[infinispan#2209] Add release labels to PRs

Co-authored-by: Tristan Tarrant <[email protected]>
Copied and adapted from infinispan/infinispan#13518

.github/workflows/label.yml

@@ -0,0 +1,22 @@
+name: Labeller
+
+on:
+  pull_request_target:
+    types: [closed]
+
+jobs:
+  label:
+    runs-on: ubuntu-latest
+    permissions:
+        contents: read
+        issues: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Add release labels on merge
+        run: ./scripts/ci/pr-label-issues.sh "${{ github.event.pull_request.number }}" "$GITHUB_REPOSITORY" "$GITHUB_BASE_REF" >> "$GITHUB_STEP_SUMMARY"
+        if: github.repository == 'infinispan/infinispan-operator' && github.event.pull_request.merged == true
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

scripts/ci/pr-find-issues.sh

@@ -0,0 +1,30 @@
+#!/bin/bash -e
+
+PR="$1"
+REPO="$2"
+
+if [ "$REPO" == "" ]; then
+    REPO="infinispan/infinispan-operator"
+fi
+
+function parse_issues() {
+    echo "$1" | grep -i -P -o "(close|closes|closed|resolve|resolves|resolved|fixes|fixed):? #[[:digit:]]*" | cut -d '#' -f 2 | sort -n
+}
+
+if [ "$PR" != "" ]; then
+    PR_JSON=$(gh api "/repos/$REPO/pulls/$PR")
+    PR_BODY=$(echo "$PR_JSON" | jq -r .body)
+    PR_MERGE_COMMIT_SHA=$(echo "$PR_JSON" | jq -r .merge_commit_sha)
+
+    ISSUES=$(parse_issues "$PR_BODY")
+    if [ "$ISSUES" == "" ]; then
+        COMMIT_JSON=$(gh api "/repos/$REPO/commits/$PR_MERGE_COMMIT_SHA")
+        COMMIT_MESSAGE=$(echo "$COMMIT_JSON" | jq -r .commit.message)
+
+        ISSUES=$(parse_issues "$COMMIT_MESSAGE")
+    fi
+
+    for i in $ISSUES; do
+        echo "$i"
+    done
+fi

scripts/ci/pr-label-issues.sh

@@ -0,0 +1,37 @@
+#!/bin/bash -e
+
+PR="$1"
+REPO="$2"
+REF="$3"
+
+echo "**Branch:** [$REF](https://github.com/$REPO/tree/$REF)"
+echo "**PR:** [$PR](https://github.com/$REPO/pull/$PR)"
+
+if [[ $REF == main ]]; then
+  LAST_RELEASE="$(gh api /repos/$REPO/branches --paginate --jq .[].name | grep -E '^[0-9]+\.[0-9]+\.x' | sort -n -r | head -n 1)"
+  LAST_MAJOR=$(echo "$LAST_RELEASE" | cut -d '.' -f 1)
+  LAST_MINOR=$(echo "$LAST_RELEASE" | cut -d '.' -f 2)
+
+  NEXT_MAJOR=$LAST_MAJOR
+  NEXT_MINOR="$(($LAST_MINOR + 1))"
+  LABEL="release/$NEXT_MAJOR.$NEXT_MINOR.0"
+  EXTRA_EDIT=""
+elif [[ $REF =~ ^[0-9]+\.[0-9]+\.x$ ]]; then
+  MAJOR_MINOR="$(echo $REF | cut -d . -f 1,2)"
+  LAST_MICRO="$(gh api /repos/$REPO/tags --jq .[].name | sort -V -r | grep $MAJOR_MINOR | head -n 1 | cut -d . -f 3)"
+  NEXT_MICRO="$(($LAST_MICRO + 1))"
+  LABEL="release/$MAJOR_MINOR.$NEXT_MICRO"
+  EXTRA_EDIT="--remove-label backport/$MAJOR_MINOR"
+fi
+
+echo "**Label:** [$LABEL](https://github.com/$REPO/labels/$LABEL)"
+
+gh api "/repos/$REPO/labels/$LABEL" --silent 2>/dev/null || gh label create -R "$REPO" "$LABEL" -c "0E8A16"
+
+echo "**Updating issues:**"
+
+ISSUES=$(./scripts/ci/pr-find-issues.sh "$PR" "$REPO")
+for ISSUE in $ISSUES; do
+  echo "* [$ISSUE](https://github.com/$REPO/issues/$ISSUE)"
+  gh issue edit "$ISSUE" -R "$REPO" --add-label "$LABEL" $EXTRA_EDIT
+done