migrate

#!/usr/bin/env node

var path = require('path');
var fs = require('fs');
var program = require('commander');

var MIGRATIONS_DIR = './imports/migrations';
var MIGRATIONS_EXT = 'ts';

function main() {
    parseArgs();
    program.parse(process.argv);
}

function parseArgs() {
    program
        .command('generate <migrationName> [moreMigrations...]')
        .alias('g')
        .action(onCreateMigration)
}

function onCreateMigration(migrationName, moreMigrations) {
    var timestamp = Date.now();
    var filename = timestamp + "_" + migrationName + "." + MIGRATIONS_EXT;
    var migrationPath = path.join(MIGRATIONS_DIR, filename);

    console.log('Create migration %s', path.join(process.cwd(), migrationPath));
    
    try {
        fs.mkdirSync(MIGRATIONS_DIR);
    } catch (e) {
        // ignore existing directory error
        if (e.code !== 'EEXIST') {
            throw e;
        }
    }

    fs.writeFileSync(migrationPath, getMigrationTemplate(migrationName, timestamp));

    if (moreMigrations && moreMigrations.length) {
        moreMigrations.forEach(onCreateMigration);
    }
}

function getMigrationTemplate(name, version) {
    return [
        "import { Migration } from '../packages/meteor-seed-migrate/index.js';",
        "",
        "export default class " + captalize(name) + " extends Migration {",
        "   version = " + version + ";",
        "   up() {",
        "       ",
        "   }",
        "   down() {",
        "       ",
        "   }",
        "}"
    ].join('\n');
}


function captalize(name) {
    return name.charAt(0).toUpperCase() + name.slice(1);
}

main();