build: Use gh release notes API to generate release notes

CHANGELOG.md

@@ -1,14 +1,17 @@
-# Unreleased
-
 # v0.9.2
-- [#1476](https://github.com/kubernetes-sigs/kubefed/pull/1476)
-  feat: Introduce cluster config malformed condition to KubeFedCluster
-- [#1492](https://github.com/kubernetes-sigs/kubefed/pull/1492)
-  feat: Upgrade to controller-runtime 0.10.3
-- [#1499](https://github.com/kubernetes-sigs/kubefed/pull/1499)
-  fix: Ignore non-targeted clusters during deletion
-- [#1501](https://github.com/kubernetes-sigs/kubefed/pull/1501)
-  feat: Introduce Kubernetes version to status of KubeFedCluster
+
+## What's Changed
+* Introduce cluster config malformed condition to KubeFedCluster by @zqzten in https://github.com/kubernetes-sigs/kubefed/pull/1476
+* Handle possible conflict in updating test labels on cluster by @irfanurrehman in https://github.com/kubernetes-sigs/kubefed/pull/1500
+* Introduce Kubernetes version to status of KubeFedCluster by @zqzten in https://github.com/kubernetes-sigs/kubefed/pull/1501
+* Ignore non-targeted clusters during deletion by @jonathanbeber in https://github.com/kubernetes-sigs/kubefed/pull/1499
+* Update runtime-controller v0.10.3 by @tehlers320 in https://github.com/kubernetes-sigs/kubefed/pull/1492
+
+## New Contributors
+* @jonathanbeber made their first contribution in https://github.com/kubernetes-sigs/kubefed/pull/1499
+* @tehlers320 made their first contribution in https://github.com/kubernetes-sigs/kubefed/pull/1492
+
+**Full Changelog**: https://github.com/kubernetes-sigs/kubefed/compare/v0.9.1...v0.9.2
 
 # v0.9.1
 - [#1490](https://github.com/kubernetes-sigs/kubefed/pull/1490)

scripts/build-release.sh

@@ -108,9 +108,11 @@ function verify-container-image() {
 }
 
 function update-changelog() {
-  if ! grep "^# ${RELEASE_TAG}" CHANGELOG.md &> /dev/null; then
-    sed -i "/# Unreleased/a \\\n# ${RELEASE_TAG}" CHANGELOG.md
-  fi
+  printf "%s\n\n%s\n" \
+    "$(gh api --method POST -H "Accept: application/vnd.github.v3+json" \
+      /repos/"${GITHUB_REPO}"/releases/generate-notes -f tag_name="${RELEASE_TAG}" \
+      -q '"# "+.name+"\n\n"+.body')" \
+    "$(cat CHANGELOG.md)" > CHANGELOG.md
 }
 
 if [[ ! "${RELEASE_TAG}" =~ ${RELEASE_TAG_REGEX} ]]; then

scripts/create-gh-release.sh

@@ -51,13 +51,9 @@ function verify-assets-file-exists() {
 
 function github-release-template() {
   # Add leading # for markdown heading level 1 (h1)
-  local regex="${RELEASE_TAG_REGEX/^/^\# })"
+  local regex="${RELEASE_TAG_REGEX/^/^\# }"
   cat <<EOF
-${RELEASE_TAG}
-
-## Changelog
-
-$(sed -E "1,/${regex}/d ; /${regex}/,\$d" CHANGELOG.md)
+$(sed -En "/^# ${RELEASE_TAG}/,/${regex}/p" CHANGELOG.md | head -n-2)
 
 ## Artifacts