sys/windows"
+)
+
+func init() {
+	stdout := windows.Handle(os.Stdout.Fd())
+	var originalMode uint32
+
+	windows.GetConsoleMode(stdout, &originalMode)
+	windows.SetConsoleMode(stdout, originalMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+}

cmd/lume/main.go

@@ -1,90 +1,11 @@
 package main
 
 import (
-	"flag"
-	"fmt"
 	"os"
-	"path"
 
-	lifx "git.kill0.net/chill9/lume"
 	lumecmd "git.kill0.net/chill9/lume/cmd"
-	"github.com/BurntSushi/toml"
-
-	"golang.org/x/sys/windows"
 )
 
-const lumercFile = ".lumerc"
-
 func main() {
-	var originalMode uint32
-	stdout := windows.Handle(os.Stdout.Fd())
-
-	windows.GetConsoleMode(stdout, &originalMode)
-	windows.SetConsoleMode(stdout, originalMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
-	defer windows.SetConsoleMode(stdout, originalMode)
-
-	var config lumecmd.Config
-	config = loadConfig()
-
-	if config.AccessToken == "" {
-		config.AccessToken = os.Getenv("LIFX_ACCESS_TOKEN")
-	}
-
-	if config.AccessToken == "" {
-		fmt.Println("access token is not set")
-		os.Exit(1)
-	}
-
-	flag.Parse()
-
-	command := flag.Arg(0)
-
-	c := lifx.NewClient(config.AccessToken)
-
-	cmdArgs := lumecmd.CmdArgs{
-		Client: c,
-		Config: config,
-	}
-
-	cmd, ok := lumecmd.GetCommand(command)
-	if !ok {
-		fmt.Printf("lume: '%s' is not lume command. See 'lume help'\n", command)
-		os.Exit(1)
-	}
-	fs := cmd.Flags
-	fs.Parse(os.Args[2:])
-
-	cmdArgs.Flags = lumecmd.Flags{fs}
-	exitCode, err := cmd.Func(cmdArgs)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "fatal: %s\n", err)
-	}
-	os.Exit(exitCode)
-}
-
-func loadConfig() lumecmd.Config {
-	var config lumecmd.Config
-	var tryPath, configPath string
-
-	homeDir, err := os.UserHomeDir()
-	if err == nil {
-		tryPath = path.Join(homeDir, lumercFile)
-		if _, err := os.Stat(tryPath); !os.IsNotExist(err) {
-			configPath = tryPath
-		}
-	}
-
-	cwd, err := os.Getwd()
-	if err == nil {
-		tryPath = path.Join(cwd, lumercFile)
-		if _, err := os.Stat(tryPath); !os.IsNotExist(err) {
-			configPath = tryPath
-		}
-	}
-
-	if configPath != "" {
-		toml.DecodeFile(configPath, &config)
-	}
-
-	return config
+	lumecmd.ExitWithCode(lumecmd.Main(os.Args))
 }

