Fixing p4vasp source to install in Arch Linux

#!/bin/bash
##############################################
##The script must be executed inside p4vasp-0.3.26/ source folder.
##All "python" calls will be changed to specifically be "python2" ones.
##############################################
##Required packages libx11 mesa libglapi libegl python2 python2-numpy
## and libgl (only if you're not using nvidia-utils)

a=`find ./ -iname '*.py' | xargs head -1  | awk '/python/ { print x }; { x=$2 }' | xargs ls`

echo "    "
echo "Correcting in"
echo $a
echo 'header from "/usr/bin/python" to "/usr/bin/python2"'
echo 'or header from "/usr/bin/env python" to "/usr/bin/env python2"'


for i in $a
do
  sed -i 's/\/usr\/bin\/python/\/usr\/bin\/python2/' $i
done


sed -i 's/\/usr\/bin\/env python/\/usr\/bin\/env python2/' test/test.py
sed -i 's/\/usr\/bin\/env python/\/usr\/bin\/env python2/' odpdom/setup.py
sed -i 's/\/usr\/bin\/env python/\/usr\/bin\/env python2/' src/fltk-config.py
sed -i 's/\/usr\/bin\/env python/\/usr\/bin\/env python2/' ./p4v.py

echo "    "
echo "Printing header corrected "

for i in $a
do
  head -1 $i
done

##Fixing makefiles
sed -i 's/python configure.py/python2 configure.py/' Makefile
sed -i 's/python makeappletlist.py/python2 makeappletlist.py/' Makefile
sed -i 's/exec python /exec python2 /' Makefile
sed -i 's/python -c /python2 -c /' odpdom/Makefile
sed -i 's/python fltk-config.py/python2 fltk-config.py/' src/Configuration.mk
sed -i 's/python -c/python2 -c/' src/Configuration.mk