#!/usr/bin/env bash
# Read-only nightly source update check; run as seth for SSH aliases.
set -euo pipefail

REPOS=(
  "/opt/gha-runners/kc/KC-GHA-Runner"
  "/opt/gha-runners/dfair"
  "/opt/gha-runners/kc-timing/KC-Timing-Runner"
)

for repo in "${REPOS[@]}"; do
  name=$(basename "$repo")
  echo "========================================"
  echo "Checking runner: $name"
  echo "Repository: $repo"

  if ! git -C "$repo" fetch --quiet origin main; then
    echo "ERROR: Failed to fetch origin/main for $name"
    exit 1
  fi

  local_sha=$(git -C "$repo" rev-parse HEAD)
  remote_sha=$(git -C "$repo" rev-parse refs/remotes/origin/main)

  if [[ "$local_sha" == "$remote_sha" ]]; then
    echo "UP TO DATE: ${local_sha:0:12}"
  elif git -C "$repo" merge-base --is-ancestor HEAD origin/main; then
    echo "UPDATE AVAILABLE"
    echo "Local:  ${local_sha:0:12}"
    echo "Remote: ${remote_sha:0:12}"
    git -C "$repo" log --oneline HEAD..origin/main
  else
    echo "WARNING: Local and remote branches have diverged."
    echo "Local:  ${local_sha:0:12}"
    echo "Remote: ${remote_sha:0:12}"
  fi
done