#!/bin/ksh

out=~fcm/FCM/daily_cron.out
svn_live=/data/local/fcm/svn/live
svn_backup=~fcm/svn/backups
svn_tmp=/var/tmp/fcm/svn/backups
svn_dump=~fcm/svn/dumps
trac_live=~fcm/trac/live
trac_backup=~fcm/trac/backups
trac_tmp=/var/tmp/fcm/trac/backups
err=''

export RSYNC_RSH=rsh # remote shell for "rsync"

{

  # Verify and backup Subversion repository database
  # ----------------------------------------------------------------------------
  cd $svn_live
  tmpfile=/tmp/${USER}.$$
  now=$(date +%s)
  for dir in *; do
    if [[ ! -d $dir ]]; then continue; fi

    # Verify
    # --------------------------------------------------------------------------
    echo "$(date): Verifying $dir ..."
    sed '/^\* Verified revision [0-9][0-9]*\./d'<<EOF
$(svnadmin verify $dir 2>&1; echo $? > $tmpfile)
EOF
    RC=$(cat $tmpfile)

    if ((RC != 0)); then
      err="${err}Error in $dir repository integrity. "
      continue
    fi

    # Backup
    # --------------------------------------------------------------------------
    # Create the temporary backup location if it does not exists
    if [[ ! -d $svn_tmp ]]; then
      mkdir -p $svn_tmp

      if (($? != 0)); then
        err="${err}Error creating $svn_tmp. "
        break
      fi
    fi

    # Hotcopy to temporary location
    tmp_backup_dir=$svn_tmp/$dir
    echo "$(date): Hotcopying $dir SVN repository to $tmp_backup_dir ..."
    svnadmin hotcopy $dir $tmp_backup_dir

    if (($? != 0)); then
      err="${err}Error hotcopying $dir SVN repository to $tmp_backup_dir. "
      continue
    fi

    # Create the backup location if it does not exists
    if [[ ! -d $svn_backup ]]; then
      mkdir -p $svn_backup

      if (($? != 0)); then
        err="${err}Error creating $svn_backup. "
        break
      fi
    fi

    # Tar and gzip the backup
    new_backup=$svn_backup/$dir.$(date +%Y%m%d).tgz
    echo "$(date): Creating tar archive in $new_backup ..."
    tar -C $svn_tmp -c -z -f $new_backup $(basename $tmp_backup_dir)

    if (($? != 0)); then
      err="${err}Error creating tar archive in $new_backup. "
      continue
    fi

    # Remove the temporary hotcopy
    rm -rf $tmp_backup_dir

    if (($? != 0)); then
      err="${err}Error removing $tmp_backup_dir. "
    fi

    # Remove the old backup, if necessary
    backup=$svn_backup/$dir.tgz

    if [[ -f $backup ]]; then
      rm -f $backup

      if (($? != 0)); then
        err="${err}Error removing old copy of $backup. "
        continue
      fi
    fi

    # Move today's backup to the final location
    echo "$(date): Renaming $new_backup to $backup ..."
    mv $new_backup $backup

    if (($? != 0)); then
      err="${err}Error renaming $new_backup to $backup. "
    fi

    # Housekeep the revision dumps
    # --------------------------------------------------------------------------
    if [[ -d $svn_dump/$dir ]]; then
      # Keep dumps created in the last 3 days
      echo "$(date): Housekeeping dumps in $svn_dump/$dir ..."

      cd $svn_dump/$dir
      for rev in *; do
        # Check that $rev is a regular file
        if [[ ! -f $rev ]]; then
          continue
        fi

        # 3 days = 24 * 60 * 60 * 3 = 259200 seconds
        if (($now - $(stat -c %Y $rev) > 259200)); then
          echo "$(date): Removing $svn_dump/$dir/$rev ..."
          rm -f $rev
          if (($? != 0)); then
            err="${err}Error removing dump $svn_dump/$dir/$rev. "
          fi
        fi
      done

      cd $OLDPWD
    fi
  done

  # Backing up Trac systems
  # ----------------------------------------------------------------------------
  cd $trac_live
  for dir in *; do
    if [[ ! -d $dir ]]; then continue; fi