cmd/main.go

@@ -0,0 +1,90 @@
+package lumecmd
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"os"
+	"path"
+
+	lifx "git.kill0.net/chill9/lume"
+	"github.com/BurntSushi/toml"
+)
+
+const lumercFile string = ".lumerc"
+
+func Main(args []string) (int, error) {
+	var config Config
+	var err error
+
+	configPath := getConfigPath()
+	if configPath == "" {
+		err = errors.New("fatal: ~/.lumerc was not found")
+		return ExitError, err
+	}
+
+	if _, err := toml.DecodeFile(configPath, &config); err != nil {
+		err = fmt.Errorf("fatal: failed to parse %s", configPath)
+		return ExitError, err
+	}
+
+	envAccessToken := os.Getenv("LIFX_ACCESS_TOKEN")
+	if envAccessToken != "" {
+		config.AccessToken = envAccessToken
+	}
+
+	if err = config.Validate(); err != nil {
+		return ExitError, fmt.Errorf("fatal: %s", err)
+	}
+
+	flag.Parse()
+
+	command := flag.Arg(0)
+
+	c := lifx.NewClient(config.AccessToken)
+
+	cmdArgs := CmdArgs{
+		Client: c,
+		Config: config,
+	}
+
+	cmd, ok := GetCommand(command)
+	if !ok {
+		err = fmt.Errorf("lume: '%s' is not lume command. See 'lume help'", command)
+		return ExitError, err
+	}
+	fs := cmd.Flags
+	fs.Parse(args[2:])
+
+	cmdArgs.Flags = Flags{FlagSet: fs}
+	exitCode, err := cmd.Func(cmdArgs)
+	if err != nil {
+		err = fmt.Errorf("fatal: %s", err)
+	}
+
+	return exitCode, err
+}
+
+func getConfigPath() string {
+	var tryPath, configPath string
+
+	// ~/.lumerc
+	homeDir, err := os.UserHomeDir()
+	if err == nil {
+		tryPath = path.Join(homeDir, lumercFile)
+		if _, err := os.Stat(tryPath); !os.IsNotExist(err) {
+			configPath = tryPath
+		}
+	}
+
+	// ./.lumerc
+	cwd, err := os.Getwd()
+	if err == nil {
+		tryPath = path.Join(cwd, lumercFile)
+		if _, err := os.Stat(tryPath); !os.IsNotExist(err) {
+			configPath = tryPath
+		}
+	}
+
+	return configPath
+}

cmd/poweroff.go

@@ -0,0 +1,40 @@
+package lumecmd
+
+import (
+	"flag"
+
+	lifx "git.kill0.net/chill9/lume"
+)
+
+func init() {
+	var cmdName string = "poweroff"
+
+	fs := flag.NewFlagSet(cmdName, flag.ExitOnError)
+
+	duration := fs.Float64("duration", defaultDuration, "Set the duration")
+	fs.Float64Var(duration, "d", defaultDuration, "Set the duration")
+
+	selector := fs.String("selector", defaultSelector, "Set the selector")
+	fs.StringVar(selector, "s", defaultSelector, "Set the selector")
+
+	RegisterCommand(cmdName, Command{
+		Func:  PoweroffCmd,
+		Flags: fs,
+		Use:   "[--selector <selector>] [--duration <sec>]",
+		Short: "Power on",
+	})
+}
+
+func PoweroffCmd(args CmdArgs) (int, error) {
+	c := args.Client
+	duration := args.Flags.Float64("duration")
+	selector := args.Flags.String("selector")
+	state := lifx.State{Power: "off", Duration: duration}
+
+	r, err := c.SetState(selector, state)
+	if err != nil {
+		return ExitError, err
+	}
+	PrintResults(r.Results)
+	return ExitSuccess, nil
+}

cmd/poweron.go

@@ -0,0 +1,40 @@
+package lumecmd
+
+import (
+	"flag"
+
+	lifx "git.kill0.net/chill9/lume"
+)
+
+func init() {
+	var cmdName string = "poweron"
+
+	fs := flag.NewFlagSet(cmdName, flag.ExitOnError)
+
+	duration := fs.Float64("duration", defaultDuration, "Set the duration")
+	fs.Float64Var(duration, "d", defaultDuration, "Set the duration")
+
+	selector := fs.String("selector", defaultSelector, "Set the selector")
+	fs.StringVar(selector, "s", defaultSelector, "Set the selector")
+
+	RegisterCommand(cmdName, Command{
+		Func:  PoweronCmd,
+		Flags: fs,
+		Use:   "[--selector <selector>] [--duration <sec>]",
+		Short: "Power on",
+	})
+}
+
+func PoweronCmd(args CmdArgs) (int, error) {
+	c := args.Client
+	duration := args.Flags.Float64("duration")
+	selector := args.Flags.String("selector")
+	state := lifx.State{Power: "on", Duration: duration}
+
+	r, err := c.SetState(selector, state)
+	if err != nil {
+		return ExitError, err
+	}
+	PrintResults(r.Results)
+	return ExitSuccess, nil
+}

cmd/setcolor.go

@@ -4,7 +4,7 @@ import (
 	"flag"
 	"fmt"
 
