Implement CLI scaffold

cmd/mailfull/main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/directorz/mailfull-go"
+	"github.com/directorz/mailfull-go/cmd/mailfull/command"
+	"github.com/mitchellh/cli"
+)
+
+var (
+	version = mailfull.Version
+	gittag  = ""
+)
+
+func init() {
+	if gittag != "" {
+		version = version + "-" + gittag
+	}
+}
+
+func main() {
+	c := &cli.CLI{
+		Name:    filepath.Base(os.Args[0]),
+		Version: version,
+		Args:    os.Args[1:],
+	}
+
+	meta := command.Meta{
+		UI: &cli.BasicUi{
+			Reader:      os.Stdin,
+			Writer:      os.Stdout,
+			ErrorWriter: os.Stderr,
+		},
+		CmdName: c.Name,
+		Version: c.Version,
+	}
+
+	c.Commands = map[string]cli.CommandFactory{
+		"init": func() (cli.Command, error) {
+			meta.SubCmdName = c.Subcommand()
+			return &command.InitCommand{Meta: meta}, nil
+		},
+	}
+
+	exitCode, err := c.Run()
+	if err != nil {
+		fmt.Fprintf(meta.UI.ErrorWriter, "%v\n", err)
+	}
+
+	os.Exit(exitCode)
+}