Setup clang-format, tslint and editorconfig

Author: justinfagnani

.editorconfig

@@ -0,0 +1,19 @@
+# Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+# This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+# The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+# The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+# Code distributed by Google as part of the polymer project is also
+# subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+
+# Polymer EditorConfig
+
+root = true
+
+[*]
+charset = utf-8
+indent_size = 2
+indent_style = space
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false

package.json

@@ -15,14 +15,17 @@
     "pretest": "npm run posttest; ln -s node_modules bower_components",
     "test": "wct -l chrome",
     "posttest": "rm -f bower_components",
-    "checksize": "uglifyjs lit-html.js -mc --toplevel | gzip -9 | wc -c"
+    "checksize": "uglifyjs lit-html.js -mc --toplevel | gzip -9 | wc -c",
+    "format": "find src test | grep '\\.js$\\|\\.ts$' | xargs clang-format --style=file -i",
+    "lint": "tslint --project ./"
   },
   "author": "The Polymer Authors",
   "devDependencies": {
     "@types/chai": "^4.0.1",
     "@types/mocha": "^2.2.41",
     "chai": "^4.0.2",
     "mocha": "^3.4.2",
+    "tslint": "^5.7.0",
     "typedoc": "^0.8.0",
     "typescript": "^2.4.1",
     "uglify-es": "^3.0.27",

tslint.json

@@ -0,0 +1,61 @@
+{
+  "rules": {
+    "arrow-parens": true,
+    "class-name": true,
+    "indent": [
+      true,
+      "spaces",
+      2
+    ],
+    "prefer-const": true,
+    "no-duplicate-variable": true,
+    "no-eval": true,
+    "no-internal-module": true,
+    "no-trailing-whitespace": true,
+    "no-var-keyword": true,
+    "one-line": [
+      true,
+      "check-open-brace",
+      "check-whitespace"
+    ],
+    "quotemark": [
+      true,
+      "single",
+      "avoid-escape"
+    ],
+    "semicolon": [
+      true,
+      "always"
+    ],
+    "trailing-comma": [
+      true,
+      "multiline"
+    ],
+    "triple-equals": [
+      true,
+      "allow-null-check"
+    ],
+    "typedef-whitespace": [
+      true,
+      {
+        "call-signature": "nospace",
+        "index-signature": "nospace",
+        "parameter": "nospace",
+        "property-declaration": "nospace",
+        "variable-declaration": "nospace"
+      }
+    ],
+    "variable-name": [
+      true,
+      "ban-keywords"
+    ],
+    "whitespace": [
+      true,
+      "check-branch",
+      "check-decl",
+      "check-operator",
+      "check-separator",
+      "check-type"
+    ]
+  }
+}