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run 1 compilation for multiple entries
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@wardpeet
wardpeet committed Sep 2, 2020
1 parent 6fb7987 commit c1cc357
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Showing 3 changed files with 210 additions and 217 deletions.
129 changes: 61 additions & 68 deletions src/index.js
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Expand Up @@ -79,24 +79,13 @@ export default async function microbundle(inputOptions) {
input: options.input,
});

options.multipleEntries = options.entries.length > 1;

let formats = (options.format || options.formats).split(',');
// always compile cjs first if it's there:
formats.sort((a, b) => (a === 'cjs' ? -1 : a > b ? 1 : 0));

let steps = [];
for (let i = 0; i < options.entries.length; i++) {
for (let j = 0; j < formats.length; j++) {
steps.push(
createConfig(
options,
options.entries[i],
formats[j],
i === 0 && j === 0,
),
);
}
for (let j = 0; j < formats.length; j++) {
steps.push(createConfig(options, options.entries, formats[j], j === 0));
}

if (options.watch) {
Expand All @@ -110,6 +99,7 @@ export default async function microbundle(inputOptions) {
if (inputOptions.cache !== false) {
inputOptions.cache = cache;
}

let bundle = await rollup(inputOptions);
cache = bundle;
await bundle.write(outputOptions);
Expand Down Expand Up @@ -203,6 +193,7 @@ async function getInput({ entries, cwd, source, module }) {

async function getOutput({ cwd, output, pkgMain, pkgName }) {
let main = resolve(cwd, output || pkgMain || 'dist');

if (!main.match(/\.[a-z]+$/) || (await isDir(main))) {
main = resolve(main, `${removeScope(pkgName)}.js`);
}
Expand Down Expand Up @@ -244,64 +235,72 @@ function replaceName(filename, name) {
);
}

function getMain({ options, entry, format }) {
function getMain({ options, entries, format }) {
const { pkg } = options;
const pkgMain = options['pkg-main'];

if (!pkgMain) {
return options.output;
}
const inputs = {};
entries.forEach(entry => {
let mainNoExtension = options.output;

if (!pkgMain) {
inputs[basename(mainNoExtension, extname(mainNoExtension))] = entry;
return;
}

let name;
// when we have multiple entries we look for the index file and mark that as our main entry
if (entries.length > 1) {
name = entry.match(/([\\/])index(\.(umd|cjs|es|m))?\.(mjs|[tj]sx?)$/)
? mainNoExtension
: entry;
} else {
name = mainNoExtension;
}

let mainNoExtension = options.output;
if (options.multipleEntries) {
let name = entry.match(/([\\/])index(\.(umd|cjs|es|m))?\.(mjs|[tj]sx?)$/)
? mainNoExtension
: entry;
mainNoExtension = resolve(dirname(mainNoExtension), basename(name));
}
mainNoExtension = mainNoExtension.replace(
/(\.(umd|cjs|es|m))?\.(mjs|[tj]sx?)$/,
'',
);

const mainsByFormat = {};
mainNoExtension = mainNoExtension.replace(
/(\.(umd|cjs|es|m))?\.(mjs|[tj]sx?)$/,
'',
);

mainsByFormat.es = replaceName(
pkg.module && !pkg.module.match(/src\//)
? pkg.module
: pkg['jsnext:main'] || 'x.esm.js',
mainNoExtension,
);
mainsByFormat.modern = replaceName(
(pkg.syntax && pkg.syntax.esmodules) || pkg.esmodule || 'x.modern.js',
mainNoExtension,
);
mainsByFormat.cjs = replaceName(pkg['cjs:main'] || 'x.js', mainNoExtension);
mainsByFormat.umd = replaceName(
pkg['umd:main'] || pkg.unpkg || 'x.umd.js',
mainNoExtension,
);
const mainsByFormat = {};

