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import fs from "node:fs/promises";
import path from "node:path";
import swc from "@swc/core";
import processForDist from "./dist.js";
import getTimestamp from "./lib/getTimestamp.js";
const rjs = /\.js$/;
export default async function minify( { filename, dir, esm } ) {
const contents = await fs.readFile( path.join( dir, filename ), "utf8" );
const version = /jQuery JavaScript Library ([^\n]+)/.exec( contents )[ 1 ];
const { code, map: incompleteMap } = await swc.minify(
contents,
{
compress: {
ecma: esm ? 2015 : 5,
hoist_funs: false,
loops: false
},
format: {
ecma: esm ? 2015 : 5,
asciiOnly: true,
comments: false,
preamble: `/*! jQuery ${ version }` +
" | (c) OpenJS Foundation and other contributors" +
" | jquery.org/license */\n"
},
inlineSourcesContent: false,
mangle: true,
module: esm,
sourceMap: true
}
);
const minFilename = filename.replace( rjs, ".min.js" );
const mapFilename = filename.replace( rjs, ".min.map" );
// The map's `files` & `sources` property are set incorrectly, fix
// them via overrides from the task config.
// See https://github.com/swc-project/swc/issues/7588#issuecomment-1624345254
const map = JSON.stringify( {
...JSON.parse( incompleteMap ),
file: minFilename,
sources: [ filename ]
} );
await Promise.all( [
fs.writeFile(
path.join( dir, minFilename ),
code
),
fs.writeFile(
path.join( dir, mapFilename ),
map
)
] );
// Always process files for dist
// Doing it here avoids extra file reads
processForDist( contents, filename );
processForDist( code, minFilename );
processForDist( map, mapFilename );
console.log( `[${ getTimestamp() }] ${ minFilename } ${ version } with ${
mapFilename
} created.` );
}
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