pacman/scripts/updatesync

#!/bin/bash
# 
#   updatesync
#  
#   Copyright (c) 2004 by Jason Chu <jason@archlinux.org>
#   Derived from gensync (c) 2002-2004 Judd Vinet <jvinet@zeroflux.org>
#  
#   This program 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
#   (at your option) any later version.
# 
#   This program 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.
#

myver='2.9.2'

usage() {
	echo "updatesync $myver"
	echo "usage: $0 <action> <destfile> <option> [package_directory]"
	echo
	echo "updatesync will update a sync database by reading a PKGBUILD and"
	echo "modifying the destfile. updatesync updates the database in a temporary"
	echo "directory and then compresses it to <destfile>."
	echo
	echo "There are two types of actions:"
	echo
	echo "upd - Will update a package's entry or create it if it doesn't exist."
	echo "      It takes the package's PKGBUILD as an option."
	echo "del - Will remove a package's entry from the db."
	echo "      It takes the package's name as an option."
	echo
	echo "updatesync will calculate md5sums of packages in the same directory as"
	echo "<destfile>, unless an alternate [package_directory] is specified."
	echo
	echo "example:  updatesync upd /home/mypkgs/custom.db.tar.gz PKGBUILD"
	echo
	echo
	exit 0
}

die()
{
	echo "updatesync: $*" >&2
	rm -rf $ustmpdir
	exit 1
}

get_md5checksum()
{
	if [ "$pkgdir" != "" ]; then
		pkgfile="$pkgdir/$pkgname-$pkgver-$pkgrel.pkg.tar.gz"
	else
		pkgfile="$destdir/$pkgname-$pkgver-$pkgrel.pkg.tar.gz"
	fi
	if [ -f $pkgfile ]; then
		md5line=`md5sum $pkgfile`
		[ ! -z "$md5line" ] && pkgmd5sum=${md5line%  *}
		echo $pkgmd5sum
	fi
	return 0
}

db_write_entry()
{
	unset pkgname pkgver pkgrel pkgdesc force
	unset groups replaces provides depends conflicts
	source $1 || return 1
	cd $ustmpdir
	mkdir $pkgname-$pkgver-$pkgrel || return 1
	cd $pkgname-$pkgver-$pkgrel
	# desc
	: >desc
	echo "%NAME%" >>desc
	echo "$pkgname" >>desc
	echo "" >>desc
	echo "%VERSION%" >>desc
	echo "$pkgver-$pkgrel" >>desc
	echo "" >>desc
	echo "%DESC%" >>desc
	echo "$pkgdesc" >>desc
	echo "" >>desc
	echo "%CSIZE%" >>desc
	echo "$csize" >>desc
	echo "" >>desc
	if [ ! -z $pkgmd5sum ]; then
		echo "%MD5SUM%" >>desc
		echo "$pkgmd5sum" >>desc
		echo "" >>desc
	fi
	if [ ${#groups[*]} -gt 0 ]; then
		echo "%GROUPS%" >>desc
		for it in "${groups[@]}"; do
			echo "$it" >>desc
		done
		echo "" >>desc
	fi
	if [ ${#replaces[*]} -gt 0 ]; then
		echo "%REPLACES%" >>desc
		for it in "${replaces[@]}"; do
			echo "$it" >>desc
		done
		echo "" >>desc
	fi
	if [ "$force" = "y" -o "$force" = "Y" ]; then
		echo "%FORCE%" >>desc
		echo "" >>desc
	fi
	# depends
	: >depends
	if [ ${#depends[*]} -gt 0 ]; then
		echo "%DEPENDS%" >>depends
		for it in "${depends[@]}"; do
		  echo "$it" >>depends
		done
		echo "" >>depends
	fi
	if [ ${#conflicts[*]} -gt 0 ]; then
		echo "%CONFLICTS%" >>depends
		for it in "${conflicts[@]}"; do
		  echo "$it" >>depends
		done
		echo "" >>depends
	fi
	if [ ${#provides[*]} -gt 0 ]; then
		echo "%PROVIDES%" >>depends
		for it in "${provides[@]}"; do
		  echo "$it" >>depends
		done
		echo "" >>depends
	fi
}

delete_entry()
{
	echo $1 | grep PKGBUILD 2>&1 >/dev/null
	if [ $? -eq 0 ]; then
		source $1
	else
		pkgname=$1
	fi
	for i in *; do
		if [ "${i%-*-*}" = "$pkgname" ]; then
			echo "updatesync: deleting $i" >&2
			rm -rf $i
		fi
	done
}

if [ $# -lt 3 ]; then
	usage
	exit 0
fi

if [ "$1" = "-h" -o "$1" = "--help" ]; then
	usage
	exit 0
fi

action=$1
pkgdb=$2
option=$3
curdir="`pwd`"
pkgdir=$curdir
if [ "$4" != "" ]; then
	pkgdir=$4
fi

if [ "$action" != "upd" -a "$action" != "del" ]; then
	usage
	exit 1
fi

ustmpdir=$(mktemp -d /tmp/updatesync.XXXXXXXXXX) || exit 1

cd $ustmpdir
if [ ! -f $pkgdb ]; then
	if [ ! -f $curdir/$pkgdb ]; then
		echo "updatesync: $pkgdb not found"
		exit 1
	fi
	pkgdb=$curdir/$pkgdb
fi

if [ "$action" = "upd" -a ! -f $option ]; then
	if [ ! -f $curdir/$option ]; then
		echo "updatesync: $option not found"
		exit 1
	fi
	option=$curdir/$option
fi

echo "updatesync: uncompressing to $ustmpdir..." >&2
tar -xzf $pkgdb || die "error uncompressing $pkgdb"
if [ "$action" = "upd" ]; then
	# INSERT / UPDATE
	delete_entry $option

	source $option || die "errors parsing $option"
	if [ "$pkgdir" != "" ]; then
		pkgfile="$pkgdir/$pkgname-$pkgver-$pkgrel.pkg.tar.gz"
	else
		pkgfile="$destdir/$pkgname-$pkgver-$pkgrel.pkg.tar.gz"
	fi
	[ -f $pkgfile ] || die "missing package file: $pkgfile"
	csize=`du -b $pkgfile | cut -f1`
	pkgmd5sum=`get_md5checksum $pkgfile`
	[ -z $pkgmd5sum ] && die "error generating checksum for $pkgfile"
	echo "updatesync: creating entry for $option" >&2
	db_write_entry $option || die "error writing entry for $option"
else
	# DELETE
	delete_entry $option
fi

echo "updatesync: compressing to $pkgdb..." >&2
cd $ustmpdir
tar c * | gzip -9 >$pkgdb || die "error writing to $pkgdb"

cd $curdir
rm -rf $ustmpdir

exit 0