Change indentation: spaces to tabs

To convert space indentation in significant number of files, you may use the
following script.

#!/bin/bash - 
#===============================================================================
#          FILE:  fixtab.sh
#         USAGE:  ./fixtab.sh <directory>
#   DESCRIPTION:  Convert expanded tabs into tabs with 4 space width
#       OPTIONS: $1 directory
#        AUTHOR: Ruslan Osmanov 
#       CREATED: 04/08/2011 03:26:00 PM UZT
#===============================================================================
set -o nounset                              # Treat unset variables as an error

DIR=$1

function usage(){
 echo "bash $0 <directory>"
}

[[ ! -d $DIR ]] && usage

# Correct existing modelines I used to include modelines beginning from set
# expandtab, so this worked for me. If you don't use modelines, comment it out 
find $DIR -name *.php -exec \
 sed -i -e 's%# vim: set expandtab:%# vim: set noet:%g' {} \;

# Retab & format source code
find $DIR -name *.php -exec \
 vim -u NONE \
 -c 'set ft=php' \
 -c 'set shiftwidth=4' \
 -c 'set tabstop=4' \
 -c 'set noexpandtab!' \
 -c 'set noet' \
 -c 'retab!' \
 -c 'bufdo! "execute normal gg=G"' \
 -c wq \
 {} \;

For example:

$ bash ./fixtab.sh /srv/www/myproject

I would be glad, if this helped somebody.

Create RPM from source in openSUSE easily. Checkinstall

Being new to openSUSE, I searched for a took "like" checkinstall in Debian. But
openSUSE already has it! :) I'll show how to use it.

Firstly, install it:

$ sudo zypper in checkinstall

Now the whole process mainly looks like the following.

$ ./configure && make
######################################################################
# or 
# qmake 
# or whatever appopriate before doing make install.
######################################################################
$ sudo /usr/sbin/checkinstall
######################################################################
# ... checkinstall advices some settings
######################################################################
$ rpm -i /path/to/generated/rpm

Now let's build an RPM for KeePassX password manager:

$ cd /tmp
$ mkdir keepasx
$ cd keepasx
$ svn co https://keepassx.svn.sourceforge.net/svnroot/keepassx/trunk
$ cd trunk
$ qmake

######################################################################
# To install qmake:
# $ sudo zypper in libqt4-devel
######################################################################
$ sudo /usr/sbin/checkinstall
######################################################################
# Now I had some problems with uncreated directories... Had to issue:
# $ sudo mkdir /usr/share/keepassx /usr/share/mimelnk
# and repeat 
# $ sudo /usr/sbin/checkinstall
######################################################################

Now checkinstall should generate file like

$ /usr/src/packages/RPMS/x86_64/keepassx-0.4.3-1.x86_64.rpm

So may now install the RPM normally:

$ sudo rpm -i /usr/src/packages/RPMS/x86_64/keepassx-0.4.3-1.x86_64.rpm