#!/bin/bash
set -e

declare -A gpgKeys
gpgKeys=(
	[5.6]='6E4F6AB321FDC07F2C332E3AC2BF0BC433CFC8B3 0BD78B5F97500D450838F95DFE857D9A90D90EC1'
	[5.5]='0BD78B5F97500D450838F95DFE857D9A90D90EC1 0B96609E270F565C13292B24C13C70B87267B52D'
	[5.4]='F38252826ACD957EF380D39F2F7956BC5DA04B5D'
	[5.3]='0B96609E270F565C13292B24C13C70B87267B52D 0A95E9A026542D53835E3F3A7DEC4E69FC9C83D7'
)
# see http://php.net/downloads.php

cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"

versions=( "$@" )
if [ ${#versions[@]} -eq 0 ]; then
	versions=( */ )
fi
versions=( "${versions[@]%/}" )

packagesUrl='http://php.net/releases/index.php?serialize=1&version=5&max=100'
packages="$(echo "$packagesUrl" | sed -r 's/[^a-zA-Z.-]+/-/g')"
curl -sSL "${packagesUrl}" > "$packages"

for version in "${versions[@]}"; do
	fullVersion="$(sed 's/;/;\n/g' $packages | grep -e 'php-'"$version"'.*\.tar\.bz2' | sed -r 's/.*php-('"$version"'[^"]+)\.tar\.bz2.*/\1/' | sort -V | tail -1)"
	gpgKey="${gpgKeys[$version]}"
	if [ -z "$gpgKey" ]; then
		echo >&2 "ERROR: missing GPG key fingerprint for $version"
		echo >&2 "  try looking on http://php.net/downloads.php#gpg-$version"
		exit 1
	fi
	
	awk '$1 != "CMD" { print } $1 == "##<apache2>##" && c == 0 { c = 1; system("cat") }' "$version/Dockerfile" > "$version/apache/Dockerfile" <<-'EOD'
		RUN apt-get update && apt-get install -y apache2-bin apache2-dev apache2.2-common --no-install-recommends && rm -rf /var/lib/apt/lists/*
		
		RUN rm -rf /var/www/html && mkdir -p /var/lock/apache2 /var/run/apache2 /var/log/apache2 /var/www/html && chown -R www-data:www-data /var/lock/apache2 /var/run/apache2 /var/log/apache2 /var/www/html
		
		# Apache + PHP requires preforking Apache for best results
		RUN a2dismod mpm_event && a2enmod mpm_prefork
		
		RUN mv /etc/apache2/apache2.conf /etc/apache2/apache2.conf.dist
		COPY apache2.conf /etc/apache2/apache2.conf
	EOD
	
	cat >> "$version/apache/Dockerfile" <<-'EOD'
		WORKDIR /var/www/html
		
		EXPOSE 80
		CMD ["apache2", "-DFOREGROUND"]
	EOD
	
	(
		set -x
		sed -ri '
			s/^(ENV PHP_VERSION) .*/\1 '"$fullVersion"'/;
			s/^(RUN gpg .* --recv-keys) [0-9a-fA-F ]*$/\1 '"$gpgKey"'/
		' "$version/Dockerfile"
		
		cp apache2.conf "$version/apache/"
	)
done

rm "$packages"