bundle-bot/bundle-bot-mirror.sh

#!/bin/bash

# requires: eepget, i2psnark (directory access), logger
# if ran as root (you shouldn't!) owner/group for the copied file 
# will be set (copied from i2psnark dir). 
# otherwise the executing user + the i2p user both need 
# read+write permissions on i2psnark/

SCRIPT_NAME="bundle-bot-mirror"
PATH_WORK_DIR="/home/bundle-bot/$SCRIPT_NAME"
#FILE_BUNDLE_BOT_I2P_LATEST="bundle-bot-mirror.i2p.i2p.latest"
FILE_BUNDLE_BOT_I2P_CURRENT="$SCRIPT_NAME.i2p.i2p.current"
FILE_BUNDLE_BOT_I2P_OLD="$SCRIPT_NAME.i2p.i2p.old"
FILE_LOCK="$PATH_WORK_DIR/$SCRIPT_NAME.LOCK"
FILE_LOG="$PATH_WORK_DIR/$SCRIPT_NAME.log"
LOGFACILITY="daemon"
LOGTAG=$SCRIPT_NAME

# Start logging all output
exec  1>$FILE_LOG 2>&1
# Log start
logger -s -t $LOGTAG -p $LOGFACILITY.notice "Starting run ..."

if [ -f $FILE_LOCK ]; then
  logger -s -t $LOGTAG -p $LOGFACILITY.error "ERROR: lock-file existed during startup - investigate!"
  exit 110
else
  touch $FILE_LOCK
fi

if [ -z "$PATH_I2PSNARK" ]; then
  if [ -d "$HOME/.i2p/i2psnark" ]; then
    PATH_I2PSNARK="$HOME/.i2p/i2psnark"
    USER_I2PSNARK=`stat -c "%U" $PATH_I2PSNARK`
    GROUP_I2PSNARK=`stat -c "%G" $PATH_I2PSNARK`
  elif [ -d "$HOME/i2p/i2psnark" ]; then
    PATH_I2PSNARK="$HOME/i2p/i2psnark"
    USER_I2PSNARK=`stat -c "%U" $PATH_I2PSNARK`
    GROUP_I2PSNARK=`stat -c "%G" $PATH_I2PSNARK`
  elif [ -d "/var/lib/i2p/i2p-config/i2psnark" ]; then
    PATH_I2PSNARK="/var/lib/i2p/i2p-config/i2psnark"
    USER_I2PSNARK=`stat -c "%U" $PATH_I2PSNARK`
    GROUP_I2PSNARK=`stat -c "%G" $PATH_I2PSNARK`
  else
    # let's assume this is critical and NOT remove the lock-file
    logger -s -t $LOGTAG -p $LOGFACILITY.error "I2PSnark directory not found or not accessible (permissions?). Manual internvetion necessary!"
    exit 123
  fi
fi
logger -s -t $LOGTAG -p $LOGFACILITY.notice "I2PSnark directory found at: $PATH_I2PSNARK and user/group set to $USER_I2PSNARK/$GROUP_I2PSNARK."

cd $PATH_WORK_DIR

eepget -n 5 http://ae5rbez5qu54o3lt7iczg56bmwvicpymj7al2riuhvogdllz554q.b32.i2p/torrents/

if [ $? -ne 0 ]; then
  logger -s -t $LOGTAG -p $LOGFACILITY.notice "Retrieving the torrent list failed :("
  rm $FILE_LOCK
  exit 1
fi

awk '
  BEGIN {
    FS = "."
    i2p_i2p_max_a=0
    i2p_i2p_max_b=0
    i2p_i2p_max_c=0
  }

(/i2p\.i2p\.i2p-[0-9]\.[0-9]\.[0-9]\.bundle\.torrent$/) { 
#  print substr($3,5) " " $4 " " $5 ;
  
  in_a=substr($3,5);
  in_b=$4;
  in_c=$5;
  
  if (in_a > i2p_i2p_max_a) {
    i2p_i2p_max_a = in_a;
    i2p_i2p_max_b = in_b;
    i2p_i2p_max_c = in_c;
    next;
  } else if ((in_a == i2p_i2p_max_a) && (in_b > i2p_i2p_max_b)) {
    i2p_i2p_max_a = in_a;
    i2p_i2p_max_b = in_b;
    i2p_i2p_max_c = in_c;
    next;
  } else if ((in_a == i2p_i2p_max_a) && (in_b == i2p_i2p_max_b) && (in_c > i2p_i2p_max_c)) {
    i2p_i2p_max_a = in_a;
    i2p_i2p_max_b = in_b;
    i2p_i2p_max_c = in_c;
    next;
  }
  next;
}

