tools: replace closure-linter with eslint

PR-URL: https://github.com/iojs/io.js/pull/1539
Fixes: https://github.com/iojs/io.js/issues/1253
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>

1 files changed, 133 insertions, 0 deletions

diff --git a/tools/eslint/lib/ignored-paths.js b/tools/eslint/lib/ignored-paths.js
new file mode 100644
index 0000000000..3d2bd9b44c
--- /dev/null
+++ b/tools/eslint/lib/ignored-paths.js
@@ -0,0 +1,133 @@
+/**
+ * @fileoverview Responsible for loading ignore config files and managing ignore patterns
+ * @author Jonathan Rajavuori
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+var fs = require("fs"),
+    debug = require("debug"),
+    minimatch = require("minimatch"),
+    FileFinder = require("./file-finder");
+
+debug = debug("eslint:ignored-paths");
+
+
+//------------------------------------------------------------------------------
+// Constants
+//------------------------------------------------------------------------------
+
+var ESLINT_IGNORE_FILENAME = ".eslintignore";
+
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Load and parse ignore patterns from the file at the given path
+ * @param {string} filepath Path to the ignore file.
+ * @returns {string[]} An array of ignore patterns or an empty array if no ignore file.
+ */
+function loadIgnoreFile(filepath) {
+    var ignorePatterns = [];
+
+    function nonEmpty(line) {
+        return line.trim() !== "" && line[0] !== "#";
+    }
+
+    if (filepath) {
+        try {
+            ignorePatterns = fs.readFileSync(filepath, "utf8").split(/\r?\n/).filter(nonEmpty);
+        } catch (e) {
+            e.message = "Cannot read ignore file: " + filepath + "\nError: " + e.message;
+            throw e;
+        }
+    }
+
+    return ["node_modules/**"].concat(ignorePatterns);
+}
+
+var ignoreFileFinder;
+
+/**
+ * Find an ignore file in the current directory or a parent directory.
+ * @returns {string} Path of ignore file or an empty string.
+ */
+function findIgnoreFile() {
+    if (!ignoreFileFinder) {
+        ignoreFileFinder = new FileFinder(ESLINT_IGNORE_FILENAME);
+    }
+
+    return ignoreFileFinder.findInDirectoryOrParents();
+}
+
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+/**
+ * IgnoredPaths
+ * @constructor
+ * @class IgnoredPaths
+ * @param {Array} patterns to be matched against file paths
+ */
+function IgnoredPaths(patterns) {
+    this.patterns = patterns;
+}
+
+/**
+ * IgnoredPaths initializer
+ * @param {Object} options object containing 'ignore' and 'ignorePath' properties
+ * @returns {IgnoredPaths} object, with patterns loaded from the ignore file
+ */
+IgnoredPaths.load = function (options) {
+    var patterns;
+
+    options = options || {};
+
+    if (options.ignore) {
+        patterns = loadIgnoreFile(options.ignorePath || findIgnoreFile());
+    } else {
+        patterns = [];
+    }
+
+    return new IgnoredPaths(patterns);
+};
+
+/**
+ * Determine whether a file path is included in the configured ignore patterns
+ * @param {string} filepath Path to check
+ * @returns {boolean} true if the file path matches one or more patterns, false otherwise
+ */
+IgnoredPaths.prototype.contains = function (filepath) {
+    if (this.patterns === null) {
+        throw new Error("No ignore patterns loaded, call 'load' first");
+    }
+
+    filepath = filepath.replace("\\", "/");
+    filepath = filepath.replace(/^\.\//, "");
+    return this.patterns.reduce(function(ignored, pattern) {
+        var negated = pattern[0] === "!",
+            matches;
+
+        if (negated) {
+            pattern = pattern.slice(1);
+        }
+
+        // Remove leading "current folder" prefix
+        if (pattern.indexOf("./") === 0) {
+            pattern = pattern.slice(2);
+        }
+
+        matches = minimatch(filepath, pattern) || minimatch(filepath, pattern + "/**");
+
+        return matches ? !negated : ignored;
+    }, false);
+};
+
+module.exports = IgnoredPaths;