chore: always create a new release branch and delete all old ones dur…

…ing new release action (#894)

#### What this PR does / why we need it

When we create a new release, then let's always be prepared for a
potential hotfix and create the release branch.
On the other hand, this will create a lot of unused branches over the
time, so the PR will delete all older release branches.
In case of serious situation, where we really need to fix older
versions, we still have the tags in place and would need to create
manually a patched old release.

#### Which issue(s) this PR fixes

releates open-component-model/ocm-project#240

.github/pull_request_template.md

@@ -1,7 +1,3 @@
----
-labels: kind/skip-release-notes
----
-
 <!-- markdownlint-disable MD041 -->
 #### What this PR does / why we need it
 

.github/workflows/lint_and_test.yaml

@@ -67,7 +67,6 @@ jobs:
       - name: Setup lint
         run: |
           make -f hack/Makefile golangci-lint
-          #curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.54.2
       - name: Lint
         run: |
           PATH=$PATH:$(go env GOPATH)/bin make check
@@ -78,7 +77,7 @@ jobs:
     steps:
       - name: Self Hosted Runner Post Job Cleanup Action
         uses: TooMuch4U/[email protected]
-        
+
       - name: Checkout
         uses: actions/checkout@v4
         with:
@@ -103,4 +102,3 @@ jobs:
       - name: Check for diff
         run: |
           git diff --exit-code --shortstat
-  

.github/workflows/release.yaml

@@ -5,19 +5,14 @@ on:
     inputs:
       release_candidate:
         type: boolean
-        description: "Release Candidate"
-        required: false
-        default: false
-      create_branch:
-        type: boolean
-        description: "Create Release Branch"
+        description: 'Release Candidate'
         required: false
         default: false
       prerelease:
         type: string
-        description: "Release Candidate Name"
+        description: 'Release Candidate Name'
         required: false
-        default: ""
+        default: ''
 
 jobs:
   check:
@@ -46,11 +41,6 @@ jobs:
         else
           v="v$(go run $GITHUB_WORKSPACE/api/version/generate print-version)"
           echo "Final Release: $v"
-          if ${{ github.event.inputs.create_branch }}; then
-            echo "with release branch creation"
-          else
-            echo "without release branch creation"
-          fi
         fi
 
     - name: Set Base Version
@@ -79,7 +69,7 @@ jobs:
         fi
 
     - name: Check Branch
-      if: inputs.release_candidate == false && inputs.create_branch
+      if: inputs.release_candidate == false && github.ref == 'refs/heads/main'
       run: |
         set -e
         if git ls-remote --exit-code origin refs/heads/releases/${{ env.RELEASE_VERSION }} ; then
@@ -225,7 +215,7 @@ jobs:
       with:
         distribution: goreleaser
         version: 2.1.0
-        args: release --clean --timeout 60m --skip=validate --config=./.goreleaser.yaml --release-notes=${{ env.RELEASE_NOTES_FILE }}
+        args: release --clean --timeout 60m --skip=validate --config=.github/config/goreleaser.yaml --release-notes=${{ env.RELEASE_NOTES_FILE }}
       env:
         GITHUBORG: ${{ github.repository_owner }}
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -240,7 +230,7 @@ jobs:
       run: make plain-push
 
     - name: Create Release Branch
-      if: inputs.release_candidate == false && inputs.create_branch
+      if: inputs.release_candidate == false && github.ref == 'refs/heads/main'
       run: |
         n="releases/${{env.RELEASE_VERSION}}"
         git checkout -b "$n"
@@ -262,6 +252,16 @@ jobs:
         git push origin ${GITHUB_REF#refs/heads/}
         echo "Next branch version is $v"
 
+    - name: Delete Older Release Branches
+      if: github.ref == 'refs/heads/main'
+      run: |
+        set -e
+        git fetch --prune
+        for branch in $(git branch -r | grep 'origin/releases/' | grep -v 'origin/releases/${{ env.RELEASE_VERSION }}'); do
+          branch_name=$(echo $branch | sed 's|origin/||')
+          echo "Deleting branch $branch_name"
+        done
+
     - name: Publish Release Event
       if: inputs.release_candidate == false
       uses: peter-evans/repository-dispatch@v3