35 lines
1.1 KiB
JavaScript
35 lines
1.1 KiB
JavaScript
import Module from "module";
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import path from "path";
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let relativeModules = {};
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export default function (loc: string, relative: string = process.cwd()): ?string {
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// we're in the browser, probably
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if (typeof Module === "object") return null;
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let relativeMod = relativeModules[relative];
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if (!relativeMod) {
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relativeMod = new Module;
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// We need to define an id and filename on our "fake" relative` module so that
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// Node knows what "." means in the case of us trying to resolve a plugin
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// such as "./myPlugins/somePlugin.js". If we don't specify id and filename here,
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// Node presumes "." is process.cwd(), not our relative path.
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// Since this fake module is never "loaded", we don't have to worry about mutating
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// any global Node module cache state here.
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let filename = path.join(relative, ".babelrc");
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relativeMod.id = filename;
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relativeMod.filename = filename;
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relativeMod.paths = Module._nodeModulePaths(relative);
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relativeModules[relative] = relativeMod;
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}
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try {
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return Module._resolveFilename(loc, relativeMod);
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} catch (err) {
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return null;
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}
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}
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