scripts, .github/workflows/release.yaml: add script to extract changelog

the new scripts/extract-changelog.sh script is used to extract the
changelog from a tag name. This script is used in the release.yaml
workflow to extract the changelog for the release notes.

it also updates the release.yaml workflow to determine a prerelease
based on the tag name.

Signed-off-by: jiaxiao zhou <[email protected]>

Author: Mossaka

.github/workflows/release.yaml

@@ -47,15 +47,30 @@ jobs:
           mkdir -p _dist
           cp ./deployments/workloads/runtime.yaml _dist/runtime.yaml
           cp ./deployments/workloads/workload.yaml _dist/workload.yaml
-
+      
+      - name: extract changelog
+        run: |
+          TAG_NAME=${GITHUB_REF#refs/tags/}
+          cd $GITHUB_WORKSPACE
+          ./scripts/extract-changelog.sh $TAG_NAME > RELEASE_NOTES.md
+          cat RELEASE_NOTES.md
+  
       - name: create release
         if: startsWith(github.ref, 'refs/tags/v')
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
+          TAG_NAME=${GITHUB_REF#refs/tags/}
+          if [[ "$TAG_NAME" =~ .+-pre.* ]]; then
+            PRERELEASE_ARGS="--prerelease --latest=false"
+          else
+            PRERELEASE_ARGS=""
+          fi
           gh release create ${{ env.RELEASE_VERSION }} \
-            --generate-notes \
-            -p \
+            --notes-file RELEASE_NOTES.md \
+            --title ${{ env.RELEASE_VERSION }} \
+            --verify-tag
+            $PRERELEASE_ARGS \
             _dist/runtime.yaml#example-runtimes \
             _dist/workload.yaml#example-workloads \
 

scripts/extract-changelog.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# Inspired by https://stackoverflow.com/questions/40450238/parse-a-changelog-and-extract-changes-for-a-version
+# This script will extract the changelog for a specific version from the CHANGELOG.md file
+# Usage: ./extract-changelog.sh <version>
+version=$1
+
+awk -v ver="$version" '
+/^## \[.*\]/ {
+  if (p) exit
+  if ($0 ~ "^## \\[" ver "\\]") { p=1; next }
+}
+p' CHANGELOG.md