return mainsByFormat[format] || mainsByFormat.cjs;
mainsByFormat.es = replaceName(
pkg.module && !pkg.module.match(/src\//)
? pkg.module
: pkg['jsnext:main'] || 'x.esm.js',
mainNoExtension,
);
mainsByFormat.modern = replaceName(
(pkg.syntax && pkg.syntax.esmodules) || pkg.esmodule || 'x.modern.js',
mainNoExtension,
);
mainsByFormat.cjs = replaceName(pkg['cjs:main'] || 'x.js', mainNoExtension);
mainsByFormat.umd = replaceName(
pkg['umd:main'] || pkg.unpkg || 'x.umd.js',
mainNoExtension,
);

const file = mainsByFormat[format] || mainsByFormat.cjs;
inputs[basename(file, extname(file))] = entry;
});

return inputs;
}

// shebang cache map because the transform only gets run once
const shebang = {};

function createConfig(options, entry, format, writeMeta) {
function createConfig(options, entries, format, writeMeta) {
let { pkg } = options;

/** @type {(string|RegExp)[]} */
let external = ['dns', 'fs', 'path', 'url'].concat(
options.entries.filter(e => e !== entry),
);
let external = ['dns', 'fs', 'path', 'url'];

/** @type {Record<string, string>} */
let outputAliases = {};
// since we transform src/index.js, we need to rename imports for it:
if (options.multipleEntries) {
outputAliases['.'] = './' + basename(options.output);
}

const moduleAliases = options.alias ? parseAliasArgument(options.alias) : [];
const aliasIds = moduleAliases.map(alias => alias.find);
Expand Down Expand Up @@ -362,7 +361,9 @@ function createConfig(options, entry, format, writeMeta) {
? () => resolve(options.cwd, rawMinifyValue)
: () => resolve(options.cwd, 'mangle.json');

const useTypescript = extname(entry) === '.ts' || extname(entry) === '.tsx';
const useTypescript = entries.some(
entry => extname(entry) === '.ts' || extname(entry) === '.tsx',
);

const escapeStringExternals = ext =>
ext instanceof RegExp ? ext.source : escapeStringRegexp(ext);
Expand Down Expand Up @@ -395,24 +396,20 @@ function createConfig(options, entry, format, writeMeta) {
let cache;
if (modern) cache = false;

const absMain = resolve(options.cwd, getMain({ options, entry, format }));
const outputDir = dirname(absMain);
const outputEntryFileName = basename(absMain);
const inputs = getMain({ options, entries, format });
const outputDir = dirname(options.output);

let config = {
/** @type {import('rollup').InputOptions} */
inputOptions: {
// disable Rollup's cache for the modern build to prevent re-use of legacy transpiled modules:
cache,

input: entry,
input: inputs,
preserveEntrySignatures: 'allow-extension',
external: id => {
if (id === 'babel-plugin-transform-async-to-promises/helpers') {
return false;
}
if (options.multipleEntries && id === '.') {
return true;
}
if (aliasIds.indexOf(id) >= 0) {
return false;
}
Expand All @@ -430,11 +427,7 @@ function createConfig(options, entry, format, writeMeta) {
// only write out CSS for the first bundle (avoids pointless extra files):
inject: false,
extract: !!writeMeta,
minimize: options.compress
? {
preset: 'default',
}
: false,
minimize: options.compress,
}),
moduleAliases.length > 0 &&
alias({
Expand Down Expand Up @@ -481,7 +474,7 @@ function createConfig(options, entry, format, writeMeta) {
? undefined
: options.jsx || 'h',
},
files: options.entries,
files: entries,
},
tsconfig: options.tsconfig,
tsconfigOverride: {
Expand Down Expand Up @@ -590,7 +583,7 @@ function createConfig(options, entry, format, writeMeta) {
name: options.name && options.name.replace(/^global\./, ''),
extend: /^global\./.test(options.name),
dir: outputDir,
entryFileNames: outputEntryFileName,
exports: 'auto',
},
};

Expand Down

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