no-hide-core-modules.js

/**
 * @author Toru Nagashima
 * See LICENSE file in root directory for full license.
 *
 * @deprecated since v4.2.0
 * This rule was based on an invalid assumption.
 * No meaning.
 */
"use strict"

const path = require("path")
const resolve = require("resolve")
const getPackageJson = require("../util/get-package-json")
const getRequireTargets = require("../util/get-require-targets")
const getImportExportTargets = require("../util/get-import-export-targets")

const CORE_MODULES = new Set([
    "assert",
    "buffer",
    "child_process",
    "cluster",
    "console",
    "constants",
    "crypto",
    "dgram",
    "dns",
    /* "domain", */ "events",
    "fs",
    "http",
    "https",
    "module",
    "net",
    "os",
    "path",
    /* "punycode", */ "querystring",
    "readline",
    "repl",
    "stream",
    "string_decoder",
    "timers",
    "tls",
    "tty",
    "url",
    "util",
    "vm",
    "zlib",
])
const BACK_SLASH = /\\/gu

module.exports = {
    meta: {
        docs: {
            description:
                "disallow third-party modules which are hiding core modules",
            category: "Possible Errors",
            recommended: false,
            url:
                "https://github.com/mysticatea/eslint-plugin-node/blob/v8.0.0/docs/rules/no-hide-core-modules.md",
        },
        deprecated: true,
        fixable: null,
        schema: [
            {
                type: "object",
                properties: {
                    allow: {
                        type: "array",
                        items: { enum: Array.from(CORE_MODULES) },
                        additionalItems: false,
                        uniqueItems: true,
                    },
                    ignoreDirectDependencies: { type: "boolean" },
                    ignoreIndirectDependencies: { type: "boolean" },
                },
                additionalProperties: false,
            },
        ],
    },
    create(context) {
        if (context.getFilename() === "<input>") {
            return {}
        }
        const filePath = path.resolve(context.getFilename())
        const dirPath = path.dirname(filePath)
        const packageJson = getPackageJson(filePath)
        const deps = new Set(
            [].concat(
                Object.keys((packageJson && packageJson.dependencies) || {}),
                Object.keys((packageJson && packageJson.devDependencies) || {})
            )
        )
        const options = context.options[0] || {}
        const allow = options.allow || []
        const ignoreDirectDependencies = Boolean(
            options.ignoreDirectDependencies
        )
        const ignoreIndirectDependencies = Boolean(
            options.ignoreIndirectDependencies
        )

        return {
            "Program:exit"(node) {
                const targets = []
                    .concat(
                        getRequireTargets(context, true),
                        getImportExportTargets(context, node, true)
                    )
                    .filter(t => CORE_MODULES.has(t.moduleName))

                for (const target of targets) {
                    const name = target.moduleName
                    const allowed =
                        allow.indexOf(name) !== -1 ||
                        (ignoreDirectDependencies && deps.has(name)) ||
                        (ignoreIndirectDependencies && !deps.has(name))

                    if (allowed) {
                        continue
                    }

                    const resolved = resolve.sync(name, { basedir: dirPath })
                    const isCore = resolved === name

                    if (isCore) {
                        continue
                    }

                    context.report({
                        node: target.node,
                        loc: target.node.loc,
                        message:
                            "Unexpected import of third-party module '{{name}}'.",
                        data: {
                            name: path
                                .relative(dirPath, resolved)
                                .replace(BACK_SLASH, "/"),
                        },
                    })
                }
            },
        }
    },
}