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import esbuild from 'esbuild';
import glob from 'tiny-glob';
import fs from 'fs';
import path from 'path';
import { pathToFileURL, fileURLToPath } from 'url';
function escapeTemplateLiterals(str) {
return str.replace(/\`/g, '\\`').replace(/\$\{/g, '\\${');
}
export default async function prebuild(...args) {
let buildToString = args.indexOf('--to-string');
if (buildToString !== -1) {
args.splice(buildToString, 1);
buildToString = true;
}
let minify = true;
let minifyIdx = args.indexOf('--no-minify');
if (minifyIdx !== -1) {
minify = false;
args.splice(minifyIdx, 1);
}
let patterns = args;
let entryPoints = [].concat(
...(await Promise.all(
patterns.map((pattern) => glob(pattern, { filesOnly: true, absolute: true }))
))
);
function getPrebuildURL(entryfilepath) {
const entryURL = pathToFileURL(entryfilepath);
const basename = path.basename(entryfilepath);
const ext = path.extname(entryfilepath);
const name = basename.slice(0, basename.indexOf(ext));
const outname = `${name}.prebuilt${ext}`;
const outURL = new URL('./' + outname, entryURL);
return outURL;
}
async function prebuildFile(filepath) {
const tscode = await fs.promises.readFile(filepath, 'utf-8');
const esbuildresult = await esbuild.transform(tscode, {
loader: 'ts',
minify,
});
const rootURL = new URL('../../', import.meta.url);
const rel = path.relative(fileURLToPath(rootURL), filepath);
const mod = `/**
* This file is prebuilt from ${rel}
* Do not edit this directly, but instead edit that file and rerun the prebuild
* to generate this file.
*/
export default \`${escapeTemplateLiterals(esbuildresult.code.trim())}\`;`;
const url = getPrebuildURL(filepath);
await fs.promises.writeFile(url, mod, 'utf-8');
}
await Promise.all(entryPoints.map(prebuildFile));
}
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