# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/autotools.eclass,v 1.36 2006/04/09 12:59:22 flameeyes Exp $
#
# Author: Diego Pettenò <flameeyes@gentoo.org>
# Enhancements: Martin Schlemmer <azarah@gentoo.org>
#
# This eclass is for handling autotooled software packages that
# needs to regenerate their build scripts.
#
# NB:  If you add anything, please comment it!

inherit eutils gnuconfig libtool

DEPEND="sys-devel/automake
	sys-devel/autoconf
	sys-devel/libtool"

# Variables:
#
#   AT_M4DIR          - Additional director(y|ies) aclocal should search
#   AT_GNUCONF_UPDATE - Should gnuconfig_update() be run (normally handled by
#                       econf()) [yes|no]
#   AM_OPTS           - Additional options to pass to automake during
#                       eautoreconf call.

# Functions:
#
#   eautoreconf()  - Should do a full autoreconf - normally what most people
#                    will be interested in.  Also should handle additional
#                    directories specified by AC_CONFIG_SUBDIRS.
#   eaclocal()     - Runs aclocal.  Respects AT_M4DIR for additional directories
#                    to search for macro's.
#   _elibtoolize() - Runs libtoolize.  Note the '_' prefix .. to not collide
#                    with elibtoolize() from libtool.eclass
#   eautoconf      - Runs autoconf.
#   eautoheader    - Runs autoheader.
#   eautomake      - Runs automake
#

# XXX: M4DIR should be depreciated
AT_M4DIR=${AT_M4DIR:-${M4DIR}}
AT_GNUCONF_UPDATE="no"


# This function mimes the behavior of autoreconf, but uses the different
# eauto* functions to run the tools. It doesn't accept parameters, but
# the directory with include files can be specified with AT_M4DIR variable.
#
# Note: doesn't run autopoint right now, but runs gnuconfig_update.
eautoreconf() {
	local pwd=$(pwd) x

	# Take care of subdirs
	for x in $(autotools_get_subdirs); do
		if [[ -d ${x} ]] ; then
			cd "${x}"
			AT_NOELIBTOOLIZE="yes" eautoreconf
			cd "${pwd}"
		fi
	done

	einfo "Running eautoreconf in '$(pwd)' ..."
	eaclocal
	_elibtoolize --copy --force
	eautoconf
	eautoheader
	FROM_EAUTORECONF="yes" eautomake ${AM_OPTS}

	# Normally run by econf()
	[[ ${AT_GNUCONF_UPDATE} == "yes" ]] && gnuconfig_update

	[[ ${AT_NOELIBTOOLIZE} == "yes" ]] && return 0

	# Call it here to prevent failures due to elibtoolize called _before_
	# eautoreconf.
	elibtoolize

	return 0
}

# These functions runs the autotools using autotools_run_tool with the
# specified parametes. The name of the tool run is the same of the function
# without e prefix.
# They also force installing the support files for safety.
eaclocal() {
	local aclocal_opts

	# XXX: M4DIR should be depreciated
	AT_M4DIR=${AT_M4DIR:-${M4DIR}}

	if [[ -n ${AT_M4DIR} ]] ; then
		for x in ${AT_M4DIR} ; do
			case "${x}" in
			"-I")
				# We handle it below
				;;
			*)
				[[ ! -d ${x} ]] && ewarn "eaclocal: '${x}' does not exist"
				aclocal_opts="${aclocal_opts} -I ${x}"
				;;
			esac
		done
	fi

	[[ ! -f aclocal.m4 || -n $(grep -e 'generated.*by aclocal' aclocal.m4) ]] && \
		autotools_run_tool aclocal "$@" ${aclocal_opts}
}

_elibtoolize() {
	local opts
	local lttest

	# Check if we should run libtoolize (AM_PROG_LIBTOOL is an older macro,
	# check for both it and the current AC_PROG_LIBTOOL)
	lttest="$(autotools_check_macro "AC_PROG_LIBTOOL")$(autotools_check_macro "AM_PROG_LIBTOOL")"
	[[ -n $lttest ]] || return 0

	[[ -f Makefile.am ]] && opts="--automake"

	[[ "${USERLAND}" == "Darwin" ]] && LIBTOOLIZE="glibtoolize"
	autotools_run_tool ${LIBTOOLIZE:-libtoolize} "$@" ${opts}

	# Need to rerun aclocal
	eaclocal
}

eautoheader() {
	# Check if we should run autoheader
	[[ -n $(autotools_check_macro "AC_CONFIG_HEADERS") ]] || return 0
	autotools_run_tool autoheader "$@"
}

eautoconf() {
	if [[ ! -f configure.ac && ! -f configure.in ]] ; then
		echo
		eerror "No configure.{ac,in} present in '$(pwd | sed -e 's:.*/::')'!"
		echo
		die "No configure.{ac,in} present!"
	fi

	autotools_run_tool autoconf "$@"
}

eautomake() {
	local extra_opts

	[[ -f Makefile.am ]] || return 0

	if [[ -z ${FROM_EAUTORECONF} && -f Makefile.in ]]; then
		local used_automake
		local installed_automake

		installed_automake=$(automake --version | head -n 1 | \
			sed -e 's:.*(GNU automake) ::')
		used_automake=$(head -n 1 < Makefile.in | \
			sed -e 's:.*by automake \(.*\) from .*:\1:')

		if [[ ${installed_automake} != ${used_automake} ]]; then
			einfo "Automake used for the package (${used_automake}) differs from"
			einfo "the installed version (${installed_automake})."
			eautoreconf
			return 0
		fi
	fi

	[[ -f INSTALL && -f AUTHORS && -f ChangeLog && -f NEWS ]] \
		|| extra_opts="${extra_opts} --foreign"

	# --force-missing seems not to be recognized by some flavours of automake
	autotools_run_tool automake --add-missing --copy ${extra_opts} "$@"
}



# Internal function to run an autotools' tool
autotools_run_tool() {
	local STDERR_TARGET="${T}/$$.out"
	local PATCH_TARGET="${T}/$$.patch"
	local ris

	echo "***** $1 *****" > ${STDERR_TARGET%/*}/$1-${STDERR_TARGET##*/}
	echo >> ${STDERR_TARGET%/*}/$1-${STDERR_TARGET##*/}

	ebegin "Running $@"
	$@ >> ${STDERR_TARGET%/*}/$1-${STDERR_TARGET##*/} 2>&1
	ris=$?
	eend ${ris}

	if [[ ${ris} != 0 ]]; then
		echo
		eerror "Failed Running $1 !"
		eerror
		eerror "Include in your bugreport the contents of:"
		eerror
		eerror "  ${STDERR_TARGET%/*}/$1-${STDERR_TARGET##*/}"
		echo
		die "Failed Running $1 !"
	fi
}

# Internal function to check for support
autotools_check_macro() {
	[[ -f configure.ac || -f configure.in ]] && \
		WANT_AUTOCONF="2.5" autoconf --trace=$1 2>/dev/null
	return 0
}

# Internal function to get additional subdirs to configure
autotools_get_subdirs() {
	local subdirs_scan_out

	subdirs_scan_out=$(autotools_check_macro "AC_CONFIG_SUBDIRS")
	[[ -n ${subdirs_scan_out} ]] || return 0

	echo "${subdirs_scan_out}" | gawk \
	'($0 !~ /^[[:space:]]*(#|dnl)/) {
		if (match($0, /AC_CONFIG_SUBDIRS:(.*)$/, res))
			print res[1]
	}' | uniq

	return 0
}