Add prettier configuration to eslint.

.eslintrc.js

@@ -4,8 +4,11 @@ module.exports = {
     ecmaVersion: 2017,
     sourceType: 'module',
   },
-  extends: ['eslint:recommended'],
+  extends: ['eslint:recommended', 'prettier'],
+  plugins: ['prettier'],
   rules: {
+    'prettier/prettier': 'error',
+
     'no-unused-vars': ['error', {
       'args': 'none',
     }],

.prettierrc.js

@@ -0,0 +1,7 @@
+'use strict';
+
+module.exports = {
+  singleQuote: true,
+  trailingComma: 'es5',
+  printWidth: 100,
+};

package.json

@@ -99,12 +99,15 @@
     "ember-source-channel-url": "^1.0.1",
     "ember-try": "^0.2.23",
     "ember-watson": "^0.7.0",
+    "eslint-config-prettier": "^2.9.0",
     "eslint-plugin-node": "^6.0.1",
+    "eslint-plugin-prettier": "^2.6.0",
     "github": "^1.1.1",
     "glob": "^5.0.13",
     "loader.js": "^4.5.0",
     "mocha": "^2.4.5",
     "mocha-only-detector": "0.0.2",
+    "prettier": "^1.12.1",
     "rimraf": "2.5.2",
     "rsvp": "4.8.0",
     "testdouble": "^3.2.6",

yarn.lock

@@ -3178,6 +3178,12 @@ escape-string-regexp@^1.0.0, escape-string-regexp@^1.0.2, escape-string-regexp@^
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
+eslint-config-prettier@^2.9.0:
+  version "2.9.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-2.9.0.tgz#5ecd65174d486c22dff389fe036febf502d468a3"
+  dependencies:
+    get-stdin "^5.0.1"
+
 eslint-plugin-node@^6.0.1:
   version "6.0.1"
   resolved "https://registry.yarnpkg.com/eslint-plugin-node/-/eslint-plugin-node-6.0.1.tgz#bf19642298064379315d7a4b2a75937376fa05e4"
@@ -3187,6 +3193,13 @@ eslint-plugin-node@^6.0.1:
     resolve "^1.3.3"
     semver "^5.4.1"
 
+eslint-plugin-prettier@^2.6.0:
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-2.6.0.tgz#33e4e228bdb06142d03c560ce04ec23f6c767dd7"
+  dependencies:
+    fast-diff "^1.1.1"
+    jest-docblock "^21.0.0"
+
 eslint-scope@^3.7.1:
   version "3.7.1"
   resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-3.7.1.tgz#3d63c3edfda02e06e01a452ad88caacc7cdcb6e8"
@@ -3520,6 +3533,10 @@ fast-deep-equal@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-1.1.0.tgz#c053477817c86b51daa853c81e059b733d023614"
 
+fast-diff@^1.1.1:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/fast-diff/-/fast-diff-1.1.2.tgz#4b62c42b8e03de3f848460b639079920695d0154"
+
 fast-json-stable-stringify@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz#d5142c0caee6b1189f87d3a76111064f86c8bbf2"
@@ -3879,6 +3896,10 @@ get-stdin@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-4.0.1.tgz#b968c6b0a04384324902e8bf1a5df32579a450fe"
 
+get-stdin@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-5.0.1.tgz#122e161591e21ff4c52530305693f20e6393a398"
+
 get-stream@3.0.0, get-stream@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-3.0.0.tgz#8e943d1358dc37555054ecbe2edb05aa174ede14"
@@ -4722,6 +4743,10 @@ jade@0.26.3:
     commander "0.6.1"
     mkdirp "0.3.0"
 
+jest-docblock@^21.0.0:
+  version "21.2.0"
+  resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-21.2.0.tgz#51529c3b30d5fd159da60c27ceedc195faf8d414"
+
 jmespath@0.15.0:
   version "0.15.0"
   resolved "https://registry.yarnpkg.com/jmespath/-/jmespath-0.15.0.tgz#a3f222a9aae9f966f5d27c796510e28091764217"
@@ -6118,6 +6143,10 @@ pretender@^1.4.2:
     fake-xml-http-request "^1.6.0"
     route-recognizer "^0.3.3"
 
+prettier@^1.12.1:
+  version "1.12.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.12.1.tgz#c1ad20e803e7749faf905a409d2367e06bbe7325"
+
 pretty-ms@^3.1.0:
   version "3.1.0"
   resolved "https://registry.npmjs.org/pretty-ms/-/pretty-ms-3.1.0.tgz#e9cac9c76bf6ee52fe942dd9c6c4213153b12881"