#!/usr/bin/env bash

# - Process command line
GIT_REPO_BRANCH="production"
while [ $# -gt 0 ]; do
  case "$1" in
    -h|--help)
      echo "Usage: $0 [--branch <branch name>]"
      exit 0
      ;;
    --branch)
      shift 1
      if [ $# -eq 0 ] ; then echo "$0: ERROR - Branch not specified." ; exit 1 ; fi
      GIT_REPO_BRANCH="$1"
      shift 1
      ;;
    --)
      shift 1
      break
      ;;
    *)
      echo "$0: ERROR - Invalid argument." ; exit 2
      ;;
  esac
done

# - Include ansible virtual environment (in case not already done - we don't know how we're being run)
VIRTUAL_ENV_DISABLE_PROMPT=true
. "${HOME}/.ansible-venv/bin/activate"

SCRIPT_NAME="$(basename "${0}")"
GIT_REPO_BASE="https://gitea.admin-a.hpetersenfamily.com/heath/ansible"
GIT_REPO="${GIT_REPO_BASE}.git"
LOG_DIR="/var/log/ansible-pull.sh"
LOG_FILE="${LOG_DIR}/ansible-pull.sh.log"
LOCK_FILE="/tmp/ansible-pull.sh.lock"

#???????????????????????????????? change the following to lock the log file?

# - If we can't lock the lock file, don't proceed
if ! exec 9>"${LOCK_FILE}" ; then echo "ERROR - Unable to open the lock file (${LOCK_FILE})! Exiting..." ; exit 10 ; fi
if ! flock -n 9 ; then echo "ERROR - Another copy of ${SCRIPT_NAME} is already running! Exiting..." ; exit 11 ; fi

# - Append all further STDOUT and STDERR to the log file
exec >>"${LOG_FILE}" 2>&1

# - Log that we've gotten this far
echo "$(basename "${0}"): $(date "+%Y-%m-%d %H:%M:%S")"

# - Do our work
ansible-pull --only-if-changed --url "${GIT_REPO}" --checkout "${GIT_REPO_BRANCH}" "${@}"