Constnium/node_modules/eslint-plugin-n/lib/util/visit-import.js
2022-06-23 02:27:43 +02:00

68 lines
2.2 KiB
JavaScript

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