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bootstrap/rails/git/pr-merge.sh
2026-02-21 09:55:34 -06:00

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#!/bin/bash
# pr-merge.sh - Merge pull requests on Gitea or GitHub
# Usage: pr-merge.sh -n PR_NUMBER [-m squash] [-d] [--skip-queue-guard]
set -e
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/detect-platform.sh"
# Default values
PR_NUMBER=""
MERGE_METHOD="squash"
DELETE_BRANCH=false
SKIP_QUEUE_GUARD=false
usage() {
cat <<EOF
Usage: $(basename "$0") [OPTIONS]
Merge a pull request on the current repository (Gitea or GitHub).
Options:
-n, --number NUMBER PR number to merge (required)
-m, --method METHOD Merge method: squash only (default: squash)
-d, --delete-branch Delete the head branch after merge
--skip-queue-guard Skip CI queue guard wait before merge
-h, --help Show this help message
Examples:
$(basename "$0") -n 42 # Merge PR #42
$(basename "$0") -n 42 -m squash # Squash merge
$(basename "$0") -n 42 -d # Squash merge and delete branch
$(basename "$0") -n 42 --skip-queue-guard # Skip queue guard wait
EOF
exit 1
}
# Parse arguments
while [[ $# -gt 0 ]]; do
case $1 in
-n|--number)
PR_NUMBER="$2"
shift 2
;;
-m|--method)
MERGE_METHOD="$2"
shift 2
;;
-d|--delete-branch)
DELETE_BRANCH=true
shift
;;
--skip-queue-guard)
SKIP_QUEUE_GUARD=true
shift
;;
-h|--help)
usage
;;
*)
echo "Unknown option: $1" >&2
usage
;;
esac
done
if [[ -z "$PR_NUMBER" ]]; then
echo "Error: PR number is required (-n)" >&2
usage
fi
if [[ "$MERGE_METHOD" != "squash" ]]; then
echo "Error: Mosaic policy enforces squash merge only. Received '$MERGE_METHOD'." >&2
exit 1
fi
BASE_BRANCH="$("$SCRIPT_DIR/pr-metadata.sh" -n "$PR_NUMBER" | python3 -c 'import json, sys; print((json.load(sys.stdin).get("baseRefName") or "").strip())')"
if [[ "$BASE_BRANCH" != "main" ]]; then
echo "Error: Mosaic policy allows merges only for PRs targeting 'main' (found '$BASE_BRANCH')." >&2
exit 1
fi
if [[ "$SKIP_QUEUE_GUARD" != true ]]; then
"$SCRIPT_DIR/ci-queue-wait.sh" \
--purpose merge \
-B "$BASE_BRANCH" \
-t "${MOSAIC_CI_QUEUE_TIMEOUT_SEC:-900}" \
-i "${MOSAIC_CI_QUEUE_POLL_SEC:-15}"
fi
PLATFORM=$(detect_platform)
case "$PLATFORM" in
github)
CMD="gh pr merge $PR_NUMBER --squash"
[[ "$DELETE_BRANCH" == true ]] && CMD="$CMD --delete-branch"
eval "$CMD"
;;
gitea)
# tea pr merge syntax
CMD="tea pr merge $PR_NUMBER --style squash"
# Delete branch after merge if requested
if [[ "$DELETE_BRANCH" == true ]]; then
echo "Note: Branch deletion after merge may need to be done separately with tea" >&2
fi
eval "$CMD"
;;
*)
echo "Error: Could not detect git platform" >&2
exit 1
;;
esac
echo "PR #$PR_NUMBER merged successfully"