89 lines
2.1 KiB
JavaScript
89 lines
2.1 KiB
JavaScript
const {join} = require('path');
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const {CachedInputFileSystem, ResolverFactory} = require('enhanced-resolve');
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const AppendPlugin = require('enhanced-resolve/lib/AppendPlugin');
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const AliasPlugin = require('enhanced-resolve/lib/AliasPlugin');
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const fs = require('graceful-fs');
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const D = require('./debug');
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const debug = D('@flecks/core/build/resolver');
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const debugSilly = debug.extend('silly');
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const {
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FLECKS_CORE_ROOT = process.cwd(),
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} = process.env;
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const nodeContext = {
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environments: ['node+es3+es5+process+native'],
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};
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const nodeFileSystem = new CachedInputFileSystem(fs, 4000);
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module.exports = class Resolver {
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constructor(options) {
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this.resolver = ResolverFactory.createResolver({
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conditionNames: ['node'],
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extensions: ['.js', '.json', '.node'],
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fileSystem: nodeFileSystem,
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symlinks: false,
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...{
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modules: [join(FLECKS_CORE_ROOT, 'node_modules')],
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...options,
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},
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});
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}
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addAlias(name, alias) {
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debugSilly("adding alias: '%s' -> '%s'", name, alias);
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new AliasPlugin(
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'raw-resolve',
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{name, onlyModule: false, alias},
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'internal-resolve',
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).apply(this.resolver);
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}
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addExtensions(extensions) {
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debugSilly("adding extensions: '%O'", extensions);
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extensions.forEach((extension) => {
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new AppendPlugin('raw-file', extension, 'file').apply(this);
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});
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}
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addFallback(name, alias) {
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debugSilly("adding fallback: '%s' -> '%s'", name, alias);
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new AliasPlugin(
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'described-resolve',
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{name, onlyModule: false, alias},
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'internal-resolve',
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).apply(this.resolver);
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}
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static isResolutionError(error) {
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return error.message.startsWith("Can't resolve");
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}
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async resolve(request) {
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try {
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return await new Promise((resolve, reject) => {
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this.resolver.resolve(nodeContext, FLECKS_CORE_ROOT, request, {}, (error, path) => {
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if (error) {
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reject(error);
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}
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else {
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resolve(path);
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}
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});
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});
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}
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catch (error) {
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if (!this.constructor.isResolutionError(error)) {
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throw error;
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}
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return undefined;
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}
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}
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};
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