ayagmar commented on code in PR #14738:
URL: https://github.com/apache/lucene/pull/14738#discussion_r2899935507
##########
.github/workflows/backport.sh:
##########
@@ -0,0 +1,229 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+echo "📊 Fetching PR data..."
+PR_DATA=$(gh pr view "$PR_NUMBER" --json labels,milestone,title)
+PR_LABELS=$(echo "$PR_DATA" | jq -r '.labels[].name |
select(test("^backport/"; "i"))')
+PR_MILESTONE=$(echo "$PR_DATA" | jq -r '.milestone.title // ""')
+PR_TITLE=$(echo "$PR_DATA" | jq -r '.title // "Unknown title"')
+PR_MERGE_COMMIT_SHA="${PR_MERGE_COMMIT_SHA:-unknown}"
+DRY_RUN="${BACKPORT_DRY_RUN:-true}"
+
+normalize_version() {
+ local raw="$1"
+ local trimmed
+ local normalized=""
+ trimmed=$(echo "$raw" | sed -E 's/^[[:space:]]+|[[:space:]]+$//g')
+ if [[ $trimmed =~ ([0-9]+(\.[0-9]+)*) ]]; then
+ normalized="${BASH_REMATCH[1]}"
+ fi
+ echo "$normalized"
+}
+
+is_valid_sha() {
+ local sha="$1"
+ [[ "$sha" =~ ^[0-9a-f]{7,40}$ ]]
+}
+
+create_comment() {
+ if [ "$DRY_RUN" = "true" ]; then
+ echo "[dry-run] Would comment on PR #$PR_NUMBER:"
+ echo "$1"
+ return 0
+ fi
+ gh pr comment "$PR_NUMBER" --body "$1"
+}
+
+add_label() {
+ if [ "$DRY_RUN" = "true" ]; then
+ echo "[dry-run] Would add label '$1' on PR #$PR_NUMBER"
+ return 0
+ fi
+ gh pr edit "$PR_NUMBER" --add-label "$1" 2>/dev/null || true
+}
+
+publish_outputs() {
+ local has_targets="$1"
+ local targets_json="$2"
+
+ if [ -n "${GITHUB_OUTPUT:-}" ]; then
+ {
+ echo "dry_run=$DRY_RUN"
+ echo "has_targets=$has_targets"
+ echo "targets<<EOF"
+ echo "$targets_json"
+ echo "EOF"
+ } >> "$GITHUB_OUTPUT"
+ fi
+}
+
+if [ -z "$PR_LABELS" ] && [ -z "$PR_MILESTONE" ]; then
+ echo "ℹ️ No backport labels or milestone found. Nothing to do."
+ publish_outputs "false" "[]"
+ exit 0
+fi
+
+if [ "$DRY_RUN" != "true" ] && ! is_valid_sha "$PR_MERGE_COMMIT_SHA"; then
+ create_comment "❌ **Automatic backports skipped**
+
+Invalid merge commit SHA was provided by workflow context:
\`$PR_MERGE_COMMIT_SHA\`.
+
+Backports are skipped for safety."
+ add_label "backport-failed"
+ publish_outputs "false" "[]"
+ exit 0
+fi
+
+echo "🏷️ Ensuring backport labels exist..."
+if [ "$DRY_RUN" = "true" ]; then
+ echo "[dry-run] Skipping label creation"
+else
+ gh label create "backport" --description "Automated backport workflow"
--color "0366d6" 2>/dev/null || true
+ gh label create "backport-failed" --description "Backport failed" --color
"d73a49" 2>/dev/null || true
+fi
+
+echo "🌿 Caching branch information..."
+ALL_BRANCHES=$(git for-each-ref --format='%(refname:strip=3)'
refs/remotes/origin | grep -v '^HEAD$' | sort)
+declare -ra TARGET_BRANCH_TEMPLATES=(
Review Comment:
they're not, nice catch!
I trimmed the resolver to Lucene’s branch conventions only:
- `branch_<major>x`
- `branch_<major>_<minor>`
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