Add release notes parser and release update action

.github/release-notes.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+# -e  Exit immediately if a command exits with a non-zero status.
+# -u  Treat unset variables as an error when substituting.
+
+set -eu
+set -o pipefail
+
+# Get Release notes for the latest release from CHANGELOG.md
+# How to use:
+#   release-notes.sh CHANGELOG.md > ReleaseNotes.md
+
+startline=$(($(cat "$1" | grep -nE '^## \[v[0-9]+' | head -n 1 | tail -n 1 | cut -d ":" -f 1) + 1))
+finishline=$(($(cat "$1" | grep -nE '^## \[v[0-9]+' | head -n 2 | tail -n 1 | cut -d ":" -f 1) - 1))
+changelog=$(sed -n "${startline},${finishline}p" "$1");
+
+echo "${changelog}"

.github/workflows/build.yml

@@ -78,3 +78,24 @@ jobs:
           DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
           DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
           DOCKERHUB_REPOSITORY: alexmon1989/dripper
+
+      - name: Get the release version
+        if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags/') }}
+        id: get-version
+        run: |
+          echo ::set-output name=version::${GITHUB_REF#refs/tags/}
+
+      - name: Prepare Release Notes
+        if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags/') }}
+        run: |
+          ./.github/release-notes.sh ./CHANGELOG.md > ./release-notes.md
+
+      - name: Update Release notes
+        if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags/') }}
+        uses: ncipollo/release-action@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          name: v${{ steps.get-version.outputs.version }}
+          tag: ${{ steps.get-version.outputs.version }}
+          bodyFile: "./release-notes.md"
+          allowUpdates: true