Use terminal color library

cmd/print.go

@@ -0,0 +1,24 @@
+package lumecmd
+
+import (
+	"git.kill0.net/chill9/lifx-go"
+	"github.com/fatih/color"
+)
+
+func ColorizePower(s string) string {
+	c := color.New(color.FgRed)
+	if s == "on" {
+		c = color.New(color.FgGreen)
+	}
+
+	return c.Sprint(s)
+}
+
+func ColorizeStatus(s lifx.Status) string {
+	c := color.New(color.FgRed)
+	if s == "ok" {
+		c = color.New(color.FgGreen)
+	}
+
+	return c.Sprint(s)
+}

cmd/show.go

@@ -42,7 +42,7 @@ func ShowCmd(args CmdArgs) (int, error) {
 			"Light ID: %s, %s, Power: %s\n",
 			l.Id,
 			connected(l.Connected),
-			powerColor(l.Power),
+			ColorizePower(l.Power),
 		)
 		indent += Tabstop
 		PrintfWithIndent(indent, "Label: %s, ID: %s\n", l.Label, l.Id)

cmd/util.go

@@ -11,24 +11,6 @@ import (
 	"git.kill0.net/chill9/lifx-go"
 )
 
-func powerColor(s string) string {
-	fs := "\033[1;31m%s\033[0m"
-	if s == "on" {
-		fs = "\033[1;32m%s\033[0m"
-	}
-
-	return fmt.Sprintf(fs, s)
-}
-
-func statusColor(s lifx.Status) string {
-	fs := "\033[1;31m%s\033[0m"
-	if s == "ok" {
-		fs = "\033[1;32m%s\033[0m"
-	}
-
-	return fmt.Sprintf(fs, s)
-}
-
 func PrintResults(res []lifx.Result) {
 	var length int
 	var widths map[string]int
@@ -58,7 +40,7 @@ func PrintResults(res []lifx.Result) {
 		fmt.Printf("%*s %*s %*s\n",
 			widths["id"], r.Id,
 			widths["label"], r.Label,
-			widths["status"], statusColor(r.Status))
+			widths["status"], ColorizeStatus(r.Status))
 	}
 }
 
@@ -111,7 +93,7 @@ func PrintLights(lights []lifx.Light) {
 			widths["group"], l.Group.Name,
 			widths["label"], l.Label,
 			widths["last_seen"], l.LastSeen.Local().Format(time.RFC3339),
-			widths["power"], powerColor(l.Power),
+			widths["power"], ColorizePower(l.Power),
 		)
 	}
 }

go.mod

@@ -5,5 +5,6 @@ go 1.15
 require (
 	git.kill0.net/chill9/lifx-go v0.0.0-20210215004437-f86c28b0a5ef
 	github.com/BurntSushi/toml v0.3.1
+	github.com/fatih/color v1.10.0
 	golang.org/x/sys v0.0.0-20210110051926-789bb1bd4061
 )

go.sum

@@ -2,5 +2,13 @@ git.kill0.net/chill9/lifx-go v0.0.0-20210215004437-f86c28b0a5ef h1:8yyXAk+qiRvro
 git.kill0.net/chill9/lifx-go v0.0.0-20210215004437-f86c28b0a5ef/go.mod h1:ZFKIcwdJ4Nqlrkn/eUHbeLt0NVhFsfxBREkVoA+jzUc=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/fatih/color v1.10.0 h1:s36xzo75JdqLaaWoiEHk767eHiwo0598uUxyfiPkDsg=
+github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
+github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
+github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
+github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210110051926-789bb1bd4061 h1:DQmQoKxQWtyybCtX/3dIuDBcAhFszqq8YiNeS6sNu1c=
 golang.org/x/sys v0.0.0-20210110051926-789bb1bd4061/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=