mfer/src/app.go

package mfer

import (
	"fmt"
	"log"
	"os"
	"path/filepath"

	"github.com/pterm/pterm"
	"github.com/urfave/cli/v2"
)

func printBanner(Appname, Version, Buildarch string) {
	s, _ := pterm.DefaultBigText.WithLetters(pterm.NewLettersFromString(Appname)).Srender()
	pterm.DefaultCenter.Println(s) // Print BigLetters with the default CenterPrinter
}

func disableStyling() {
	pterm.DisableColor()
	pterm.DisableStyling()
	pterm.Debug.Prefix.Text = ""
	pterm.Info.Prefix.Text = ""
	pterm.Success.Prefix.Text = ""
	pterm.Warning.Prefix.Text = ""
	pterm.Error.Prefix.Text = ""
	pterm.Fatal.Prefix.Text = ""
}

func init() {
	if _, exists := os.LookupEnv("NO_COLOR"); exists {
		disableStyling()
	}
}

func Run(Appname, Version, Buildarch string) int {
	printBanner(Appname, Version, Buildarch)
	app := &cli.App{
		Name:                 Appname,
		Usage:                "Manifest generator",
		Version:              Version,
		EnableBashCompletion: true,
		Commands: []*cli.Command{
			{
				Name:    "generate",
				Aliases: []string{"gen"},
				Usage:   "Generate manifest file",
				Action: func(c *cli.Context) error {
					return generateManifest(c.String("input"), c.String("output"))
				},
				Flags: []cli.Flag{
					&cli.StringFlag{
						Name:    "input",
						Value:   ".",
						Aliases: []string{"i"},
						Usage:   "Specify input directory.",
					},
					&cli.StringFlag{
						Name:    "output",
						Value:   "./index.mf",
						Aliases: []string{"o"},
						Usage:   "Specify output filename",
					},
				},
			},
		},
	}

	err := app.Run(os.Args)
	if err != nil {
		log.Fatal(err)
		return 1
	}
	return 0
}

func generateManifest(path, outputFilename string) error {
	fmt.Println("generateManifest()")
	walkErr := filepath.Walk(path, func(itemPath string, info os.FileInfo, err error) error {
		fmt.Println(itemPath)
		return nil
	})

	if walkErr != nil {
		log.Fatal(walkErr)
		return walkErr
	}

	return nil
}