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#!/bin/bash
#
# jail-commit: update config files from a jail to a template
# feedback: rhatto@riseup.net | gpl
#
#  Jail-commit is free software; you can redistribute it and/or modify it under the
#  terms of the GNU General Public License as published by the Free Software
#  Foundation; either version 2 of the License, or any later version.
#
#  Jail-commit is distributed in the hope that it will be useful, but WITHOUT ANY
#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
#  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License along with
#  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
#  Place - Suite 330, Boston, MA 02111-1307, USA
#

COMMON="/usr/libexec/simplepkg/common.sh"
BASENAME="`basename $0`"

if [ -f "$COMMON" ]; then
  source $COMMON
  eval_config $BASENAME
else
  echo "error: file $COMMON found, check your $BASENAME installation"
  exit 1
fi

function usage {

  echo $BASENAME: commit a jail configuration into a template
  echo "usage: \"$BASENAME [<jail-path> [template]]\""
  echo "       \"$BASENAME --all\" to commit all templates"
  echo "       \"$BASENAME --help\" for help"

}

function template_merge {

  # copy differences between the jail
  # and the template in the template folder

  # usage: template_merge <jail-path>

  if [ -z "$1" ] || [ ! -d "`template_files`" ]; then
    return 1
  fi

  echo "" > `template_perms`.tmp
  cd `template_files`

  for file in `find | grep -v -e "/.svn$" | grep -v -e "/.svn/" | grep -v -e  "^\.$"`; do

    if [[ -e "$file" && -e "$1/$file" ]]; then

      if [ ! -d "$file" ] && [ ! -h "$file" ]; then
        if ! diff -u $file $1/$file; then
          echo Updating $file
          cp -af $1/$file $file
        fi
      elif [ -h "$file" ]; then
        if [ "`readlink $file`" != "`readlink $1/$file`" ]; then
          rm -f $file
          ln -s `readlink $1/$file` $file
        fi
      fi

      perms="`numeric_perm $1/$file`"
      owner="`get_owner $1/$file`"
      group="`get_group $1/$file`"

      # secure the file
      chown root.root `template_files`/$file
      chmod $perms `template_files`/$file
      
      echo "$file;$owner;$group;$perms" >> `template_perms`.tmp

    else
      if [ ! -e "$1/$file" ]; then
        echo $BASENAME: warning: missing file `slash $1/$file`
      fi
    fi

  done

  cat `template_perms`.tmp | sed '/^$/d' > `template_perms`
  rm -f `template_perms`.tmp

  if templates_under_svn && ! svn_check `template_perms`; then
    svn add `template_perms`
  fi

}

function template_svn_commit {

  # issue a svn_commit from a template folder
  # usage: template_svn_commit <template-folder>

  if templates_under_svn && svn_folder $1; then
    cd $1
    echo First checking out from the repository...
    svn update
    echo Commiting changes to the repository...
    svn commit -m "changes for `date`"
    if [ "$?" != "0" ]; then
      echo $BASENAME: commit error
    fi
  fi

}

function do_commit {

  # commit jail changes to a repository
  # usage: do_commit <jailpath> [template]

  local jailpath template

  jailpath="$1"
  jail="`basename $jailpath`"

  if [ ! -z "$2" ]; then
    template="$2"
  else
    template="$jail"
  fi

  search_template $template --update
  if [ "$?" == "0" ] && ! echo "$TEMPLATE_UPDATE_LIST" | grep -q " `basename $TEMPLATE_BASE` "; then
    TEMPLATE_UPDATE_LIST=" $TEMPLATE_UPDATE_LIST `basename $TEMPLATE_BASE` " # the spaces are important
    if [ "$jailpath" == "/" ]; then
      echo Updating main installation...
    else
      echo Updating $jailpath...
    fi
    if [ -d "`template_files`" ] || [ -a "`template_packages`" ]; then
      SILENT=yes templatepkg -u $template $jailpath
      template_merge $jailpath
    fi
  else
    if [ -z "$SILENT" ]; then
      echo $BASENAME: template $template not found
    fi
    return 1
  fi

}

TEMPLATE_UPDATE_LIST=""

if [ "$1" == "--help" ]; then
  usage
elif [ "$1" == "--all" ]; then
  template_svn_commit $BASE_CONF/templates
elif echo $1 | grep -q -e "^--"; then
  usage
elif [ ! -z "$1" ]; then
  do_commit $1 $2
  if [ "$?" == "0" ]; then
    template_svn_commit `dirname $TEMPLATE_BASE`
  fi
else
  SILENT="yes"
  if [ -e $JAIL_LIST ]; then
    for jailpath in `cat $JAIL_LIST`; do
      do_commit $jailpath
    done
  fi
  # main jail
  do_commit / main
  template_svn_commit $BASE_CONF/templates
fi