43 lines
1.4 KiB
JavaScript
43 lines
1.4 KiB
JavaScript
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/**
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* Utility for resolving a module relative to another module
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* @author Teddy Katz
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*/
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import Module from "module";
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/*
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* `Module.createRequire` is added in v12.2.0. It supports URL as well.
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* We only support the case where the argument is a filepath, not a URL.
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*/
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const createRequire = Module.createRequire;
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/**
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* Resolves a Node module relative to another module
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* @param {string} moduleName The name of a Node module, or a path to a Node module.
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* @param {string} relativeToPath An absolute path indicating the module that `moduleName` should be resolved relative to. This must be
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* a file rather than a directory, but the file need not actually exist.
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* @returns {string} The absolute path that would result from calling `require.resolve(moduleName)` in a file located at `relativeToPath`
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*/
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function resolve(moduleName, relativeToPath) {
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try {
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return createRequire(relativeToPath).resolve(moduleName);
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} catch (error) {
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// This `if` block is for older Node.js than 12.0.0. We can remove this block in the future.
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if (
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typeof error === "object" &&
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error !== null &&
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error.code === "MODULE_NOT_FOUND" &&
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!error.requireStack &&
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error.message.includes(moduleName)
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) {
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error.message += `\nRequire stack:\n- ${relativeToPath}`;
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}
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throw error;
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}
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}
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export {
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resolve
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};
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