    # Backup
    # --------------------------------------------------------------------------
    # Create the temporary backup location if it does not exists
    if [[ ! -d $trac_tmp ]]; then
      mkdir -p $trac_tmp

      if (($? != 0)); then
        err="${err}Error creating $trac_tmp. "
        break
      fi
    fi

    # Hotcopy to temporary location
    tmp_backup_dir=$trac_tmp/$dir
    echo "$(date): Hotcopying $dir Trac system to $tmp_backup_dir ..."
    trac-admin $dir hotcopy $tmp_backup_dir

    if (($? != 0)); then
      err="${err}Error hotcopying $dir Trac system to $tmp_backup_dir. "
      continue
    fi

    # Create the backup location if it does not exists
    if [[ ! -d $trac_backup ]]; then
      mkdir -p $trac_backup

      if (($? != 0)); then
        err="${err}Error creating $trac_backup. "
        break
      fi
    fi

    # Tar and gzip the backup
    new_backup=$trac_backup/$dir.$(date +%Y%m%d).tgz
    echo "$(date): Creating tar archive in $new_backup ..."
    tar -C $trac_tmp -c -z -f $new_backup $(basename $tmp_backup_dir)

    if (($? != 0)); then
      err="${err}Error creating tar archive in $new_backup. "
      continue
    fi

    # Remove the temporary hotcopy
    rm -rf $tmp_backup_dir

    if (($? != 0)); then
      err="${err}Error removing $tmp_backup_dir. "
    fi

    # Rename backups on success
    # --------------------------------------------------------------------------
    # Shift backup "1" to backup "2", and then backup "0" to backup "1"
    for i in 1 0; do
      old_file=$trac_backup/$dir.$i.tgz
      new_file=$trac_backup/$dir.$((i + 1)).tgz

      # Check if move is necessary
      if [[ ! -f $old_file ]]; then
        continue
      fi

      if [[ -f $new_file ]]; then
        echo "$(date): Removing $new_file ..."
        rm -f $new_file

        if (($? != 0)); then
          err="${err}Error removing $new_file. "
          break
        fi
      fi

      echo "$(date): Renaming $old_file to $new_file ..."
      mv $old_file $new_file
      if (($? != 0)); then
        err="${err}Error renaming $old_file. "
        break
      fi
    done

    # Move today's backup to "0", if possible
    backup=$trac_backup/$dir.0.tgz
    if [[ ! -f $backup ]]; then
      echo "$(date): Renaming $new_backup to $backup ..."
      mv $new_backup $backup
      if (($? != 0)); then
        err="${err}Error renaming $new_backup to $backup. "
      fi
    fi
  done

  # Update the Trac password file and databases with latest login information
  # ----------------------------------------------------------------------------
  echo "$(date): Updating password files and Trac databases ..."
  $(dirname $0)/fcm_manage_login.py
  if (($? != 0)); then
    err="${err} Error updating Trac password file and databases. "
  fi

  # Sync the working copy to the NEC
  # ----------------------------------------------------------------------------
  echo "$(date): Updating NEC ..."
  rsync -a -v --timeout=1800 --exclude='.*' --exclude='FCM/doc' \
    --delete-excluded ~/FCM/work/FCM fcm@tx01:~/FCM/work
  if (($? != 0)); then
    err="${err}Error updating NEC. "
  fi

  # Update "synch" path from "synch" machine
  # ----------------------------------------------------------------------------
  echo "$(date): Updating synch machine ..."
  for subdir in bin lib etc; do
    rsync -a -v --timeout=1800 --exclude='.*' ~/FCM/work/FCM/src/$subdir/* \
      fcm@hc0100:/opt/ukmo/utils/supported/portable/$subdir/

    if (($? != 0)); then
      err="${err}Error updating $subdir/ on synch machine. "
    fi
  done

  # Final report
  # ----------------------------------------------------------------------------
  if [[ -n $err ]]; then
    subject="$(basename $0) finished with errors: $err"

  else
    subject="$(basename $0) finished normally."
  fi

  echo "$(date): $subject"
} 1>$out 2>&1

# Report completion via e-mail
# ------------------------------------------------------------------------------
mail -s "$subject" my.name@somewhere.org <<EOF
$(<$out)
EOF

# EOF