/
loadConfigFile.ts
154 lines (148 loc) · 4.75 KB
/
loadConfigFile.ts
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import { promises as fs } from 'node:fs';
import { dirname, isAbsolute, join } from 'node:path';
import process from 'node:process';
import { pathToFileURL } from 'node:url';
import * as rollup from '../../src/node-entry';
import type { MergedRollupOptions } from '../../src/rollup/types';
import { bold } from '../../src/utils/colors';
import {
errCannotBundleConfigAsEsm,
errCannotLoadConfigAsCjs,
errCannotLoadConfigAsEsm,
errMissingConfig,
error
} from '../../src/utils/error';
import { mergeOptions } from '../../src/utils/options/mergeOptions';
import type { GenericConfigObject } from '../../src/utils/options/options';
import relativeId from '../../src/utils/relativeId';
import { stderr } from '../logging';
import batchWarnings, { type BatchWarnings } from './batchWarnings';
import { addCommandPluginsToInputOptions, addPluginsFromCommandOption } from './commandPlugins';
export async function loadConfigFile(
fileName: string,
commandOptions: any = {}
): Promise<{ options: MergedRollupOptions[]; warnings: BatchWarnings }> {
const configs = await getConfigList(
getDefaultFromCjs(await getConfigFileExport(fileName, commandOptions)),
commandOptions
);
const warnings = batchWarnings();
try {
const normalizedConfigs: MergedRollupOptions[] = [];
for (const config of configs) {
const options = mergeOptions(config, commandOptions, warnings.add);
await addCommandPluginsToInputOptions(options, commandOptions);
normalizedConfigs.push(options);
}
return { options: normalizedConfigs, warnings };
} catch (err) {
warnings.flush();
throw err;
}
}
async function getConfigFileExport(fileName: string, commandOptions: Record<string, unknown>) {
if (commandOptions.configPlugin || commandOptions.bundleConfigAsCjs) {
try {
return await loadTranspiledConfigFile(fileName, commandOptions);
} catch (err: any) {
if (err.message.includes('not defined in ES module scope')) {
return error(errCannotBundleConfigAsEsm(err));
}
throw err;
}
}
let cannotLoadEsm = false;
const handleWarning = (warning: Error): void => {
if (warning.message.includes('To load an ES module')) {
cannotLoadEsm = true;
}
};
process.on('warning', handleWarning);
try {
const fileUrl = pathToFileURL(fileName);
if (process.env.ROLLUP_WATCH) {
// We are adding the current date to allow reloads in watch mode
fileUrl.search = `?${Date.now()}`;
// TODO Lukas remove
console.error('detected watch, using extension', fileUrl.href);
}
return (await import(fileUrl.href)).default;
} catch (err: any) {
if (cannotLoadEsm) {
return error(errCannotLoadConfigAsCjs(err));
}
if (err.message.includes('not defined in ES module scope')) {
return error(errCannotLoadConfigAsEsm(err));
}
throw err;
} finally {
process.off('warning', handleWarning);
}
}
function getDefaultFromCjs(namespace: GenericConfigObject): unknown {
return namespace.default || namespace;
}
async function loadTranspiledConfigFile(
fileName: string,
{ bundleConfigAsCjs, configPlugin, silent }: Record<string, unknown>
): Promise<unknown> {
const warnings = batchWarnings();
const inputOptions = {
external: (id: string) =>
(id[0] !== '.' && !isAbsolute(id)) || id.slice(-5, id.length) === '.json',
input: fileName,
onwarn: warnings.add,
plugins: [],
treeshake: false
};
await addPluginsFromCommandOption(configPlugin, inputOptions);
const bundle = await rollup.rollup(inputOptions);
if (!silent && warnings.count > 0) {
stderr(bold(`loaded ${relativeId(fileName)} with warnings`));
warnings.flush();
}
const {
output: [{ code }]
} = await bundle.generate({
exports: 'named',
format: bundleConfigAsCjs ? 'cjs' : 'es',
plugins: [
{
name: 'transpile-import-meta',
resolveImportMeta(property, { moduleId }) {
if (property === 'url') {
return `'${pathToFileURL(moduleId).href}'`;
}
if (property == null) {
return `{url:'${pathToFileURL(moduleId).href}'}`;
}
}
}
]
});
return loadConfigFromWrittenFile(
join(dirname(fileName), `rollup.config-${Date.now()}.${bundleConfigAsCjs ? 'cjs' : 'mjs'}`),
code
);
}
async function loadConfigFromWrittenFile(
bundledFileName: string,
bundledCode: string
): Promise<unknown> {
await fs.writeFile(bundledFileName, bundledCode);
try {
return (await import(pathToFileURL(bundledFileName).href)).default;
} finally {
// Not awaiting here saves some ms while potentially hiding a non-critical error
fs.unlink(bundledFileName);
}
}
async function getConfigList(configFileExport: any, commandOptions: any): Promise<any[]> {
const config = await (typeof configFileExport === 'function'
? configFileExport(commandOptions)
: configFileExport);
if (Object.keys(config).length === 0) {
return error(errMissingConfig());
}
return Array.isArray(config) ? config : [config];
}