backupDir.bash

#!/usr/bin/env bash

START=$(date +%s.%N)

arg1=${1:-''}

if [[ $arg1 == '--help' || $arg1 == '-h' ]]; then
    echo "Backups the current directory or the specified directory into it's parent directory"
    exit 0
fi

#exit when command fails (use || true when a command can fail)
set -o errexit

#exit when your script tries to use undeclared variables
set -o nounset

# in scripts to catch mysqldump fails
set -o pipefail

# Set magic variables for current file & dir
__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"   # Dir of the script
__root="$(cd "$(dirname "${__dir}")" && pwd)"           # Dir of the dir of the script
__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"       # Full path of the script
__base="$(basename ${__file})"                          # Name of the script
ts=`date +'%Y%m%d-%H%M%S'`

#Set the config file
configFile="$HOME/.binJlam/templateConfig"

#Ensure only one copy is running
#pidfile=$HOME/.${__base}.pid
#if [ -f ${pidfile} ]; then
#   #verify if the process is actually still running under this pid
#   oldpid=`cat ${pidfile}`
#   result=`ps -ef | grep ${oldpid} | grep ${__base} || true`
#
#   if [ -n "${result}" ]; then
#     echo "Script already running! Exiting"
#     exit 255
#   fi
#fi
#
##grab pid of this process and update the pid file with it
#pid=`ps -ef | grep ${__base} | grep -v 'vi ' | head -n1 |  awk ' {print $2;} '`
#echo ${pid} > ${pidfile}

# Create trap for lock file in case it fails
#trap "rm -f $pidfile" INT QUIT TERM EXIT


#Capture everything to log
# mkdir -p ~/log
# log=~/log/$__base-${ts}.log
# exec >  >(tee -a $log)
# exec 2> >(tee -a $log >&2)
# touch $log
#chmod 600 $log


#Check that the config file exists
#if [[ ! -f "$configFile" ]] ; then
#        echo "I need a file at $configFile with ..."
#        exit 1
#fi

export DISPLAY=:0

echo Begin `date`  .....

echo; echo; echo;

### BEGIN SCRIPT ###############################################################

#(a.k.a set -x) to trace what gets executed
#set -o xtrace

currentDir=`basename "$PWD"`
targetDir=${1:-}
parentPath=''

if [[ -z $targetDir ]]; then
    targetDir="$currentDir"
    parentPath='../'
    cd ..
else
    cd .
fi

targetGZ="$targetDir".$ts.tar.gz
echo Compressing $targetDir into $parentPath$targetGZ
echo

total_size=$(du -s "${targetDir}" | cut -f 1) || true
if [[ ! -z "$total_size" ]] ; then
  echo Total size is $total_size
  tar -cO "$targetDir" | pv -s "${total_size}"k | gzip -9v > "$targetGZ"
else
  tar --ignore-failed-read -cO "$targetDir" | gzip -9v > "$targetGZ"
fi

echo
ls -lhtd "$targetDir"*
echo

cd -

echo


### END SCIPT ##################################################################

END=$(date +%s.%N)
DIFF=$(echo "round($END - $START)" | bc)
echo; echo; echo;
echo Done.  `date` - $DIFF seconds

#if [ -f ${pidfile} ]; then
#    rm ${pidfile}
#fi