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index.js
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index.js
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#!/usr/bin/env node
const fs = require('fs');
const path = require('path');
const commander = require('commander');
const mkdirp = require('mkdirp');
const ncp = require('ncp').ncp;
commander
.option('-p, --pattern <regexp>', 'Regexp used to parse the lists on stdin (ex: "^lib\/([^\/]+).*\/([^\/]+)$"')
.option('-d, --dest <string>', 'String that owns pattern matches (ex: /path/to/img/$1/$2')
.option('-t, --timeout <number>', 'Timeout to wait for data until the process exits', 5000)
.parse(process.argv);
/* Main */
if (process.argv.length < 3) {
process.stdout.write('Missing arguments.');
commander.help();
process.exit(1);
}
process.stdin.resume();
process.stdin.setEncoding('utf8');
const timeID = setTimeout(() => {
process.stdout.write('No data received from stdin!');
commander.help();
process.exit(1);
}, commander.timeout);
var dataStdin = '';
process.stdin.on('data', (data) => {
clearTimeout(timeID);
dataStdin += data;
});
process.stdin.on('end', () => {
if (dataStdin === '') {
process.exit(0);
}
const list = dataStdin.split(/\s+/).filter(Boolean);
list.forEach(file => {
const regexp = new RegExp(commander.pattern);
const src = path.resolve(path.join(process.cwd(), file));
const dest = path.resolve(file.replace(regexp, commander.dest));
// create dest dir
mkdirp.sync(path.dirname(dest));
if (src !== dest) {
const stats = fs.statSync(src);
const shortSrc = path.relative(process.cwd(), src);
const shortDest = path.relative(process.cwd(), dest);
if (stats.isFile()) {
// copy file to dest dir
fs.createReadStream(src).pipe(fs.createWriteStream(dest));
process.stdout.write(`✔ ${shortSrc} -> ${shortDest}\n`);
} else if (stats.isDirectory()) {
ncp(src, dest, (err) => {
if (err) {
process.stdout.write(`✗ ${shortSrc}: Error when copying the directory\n`);
} else {
process.stdout.write(`✔ ${shortSrc} -> ${shortDest}\n`);
}
});
}
} else {
process.stdout.write(`✗ ${src}: Source and destination are the same\n`);
}
});
});