A quick script to help run the Mercurial AutoSync Extension (bitbucket.org/obensonne/hg-autosync/wiki/Home) in daemon mode. This is useful for situations where someone wants to manage AutoSync's lifecycle, including stopping the service; an example might be within a virtualenv's activate script.

mq-autosync.sh

#!/bin/sh

_echo_usage_and_abort() {
  echo "Usage: $0 {start|stop} [interval]"
  exit 1
}

if [[ ! -d '.hg' ]]; then
  cat <<EOM
This directory does not appear to be a mercurial repository. Try running this
script within the repository root (containing the .hg directory).
EOM
  exit 3
fi

if [[ -z "$1" ]]; then
  _echo_usage_and_abort
fi

PID_FILE='.hg/mq-autosync.pid'

AUTOSYNC_ARGS="$AUTOSYNC_ARGS -AD --mq --pid-file $PID_FILE"
if [[ ! -z $2 ]]; then
  AUTOSYNC_ARGS="$AUTOSYNC_ARGS -i $2"
fi

_kill_autosync() {
  if [[ -f $PID_FILE ]]; then
    PID=`cat $PID_FILE`
    if ps -l $PID > /dev/null 2>&1 ; then
      echo "Killing autosync, pid: $PID"
      kill `cat $PID_FILE`
    fi
    rm -f $PID_FILE
  fi
}

_start() {
  _kill_autosync
  hg autosync $AUTOSYNC_ARGS
}

_stop() {
  if [[ ! -f $PID_FILE ]]; then
    echo 'PID file does not exist, is autosync running?'
    exit 2
  fi
  _kill_autosync
}

case $1 in
  start)
    _start
    ;;
  stop)
    _stop
    ;;
  *)
    _echo_usage_and_abort
    ;;
esac