132 lines
3.9 KiB
JavaScript
132 lines
3.9 KiB
JavaScript
/**
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* @author Toru Nagashima
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* See LICENSE file in root directory for full license.
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*/
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"use strict"
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const path = require("path")
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const { pathToFileURL, fileURLToPath } = require("url")
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const resolve = require("resolve")
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const {
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defaultResolve: importResolve,
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} = require("../converted-esm/import-meta-resolve")
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/**
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* Resolve the given id to file paths.
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* @param {boolean} isModule The flag which indicates this id is a module.
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* @param {string} id The id to resolve.
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* @param {object} options The options of node-resolve module.
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* It requires `options.basedir`.
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* @param {'import' | 'require'} moduleType - whether the target was require-ed or imported
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* @returns {string|null} The resolved path.
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*/
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function getFilePath(isModule, id, options, moduleType) {
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if (moduleType === "import") {
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const paths =
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options.paths && options.paths.length > 0
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? options.paths.map(p => path.resolve(process.cwd(), p))
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: [options.basedir]
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for (const aPath of paths) {
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try {
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const { url } = importResolve(id, {
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parentURL: pathToFileURL(path.join(aPath, "dummy-file.mjs"))
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.href,
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conditions: ["node", "import", "require"],
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})
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if (url) {
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return fileURLToPath(url)
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}
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} catch (e) {
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continue
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}
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}
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if (isModule) {
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return null
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}
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return path.resolve(
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(options.paths && options.paths[0]) || options.basedir,
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id
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)
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} else {
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try {
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return resolve.sync(id, options)
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} catch (_err) {
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try {
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const { url } = importResolve(id, {
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parentURL: pathToFileURL(
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path.join(options.basedir, "dummy-file.js")
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).href,
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conditions: ["node", "require"],
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})
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return fileURLToPath(url)
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} catch (err) {
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if (isModule) {
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return null
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}
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return path.resolve(options.basedir, id)
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}
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}
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}
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}
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/**
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* Gets the module name of a given path.
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*
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* e.g. `eslint/lib/ast-utils` -> `eslint`
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*
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* @param {string} nameOrPath - A path to get.
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* @returns {string} The module name of the path.
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*/
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function getModuleName(nameOrPath) {
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let end = nameOrPath.indexOf("/")
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if (end !== -1 && nameOrPath[0] === "@") {
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end = nameOrPath.indexOf("/", 1 + end)
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}
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return end === -1 ? nameOrPath : nameOrPath.slice(0, end)
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}
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/**
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* Information of an import target.
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*/
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module.exports = class ImportTarget {
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/**
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* Initialize this instance.
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* @param {ASTNode} node - The node of a `require()` or a module declaraiton.
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* @param {string} name - The name of an import target.
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* @param {object} options - The options of `node-resolve` module.
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* @param {'import' | 'require'} moduleType - whether the target was require-ed or imported
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*/
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constructor(node, name, options, moduleType) {
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const isModule = !/^(?:[./\\]|\w+:)/u.test(name)
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/**
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* The node of a `require()` or a module declaraiton.
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* @type {ASTNode}
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*/
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this.node = node
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/**
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* The name of this import target.
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* @type {string}
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*/
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this.name = name
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/**
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* The full path of this import target.
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* If the target is a module and it does not exist then this is `null`.
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* @type {string|null}
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*/
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this.filePath = getFilePath(isModule, name, options, moduleType)
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/**
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* The module name of this import target.
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* If the target is a relative path then this is `null`.
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* @type {string|null}
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*/
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this.moduleName = isModule ? getModuleName(name) : null
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}
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}
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