quick script to generate files

README.md

• Create file on .templates folder at user home: mkdir ~/.templates/elixir && touch ~/.templates/elixir/module
• Contents:

defmodule {{mod}} do
end

Usage: bob -tpl elixir/module -d ./person.ex -v mod=Person

Templates are based on handlebars rendered by aymerick/raymond

bob.go

package main

import (
	"flag"
	"fmt"
	"github.com/aymerick/raymond"
	"io/ioutil"
	"os"
	"os/user"
	"path"
	"strings"
)

func main() {
	// bob elixir/supervisor ./sample_file.ex -module SomeModule
	tpl := flag.String("tpl", "", "Template file based on '~/.templates'")
	dest := flag.String("d", "./file", "Destination File")
	vars := flag.String("v", "", "Variables to pass to template as: some=var another=var")
	flag.Parse()
	// load template file
	path := path.Join(templateFolder(), *tpl)
	data, err := ioutil.ReadFile(path)
	if err != nil {
		fmt.Printf("Error ocurred: %v", err)
		os.Exit(1)
	}
	ctx := make(map[string]string)
	
	for _, pair := range strings.Split(*vars, " ") {
		fmt.Println(pair)
		keyVal := strings.Split(pair, "=")
		
		if len(keyVal) != 2 {
			fmt.Println("Can not form arguments for the template, use: my_template_var=MyValue")
			os.Exit(1)
		}
		ctx[keyVal[0]] = keyVal[1]
	}
	res, err := raymond.Render(string(data), ctx)
	if err != nil {
		fmt.Printf("Can not render template, verify and try again, error: %v", err)
		os.Exit(1)
	}
	err = ioutil.WriteFile(*dest, []byte(res), 0777)
	if err != nil {
		fmt.Printf("Could not write file, %v", err)
	}
}

func templateFolder() string {
	usr, _ := user.Current()
	dir := usr.HomeDir
	return path.Join(dir, ".templates")
}