76 lines
2.2 KiB
JavaScript
76 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 { getStringIfConstant } = require("eslint-utils")
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const resolve = require("resolve")
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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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* Checks whether or not a given node is a callee.
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*
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* @param {ASTNode} node - A node to check.
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* @returns {boolean} `true` if the node is a callee.
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*/
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function isCallee(node) {
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return node.parent.type === "CallExpression" && node.parent.callee === node
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}
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/**
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* Gets references of "require".
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*
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* @param {escope.Scope} scope - The global scope.
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* @returns {escope.Reference[]} References of "require".
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*/
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function getReferencesOfRequire(scope) {
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const variable = scope.set.get("require")
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if (!variable) {
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// Not found.
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return []
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}
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return variable.references
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}
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/**
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* Gets a list of `require()` 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 {boolean} includeCore - The flag to include core modules.
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* @returns {ImportTarget[]} A list of found target's information.
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*/
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module.exports = function getRequireTargets(context, includeCore) {
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const retv = []
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const basedir = path.dirname(path.resolve(context.getFilename()))
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const paths = getResolvePaths(context)
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const references = getReferencesOfRequire(context.getScope())
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const extensions = getTryExtensions(context)
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const options = { basedir, paths, extensions }
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for (const reference of references) {
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const node = reference.identifier
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// Skips if it's not a call of `require`.
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if (!isCallee(node)) {
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continue
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}
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// Gets the target module.
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const targetNode = node.parent.arguments[0]
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const rawName = getStringIfConstant(targetNode)
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const name = rawName && stripImportPathParams(rawName)
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if (name && (includeCore || !resolve.isCore(name))) {
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retv.push(new ImportTarget(targetNode, name, options))
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}
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}
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return retv
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}
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