feat: Add danger (getsentry#1574)

* feat: Add danger

* feat: Add travis danger job

* meta: Add sizecheck to danger

* ref: Delete dead code

.travis.yml

@@ -15,6 +15,9 @@ cache:
 
 matrix:
   include:
+    - name: '@sentry/packages - danger'
+      node_js: '8'
+      script: .travis/danger.sh
     - name: '@sentry/packages - lint'
       node_js: '8'
       script: .travis/lint.sh

.travis/danger.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+set -e
+
+yarn
+# We have to build it first, so that TypeScript Types are recognized correctly
+yarn build
+yarn danger ci

.travis/lint.sh

@@ -5,4 +5,3 @@ yarn
 # We have to build it first, so that TypeScript Types are recognized correctly
 yarn build
 yarn lint
-

dangerfile.ts

@@ -0,0 +1,21 @@
+import { exec } from 'child_process';
+import { danger, message, schedule, warn } from 'danger';
+import { promisify } from 'util';
+
+export default async () => {
+  if (!danger.github) {
+    return;
+  }
+
+  const hasChangelog = danger.git.modified_files.indexOf('CHANGELOG.md') !== -1;
+  const isTrivial = (danger.github.pr.body + danger.github.pr.title).includes('#trivial');
+
+  if (!hasChangelog && !isTrivial) {
+    warn('Please add a changelog entry for your changes.');
+  }
+
+  schedule(async () => {
+    const result = (await promisify(exec)('cd packages/browser; yarn size:check')).stdout;
+    message(`@sentry/browser gzip minified size: ${result.split('\n')[1]}`);
+  });
+};

package.json

@@ -29,6 +29,7 @@
     "@types/sinon": "^4.3.1",
     "chai": "^4.1.2",
     "codecov": "^3.0.2",
+    "danger": "^4.0.2",
     "jest": "^22.4.3",
     "karma-sinon": "^1.0.5",
     "lerna": "3.4.0",