one binary with subcommands

src/mcquay.me/yay/cmd/yay/main.go

@@ -1,33 +1,31 @@
 package main
 
-import "mcquay.me/yay"
+import (
+	"fmt"
+	"os"
 
-type Yay struct {
-	yay.Sequence
-}
+	"mcquay.me/yay"
+)
 
-func NewYay() *Yay {
-	y := &Yay{
-		yay.Sequence{
-			Frames: [][]rune{
-				[]rune(`.o.`),
-				[]rune(`.o.`),
-				[]rune(`.o.`),
-				[]rune(`.o.`),
-				[]rune(`.o.`),
-				[]rune(`.o.`),
-				[]rune(`-o-`),
-				[]rune(`\o/`),
-				[]rune(`\o/`),
-				[]rune(`\o/`),
-				[]rune(`-o-`),
-			},
-		},
-	}
-	return y
-}
+const usage = "usage: yay <shrug|dance>"
 
 func main() {
-	t := yay.NewViewPort(NewYay())
+	cmd := "yay"
+	if len(os.Args) > 1 {
+		cmd = os.Args[1]
+	}
+	var t *yay.ViewPort
+
+	switch cmd {
+	case "yay":
+		t = yay.NewViewPort(yay.NewYay())
+	case "shrug":
+		t = yay.NewViewPort(yay.NewShrug())
+	case "dance":
+		t = yay.NewViewPort(yay.NewDance())
+	default:
+		fmt.Fprintf(os.Stderr, "%s\n", usage)
+		os.Exit(1)
+	}
 	t.Run()
 }

src/mcquay.me/yay/dance.go

@@ -1,14 +1,12 @@
-package main
-
-import "mcquay.me/yay"
+package yay
 
 type Dance struct {
-	yay.Sequence
+	Sequence
 }
 
 func NewDance() *Dance {
 	d := &Dance{
-		yay.Sequence{
+		Sequence{
 			Frames: [][]rune{
 				[]rune(`<('o'<)  `),
 				[]rune(`  ('-')  `),
@@ -22,8 +20,3 @@ func NewDance() *Dance {
 	}
 	return d
 }
-
-func main() {
-	t := yay.NewViewPort(NewDance())
-	t.Run()
-}

src/mcquay.me/yay/shrug.go

@@ -1,14 +1,12 @@
-package main
-
-import "mcquay.me/yay"
+package yay
 
 type Shrug struct {
-	yay.Sequence
+	Sequence
 }
 
 func NewShrug() *Shrug {
 	return &Shrug{
-		yay.Sequence{
+		Sequence{
 			Frames: [][]rune{
 				[]rune(`¯\_(ツ )_/¯`),
 				[]rune(`¯\_(ツ )_/¯`),
@@ -20,8 +18,3 @@ func NewShrug() *Shrug {
 		},
 	}
 }
-
-func main() {
-	t := yay.NewViewPort(NewShrug())
-	t.Run()
-}

src/mcquay.me/yay/yay.go

@@ -0,0 +1,26 @@
+package yay
+
+type Yay struct {
+	Sequence
+}
+
+func NewYay() *Yay {
+	y := &Yay{
+		Sequence{
+			Frames: [][]rune{
+				[]rune(`.o.`),
+				[]rune(`.o.`),
+				[]rune(`.o.`),
+				[]rune(`.o.`),
+				[]rune(`.o.`),
+				[]rune(`.o.`),
+				[]rune(`-o-`),
+				[]rune(`\o/`),
+				[]rune(`\o/`),
+				[]rune(`\o/`),
+				[]rune(`-o-`),
+			},
+		},
+	}
+	return y
+}