create .md file, post to jekyll with metadata template in terminal

post.js

#!/usr/bin/env node
var __config = { /* author: deptno@gmail.com */
    path_root: '/Users/deptno/Workspace/github/deptno.github.io',
    path_post: '_posts',
    cmd_editor: 'mvim',
    ext: '.md'
};

if (process.argv.length < 3) {
    console.log(' * configure: $ ' + __config.cmd_editor + ' ' + process.argv[1]);
    console.log('              modify __config variable');
    console.log(' * usage: "post [posting type] [post-name]"');
    console.log(' * example: "post blog new-article-example"');
    process.exit(0);
}
var path = require('path');
var fs = require('fs');
var childProcess = require('child_process');
var type = process.argv[2];
var folder = type === 'article' ? 'article' : 'blog';
var title = process.argv[3];
var date =  new Date().toISOString();
var pathWorking = path.join(__config.path_root, __config.path_post, folder);
var rxpFilter = /([0-9]+-[0-9]+-[0-9]+)-(.*)/;
var files = [];
var keywords = {
    ls: function() {
        process.chdir(pathWorking);
        console.log(childProcess.execSync('ls').toString());
    },
    rm: function(files) {
        try {
            childProcess.execSync('rm ' + files.map(function(file) {
                return path.join(pathWorking, '*' + file + __config.ext);
            }));
            this.ls();
        } catch(ex) { ; }
    }
};
__config.path_post = path.join(__config.path_post, folder);
if (!fs.existsSync(path.join(__config.path_root, __config.path_post))) {
	console.info(path.join(__config.path_root, __config.path_post) + ' does not found');
	process.exit(1);
}
if (keywords[title]) {
    keywords[title](process.argv.slice(4));
    process.exit(0);
}
try {
    var result;
    files = childProcess
        .execSync('ls ' + path.join(pathWorking, '*' + title + __config.ext))
        .toString()
        .split('\n')
        .filter(function(fileName) {
            result = rxpFilter.exec(path.basename(fileName));
            return result && result.length === 3;
        });
} catch(ex) { ; }
var filename;
var content;
if (files.length >= 1) {
    filename = files[0];
    console.log('= modify, filename: ' + filename);
    content = fs.readFileSync(filename).toString().replace(/modified:.*/, 'modified: ' + date);
} else {
    filename = path.join(pathWorking, date.substring(0, 10) + '-' + title + __config.ext);
    console.log('= create, filename: ' + filename);
    content = [
        '---',
        'layout: post',
        'title: ' + title,
        'modified:',
        'categories: ' + type,
        'excerpt:',
        'tags: []',
        'images:',
        'feature:',
        'date: ' + date,
        '---'
    ].join(require('os').EOL);
}
fs.writeFileSync(filename, content);
childProcess.spawn(__config.cmd_editor, [filename], {
    stdio: 'inherit'
}).on('exit', function(e, code) {
	process.chdir(__config.path_root);
	console.info(childProcess.execSync('git add ' + path.join(__config.path_post, path.basename(filename))).toString());
    process.exit(0);
});;