Initial linting efforts.

Summary:
Install node:
  http://nodejs.org/

Install npm:
  curl https://npmjs.org/install.sh | sudo sh

Install jshint:
  sudo npm install -g jshint

Install pep8 and pylint:
  pip install pep8 pylint

Test Plan: modify a .js or .py file

Reviewers: bogdan2412

Reviewed By: bogdan2412

Differential Revision: http://phab.code4fun.de/D2

.arcconfig

@@ -1,4 +1,16 @@
 {
   "project_id": "CodeStreak",
-  "conduit_uri": "http://phab.code4fun.de/"
+  "conduit_uri": "http://phab.code4fun.de/",
+  "load": [
+    "libcustom/src"
+  ],
+  "lint.engine": "DefaultLintEngine",
+
+  "lint.jshint.prefix": "/usr/local/bin",
+  "lint.jshint.bin": "jshint",
+  "lint.jshint.config": ".jshintconfig",
+
+  "lint.pylint.codes.error": "^(E|F).*",
+  "lint.pylint.codes.warning": "^(W|R|C).*",
+  "lint.pylint.codes.advice" : ""
 }

.jshintconfig

@@ -0,0 +1,13 @@
+{
+  "browser": true,
+  "devel": true,
+  "jquery": true,
+
+  "indent" : 2,
+  "bitwise" : true,
+  "trailing" : true,
+  "curly" : true,
+  "eqeqeq" : true,
+  "undef" : true,
+  "immed" : true
+}

libcustom/src/.gitignore

@@ -0,0 +1 @@
+.phutil_module_cache

libcustom/src/__phutil_library_init__.php

@@ -0,0 +1,3 @@
+<?php
+
+phutil_register_library('libcustom', __FILE__);

libcustom/src/__phutil_library_map__.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * This file is automatically generated. Use 'arc liberate' to rebuild it.
+ * @generated
+ * @phutil-library-version 2
+ */
+
+phutil_register_library_map(array(
+  '__library_version__' => 2,
+  'class' =>
+  array(
+    'DefaultLintEngine' => 'lint/DefaultLintEngine.php',
+  ),
+  'function' =>
+  array(
+  ),
+  'xmap' =>
+  array(
+    'DefaultLintEngine' => 'ArcanistLintEngine',
+  ),
+));

libcustom/src/lint/DefaultLintEngine.php

@@ -0,0 +1,74 @@
+<?php
+
+final class DefaultLintEngine extends ArcanistLintEngine {
+  private $static_file_regexp = array(
+    "^(M|m)akefile$",
+    "\.min\.(js|css)$",
+    "\.json$",
+    "^db.sqlite3$",
+  );
+  public function buildLinters() {
+
+    // This is a list of paths which the user wants to lint. Either they
+    // provided them explicitly, or arc figured them out from a commit or set
+    // of changes. The engine needs to return a list of ArcanistLinter objects,
+    // representing the linters which should be run on these files.
+    $paths = $this->getPaths();
+
+    // Linters are responsible for actually analyzing the contents of a file
+    // and raising warnings and errors.
+    $python_linter = new ArcanistPyLintLinter();
+    $js_linter = new ArcanistJSHintLinter();
+    $file_linter = new ArcanistTextLinter();
+
+    // Remove any paths that don't exist before we add paths to linters. We want
+    // to do this for linters that operate on file contents because the
+    // generated list of paths will include deleted paths when a file is
+    // removed.
+    foreach ($paths as $key => $path) {
+      if (!$this->pathExists($path)) {
+        unset($paths[$key]);
+      }
+    }
+
+    /*
+    $file_linter->setPaths($paths);
+    $python_linter->setPaths(preg_grep('/\.py$/', $paths));
+    $js_linter->setPaths(preg_grep('/\.js$/', $paths));
+     */
+
+    foreach ($paths as $path) {
+      if (preg_match('@/static/.*/img/@', $path)) {
+        continue;
+      }
+      if (preg_match('@/externals/@', $path)) {
+        continue;
+      }
+
+      // whitespace
+      $match = "/(" . implode("|",$this->static_file_regexp) . ")/";
+      if (!preg_match($match, $path)) {
+        $file_linter->addPath($path);
+      }
+
+      // python
+      if (preg_match('/\.py$/', $path)
+        && !preg_match('/\/xhpy\//', $path)
+        && !preg_match('/views.py$/', $path)) {
+        $python_linter->addPath($path);
+      }
+
+      // javascript
+      if (preg_match('/\.js$/', $path) && !preg_match('/\.min\.js$/', $path)) {
+        $js_linter->addPath($path);
+      }
+    }
+
+    return array(
+      $python_linter,
+      $js_linter,
+      $file_linter,
+    );
+  }
+
+}