docker-sync osx_native unison repair

docker-sync--osx-native--repair.sh

#!/bin/bash

SYNC_CONTAINER="$1"

getLogfile () {
  echo "/tmp/$( docker exec "$SYNC_CONTAINER" ls /tmp/ | grep ^unison-stdout-- )"
}

if [ $# -lt 1 ]; then
  >&2 echo "Error: an argument with the docker-sync container name must be passed"
  exit 1
elif [ $# -gt 1 ]; then
  >&2 echo "Error: only one argument with the docker-sync container name must be passed"
  exit 1
fi

if ! $( docker container ps | tail -n +2 | awk '{print $NF}' | grep -q "$SYNC_CONTAINER" ); then
  >&2 echo "Error: docker-sync container '$SYNC_CONTAINER' is not running"
  exit 1
fi

echo "Killing Unison for docker-sync: $SYNC_CONTAINER"

# Clear Unison log file so we can detect when sync is complete
if $( docker exec "$SYNC_CONTAINER" ls /tmp/ | grep -q "^unison-stdout--" ); then
  LOGFILE=$( getLogfile )
  docker exec "$SYNC_CONTAINER" truncate -s 0 "$LOGFILE"
fi

PID=$( docker exec $SYNC_CONTAINER ps | grep ' unison ' | awk '{print $1}' )
docker exec "$SYNC_CONTAINER" kill -9 "$PID"
echo ''

# Just in-case the log file wasn't previously present... highly-unlikely
echo 'Waiting for Unison to start'
until $( docker exec "$SYNC_CONTAINER" ls /tmp/ | grep -q "^unison-stdout--" ); do
  echo -en '.'
  sleep 1
done
LOGFILE=$( getLogfile )
echo ''

echo 'Waiting for files to sync'
until $( docker exec "$SYNC_CONTAINER" cat "$LOGFILE" | grep -q "^Nothing to do" ); do
  echo -en '.'
  sleep 1
done
echo ''