main.go

package main

import (
	"fmt"
	"os"

	"github.com/spf13/cobra"
)

var (
	// Version represents the version.
	Version = "dev"
	// Revision set "git rev-parse --short HEAD".
	Revision = "HEAD"
)

var only bool

func main() {
	if err := rootCmd.Execute(); err != nil {
		os.Exit(1)
	}
}

// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
	Use:     "mdviewer fileName.md",
	Short:   "markdown viewer",
	Version: fmt.Sprintf("%s (rev: %s)", Version, Revision),
	Long: `markdown viewer.
Render and display markdown on the terminal`,
	Args: cobra.MinimumNArgs(1),
	Run: func(cmd *cobra.Command, args []string) {
		if len(args) == 0 {
			cmd.Help()
			return
		}

		mdViewer, err := MDViewer(only, args)
		if err != nil {
			fmt.Fprintln(os.Stderr, err)
			os.Exit(1)
		}

		if err = mdViewer.Run(); err != nil {
			fmt.Fprintln(os.Stderr, err)
			os.Exit(1)
		}
	},
}

// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
	cobra.CheckErr(rootCmd.Execute())
}

func init() {
	cobra.OnInitialize()
	rootCmd.PersistentFlags().BoolVarP(&only, "only", "o", false, "markdown render only")
}