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astro/scripts/cmd/prebuild.js
Matthew Phillips fc52321a88
Consolidate hydration scripts into just one (#3571)
* Remove redundant hydration scripts

* Prebuild the island JS

* Fix build

* Updates to tests

* Update more references

* Custom element test now has two classic scripts

* Account for non-default exports

* Restructure hydration directives

* Move nested logic into the island component

* Remove try/catch
2022-06-15 08:50:05 -04:00

52 lines
1.6 KiB
JavaScript

import * as terser from 'terser';
import esbuild from 'esbuild';
import glob from 'tiny-glob';
import fs from 'fs';
import path from 'path';
import { pathToFileURL, fileURLToPath } from 'url';
export default async function prebuild(...args) {
let buildToString = args.indexOf('--to-string');
if(buildToString !== -1) {
args.splice(buildToString, 1);
buildToString = true;
}
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: true
});
const rootURL = new URL('../../', import.meta.url);
const rel = path.relative(fileURLToPath(rootURL), filepath)
const mod = `/**
* This file is prebuilt from ${rel}
* Do not edit this directly, but instead edit that file and rerun the prebuild
* to generate this file.
*/
export default \`${esbuildresult.code.trim()}\`;`;
const url = getPrebuildURL(filepath);
await fs.promises.writeFile(url, mod, 'utf-8');
}
await Promise.all(entryPoints.map(prebuildFile));
}