-	"git.kill0.net/chill9/lume"
+	lifx "git.kill0.net/chill9/lume"
 )
 
 func init() {
@@ -81,17 +81,17 @@ func SetColorCmd(args CmdArgs) (int, error) {
 	} else if rgbFlag != "" {
 		color, err := parseRGB(rgbFlag)
 		if err != nil {
-			return 1, err
+			return ExitError, err
 		}
 		state.Color = color
 	} else if name != "" {
 		hsb, ok := args.Config.Colors[name]
 		if !ok {
-			return 1, fmt.Errorf("%s is not a defined color", name)
+			return ExitError, fmt.Errorf("%s is not a defined color", name)
 		}
 		color, err := lifx.NewHSBColor(hsb[0], hsb[1], hsb[2])
 		if err != nil {
-			return 1, err
+			return ExitError, err
 		}
 		state.Color = color
 	}
@@ -111,12 +111,12 @@ func SetColorCmd(args CmdArgs) (int, error) {
 	r, err := c.SetState(selector, state)
 	if err != nil {
 		fmt.Printf("fatal: %s\n", err)
-		return 1, err
+		return ExitError, err
 	}
 
 	if !fast {
 		PrintResults(r.Results)
 	}
 
-	return 0, nil
+	return ExitSuccess, nil
 }

cmd/setstate.go

@@ -3,7 +3,7 @@ package lumecmd
 import (
 	"flag"
 
-	"git.kill0.net/chill9/lume"
+	lifx "git.kill0.net/chill9/lume"
 )
 
 func init() {
@@ -75,12 +75,12 @@ func SetStateCmd(args CmdArgs) (int, error) {
 
 	r, err := c.SetState(selector, state)
 	if err != nil {
-		return 1, err
+		return ExitError, err
 	}
 
 	if !fast {
 		PrintResults(r.Results)
 	}
 
-	return 0, nil
+	return ExitSuccess, nil
 }

cmd/setwhite.go

@@ -3,7 +3,7 @@ package lumecmd
 import (
 	"flag"
 
-	"git.kill0.net/chill9/lume"
+	lifx "git.kill0.net/chill9/lume"
 )
 
 func init() {
@@ -58,7 +58,7 @@ func SetWhiteCmd(args CmdArgs) (int, error) {
 		kelvin := args.Flags.Int16("kelvin")
 		color, err := lifx.NewWhite(kelvin)
 		if err != nil {
-			return 1, err
+			return ExitError, err
 		}
 		state.Color = color
 	}
@@ -68,7 +68,7 @@ func SetWhiteCmd(args CmdArgs) (int, error) {
 		name := args.Flags.String("name")
 		color, err := lifx.NewWhiteString(name)
 		if err != nil {
-			return 1, err
+			return ExitError, err
 		}
 		state.Color = color
 	}
@@ -93,12 +93,12 @@ func SetWhiteCmd(args CmdArgs) (int, error) {
 
 	r, err := c.SetState(selector, state)
 	if err != nil {
-		return 1, err
+		return ExitError, err
 	}
 
 	if !fast {
 		PrintResults(r.Results)
 	}
 
-	return 0, nil
+	return ExitSuccess, nil
 }

cmd/toggle.go

@@ -29,8 +29,8 @@ func ToggleCmd(args CmdArgs) (int, error) {
 	selector := args.Flags.String("selector")
 	r, err := c.Toggle(selector, duration)
 	if err != nil {
-		return 1, err
+		return ExitError, err
 	}
 	PrintResults(r.Results)
-	return 0, nil
+	return ExitSuccess, nil
 }

cmd/util.go

@@ -2,11 +2,13 @@ package lumecmd
 
 import (
 	"fmt"
+	"os"
+	"sort"
 	"strconv"
 	"strings"
 	"time"
 
