Linting with Coala.

This new script and the associated configuration files lint our source
code (JS and C++). This will be extended in the future, refs #4833.

Reviewed By: Imarok
Differential Revision: https://code.wildfiregames.com/D213
This was SVN commit r20364.

.coafile

@@ -0,0 +1,10 @@
+[Source]
+bears = CPPCheckBear
+files = source/**.(cpp|h)
+ignore = source/third_party/**
+
+[JS]
+bears = ESLintBear, JSHintBear
+eslint_config = build/jenkins/lint-config/eslintrc.json
+jshint_config = build/jenkins/lint-config/jshintrc.json
+files = binaries/data/**.js

build/jenkins/lint-config/eslintrc.json

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+{
+    "parserOptions": {
+        "ecmaVersion": 6
+    },
+    "plugins": [
+        "brace-rules"
+    ],
+    "rules": {
+        "no-cond-assign": 1,
+        "no-constant-condition": 1,
+        "no-dupe-args": 1,
+        "no-dupe-keys": 1,
+        "no-duplicate-case": 1,
+        "no-empty": 1,
+        "no-extra-boolean-cast": 0,
+        "no-extra-parens": 0,
+        "no-extra-semi": 1,
+        "no-func-assign": 1,
+        "no-negated-in-lhs": 1,
+        "no-obj-calls": 1,
+        "no-unreachable": 1,
+        "use-isnan": 1,
+        "valid-jsdoc": 0,
+        "valid-typeof": 1,
+
+        "block-scoped-var": 0,
+        "consistent-return": 1,
+        "curly": ["warn", "multi"],
+        "default-case": 1,
+        "dot-notation": 1,
+        "no-else-return": 1,
+        "no-invalid-this": 1,
+        "no-lone-blocks": 1,
+        "no-loop-func": 0,
+        "no-multi-spaces": ["warn", { "ignoreEOLComments": true }],
+        "no-new": 1,
+        "no-redeclare": 0,
+        "no-return-assign": 1,
+        "no-self-assign": 1,
+        "no-self-compare": 1,
+        "no-unmodified-loop-condition": 1,
+        "no-unused-expressions": 1,
+        "no-unused-labels": 1,
+        "no-useless-concat": 0,
+        "yoda": 1,
+
+        "no-delete-var": 1,
+        "no-label-var": 1,
+        "no-shadow-restricted-names": 1,
+        "no-shadow": 1,
+        "no-undef": 0,
+        "no-undef-init": 1,
+        "no-unused-vars": 0,
+
+        "comma-spacing": 1,
+        "indent": ["warn", "tab", { "outerIIFEBody": 0 }],
+        "key-spacing": 1,
+        "new-cap": 0,
+        "new-parens": 1,
+        "no-mixed-spaces-and-tabs": ["warn", "smart-tabs"],
+        "no-multi-assign": 1,
+        "no-trailing-spaces": 1,
+        "no-unneeded-ternary": 1,
+        "object-curly-spacing": ["warn", "always"],
+        "operator-assignment": 1,
+        "operator-linebreak": ["warn", "after"],
+        "quote-props": 1,
+        "semi": 1,
+        "semi-spacing": 1,
+        "space-before-function-paren": ["warn", "never"],
+        "space-in-parens": 1,
+        "space-unary-ops": 1,
+        "spaced-comment": ["warn", "always"],
+
+        "no-class-assign": 1,
+        "no-const-assign": 1,
+        "no-dupe-class-members" : 1,
+        "prefer-const": 0,
+
+        "brace-rules/brace-on-same-line": ["warn", {
+            "FunctionDeclaration": "never",
+            "FunctionExpression": "ignore",
+            "ArrowFunctionExpression": "always",
+            "IfStatement": "never",
+            "TryStatement": "ignore",
+            "CatchClause": "ignore",
+            "DoWhileStatement": "never",
+            "WhileStatement": "never",
+            "ForStatement": "never",
+            "ForInStatement": "never",
+            "ForOfStatement": "never",
+            "SwitchStatement": "never"
+        }, { "allowSingleLine": true }]
+    }
+}

build/jenkins/lint-config/jshintrc.json

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+{
+    "esversion": 6,
+    "eqeqeq": false,
+    "freeze": true,
+    "latedef": "nofunc",
+    "loopfunc": true,
+    "noarg": true,
+    "nonbsp": true,
+    "undef": false,
+    "unused": false
+}

build/jenkins/lint-patch.sh

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+#!/bin/sh
+
+# Lint errors should not count as build failures
+set +e
+set -v
+
+# Move to the root of the repository (this script is in build/jenkins/)
+cd "$(dirname $0)"/../../
+
+arc patch --diff "$DIFF_ID" --force
+
+svn st | grep '^[AM]' | cut -c 9- | xargs coala --ci --flush-cache --limit-files > .phabricator-comment