#!/bin/bash
# simple script to setup apache

function bail {
  echo "ERROR:" "$@"
  exit 1
}

function warn {
  echo "ERROR:" "$@"
}

# Where are we?
[[ -z "$GUMP_HOME" ]] && bail "\$GUMP_HOME not set!"

###
### Settings
###
APACHE_VERSION=2.0.54
APACHE_INSTALL=$GUMP_HOME/webgump/lib/apache2-install

###
### Install apache
###
if [[ ! -d "$APACHE_INSTALL/current" ]]; then
  mkdir $APACHE_INSTALL
  cd $APACHE_INSTALL
  if [[ ! -d "$APACHE_INSTALL/httpd-$APACHE_VERSION" ]]; then
    wget http://apache.surfnet.nl/httpd/httpd-$APACHE_VERSION.tar.gz || bail "Downloading httpd-$APACHE_VERSION failed! maybe there is a new version? Change APACHE_VERSION in webgump/bin/get-apache as appropriate"
    tar zxf httpd-$APACHE_VERSION.tar.gz || bail "Corrupt tarball?"
  fi
  cd $APACHE_INSTALL/httpd-$APACHE_VERSION || bail
  ./configure --prefix=$APACHE_INSTALL/current --enable-mods-shared=most || bail "Apache config failed!"
  make || bail "Apache build failed!"
  make install || bail "Apache build failed!"
else
  warn "It appears apache is already installed at"
  warn "   $APACHE_INSTALL/current"
  warn "We won't attempt re-install"
fi

###
### Install mod_python
###
$GUMP_HOME/webgump/bin/get-mod-python || bail "mod_python download failed!"

###
### Use our own config
###
if [[ -d "$APACHE_INSTALL/current/conf.dist" ]]; then
  echo "WARNING appears our custom apache config is already installed at"
  echo "WARNING   $APACHE_INSTALL/current/conf"
  echo "WARNING We won't attempt re-install"
else
  echo "Installing config..."
  cd $APACHE_INSTALL/current
  mv conf conf.dist
  ln -s $GUMP_HOME/webgump/conf
  cd conf
fi

# Write the basic path-dependent config settings into a seperate file
host=`hostname -s`
if [[ -f "$GUMP_HOME/webgump/conf/$host.conf" ]]; then
  echo "WARNING appears machine specific apache config is already installed at"
  echo "WARNING   $GUMP_HOME/webgump/conf/$host.conf"
  echo "WARNING We won't attempt re-install"
else
  echo "Installing machine-specific config"
  cat > $GUMP_HOME/webgump/conf/$host.conf <<ENDECHO
ServerName $host
ServerRoot "$APACHE_INSTALL/current"
# get most settings from the common config
Include "conf/httpd.conf"

ErrorLog "$GUMP_HOME/webgump/logs/error_log"

DocumentRoot "$GUMP_HOME/webgump/htdocs"
<Directory />
    Options FollowSymLinks
    AllowOverride None
</Directory>

<Directory "$GUMP_HOME/webgump/htdocs">
    Options Indexes FollowSymLinks
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>

<Directory "$GUMP_HOME/webgump/htdocs/app">
    AddHandler python-program .py
    PythonHandler handler::Handler.handle
    PythonPath "sys.path+['$GUMP_HOME/webgump/conf', '$GUMP_HOME/webgump/htdocs/app', '$GUMP_HOME/webgump/lib/python', '$GUMP_HOME/pygump/python']"
    PythonDebug On

    Order allow,deny
    Allow from all

    Options +Includes
    SetOutputFilter INCLUDES
    AcceptPathInfo On
</Directory>
ENDECHO

fi

###
### Done. Report!
###
cat <<ENDMSG

if All went well, apache2 is now installed inside

  $APACHE_INSTALL/current

 You may wish to customize the file

 "$GUMP_HOME/webgump/conf/$host.conf"

to further customize webgump's behaviour. After that,
you should be able to run apache using

 $GUMP_HOME/webgump/bin/start

good luck!
ENDMSG