-	"git.kill0.net/chill9/lume"
+	lifx "git.kill0.net/chill9/lume"
 )
 
 func powerColor(s string) string {
@@ -28,78 +30,88 @@ func statusColor(s lifx.Status) string {
 }
 
 func PrintResults(res []lifx.Result) {
-	var length, idWidth, labelWidth, statusWidth int
+	var length int
+	var widths map[string]int
+
+	widths = make(map[string]int)
 
 	for _, r := range res {
 		length = len(r.Id)
-		if idWidth < length {
-			idWidth = length
+		if widths["id"] < length {
+			widths["id"] = length
 		}
 
 		length = len(r.Label)
-		if labelWidth < length {
-			labelWidth = length
+		if widths["label"] < length {
+			widths["label"] = length
 		}
 
 		length = len(r.Status)
-		if statusWidth < length {
-			statusWidth = length
+		if widths["status"] < length {
+			widths["status"] = length
 		}
 	}
 
+	sortResults(res)
+
 	for _, r := range res {
 		fmt.Printf("%*s %*s %*s\n",
-			idWidth, r.Id,
-			labelWidth, r.Label,
-			statusWidth, statusColor(r.Status))
+			widths["id"], r.Id,
+			widths["label"], r.Label,
+			widths["status"], statusColor(r.Status))
 	}
 }
 
 func PrintLights(lights []lifx.Light) {
 	var length int
+	var widths map[string]int
+
+	widths = make(map[string]int)
 
 	for _, l := range lights {
 		length = len(l.Id)
-		if idWidth < length {
-			idWidth = length
+		if widths["id"] < length {
+			widths["id"] = length
 		}
 
 		length = len(l.Location.Name)
-		if locationWidth < length {
-			locationWidth = length
+		if widths["location"] < length {
+			widths["location"] = length
 		}
 
 		length = len(l.Group.Name)
-		if groupWidth < length {
-			groupWidth = length
+		if widths["group"] < length {
+			widths["group"] = length
 		}
 
 		length = len(l.Label)
-		if labelWidth < length {
-			labelWidth = length
+		if widths["label"] < length {
+			widths["label"] = length
 		}
 
 		length = len(l.LastSeen.Local().Format(time.RFC3339))
-		if lastSeenWidth < length {
-			lastSeenWidth = length
+		if widths["last_seen"] < length {
+			widths["last_seen"] = length
 		}
 
 		length = len(l.Power)
-		if powerWidth < length {
-			powerWidth = length
+		if widths["power"] < length {
+			widths["power"] = length
 		}
 	}
 
+	sortLights(lights)
+
 	fmt.Printf("total %d\n", len(lights))
 	for _, l := range lights {
 		fmt.Printf(
 			"%*s %*s %*s %*s %*s %-*s\n",
-			idWidth, l.Id,
-			locationWidth, l.Location.Name,
-			groupWidth, l.Group.Name,
-			labelWidth, l.Label,
-			lastSeenWidth, l.LastSeen.Local().Format(time.RFC3339),
-			powerWidth, powerColor(l.Power),
+			widths["id"], l.Id,
+			widths["loction"], l.Location.Name,
+			widths["group"], l.Group.Name,
+			widths["label"], l.Label,
+			widths["last_seen"], l.LastSeen.Local().Format(time.RFC3339),
+			widths["power"], powerColor(l.Power),
 		)
 	}
 }
@@ -121,3 +133,29 @@ func parseRGB(s string) (lifx.RGBColor, error) {
 	}
 	return lifx.NewRGBColor(uint8(r), uint8(g), uint8(b))
 }
+
+func sortLights(lights []lifx.Light) {
+	sort.Slice(lights, func(i, j int) bool {
+		if lights[i].Group.Name < lights[j].Group.Name {
+			return true
+		}
+		if lights[i].Group.Name > lights[j].Group.Name {
+			return false
+		}
+		return lights[i].Label < lights[j].Label
+
+	})
+}
+
+func sortResults(res []lifx.Result) {
+	sort.Slice(res, func(i, j int) bool {
+		return res[i].Label < res[j].Label
+	})
+}
+
+func ExitWithCode(code int, err error) {
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%s\n", err)
+	}
+	os.Exit(code)
+}