Updated on 2026-08-14

ci_resources/find-latest-pre-release-branch.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+set -eo pipefail
+
+# Input args
+if [ -z "$1" ]; then
+  echo "Error: No base branch argument provided or empty string given."
+  echo "Usage: $0 <base-branch>"
+  exit 1
+fi
+base_branch=$1
+
+# Initialize variables to store the latest release branch and merge base
+latest_branch=""
+latest_merge_base=""
+
+# Source refs to find branches from
+local_refs="refs/heads/releases/*"  # For debug and development
+remote_refs=$(git for-each-ref --format="%(refname:short)" refs/remotes/origin/ | grep -E "origin/[a-zA-Z0-9._-]+_pre_release$")
+
+# Iterate over all remote release branches sorted by commit date (most recent first)
+for branch in $remote_refs; do
+    merge_base=$(git merge-base "$base_branch" "$branch")
+
+    echo "Merge base for branches '$branch' and '$base_branch' is '$merge_base'"
+
+    if [ -z "$latest_merge_base" ] || git rev-list "$merge_base..$base_branch" | grep -q .; then
+        echo "Update"
+        latest_branch="$branch"
+        latest_merge_base="$merge_base"
+    fi
+done
+
+echo "Latest branch: $latest_branch"
+echo "Latest merge base: $latest_merge_base"
+
+
+# Output validation
+if [ -z "$latest_branch" ]; then
+  echo "Error: Can't find the latest 'pre_release' branch for the base branch '$base_branch'"
+  exit 2
+fi
+
+# Stripping 'origin/' prefix if needed
+latest_branch="${latest_branch#origin/}"
+
+echo "$latest_branch" > "find-latest-pre-release-branch.output"
+echo "Latest release branch created directly from '$base_branch' or its ancestor: '$latest_branch'"