#!/bin/sh

#

# Original Author: Tim Mooney (mooney@plains.NoDak.edu)

# Improvements by: Ken Estes <kestes@staff.mail.com>

# 

# This file is distributed under the terms of the GNU General Public License

#

# vpkg-provides.sh is part of RPM, the Red Hat Package Manager.

# vpkg-provides.sh searches a list of directories (based on what OS

# it's being executed on) for shared libraries and interpreter files

# that have been installed by some packaging system other than RPM.

# It then generates a spec file that can be used to build a "virtual

# package" that provides all of these things without actually

# installing any files.  The spec file in effect tells rpm what it

# needs to know about operating system files which are not under rpm

# control.  This makes it much easier to use RPM on non-Linux systems.

# By default the script also generates a %verifyscript (with hard

# coded $shlib_dirs, $ignore_dirs values) which will check that the

# checksum of each file in the directories searched has not changed

# since the package was built.

# Comments: This script is a quick hack.  A better solution is to use the

# vendor's package management commands to actually query what's installed, and

# build one or more spec files based on that.  This is something

# I intend to write, probably in perl, but the need for something like this

# first effort was great, so I didn't want to wait until the better solution

# was done.

# The complete specfile will be sent to stdout.

# you will need to create a spec_header for the virtual package.  This

# header will provide such specfile information as:

#

#  Summary: 

#  Name: 

#  Version: 

#  Release: 

#  Copyright: 

#  Group: 

#  Source: 

# most of the command line arguments have defaults

usage="usage: $0 --spec_header '/path/to/os-base-header.spec' \n"

usage="$usage\t[--find_provides '/path/to/find-provides']\n"

usage="$usage\t[--shlib_dirs 'dirs:which:contain:shared:libs']\n"

usage="$usage\t[--ignore_dirs 'grep-E|pattern|of|paths|to|ignore']\n"

# these two should be unnecessary as the regular dependency analysis

# should take care of interpreters as well as shared libraries.

usage="$usage\t[--interp_dirs 'dirs:which:contain:interpreters']\n"

usage="$usage\t[--interps 'files:to:assume:are:installed']\n"

usage="$usage\t[--no_verify]\n"

# this command may not be portable to all OS's, does something else

# work? can this be set in the case $osname statement?

sum_cmd="xargs cksum"

date=`date`

hostname=`uname -n`

# if some subdirectories of the system directories need to be ignored

# (eg /usr/local is a subdirectory of /usr but should not be part of

# the virtual package) then call this script with ignore_dirs set to a

# valid grep -E pattern which describes the directories to ignore.

PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/ucb:/usr/bsd

export PATH

#

# The (OS independent) default values.

#

spec_header='/usr/lib/rpm/os-base-header.spec';

interps="sh:csh:ksh:dtksh:wish:tclsh:perl:awk:gawk:nawk:oawk"

find_provides='/usr/lib/rpm/find-provides';

    # no file names begin with this character so it is a good default

    # for dirs to ignore.  

ignore_dirs="@"

osname=`uname -s`

if test $? -ne 0 || test X$osname = X ; then

	echo "I can't determine what platform this is.  Exiting"

	exit 1

fi

#

# Set OS dependent defaults

#

case $osname in

	OSF1)

		shlib_dirs='/shlib:/usr/shlib:/usr/dt/lib:/usr/opt'

		interp_dirs='/bin:/usr/bin:/sbin:/usr/dt/bin:/usr/bin/posix'

		;;

	HP-UX)

		shlib_dirs='/usr/shlib:/usr/dt/lib:/opt'

		shlib_dirs="$shlib_dirs:/usr/bms:/usr/obam:/usr/sam"

		interp_dirs='/bin:/usr/bin:/sbin:/usr/dt/bin:/usr/bin/posix'

		;;

	AIX)

		shlib_dirs='/usr/lib:/usr/ccs/lib:/usr/dt/lib:/usr/lpp:/usr/opt'

		interp_dirs='/bin:/usr/bin:/sbin:/usr/dt/bin'

		;;

	SunOS)

		shlib_dirs='/etc/lib:/etc/vx:/opt:/usr/lib:/usr/ccs/lib:/usr/dt/lib'

		shlib_dirs="$shlib_dirs:/usr/4lib:/usr/openwin/lib:/usr/snadm/lib"

		shlib_dirs="$shlib_dirs:/usr/ucblib:/usr/xpg4/lib"

		interp_dirs='/bin:/usr/bin:/sbin:/usr/dt/bin:/usr/xpg4/bin'

		;;

	IRIX|IRIX64)

		shlib_dirs='/lib:/usr/lib:/usr/lib32:/usr/lib64'

		# Irix always makes me laugh...

		shlib_dirs="$shlib_dirs:/usr/ToolTalk:/usr/xfsm:/usr/SpeedShop"

		shlib_dirs="$shlib_dirs:/usr/sgitcl:/usr/SGImeeting:/usr/pcp/lib"

		shlib_dirs="$shlib_dirs:/usr/Motif-2.1"

		interp_dirs='/bin:/usr/bin:/sbin:/usr/sbin:/usr/dt/bin'

		;;

	*)

		echo "I'm sorry.  I haven't been configured yet to work on $osname."

		echo "Please poke around your system and try figure out what directories"

		echo "I should be searching for shared libraries.  Once you have this"

		echo "information, email it to rpm-list@redhat.com, so that your OS"

		echo "will be supported by some future version of this script."

		echo ""

		echo "Thanks!"

