initial skeleton

.gitignore

@@ -21,3 +21,5 @@ _testmain.go
 
 *.exe
 *.test
+
+dockviz*

cli.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"os"
+
+	"github.com/jessevdk/go-flags"
+)
+
+type GlobalOptions struct {
+	// no options yet
+}
+
+var globalOptions GlobalOptions
+var parser = flags.NewParser(&globalOptions, flags.Default)
+
+func main() {
+	if _, err := parser.Parse(); err != nil {
+		os.Exit(1)
+	}
+}

images.go

@@ -0,0 +1,28 @@
+package main
+
+import "fmt"
+
+type ImagesCommand struct {
+	Dot  bool `short:"d" long:"dot" description:"Show image information as Graphviz dot."`
+	Tree bool `short:"t" long:"tree" description:"Show image information as tree."`
+}
+
+var imagesCommand ImagesCommand
+
+func (x *ImagesCommand) Execute(args []string) error {
+
+	if imagesCommand.Dot {
+		fmt.Println("Output dot")
+	} else if imagesCommand.Tree {
+		fmt.Println("Output tree")
+	}
+
+	return nil
+}
+
+func init() {
+	parser.AddCommand("images",
+		"Visualize docker images.",
+		"",
+		&imagesCommand)
+}