67 lines
1.8 KiB
JavaScript
67 lines
1.8 KiB
JavaScript
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'use strict';
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const resolve = require('resolve/sync');
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const isCoreModule = require('is-core-module');
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const path = require('path');
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const log = require('debug')('eslint-plugin-import:resolver:node');
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exports.interfaceVersion = 2;
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exports.resolve = function (source, file, config) {
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log('Resolving:', source, 'from:', file);
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let resolvedPath;
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if (isCoreModule(source)) {
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log('resolved to core');
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return { found: true, path: null };
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}
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try {
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const cachedFilter = function (pkg, dir) { return packageFilter(pkg, dir, config); };
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resolvedPath = resolve(source, opts(file, config, cachedFilter));
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log('Resolved to:', resolvedPath);
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return { found: true, path: resolvedPath };
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} catch (err) {
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log('resolve threw error:', err);
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return { found: false };
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}
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};
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function opts(file, config, packageFilter) {
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return Object.assign({ // more closely matches Node (#333)
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// plus 'mjs' for native modules! (#939)
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extensions: ['.mjs', '.js', '.json', '.node'],
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}, config, {
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// path.resolve will handle paths relative to CWD
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basedir: path.dirname(path.resolve(file)),
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packageFilter,
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});
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}
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function identity(x) { return x; }
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function packageFilter(pkg, dir, config) {
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let found = false;
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const file = path.join(dir, 'dummy.js');
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if (pkg.module) {
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try {
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resolve(String(pkg.module).replace(/^(?:\.\/)?/, './'), opts(file, config, identity));
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pkg.main = pkg.module;
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found = true;
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} catch (err) {
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log('resolve threw error trying to find pkg.module:', err);
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}
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}
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if (!found && pkg['jsnext:main']) {
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try {
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resolve(String(pkg['jsnext:main']).replace(/^(?:\.\/)?/, './'), opts(file, config, identity));
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pkg.main = pkg['jsnext:main'];
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found = true;
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} catch (err) {
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log('resolve threw error trying to find pkg[\'jsnext:main\']:', err);
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}
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}
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return pkg;
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}
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