tools: move eslint from tools to tools/node_modules

This is required because we need to add the babel-eslint dependency
and it has to be able to resolve "eslint".
babel-eslint is required to support future ES features such as async
iterators and import.meta.

Refs: https://github.com/nodejs/node/pull/17755
PR-URL: https://github.com/nodejs/node/pull/17820
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 182 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/lib/util/glob-util.js b/tools/node_modules/eslint/lib/util/glob-util.js
new file mode 100644
index 0000000000..6a1f150a59
--- /dev/null
+++ b/tools/node_modules/eslint/lib/util/glob-util.js
@@ -0,0 +1,182 @@
+/**
+ * @fileoverview Utilities for working with globs and the filesystem.
+ * @author Ian VanSchooten
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const fs = require("fs"),
+    path = require("path"),
+    GlobSync = require("./glob"),
+
+    pathUtil = require("./path-util"),
+    IgnoredPaths = require("../ignored-paths");
+
+const debug = require("debug")("eslint:glob-util");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Checks if a provided path is a directory and returns a glob string matching
+ * all files under that directory if so, the path itself otherwise.
+ *
+ * Reason for this is that `glob` needs `/**` to collect all the files under a
+ * directory where as our previous implementation without `glob` simply walked
+ * a directory that is passed. So this is to maintain backwards compatibility.
+ *
+ * Also makes sure all path separators are POSIX style for `glob` compatibility.
+ *
+ * @param {Object}   [options]                    An options object
+ * @param {string[]} [options.extensions=[".js"]] An array of accepted extensions
+ * @param {string}   [options.cwd=process.cwd()]  The cwd to use to resolve relative pathnames
+ * @returns {Function} A function that takes a pathname and returns a glob that
+ *                     matches all files with the provided extensions if
+ *                     pathname is a directory.
+ */
+function processPath(options) {
+    const cwd = (options && options.cwd) || process.cwd();
+    let extensions = (options && options.extensions) || [".js"];
+
+    extensions = extensions.map(ext => ext.replace(/^\./, ""));
+
+    let suffix = "/**";
+
+    if (extensions.length === 1) {
+        suffix += `/*.${extensions[0]}`;
+    } else {
+        suffix += `/*.{${extensions.join(",")}}`;
+    }
+
+    /**
+     * A function that converts a directory name to a glob pattern
+     *
+     * @param {string} pathname The directory path to be modified
+     * @returns {string} The glob path or the file path itself
+     * @private
+     */
+    return function(pathname) {
+        let newPath = pathname;
+        const resolvedPath = path.resolve(cwd, pathname);
+
+        if (fs.existsSync(resolvedPath) && fs.statSync(resolvedPath).isDirectory()) {
+            newPath = pathname.replace(/[/\\]$/, "") + suffix;
+        }
+
+        return pathUtil.convertPathToPosix(newPath);
+    };
+}
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+/**
+ * Resolves any directory patterns into glob-based patterns for easier handling.
+ * @param   {string[]} patterns    File patterns (such as passed on the command line).
+ * @param   {Object} options       An options object.
+ * @returns {string[]} The equivalent glob patterns and filepath strings.
+ */
+function resolveFileGlobPatterns(patterns, options) {
+
+    const processPathExtensions = processPath(options);
+
+    return patterns.filter(p => p.length).map(processPathExtensions);
+}
+
+/**
+ * Build a list of absolute filesnames on which ESLint will act.
+ * Ignored files are excluded from the results, as are duplicates.
+ *
+ * @param   {string[]} globPatterns            Glob patterns.
+ * @param   {Object}   [options]               An options object.
+ * @param   {string}   [options.cwd]           CWD (considered for relative filenames)
+ * @param   {boolean}  [options.ignore]        False disables use of .eslintignore.
+ * @param   {string}   [options.ignorePath]    The ignore file to use instead of .eslintignore.
+ * @param   {string}   [options.ignorePattern] A pattern of files to ignore.
+ * @returns {string[]} Resolved absolute filenames.
+ */
+function listFilesToProcess(globPatterns, options) {
+    options = options || { ignore: true };
+    const files = [],
+        added = {};
+
+    const cwd = (options && options.cwd) || process.cwd();
+
+    /**
+     * Executes the linter on a file defined by the `filename`. Skips
+     * unsupported file extensions and any files that are already linted.
+     * @param {string} filename The file to be processed
+     * @param {boolean} shouldWarnIgnored Whether or not a report should be made if
+     *                                    the file is ignored
+     * @param {IgnoredPaths} ignoredPaths An instance of IgnoredPaths
+     * @returns {void}
+     */
+    function addFile(filename, shouldWarnIgnored, ignoredPaths) {
+        let ignored = false;
+        let isSilentlyIgnored;
+
+        if (ignoredPaths.contains(filename, "default")) {
+            ignored = (options.ignore !== false) && shouldWarnIgnored;
+            isSilentlyIgnored = !shouldWarnIgnored;
+        }
+
+        if (options.ignore !== false) {
+            if (ignoredPaths.contains(filename, "custom")) {
+                if (shouldWarnIgnored) {
+                    ignored = true;
+                } else {
+                    isSilentlyIgnored = true;
+                }
+            }
+        }
+
+        if (isSilentlyIgnored && !ignored) {
+            return;
+        }
+
+        if (added[filename]) {
+            return;
+        }
+        files.push({ filename, ignored });
+        added[filename] = true;
+    }
+
+    debug("Creating list of files to process.");
+    globPatterns.forEach(pattern => {
+        const file = path.resolve(cwd, pattern);
+
+        if (fs.existsSync(file) && fs.statSync(file).isFile()) {
+            const ignoredPaths = new IgnoredPaths(options);
+
+            addFile(fs.realpathSync(file), true, ignoredPaths);
+        } else {
+
+            // regex to find .hidden or /.hidden patterns, but not ./relative or ../relative
+            const globIncludesDotfiles = /(?:(?:^\.)|(?:[/\\]\.))[^/\\.].*/.test(pattern);
+
+            const ignoredPaths = new IgnoredPaths(Object.assign({}, options, { dotfiles: options.dotfiles || globIncludesDotfiles }));
+            const shouldIgnore = ignoredPaths.getIgnoredFoldersGlobChecker();
+            const globOptions = {
+                nodir: true,
+                dot: true,
+                cwd
+            };
+
+            new GlobSync(pattern, globOptions, shouldIgnore).found.forEach(globMatch => {
+                addFile(path.resolve(cwd, globMatch), false, ignoredPaths);
+            });
+        }
+    });
+
+    return files;
+}
+
+module.exports = {
+    resolveFileGlobPatterns,
+    listFilesToProcess
+};