#!/usr/bin/env bash

## - !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
## -
## - assuming your remote user is called "back", you have
## - to give sudoer rights to him as follow:
## -
## -    visudo (edits /etc/sudoers file)
## -
## - add line:
## -    back ALL = (root)NOPASSWD:/usr/bin/rsync
## -
## - on the remote database allow the congigured mysql user to
## - access the database from localhost an give him the follwing
## - privileges:
## -    Select_priv
## -    Lock_tables_priv
## -    Show_view_priv
## - 
## - INSERT INTO user (Host,User,Password,Select_priv,Lock_tables_priv,Show_view_priv) VALUES('localhost','backup',password('backup'),'Y','Y','Y');
## - FLUSH PRIVILEGES;
## - 
## - !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

err_Log=${LOCK_DIR}/svn.err.log
> $err_Log


## - load functions
## -
. $rcopy_functions_file

# --------------------------------------------------- #
# -------------------- Variable --------------------- #
#

_backupDestArchiveDir="${script_backup_dir}/Subversion"


if [ $srcHost != "localhost" ] || $_via_ssh_tunnel ;then
   svnadmin_bin=`$ssh ${ssh_user}@$srcHost which svnadmin`
   find=`$ssh ${ssh_user}@$srcHost which find`
   sudo=`$ssh ${ssh_user}@$srcHost which sudo`
   realpath=`$ssh ${ssh_user}@$srcHost which realpath`
   ssh_options="-o BatchMode=yes -o ConnectTimeout=360"
else
   svnadmin_bin=`which svnadmin`
fi

if [ -z "$svnadmin_bin" ]; then
  fatal "cannot find binary \"svnadmin\"" 
   
fi


#
# ------------------ Ende Variable ------------------ #
# --------------------------------------------------- #

if [ $srcHost != "localhost" ] || $_via_ssh_tunnel ;then
   _REPOSITORIES=`ssh ${ssh_user}@$srcHost "$sudo $find $svn_source_base_path -maxdepth 1 -type d -exec basename 'realpath {}' \;"`
else
   _REPOSITORIES=`find $svn_source_base_path -maxdepth 1 -type d -exec basename 'realpath {}' \;`
fi

for repos in $_REPOSITORIES ; do
   _dir=`basename $svn_source_base_path`
   [ "$repos" = "$_dir" ] && continue
   REPOSITORIES="$REPOSITORIES $repos"
done
   

echolog ""
if $ARCHIVE ;then


   ## - backup all svn repositories.
   ## -
   for i in $REPOSITORIES ; do
      filedate=`$date +"%Y-%m-%d-%H%M"`

      if [ "$destHost" = "localhost" ]; then
         if [ ! -d ${_backupDestArchiveDir}/${i} ] ; then 
            $mkdir -p ${_backupDestArchiveDir}/${i}
         fi
      fi
   
      ## - begin timestamp
      ## -
      b_timestamp=`$date +"%s"`

      info_msg="save svn repository $i.."
      echononl "\t$info_msg"
      if [ $srcHost != "localhost" ] || $_via_ssh_tunnel ;then
         $(
            $ssh $ssh_options ${ssh_user}@$srcHost "$sudo $svnadmin_bin dump $svn_source_base_path/$i 2> /dev/null" \
               > ${_backupDestArchiveDir}/${i}/${i}-${filedate}.svn 2> $err_Log
            exit $?
         )
         retval=$?
      else
         $(
            $sudo $svnadmin_bin dump $svn_source_base_path/$i 2> /dev/null \
               > ${_backupDestArchiveDir}/${i}/${i}-${filedate}.svn 2> $err_Log
            exit $?
         )
         retval=$?
      fi
      err_msg="Cannot save repository \"$i\""
      keep_backup_on_error=false

      if [ "$retval" = 0 ];then
         [ -z $svn_gzip ] && svn_gzip=false
         if $svn_gzip ; then
            $gzip ${_backupDestArchiveDir}/${i}/${i}-${filedate}.svn 2> $err_Log
            retval=$?
            err_msg="Cannot gzip repository \"$i\""
            keep_backup_on_error=true
         fi
      fi

      ## - end timestamp
      ## -
      e_timestamp=`$date +"%s"`

      ## - determin duration
      ## -
      _time=`expr $e_timestamp - $b_timestamp`
      t_h=`expr $_time / 60 / 60`
      t_rest_h=`expr $_time - $t_h \\* 60 \\* 60`
      t_m=`expr $t_rest_h / 60`
      t_s=`expr $t_rest_h - $t_m \\* 60`
      duration=""
      if [ $t_h -gt 0 ]; then
         duration="$t_h h : $t_m min : $t_s sec"
      elif [ $t_m -gt 0 ];then
         duration="$t_m min : $t_s sec"
      else
         duration="$t_s sec"
      fi

      ## - look about errors..
      ## -
      if [ "$retval" != "0" ]; then
         echolog ""
         echolog "\t[ERROR] ${err_msg}  [ $duration ]\n\t`$cat $err_Log`\n"
         if ! $keep_backup_on_error ; then
            rm -f ${_backupDestArchiveDir}/${i}/${i}-${filedate}.svn
         fi
         continue
      else

         ## - print durations right-aligned
         ## -
         [ -z $right_tabstop ] && right_tabstop=65
         _tmp_string="${info_msg}${duration}"
         _strlen=${#_tmp_string}
         _count_blank=`expr $right_tabstop - $_strlen`
         _str_blanks=""
         while [ $_count_blank -gt 1 ]; do
            _str_blanks="$_str_blanks "
            _count_blank=`expr $_count_blank - 1`
         done
         echononl "$_str_blanks"

         echolog "  [ $duration ]"
      fi
   done

else
   echolog "\tARCHIVE is set to $ARCHIVE. So nothing to do."   
fi
echolog ""


## - remove all files older than $days days..
## - 
$find $_backupDestArchiveDir -type f -mtime +${days} -exec rm {} \;