tools: enable additional lint rules

Enable additional likely-uncontroversial lint rules:

* `comma-dangle` set to prohibit dangling commas on objects and arrays
that are defined on a single line. Multi-line definitions can use or
omit a trailing comma.

* `no-unused-labels` Prohibits defining a label that is not used.

* `no-path-concat` Prohibits string-concatenation using i`__dirname` and
`__filename`. Use `path.join()`, `path.resolve()`, or template strings
instead.

* `no-new-symbol` disallow use of `new` operator with `Symbol` object.
Violating this rule would result in a `TypeError` at runtime.`

PR-URL: https://github.com/nodejs/node/pull/5357
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/.eslintrc b/.eslintrc
index d76e058b368..b9ebff875f1 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -5,6 +5,7 @@ env:
 rules:
   # Possible Errors
   # https://github.com/eslint/eslint/tree/master/docs/rules#possible-errors
+  comma-dangle: [2, "only-multiline"]
   no-control-regex: 2
   no-debugger: 2
   no-dupe-args: 2
@@ -30,6 +31,7 @@ rules:
   no-fallthrough: 2
   no-octal: 2
   no-redeclare: 2
+  no-unused-labels: 2
 
   # Variables
   # http://eslint.org/docs/rules/#variables
@@ -41,6 +43,7 @@ rules:
   # http://eslint.org/docs/rules/#nodejs-and-commonjs
   no-mixed-requires: 2
   no-new-require: 2
+  no-path-concat: 2
   no-restricted-modules: [2, "sys", "_linklist"]
 
   # Stylistic Issues
@@ -71,6 +74,7 @@ rules:
   no-confusing-arrow: 2
   no-const-assign: 2
   no-dupe-class-members: 2
+  no-new-symbol: 2
   no-this-before-super: 2
   prefer-const: 2