path: root/eclass/confutils.eclass

# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/confutils.eclass,v 1.1 2004/06/27 16:05:26 stuart Exp $
#
# eclass/confutils.eclass
#		Utility functions to help with configuring a package
#
#		Based on Stuart's work for the PHP 5 eclass
#
# Author(s)		Stuart Herbert
#				<stuart@gentoo.org>
#
# ========================================================================

IUSE="$IUSE shared"

# ========================================================================
# confutils_init ()
#
# Call this function from your src_compile() function to initialise
# this eclass first

confutils_init () {
	if useq shared ; then
		shared="=shared"
	else
		shared=
	fi
}

# ========================================================================
# confutils_use_conflict ()
#
# Use this function to automatically complain to the user if conflicting
# USE flags have been enabled
#
# $1	- flag that depends on other flags
# $2 .. - flags that conflict

confutils_use_conflict () {
	if ! useq $1 ; then
		return
	fi

	local my_flag="$1"
	shift

	local my_present=
	local my_remove=

	while [ "$1+" != "+" ]; do
		if useq $1 ; then
			my_present="${my_present} $1"
			my_remove="${my_remove} -$1"
		fi
		shift
	done

	if [ -n "$my_present" ]; then
		echo
		eerror "USE flag '$my_flag' conflicts with these USE flag(s):"
		eerror "  $my_present"
		eerror
		eerror "You must disable these conflicting flags before you can emerge this package."
		eerror "You can do this by disabling these flags in /etc/portage/package.use:"
		eerror "    =$CATEGORY/$PN-$PVR: $my_remove"
		eerror
		die "Conflicting USE flags"
	fi
}

# ========================================================================
# confutils_use_depend_all ()
#
# Use this function to automatically complain to the user if a USE flag
# depends on another USE flag that hasn't been enabled
#
# $1	- flag that depends on other flags
# $2	- error message to show
# $3 .. - 

confutils_use_depend_all () {
	if ! useq $1 ; then
		return
	fi

	local my_flag="$1"
	shift

	local my_missing=

	while [ "$1+" != "+" ]; do
		if ! useq $1 ; then
			my_missing="${my_missing} $1"
		fi
		shift
	done

	if [ -n "$my_missing" ]; then
		echo
		eerror "USE flag '$my_flag' needs these additional flag(s) set:"
		eerror "  $my_missing"
		eerror
		eerror "You can do this by enabling these flags in /etc/portage/package.use:"
		eerror "    =$CATEGORY/$PN-$PVR: $my_missing"
		eerror
		eerror "You could disable this flag instead in /etc/portage/package.use:"
		eerror "	=$CATEGORY/$PN-$PVR: -$my_flag"
		echo

		die "Need missing USE flags"
	fi
}

# ========================================================================
# confutils_use_depend_any ()
#
# Use this function to automatically complain to the user if a USE flag
# depends on another USE flag that hasn't been enabled
#
# $1	- flag that depends on other flags
# $2	- error message to show
# $3 .. - 

confutils_use_depend_any () {
	if ! useq $1 ; then
		return
	fi

	local my_flag="$1"
	shift

	local my_found=
	local my_missing=

	while [ "$1+" != "+" ]; do
		if useq $1 ; then
			my_found="${my_found} $1"
		else
			my_missing="${my_missing} $1"
		fi
		shift
	done

	if [ -z "$my_found" ]; then
		echo
		eerror "USE flag '$my_flag' needs one of these additional flag(s) set:"
		eerror "  $my_missing"
		eerror
		eerror "You can do this by enabling one of these flags in /etc/portage/package.use"
		eerror
		die "Need missing USE flag"
	fi
}

# ========================================================================
# enable_extension_disable ()
#
# Use this function to disable an extension that is enabled by default.
# This is provided for those rare configure scripts that don't support
# a --enable for the corresponding --disable
#
# $1	- extension name
# $2	- USE flag

enable_extension_disable () {
	if ! useq "$2" ; then
		my_conf="${my_conf} --disable-$1"
	fi
}

# ========================================================================
# enable_extension_enable () 
#
# This function is like use_enable(), except that it knows about
# enabling modules as shared libraries, and it supports passing
# additional data with the switch
#
# $1	- extension name
# $2	- USE flag
# $3	- 1 = support shared, 0 = never support shared
# $4	- additional setting for configure

enable_extension_enable () {
	local my_shared

	if [ "$3" == "1" ]; then
		my_shared="$shared"
		if [ "$4+" != "+" ]; then
			my_shared="${my_shared},$4"
		fi
	else
		if [ "$4+" != "+" ]; then
			my_shared="=$4"
		fi
	fi

	if useq $2 ; then
		my_conf="${my_conf} --enable-$1$my_shared"
	else
		my_conf="${my_conf} --disable-$1"
	fi
}

# ========================================================================
# enable_extension_without ()
#
# Use this function to disable an extension that is enabled by default
# This function is provided for those rare configure scripts that support
# --without but not the corresponding --with
#
# $1	- extension name
# $2	- USE flag

enable_extension_without () {
	if ! useq "$2" ; then
		my_conf="${my_conf} --without-$1"
	fi
}

# ========================================================================
# enable_extension_with ()
#
# This function is a replacement for use_with.  It supports building
# extensions as shared libraries,

# $1	- extension name
# $2	- USE flag
# $3	- 1 = support shared, 0 = never support shared
# $4	- additional setting for configure

enable_extension_with () {
	local my_shared

	if [ "$3" == "1" ]; then
		my_shared="$shared"
		if [ "$4+" != "+" ]; then
			my_shared="${my_shared},$4"
		fi
	else
		if [ "$4+" != "+" ]; then
			my_shared="=$4"
		fi
	fi

	if useq $2 ; then
		my_conf="${my_conf} --with-$1$my_shared"
	else
		my_conf="${my_conf} --without-$1"
	fi
}