Merge pull request #1970 from iced-rs/ci/verify-changelog

Add workflow to verify `CHANGELOG` is always up-to-date

.github/workflows/verify.yml

@@ -0,0 +1,19 @@
+name: Verify
+on:
+  pull_request:
+    branches:
+      - master
+jobs:
+  changelog:
+    runs-on: ubuntu-20.04
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - name: Check `CHANGELOG.md` has changes
+      run: |
+        ! git diff --exit-code origin/master HEAD -- CHANGELOG.md
+    - name: Check `CHANGELOG.md` has PR author
+      if: ${{ github.event.pull_request.user.login != 'hecrj' }}
+      run: |
+        sed -n '/## \[Unreleased\]/,/^## /p' CHANGELOG.md | sed -n '/Many thanks to.../,//p' | grep '@${{ github.event.pull_request.user.login }}'

CHANGELOG.md

@@ -36,6 +36,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `Viewport` argument to `Widget::on_event`. [#1956](https://github.com/iced-rs/iced/pull/1956)
 - Nix instructions to `DEPENDENCIES.md`. [#1859](https://github.com/iced-rs/iced/pull/1859)
 - Loading spinners example. [#1902](https://github.com/iced-rs/iced/pull/1902)
+- Workflow that verifies `CHANGELOG` is always up-to-date. [#1970](https://github.com/iced-rs/iced/pull/1970)
 
 ### Changed
 - Updated `wgpu` to `0.16`. [#1807](https://github.com/iced-rs/iced/pull/1807)