tshy/dist/esm/polyfills.js

TypeScript HYbridizer - Hybrid (CommonJS/ESM) TypeScript node package builder

// the modules like -cjs.cts that override a module at .ts
import chalk from 'chalk';
import config from './config.js';
import * as console from './console.js';
import sources from './sources.js';
const { esmDialects = [], commonjsDialects = [] } = config;
export class PolyfillSet {
    type;
    name;
    map = new Map();
    rmap = new Map();
    constructor(type, name) {
        this.type = type;
        this.name = name;
    }
    addFile(f, sources) {
        const dotts = this.type === 'commonjs' ? 'cts' : 'mts';
        let ending = `-${this.name}.${dotts}`;
        // custom dialects can override both types with a -name.ts file.
        if (!f.endsWith(ending) &&
            this.name !== 'cjs' &&
            this.name !== 'esm') {
            ending = `-${this.name}.ts`;
        }
        if (!f.endsWith(ending)) {
            return;
        }
        const ts = f.substring(0, f.length - ending.length) + '.ts';
        const tsx = ts + 'x';
        const src = sources.has(ts) ? ts
            : sources.has(tsx) ? tsx
                : undefined;
        if (!src) {
            return;
        }
        this.map.set(f, src);
        this.rmap.set(src, f);
    }
    [Symbol.for('nodejs.util.inspect.custom')]() {
        return [this.name, this.type, this.map];
    }
}
const polyfills = new Map([
    ['cjs', new PolyfillSet('commonjs', 'cjs')],
    ['esm', new PolyfillSet('esm', 'esm')],
]);
for (const d of commonjsDialects)
    polyfills.set('commonjs-' + d, new PolyfillSet('commonjs', d));
for (const d of esmDialects)
    polyfills.set('esm-' + d, new PolyfillSet('esm', d));
for (const f of sources) {
    for (const pf of polyfills.values()) {
        pf.addFile(f, sources);
    }
}
// delete any polyfill types that have no entries
for (const [name, pf] of polyfills.entries()) {
    if (pf.map.size === 0)
        polyfills.delete(name);
}
if (polyfills.size) {
    console.debug(chalk.cyan.dim('polyfills detected'), polyfills);
}
export default polyfills;
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