sync.sh

#!/bin/bash

[ -e `dirname $0`/../global/global.inc.sh ] && . `dirname $0`/../global/global.inc.sh

# config parameters
. `dirname $0`/sync.conf || { echo "Error loading config file" >&2; exit 1; }

# default sync function
sync_directory() {
    # sync
    $SYNC_COMMAND $OPTS $OPTS_DIR "$ROOT_DIR"/ "$SYNC_DEST"
}

sync_file() {
    # change to directory so we can sync with relative path (--relative parameter of rsync)
    cd "$ROOT_DIR"
    # sync
    $SYNC_COMMAND $OPTS $OPTS_FILE "$FILE" "$SYNC_DEST"
}

cleanup_empty_directories() {
    # cleanup all empty directories except newest (usually the latest/current raspistill directory)
    ls -d1 "$ROOT_DIR"/*/ | grep -E '[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}\.[0-9]{2}\.[0-9]{2}' | head -n-1 | xargs --no-run-if-empty --delim '\n' rmdir --ignore-fail-on-non-empty
}

# overwrite sync function with own implementation
[ -e `dirname $0`/sync.inc.sh ] && . `dirname $0`/sync.inc.sh

# Locking
[ -e `dirname $0`/../global/bash-locking.inc.sh ] && . `dirname $0`/../global/bash-locking.inc.sh

#### 
logrotate

exec >> $LOG
exec 2>> $LOG

# if used with inotify 
## first parameter is the watched directory
## the second the relative path to the file
# if used as batch cronjob
## first parameter is the directory to sync recursively
# strip trailing slashes
ROOT_DIR=`realpath "$1"`
FILE="$2"

if [ $# -eq 1 ] && [ -d "$ROOT_DIR" ]
then
    sync_directory
elif [ $# -eq 2 ] && [ -e "$ROOT_DIR"/"$FILE" ]
then
    sync_file
fi

# rsync doesn't delete empty directories
cleanup_empty_directories