65 lines
1.8 KiB
JavaScript
65 lines
1.8 KiB
JavaScript
|
import fs from "fs";
|
||
|
|
import { join } from "path";
|
||
|
|
import { URL, fileURLToPath } from "url";
|
||
|
|
import { minify } from "terser"; // eslint-disable-line import/no-extraneous-dependencies
|
||
|
|
|
||
|
|
const HELPERS_FOLDER = new URL("../src/helpers", import.meta.url);
|
||
|
|
const IGNORED_FILES = new Set(["package.json"]);
|
||
|
|
|
||
|
|
export default async function generateHelpers() {
|
||
|
|
let output = `/*
|
||
|
|
* This file is auto-generated! Do not modify it directly.
|
||
|
|
* To re-generate run 'yarn gulp generate-runtime-helpers'
|
||
|
|
*/
|
||
|
|
|
||
|
|
import template from "@babel/template";
|
||
|
|
|
||
|
|
function helper(minVersion: string, source: string) {
|
||
|
|
return Object.freeze({
|
||
|
|
minVersion,
|
||
|
|
ast: () => template.program.ast(source, { preserveComments: true }),
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
export default Object.freeze({
|
||
|
|
`;
|
||
|
|
|
||
|
|
for (const file of (await fs.promises.readdir(HELPERS_FOLDER)).sort()) {
|
||
|
|
if (IGNORED_FILES.has(file)) continue;
|
||
|
|
if (file.startsWith(".")) continue; // ignore e.g. vim swap files
|
||
|
|
|
||
|
|
const [helperName] = file.split(".");
|
||
|
|
|
||
|
|
const filePath = join(fileURLToPath(HELPERS_FOLDER), file);
|
||
|
|
if (!file.endsWith(".js")) {
|
||
|
|
console.error("ignoring", filePath);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
const fileContents = await fs.promises.readFile(filePath, "utf8");
|
||
|
|
const minVersionMatch = fileContents.match(
|
||
|
|
/^\s*\/\*\s*@minVersion\s+(?<minVersion>\S+)\s*\*\/\s*$/m
|
||
|
|
);
|
||
|
|
if (!minVersionMatch) {
|
||
|
|
throw new Error(`@minVersion number missing in ${filePath}`);
|
||
|
|
}
|
||
|
|
const { minVersion } = minVersionMatch.groups;
|
||
|
|
|
||
|
|
const source = await minify(fileContents, {
|
||
|
|
mangle: false,
|
||
|
|
// The _typeof helper has a custom directive that we must keep
|
||
|
|
compress: { directives: false },
|
||
|
|
});
|
||
|
|
|
||
|
|
output += `\
|
||
|
|
${JSON.stringify(helperName)}: helper(
|
||
|
|
${JSON.stringify(minVersion)},
|
||
|
|
${JSON.stringify(source.code)},
|
||
|
|
),
|
||
|
|
`;
|
||
|
|
}
|
||
|
|
|
||
|
|
output += "});";
|
||
|
|
return output;
|
||
|
|
}
|