#!/usr/bin/env bash
# git-sync.sh - pull changes and run deploy.sh if updated
set -euo pipefail

REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "${REPO_DIR}"

git fetch --all --prune

UPDATED=0
if git rev-parse --abbrev-ref --symbolic-full-name @{u} >/dev/null 2>&1; then
  LOCAL="$(git rev-parse @)"
  REMOTE="$(git rev-parse @{u})"
  if [ "${LOCAL}" != "${REMOTE}" ]; then
    UPDATED=1
  fi
else
  out="$(git pull --rebase 2>&1 || true)"
  if ! echo "${out}" | grep -q "Already up"; then
    UPDATED=1
  fi
fi

if [ "${UPDATED}" -eq 1 ]; then
  echo "$(date -Iseconds) Repo updated -> running deploy.sh"
  "${REPO_DIR}/deploy.sh"
else
  echo "$(date -Iseconds) Repo unchanged"
fi