  END {
#    print "latest version i2p.i2p: " i2p_i2p_max_a "." i2p_i2p_max_b "." i2p_i2p_max_c;
    print "i2p.i2p.i2p-" i2p_i2p_max_a "." i2p_i2p_max_b "." i2p_i2p_max_c ".bundle.torrent" > "bundle-bot-mirror.i2p.i2p.latest" ;
  }
' torrents
# TODO: hardcoded bundle-bot-mirror.i2p.i2p.latest should be a variable (previous line inside awk, following line in cat)
TORRENT_LATEST=`cat bundle-bot-mirror.i2p.i2p.latest`
logger -s -t $LOGTAG -p $LOGFACILITY.notice "Latest online version: $TORRENT_LATEST"

if [ -f "$FILE_BUNDLE_BOT_I2P_CURRENT" ]; then
  TORRENT_CURRENT=`cat $FILE_BUNDLE_BOT_I2P_CURRENT`
  logger -s -t $LOGTAG -p $LOGFACILITY.notice "Our current version: $TORRENT_CURRENT"

  if [ $TORRENT_CURRENT = $TORRENT_LATEST ]; then
    logger -s -t $LOGTAG -p $LOGFACILITY.notice "No new version! Exiting."
    rm $FILE_LOCK
    exit 0
  else
    logger -s -t $LOGTAG -p $LOGFACILITY.notice "New version available, attempting to retrieve ..."
  fi
else
  logger -s -t $LOGTAG -p $LOGFACILITY.notice "We have no current version, yet (first-time-run). Attempting to get the latest online version  ..."
fi

eepget -n 5 http://ae5rbez5qu54o3lt7iczg56bmwvicpymj7al2riuhvogdllz554q.b32.i2p/torrents/$TORRENT_LATEST
if [ $? -eq 0 ]; then

  logger -s -t $LOGTAG -p $LOGFACILITY.notice "Successfully retrieved the .torrent for the latest online version"

  # if current exists, move it to old
  if [ -f "$FILE_BUNDLE_BOT_I2P_CURRENT" ]; then
    logger -s -t $LOGTAG -p $LOGFACILITY.notice "Removing (possibly existing) old version, copying current to old, and finally replacing current with new"
		
		# if old exists, delete it (in WORK_DIR + I2PSNARK)
		if [ -f "$FILE_BUNDLE_BOT_I2P_OLD" ]; then
			TORRENT_OLD=`cat $FILE_BUNDLE_BOT_I2P_OLD`
			# TODO delete old downloaded file here automatically?
			rm --force $PATH_I2PSNARK/$TORRENT_OLD
			rm --force $TORRENT_OLD
    fi
    mv --force $FILE_BUNDLE_BOT_I2P_CURRENT $FILE_BUNDLE_BOT_I2P_OLD
  fi

  # now store the latest name as our new current
  echo $TORRENT_LATEST > $FILE_BUNDLE_BOT_I2P_CURRENT
  
  # finally copy the new file to the i2psnark directory
  cp $TORRENT_LATEST $PATH_I2PSNARK
  if [ $? -eq 0 ]; then
    logger -s -t $LOGTAG -p $LOGFACILITY.notice "Successfully copied the .torrent to i2psnark."

    if [ "`whoami`" = "root" ]; then
      logger -s -t $LOGTAG -p $LOGFACILITY.notice "I am groot. Setting owner/group of file ..."
      chown $USER_I2PSNARK:$GROUP_I2PSNARK $PATH_I2PSNARK/`cat $FILE_BUNDLE_BOT_I2P_CURRENT`
    fi

  else
    logger -s -t $LOGTAG -p $LOGFACILITY.error "ERROR: Copying .torrent to i2psnark failed :("
    # let's assume this is critical and NOT remove the lock-file
    exit 2
  fi
else
  logger -s -t $LOGTAG -p $LOGFACILITY.notice "FAILED: Download of .torrent unsuccessfull :("
  rm $FILE_LOCK
  exit 1
fi

logger -s -t $LOGTAG -p $LOGFACILITY.notice "exiting normally after a (technically) successfull run."
rm $FILE_LOCK
exit