ci: Release job after tag creations (#185)

Author: M4tteoP

.github/workflows/ci.yaml

@@ -136,3 +136,17 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+
+      - name: Create draft release
+        # Triggered only on tag creation
+        if: github.event_name == 'push' && contains(github.ref, 'refs/tags/')
+        run: |
+          sudo apt install zip -y
+          ls build
+          mv build/main.wasm build/coraza-proxy-wasm.wasm
+          tag="${GITHUB_REF#refs/tags/}"
+          zip -j build/coraza-proxy-wasm-${tag}.zip build/coraza-proxy-wasm.wasm
+          ./.github/workflows/release_notes.sh ${tag} > release-notes.txt
+          gh release create ${tag} --draft --notes-file release-notes.txt --title ${GITHUB_REF#refs/tags/} ./build/coraza-proxy-wasm-${tag}.zip
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/release_notes.sh

@@ -0,0 +1,42 @@
+#!/bin/sh -ue
+# Copyright The OWASP Coraza contributors
+# SPDX-License-Identifier: Apache-2.0
+
+#
+# Highly inspired by https://github.com/tetratelabs/wazero/blob/main/.github/workflows/release_notes.sh
+#
+# This script generates the release notes for a specific release tag.
+# .github/workflows/release_notes.sh v1.3.0
+
+tag=$1
+prior_tag=$(git tag -l 'v*'|sed "/${tag}/,+10d"|tail -1)
+if [ -n "${prior_tag}" ]; then
+  range="${prior_tag}..${tag}"
+else
+  range=${tag}
+fi
+
+git config log.mailmap true
+changelog=$(git log --format='%h %s %aN, %(trailers:key=co-authored-by)' "${range}")
+
+# strip the v off the tag name more shell portable than ${tag:1}
+version=$(echo "${tag}" | cut -c2-100) || exit 1
+cat <<EOF
+coraza-proxy-wasm ${version}
+
+TODO: classify the below into up to 4 major headings and the rest as bulleted items in other changes
+The published release notes should only include the summary statement in this section.
+
+${changelog}
+
+## X packages
+
+Don't forget to cite who was involved and why
+
+## Other changes
+
+TODO: don't add trivial things like fixing spaces or non-concerns like build glitches
+
+* Z is now fixed thanks to Yogi Bear
+
+EOF