PHP-CGI build pack

Forked from https://github.com/heroku/heroku-buildpack-php and simplified, so it can be used with heroku-buildpack-multi.

Script to compile binaries

#!/bin/bash
set -uex
cd /tmp

# Heroku revision.  Must match in 'compile' program.
#
# Affixed to all vendored binary output to represent changes to the
# compilation environment without a change to the upstream version,
# e.g. PHP 5.3.27 without, and then subsequently with, libmcrypt.
heroku_rev='-mgax-3'

# Clear /app directory
find /app -mindepth 1 -print0 | xargs -0 rm -rf

# Take care of vendoring libmcrypt
mcrypt_version=2.5.8
mcrypt_dirname=libmcrypt-$mcrypt_version
mcrypt_archive_name=$mcrypt_dirname.tar.bz2

# Download mcrypt if necessary
if [ ! -f mcrypt_archive_name ]
then
    curl -Lo $mcrypt_archive_name http://sourceforge.net/projects/mcrypt/files/Libmcrypt/2.5.8/libmcrypt-2.5.8.tar.bz2/download
fi

# Clean and extract mcrypt
rm -rf $mcrypt_dirname
tar jxf $mcrypt_archive_name

# Build and install mcrypt.
pushd $mcrypt_dirname
./configure --prefix=/app/vendor/mcrypt \
  --disable-posix-threads --enable-dynamic-loading
make -s
make install -s
popd

# Take care of vendoring PHP.
php_version=5.3.27
php_dirname=php-$php_version
php_archive_name=$php_dirname.tar.bz2

# Download PHP if necessary.
if [ ! -f $php_archive_name ]
then
    curl -Lo $php_archive_name http://us1.php.net/get/php-5.3.27.tar.bz2/from/www.php.net/mirror
fi

# Clean and extract PHP.
rm -rf $php_dirname
tar jxf $php_archive_name

# Compile PHP
pushd $php_dirname
./configure --prefix=/app/php --enable-cgi                          \
--with-mysql --with-pdo-mysql --with-pgsql --with-pdo-pgsql         \
--with-iconv --with-gd --with-curl=/usr/lib                         \
--with-config-file-path=/app/php --enable-soap=shared               \
--with-openssl --with-mcrypt=/app/vendor/mcrypt --enable-sockets    \
--enable-mbstring --enable-zlib
make -s
make install -s
popd

# Copy in MySQL client library.
mkdir -p /app/php/lib/php
cp /usr/lib/libmysqlclient.so.16 /app/php/lib/php

# 'apc' installation
#
# $PATH manipulation Necessary for 'pecl install', which relies on
# PHP binaries relative to $PATH.

export PATH=/app/php/bin:$PATH
/app/php/bin/pecl channel-update pecl.php.net

# Use defaults for apc build prompts.
yes '' | /app/php/bin/pecl install apc

# Stamp and archive binaries.
pushd /app
echo $mcrypt_version > vendor/mcrypt/VERSION
tar -zcf mcrypt-"$mcrypt_version""$heroku_rev".tar.gz vendor/mcrypt
echo $php_version > php/VERSION
tar -zcf php-"$php_version""$heroku_rev".tar.gz php
popd