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Copy pathpreprocess-svg.js
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73 lines (60 loc) · 2.09 KB
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const util = require('util');
const fs = require('fs');
const path = require('path');
const minimist = require('minimist');
const svgLoader = require('svg-inline-loader');
const globCb = require('glob');
const mkdirpCb = require('mkdirp');
function printUsage(consoleFn, exitCode) {
consoleFn(`Usage: bin/preprocess-svg --in [filename] --out [filename]
Preprocess a directory containing *.svg files into *.js modules consistently
with the way that Webpack will transpile them at build time.
Options:
--help, -h Display this message.
--in, -i [dirname] Discover and convert SVG files beneath [dirname].
--out, -o [dirname] Emit JavaScript source to files beneath [dirname].
`);
process.exit(exitCode);
}
const argv = minimist(process.argv.slice(2), {
string: ['in', 'out'],
boolean: ['help'],
alias: { h: 'help', i: 'in', o: 'out' },
unknown: param => {
console.error(`Unrecognized command-line argument: ${param}\n`);
printUsage(console.error, 1);
},
});
if (argv.help) {
printUsage(console.log, 0);
}
const inRoot = argv.in;
const outRoot = argv.out;
if (!inRoot || !outRoot) {
console.error('Both --in and --out parameters are required.\n');
printUsage(console.error, 1);
}
const readFile = util.promisify(fs.readFile);
const writeFile = util.promisify(fs.writeFile);
async function processFile(inFilename, outFilename) {
const originalSource = await readFile(inFilename, { encoding: 'utf8' });
const moduleSource = svgLoader(originalSource);
await writeFile(outFilename, moduleSource, { encoding: 'utf8' });
}
const glob = util.promisify(globCb);
const mkdirp = util.promisify(mkdirpCb);
async function processDirectory(inDirectory, outDirectory) {
const files = await glob('**/*.svg', { cwd: inDirectory });
return Promise.all(
files.map(async subPath => {
const inFilename = path.join(__dirname, inDirectory, subPath);
const outFilename = path.join(__dirname, outDirectory, subPath);
await mkdirp(path.dirname(outFilename));
await processFile(inFilename, outFilename);
}),
);
}
processDirectory(inRoot, outRoot).catch(error => {
console.error(error.stack);
process.exit(1);
});