Simple shell renderer with example of usage

launch.sh

export DEVELOPER="fedir"
export PROJECT_KEY="toto"
./render templates/vhostDev > templates/toto

render.py

#!/usr/bin/python

# Usage : render templateFile > renderedFile

import fileinput
import os
import re

def transform(match):
    return os.getenv(match.group(1))

for line in fileinput.input():
    print re.sub('\$(\w+)', transform, line)

templateFile

<VirtualHost *:80>

  ServerAdmin webmaster@localhost
  DocumentRoot /home/$DEVELOPER/www/$PROJECT_KEY/www/

  <Directory />
    Options FollowSymLinks
    AllowOverride None
  </Directory>

  <Directory /home/$DEVELOPER/www/$PROJECT_KEY/www/>
    Options Indexes FollowSymLinks MultiViews
    AllowOverride None
    Order allow,deny
    allow from all
  </Directory>

  ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
  <Directory "/usr/lib/cgi-bin">
    AllowOverride None
    Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
    Order allow,deny
    Allow from all
  </Directory>

  ErrorLog /home/$DEVELOPER/www/$PROJECT_KEY/logs/error.log

  # Possible values include: debug, info, notice, warn, error, crit, alert, emerg.
  LogLevel warn

  CustomLog /home/$DEVELOPER/www/$PROJECT_KEY/logs/access.log combined

        Alias /xcache-admin "/usr/share/xcache/admin/"
  <Directory "/usr/share/xcache/admin/">
    Order Allow,Deny
    Allow from all
  </Directory>

</VirtualHost>