69 lines
2.2 KiB
JavaScript
69 lines
2.2 KiB
JavaScript
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/**
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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 isCoreModule = require("is-core-module")
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const getResolvePaths = require("./get-resolve-paths")
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const getTryExtensions = require("./get-try-extensions")
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const ImportTarget = require("./import-target")
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const stripImportPathParams = require("./strip-import-path-params")
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/**
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* Gets a list of `import`/`export` declaration targets.
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*
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* Core modules of Node.js (e.g. `fs`, `http`) are excluded.
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*
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* @param {RuleContext} context - The rule context.
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* @param {Object} [options] - The flag to include core modules.
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* @param {boolean} [options.includeCore] - The flag to include core modules.
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* @param {number} [options.optionIndex] - The index of rule options.
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* @param {function(ImportTarget[]):void} callback The callback function to get result.
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* @returns {ImportTarget[]} A list of found target's information.
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*/
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module.exports = function visitImport(
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context,
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{ includeCore = false, optionIndex = 0 } = {},
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callback
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) {
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const targets = []
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const basedir = path.dirname(path.resolve(context.getFilename()))
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const paths = getResolvePaths(context, optionIndex)
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const extensions = getTryExtensions(context, optionIndex)
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const options = { basedir, paths, extensions }
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return {
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[[
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"ExportAllDeclaration",
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"ExportNamedDeclaration",
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"ImportDeclaration",
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"ImportExpression",
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]](node) {
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const sourceNode = node.source
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// skip `import(foo)`
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if (
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node.type === "ImportExpression" &&
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sourceNode &&
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sourceNode.type !== "Literal"
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) {
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return
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}
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const name = sourceNode && stripImportPathParams(sourceNode.value)
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// Note: "999" arbitrary to check current/future Node.js version
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if (name && (includeCore || !isCoreModule(name, "999"))) {
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targets.push(
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new ImportTarget(sourceNode, name, options, "import")
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)
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}
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},
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"Program:exit"() {
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callback(targets)
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},
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}
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}
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