		echo

		exit 2

		;;

esac

# allow the user to change defaults with the command line arguments.

# Loop over all args

while :

do

# Break out if there are no more args

	case $# in

	0)

		break

		;;

	esac

# Get the first arg, and shuffle

	option=$1

	shift

# Make all options have two hyphens

	orig_option=$option	# Save original for error messages

	case $option in

	--*) ;;

	-*) option=-$option ;;

	esac

	case $option in

	--spec_header)

		spec_header=$1

		shift

		;;

	--ignore_dirs)

		ignore_dirs=$1

		shift

		;;

	--find_provides)

		find_provides=$1

		shift

		;;

	--shlib_dirs)

		shlib_dirs=$1

		shift

		;;

	--interp_dirs)

		interp_dirs=$1

		shift

		;;

	--interps)

		interps=$1

		shift

		;;

	--no_verify)

		no_verify=1

		;;

	--help)

		echo $usage

		exit 0

		;;

	*)

		echo "$0: Unrecognized option: \"$orig_option\"; use --help for usage." >&2

		exit 1

		;;

	esac

done

# consistency checks on the arguments

if [ ! -f $spec_header ]; then

	echo "You must pass me the full path to the partial spec file"

	echo "as my first argument, since this file does not appear in the"

	echo "default location of $default_spec_header"

	echo

	echo $usage

	echo

	exit 9

fi

if [ ! -f $find_provides ]; then

	echo "You must pass me the full path to the find-provides script as my"

	echo "second argument, since find-provides does not appear in the"

	echo "default location of $default_find_provides"

	echo

	echo $usage

	echo

	exit 9

fi

provides_tmp=${TMPDIR:-/tmp}/provides.$$

if test -f $provides_tmp ; then

	echo "$provides_tmp already exists.  Exiting."

	exit 11

fi

#

# iterate through all the directories in shlib_dirs, looking for shared

# libraries

#

for d in `echo $shlib_dirs | sed -e 's/:/ /g'`

do

	find $d -type f -print 2>/dev/null | grep -E -v \'$ignore_dirs\' | $find_provides >> $provides_tmp

done

sum_tmp=${TMPDIR:-/tmp}/sum.$$

if test -f $sum_tmp ; then

	echo "$sum_tmp already exists.  Exiting."

	exit 11

fi

#

# iterate through all the directories in shlib_dirs, record the sum

#

for d in `echo $shlib_dirs | sed -e 's/:/ /g'`

do

	find $d -type f -print 2>/dev/null | grep -E -v \'$ignore_dirs\' | $sum_cmd >> $sum_tmp

done

#

# output the initial part of the spec file

#

cat $spec_header

#

# output the 'Provides: ' part of the spec file

#

{

    #

    # Output the shared libraries

    #

    for f in `cat $provides_tmp | sort -u`

    do

	echo "Provides: $f"

    done

    #

    # Output the available shell interpreters

    #

    for d in `echo $interp_dirs | sed -e 's/:/ /g'`

    do

	for f in `echo $interps | sed -e 's/:/ /g'`

	do

		if test -f $d/$f ; then

			echo "Provides: $d/$f"

		fi

	done

    done

} | sed -e 's/%/%%/g'

#

# Output the description of the spec file

#

cat <<_EIEIO_

%description

This is a virtual RPM package.  It contains no actual files.  It uses the

\`Provides' token from RPM 3.x and later to list many of the shared libraries

and interpreters that are part of the base operating system and associated

OS packages for $osname.

This virtual package was constructed based on the vendor/system software

installed on the '$osname' machine named '$hostname', as of the date

'$date'.

Input to the script:

                spec_header=$spec_header

                ignore_dirs=$ignore_dirs

                find_provides=$find_provides

                shlib_dirs=$shlib_dirs

                interp_dirs=$interp_dirs

                interps=$interps

_EIEIO_

#

# Output the build sections of the spec file

#

echo '%prep'

echo '# nothing to do'

echo '%build'

echo '# nothing to do'

echo '%install'

echo '# nothing to do'

echo '%clean'

echo '# nothing to do'

if [ -z "${no_verify}" ]; then

#

# Output the optional verify section of the spec file

#

cat <<_EIEIO_

%verifyscript

PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/ucb:/usr/bsd

export PATH

sum_current_tmp=\${TMPDIR:-/tmp}/rpm.sum.current.\$\$

if test -f \$sum_current_tmp ; then

	echo "\$sum_current_tmp already exists.  Exiting."

	exit 11

fi

sum_package_tmp=\${TMPDIR:-/tmp}/rpm.sum.package.\$\$

if test -f \$sum_package_tmp ; then

	echo "\$sum_package_tmp already exists.  Exiting."

	exit 11

fi

for d in `echo $shlib_dirs | sed -e 's/:/ /g'`

do

	find \$d -type f -print 2>/dev/null | grep -E -v \'$ignore_dirs\' | $sum_cmd >> \$sum_current_tmp

done

cat >\$sum_package_tmp <<_EOF_

_EIEIO_

# the contents of the temporary file are hardcoded into the verify

# script so that the file can be reproduced at verification time.

cat $sum_tmp | sed -e 's/%/%%/g'

cat <<_EIEIO_

_EOF_

cmp \$sum_package_tmp \$sum_current_tmp 

if [ \$? -ne 0 ]; then

	echo"Differences found by: cmp \$sum_package_tmp \$sum_current_tmp"

	exit \$?

fi

_EIEIO_

# end optional verify section

fi

#

# Output the files section of the spec file

#

echo '%files'

echo '# no files in a virtual package'

exit 0