Add GitHub actions for releasing on GitHub

.github/workflows/release.yml

@@ -0,0 +1,37 @@
+name: Release
+
+on:
+  push:
+    tags: ["v*"]
+
+jobs:
+  release:
+    name: Trigger release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Generate the changelog
+        id: changelog
+        uses: cliqz-oss/adblocker/generate-changelog
+        env:
+          GITHUB_AUTH: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create a GitHub release
+        uses: cliqz-oss/adblocker/publish-github-release
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Commit CHANGELOG.md
+        run: |
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          git add CHANGELOG.md
+          git commit -m "Update CHANGELOG.md [skip ci]" --no-verify --quiet
+
+      - name: Push CHANGELOG.md
+        uses: ad-m/github-push-action@v0.5.0
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          branch: 'master'
+          force: false

.github/workflows/tests.yml

@@ -1,6 +1,6 @@
 name: Tests
 
-on: [push, pull_request]
+on: [pull_request]
 
 jobs:
   test:

actions/generate-changelog/action.yml

@@ -0,0 +1,10 @@
+name: Generate changelog
+description: Uses lerna-changelog to create CHANGELOG.md
+
+runs:
+  using: node12
+  main: main.js
+
+branding:
+  icon: clock
+  color: yellow

actions/generate-changelog/main.js

@@ -0,0 +1,20 @@
+const { writeFileSync } = require('fs');
+const { resolve } = require('path');
+
+const { execSync } = require('child_process');
+execSync(`cd ${__dirname}; npm ci`);
+
+const currentTag = execSync(`git describe --abbrev=0 --tags ${process.env.GITHUB_SHA}`)
+  .toString()
+  .trim();
+
+writeFileSync(
+  resolve(process.env.GITHUB_WORKSPACE, 'CHANGELOG.md'),
+  execSync(
+    `node ${resolve(
+      __dirname,
+      'node_modules/.bin/lerna-changelog',
+    )} --from v1.0.0 --to ${currentTag}`,
+  ).toString().trim(),
+  'utf-8',
+);