Creating Linux RPM's From Already Installed Packages

Creating Linux RPM's From Already Installed Packages

You can call today's command "rpm_remk".

# ./rpm_remk mutt        (If, for example, you wanted to create an RPM of the installed version of "mutt" on your system.)

You can be as specific or general as RPM will let you when you use this command. For instance, on my box, I only have one instance of mutt.

# rpm –qa | grep mutt

mutt-1.5.6i-64.9

Here is this script helps you out and makes it a little easier for you to retrieve some of those old installed software packages for which the original RPM's have long since disappeared.

# vim rpm_remk 

#!/bin/bash

#

# rpm_remk - Create new RPM's from installed RPM's

#

trap 'rm -rf $temp_var;exit 1' 1 2 3 9 15

if [ $# -ne 1 ]

then

echo "Usage: $0 PackageName"

exit 1

fi

existing_rpm=$1

starting_point=`pwd`

temp_var=$$

mkdir ${starting_point}/RPMS

mkdir ${starting_point}/RPMS/noarch

mkdir ${starting_point}/RPMS/`uname -i`

mkdir $temp_var

cd $temp_var

if [ `expr match \`rpm -q --queryformat "%{INSTALLPREFIX}\n" $existing_rpm\` '(none)'` -ne 0 ]

then

Prefix="/"

else

Prefix=`rpm -q --queryformat "Prefix: %{INSTALLPREFIX}\n" $existing_rpm`

fi

echo "%define _topdir $starting_point" >>$existing_rpm.spec

rpm -q --queryformat "Summary: %{SUMMARY}\n" $existing_rpm >>$existing_rpm.spec

rpm -q --queryformat "Name: %{NAME}\n" $existing_rpm >>$existing_rpm.spec

rpm -q --queryformat "Version: %{VERSION}\n" $existing_rpm >>$existing_rpm.spec

rpm -q --queryformat "Release: %{RELEASE}\n" $existing_rpm >>$existing_rpm.spec

rpm -q --queryformat "Copyright: %{COPYRIGHT}\n" $existing_rpm >>$existing_rpm.spec

rpm -q --queryformat "Group: %{GROUP}\n" $existing_rpm >>$existing_rpm.spec

echo "Prefix: $Prefix" >>$existing_rpm.spec

description=`rpm -q --queryformat "%{DESCRIPTION}\n" $existing_rpm`

echo "%description" >>$existing_rpm.spec

echo "$description" >>$existing_rpm.spec

echo "%files" >>$existing_rpm.spec

rpm -ql $existing_rpm|while read x

do

echo "%{prefix}$x" >>$existing_rpm.spec

done

rpmbuild -bb $existing_rpm.spec 2>&1|grep -v twice

cd $starting_point

mv -f ${starting_point}/RPMS/*/* .

rm -rf $temp_var ${starting_point}/RPMS

:wq