Use GREN as the toolkit

Author: luxas

.github/workflows/goreleaser.yaml

@@ -11,16 +11,25 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
+      - name: Unshallow
+        run: git fetch --prune --unshallow
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
           go-version: 1.14
+      # Similar as to https://github.com/fluxcd/toolkit/blob/master/.github/workflows/release.yaml#L20-L27
+      - name: Download release notes utility
+        env:
+          GH_REL_URL: https://github.com/buchanae/github-release-notes/releases/download/0.2.0/github-release-notes-linux-amd64-0.2.0.tar.gz
+        run: cd /tmp && curl -sSL ${GH_REL_URL} | tar xz && sudo mv github-release-notes /usr/local/bin/
+      - name: Generate release notes
+        run: |
+          echo 'CHANGELOG' > /tmp/release.txt
+          github-release-notes -org fluxcd -repo go-git-providers -since-latest-release >> /tmp/release.txt
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v2
         with:
           version: latest
-          args: release --rm-dist
+          args: release --release-notes=/tmp/release.txt --rm-dist
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}