# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id: php.eselect,v 1.1 2005/09/04 09:47:51 stuart Exp $

DESCRIPTION="Manage the /usr/bin/php link"
MAINTAINER="stuart@gentoo.org"
SVN_DATE='$Date: 2005/09/04 09:47:51 $'
VERSION=$(svn_date_to_version "${SVN_DATE}" )

PHP_SYMLINK_TARGETDIR="${ROOT}/usr/bin"
PHP_SYMLINK_APPLIST=( php )
PHP_VERSIONS="4 5 6"
PHP_HELP="php"

find_libdir() {
	# where has multilib put the native php binary?
	for x in lib64 lib32 lib ; do
		for y in ${PHP_VERSIONS} ; do
			if test -d /usr/${x}/php${y}/bin ; then
				libdir=${x}
				return
			fi
		done
	done

	# if we get here, then we can't find where PHP is installed
	# throw in any old default - it doesn't matter, because there's
	# no PHP anyway

	libdir=/usr/lib
}

find_versions() {
	find_libdir

	# how many packages are we looking for?
	musthave=${#PHP_SYMLINK_APPLIST[@]}

	for f in $PHP_VERSIONS ; do
		(( dohave = 0 ))
		for (( i = 0 ; i < ${#PHP_SYMLINK_APPLIST[@]} ; i = i + 1 )) ; do
			n=${PHP_SYMLINK_APPLIST[$i]}
			[[ -f ${ROOT}/usr/${libdir}/php${f}/bin/${n} ]] && (( dohave = $dohave + 1 ))
		done

		if (( $dohave == $musthave )) ; then
			echo "php${f}"
		fi
	done
}

# try to remove the php symlink
#
# $1 - symlink to remove

remove_symlink() {
	[[ -L ${1} ]] && rm -f ${1}
}

# set the php symlink
#
# $1 - symlink to set
# $2 - php version to set it to

set_symlink() {
	PHP_BASENAME=`basename ${1}`

	find_libdir
	target="${ROOT}/usr/${libdir}/$2/bin/`basename $1`"

	pushd "`dirname $1`" 1>/dev/null
	ln -s "${target}" "${PHP_BASENAME}"
	popd 1>/dev/null
}

# work out which PHP version the user has chosen from the list
#
# $1: the list id that the user has chosen

get_phpversion_fromlist () {
	version=$1

	versions=( $(find_versions) )
	for (( i = 0 ; i < ${#versions[@]} ; i = i + 1 )) ; do
		if [[ ${versions[$i]} == ${version} ]] ; then
			echo ${version}
			return
		fi
	done

	echo "(not-found)"
}

get_phpversion_fromlink () {
	echo $1 | sed -e 's|.*/\(php[0-9]\+\)/.*|\1|;'
}

get_current_phpversion () {
	link=$(readlink ${PHP_SYMLINK_TARGETDIR}/${PHP_SYMLINK_APPLIST[0]})
	version=$(get_phpversion_fromlink $link)

	[[ -z "$version" ]] && version="(unset)"
	echo $version
}

# $1: basename of target app
# $2: php version to use

set_current_phpversion() {
	PHP_SYMLINK_REALTARGET="${PHP_SYMLINK_TARGETDIR}/$1"

	if [[ -e ${PHP_SYMLINK_REALTARGET} ]] ; then
		# the target file exists
		# question is - is it a symlink, or something else?

		if [[ ! -L ${PHP_SYMLINK_REALTARGET} ]] ; then
			# it is something else
			#
			# be cautious - do not remove it
			die -q "${PHP_SYMLINK_REALTARGET} exists, but is not a symlink"
		fi
	fi

	if [[ -L ${PHP_SYMLINK_REALTARGET} ]] ; then
		# existing symlink
		if ! remove_symlink ${PHP_SYMLINK_REALTARGET} ; then
			die -q "Couldn't remove existing symlink"
		fi
	fi

	if ! set_symlink ${PHP_SYMLINK_REALTARGET} "${2}" ; then
		die -q "Couldn't set a new symlink"
	fi
}

### show action ###

describe_show() {
	echo "Show the current PHP version for ${PHP_HELP}"
}

do_show() {
	write_list_start "Current PHP version:"
	version=$(get_current_phpversion)
	write_kv_list_entry "$version" ""
}

### list action ###

describe_list() {
	echo "List available PHP versions to link to"
}

do_list() {
	versions=( $(find_versions ) )
	current=$(get_current_phpversion)

	write_list_start "Available PHP versions:"

	if [[ -n ${versions[@]} ]] ; then
		local i
		for (( i = 0 ; i < ${#versions[@]} ; i = i + 1 )) ; do
			linkversion=${versions[${i}]}

			[[ $linkversion == $current ]] && \
				versions[${i}]="${versions[${i}]} $(highlight '*' )"
		done
		write_numbered_list "${versions[@]}"
	else
		write_kv_list_entry "(none found)" ""
	fi
}

### set action ###

describe_set() {
	echo "Set PHP version used"
}

do_set() {
	if [[ -z ${1} ]] ; then
		# no parameter
		die -q "You didn't tell me which version of PHP to use"
	fi

	version=$(get_phpversion_fromlist $1)
	if [[ ${version} == "(not-found)" ]] ; then
		die -q "I don't recognise that version of PHP"
	fi

	for (( i = 0 ; i < ${#PHP_SYMLINK_APPLIST[@]} ; i = i + 1 )) ; do
		set_current_phpversion ${PHP_SYMLINK_APPLIST[$i]} ${version}
	done
}

# vim: set ft=eselect :