lbundle/dist/helpers/get-lib-outputs.mjs

Small zero-configuration bundler build on top of Rollup.js and SWC for NPM libraries

import 'rollup';
import { isString, isDefined } from '../utils/checks.mjs';
import { getExportsFilenames } from '../utils/get-exports-filenames.mjs';
import { getFilenameOutputFormat } from '../utils/get-filename-output-format.mjs';
import path from 'path';

const getLibOutputs = (param)=>{
    let { options, globalName, pkg, isModule, cssFilename } = param;
    const map = new Map();
    [
        pkg.main,
        pkg.module,
        pkg.unpkg,
        ...getExportsFilenames(pkg.exports)
    ].filter((filename)=>isString(filename) && jsExtensions[path.extname(filename)]).map((filename)=>{
        const format = getFilenameOutputFormat(filename, isModule);
        const ext = path.extname(filename);
        const preserveModules = preserveModulesFormats[format];
        const entryFileNames = preserveModules ? `[name]${ext}` : undefined;
        const dir = preserveModules ? path.resolve(options.cwd, path.dirname(filename)) : undefined;
        const file = preserveModules ? undefined : path.resolve(options.cwd, filename);
        return {
            name: globalName,
            format,
            file,
            dir,
            entryFileNames,
            preserveModules,
            assetFileNames: (param)=>{
                let { names } = param;
                const normalizedCssFilename = path.posix.normalize(cssFilename);
                if (names.includes(normalizedCssFilename)) {
                    if (isDefined(dir)) return path.relative(dir, path.resolve(options.cwd, normalizedCssFilename));
                    return normalizedCssFilename;
                }
                return 'assets/[name]-[hash][extname]';
            },
            esModule: format === 'cjs',
            strict: true,
            sourcemap: true
        };
    }).forEach((output)=>map.set(output.format, output));
    return [
        ...map.values()
    ];
};
const preserveModulesFormats = {
    'esm': true,
    'cjs': true
};
const jsExtensions = {
    '.js': true,
    '.cjs': true,
    '.mjs': true
};

export { getLibOutputs };
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