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# /etc/conf.d/squash_portage

# SQFS_DIRNAME points to the directory that will contain the sqfs
# images, recommended value is /var/tmp
SQFS_DIRNAME="/var/portage"

# Leave PORTAGE_RW empty for use with tmpfs, a ram-based filesystem,
# This is recommended unless you are short of RAM
PORTAGE_RW=""

#!/sbin/runscript
# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $
#
# /etc/init.d/squash_portage allows efficient compression of
# Gentoo portage arborescence
#
# It requires support for the loop device and squashfs enabled in the kernel,
# module autoloading is also *highly* recommended.
# sys-fs/squashfs and sys-fs/unionfs are necessary for read-write support.
#
# Author: Mathias Laurin
# 2006-11-28, v.0.1.5(4)

source /etc/make.globals
SQFS_CUR="$SQFS_DIRNAME/portage.sqfs"
SQFS_NEW="$SQFS_DIRNAME/portage-current.sqfs"
SQFS_OLD="$SQFS_DIRNAME/portage-old.sqfs"
DEF_RW="/dev/shm/.portage-rw"

depend() {
    need localmount
}

start() {
    ebegin "Mounting read-only squashfs image"
    mount -rt squashfs -o loop $SQFS_CUR $PORTDIR
    retval=$?
    eend $retval
    [ $retval -ne 0 ] && return $retval

    #ebegin "Mounting read-write with aufs"
    ebegin "Mounting read-write with unionfs"
    if [ ! $PORTAGE_RW ]
    then einfo " mounted in tmpfs (RAM)"
    PORTAGE_RW="${DEF_RW}"
    fi
    [ -d $PORTAGE_RW ] || mkdir -p $PORTAGE_RW
    chmod 0750 $PORTAGE_RW
    chown portage:portage $PORTAGE_RW
    #mount -t aufs -o nodev,noexec,dirs=$PORTAGE_RW=rw:$PORTDIR=ro aufs $PORTDIR
    mount -t unionfs -o nodev,noexec,dirs=$PORTAGE_RW=rw:$PORTDIR=ro unionfs $PORTDIR
    eend $?
}

stop() {
   ebegin "Updating portage tree"
   rm -rf /dev/shm/.portage-rw/.wh..wh.plink
   rm     /dev/shm/.portage-rw/.wh..wh.aufs

   [ ! $PORTAGE_RW ] && PORTAGE_RW="${DEF_RW}"
   if [ ! -z `ls -A $PORTAGE_RW | head -n1` ]
   then
      einfo "  Syncing the tree"
      mv -f $SQFS_NEW $SQFS_OLD
      mksquashfs $PORTDIR $SQFS_NEW -no-duplicates 2>/dev/null
      retval=$?
      ln -sf $SQFS_NEW $SQFS_CUR
   else
      einfo "  Nothing to do"
      retval=0
   fi
   eend $retval

   ebegin "Unmounting the tree"
   #umount -t aufs  $PORTDIR
   umount -t unionfs  $PORTDIR
   umount -t squashfs $PORTDIR
   rm -rf $PORTAGE_RW
   eend 0
}

for i in `find -type d -maxdepth 1`; do gtk-update-icon-cache $i; done;