Add Heroku support

README.md

@@ -49,6 +49,7 @@ Officially supported CI servers:
 | [dsari](https://github.com/rfinnie/dsari) | `ci.DSARI` | 🚫 |
 | [GitLab CI](https://about.gitlab.com/gitlab-ci/) | `ci.GITLAB` | 🚫 |
 | [GoCD](https://www.go.cd/) | `ci.GOCD` | 🚫 |
+| [Heroku](https://www.heroku.com) | `ci.HEROKU` | 🚫 |
 | [Hudson](http://hudson-ci.org) | `ci.HUDSON` | 🚫 |
 | [Jenkins CI](https://jenkins-ci.org) | `ci.JENKINS` | ✅ |
 | [Magnum CI](https://magnum-ci.com) | `ci.MAGNUM` | 🚫 |

index.js

@@ -12,6 +12,10 @@ Object.defineProperty(exports, '_vendors', {
 exports.name = null
 exports.isPR = null
 
+function includes (str, search) {
+  return !!~str.indexOf(search)
+}
+
 vendors.forEach(function (vendor) {
   var envs = Array.isArray(vendor.env) ? vendor.env : [vendor.env]
   var isCI = envs.every(function (obj) {
@@ -60,6 +64,13 @@ exports.isCI = !!(
 
 function checkEnv (obj) {
   if (typeof obj === 'string') return !!env[obj]
+
+  if ('env' in obj) {
+    // { env: "NODE", includes: "heroku" }
+    return obj.env in env && includes(env[obj.env], obj.includes)
+  }
+
+  // { "CI_NAME": "codeship" }
   return Object.keys(obj).every(function (k) {
     return env[k] === obj[k]
   })

test.js

@@ -273,6 +273,23 @@ test('Cirrus CI - Not PR', function (t) {
   t.end()
 })
 
+test('Heroku - Not PR', function (t) {
+  process.env.NODE = '/app/.heroku/node/bin/node'
+
+  clearModule('./')
+  var ci = require('./')
+
+  t.equal(ci.isCI, true)
+  t.equal(ci.isPR, null)
+  t.equal(ci.name, 'Heroku')
+  t.equal(ci.HEROKU, true)
+  assertVendorConstants('HEROKU', ci, t)
+
+  delete process.env.NODE
+
+  t.end()
+})
+
 test('Semaphore - PR', function (t) {
   process.env.SEMAPHORE = 'true'
   process.env.PULL_REQUEST_NUMBER = '42'

vendors.json

@@ -83,6 +83,11 @@
     "constant": "GOCD",
     "env": "GO_PIPELINE_LABEL"
   },
+  {
+    "name": "Heroku",
+    "constant": "HEROKU",
+    "env": { "env": "NODE", "includes": "heroku" }
+  },
   {
     "name": "Hudson",
     "constant": "HUDSON",