# Copyright 2005-2009 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/qt4.eclass,v 1.59 2009/11/10 00:56:29 spatz Exp $

# @ECLASS: qt4.eclass
# @MAINTAINER:
# Ben de Groot <yngwin@gentoo.org>,
# Markos Chandras <hwoarang@gentoo.org>,
# Caleb Tennis <caleb@gentoo.org>,
# Przemyslaw Maciag <troll@gentoo.org>,
# Davide Pesavento <davidepesa@gmail.com>
# @BLURB: Eclass for Qt4 packages
# @DESCRIPTION:
# This eclass contains various functions that may be useful
# when dealing with packages using Qt4 libraries.

inherit base eutils multilib toolchain-funcs versionator

export XDG_CONFIG_HOME="${T}"

qt4_monolithic_to_split_flag() {
	case ${1} in
		zlib)
			# Qt 4.4+ is always built with zlib enabled, so this flag isn't needed
			;;
		gif|jpeg|png)
			# qt-gui always installs with these enabled
			checkpkgs+=" x11-libs/qt-gui"
			;;
		dbus|opengl)
			# Make sure the qt-${1} package has been installed already
			checkpkgs+=" x11-libs/qt-${1}"
			;;
		qt3support)
			checkpkgs+=" x11-libs/qt-${1}"
			checkflags+=" x11-libs/qt-core:${1} x11-libs/qt-gui:${1} x11-libs/qt-sql:${1}"
			;;
		ssl)
			# qt-core controls this flag
			checkflags+=" x11-libs/qt-core:${1}"
			;;
		cups|mng|nas|nis|tiff|xinerama|input_devices_wacom)
			# qt-gui controls these flags
			checkflags+=" x11-libs/qt-gui:${1}"
			;;
		firebird|mysql|odbc|postgres|sqlite3)
			# qt-sql controls these flags. sqlite2 is no longer supported so it uses sqlite instead of sqlite3.
			checkflags+=" x11-libs/qt-sql:${1%3}"
			;;
		accessibility)
			eerror "(QA message): Use guiaccessibility and/or qt3accessibility to specify which of qt-gui and qt-qt3support are relevant for this package."
			# deal with this gracefully by checking the flag for what is available
			for y in gui qt3support; do
				has_version x11-libs/qt-${y} && checkflags+=" x11-libs/qt-${y}:${1}"
			done
			;;
		guiaccessibility)
			checkflags+=" x11-libs/qt-gui:accessibility"
			;;
		qt3accessibility)
			checkflags+=" x11-libs/qt-qt3support:accessibility"
			;;
		debug|doc|examples|glib|pch|sqlite|*)
			# packages probably shouldn't be checking these flags so we don't handle them currently
			eerror "qt4.eclass currently doesn't handle the use flag ${1} in QT4_BUILT_WITH_USE_CHECK for qt-4.4. This is either an"
			eerror "eclass bug or an ebuild bug. Please report it at http://bugs.gentoo.org/"
			((fatalerrors+=1))
			;;
	esac
}

# @FUNCTION: qt4_pkg_setup
# @DESCRIPTION:
# Default pkg_setup function for packages that depends on qt4. If you have to
# create ebuilds own pkg_setup in your ebuild, call qt4_pkg_setup in it.
# This function uses two global vars from ebuild:
# - QT4_BUILT_WITH_USE_CHECK - contains use flags that need to be turned on for
#   =x11-libs/qt-4*
# - QT4_OPTIONAL_BUILT_WITH_USE_CHECK - qt4 flags that provides some
#   functionality, but can alternatively be disabled in ${CATEGORY}/${PN}
#   (so qt4 don't have to be recompiled)
#
# NOTE: Using the above vars is now deprecated in favor of eapi-2 use deps
#
# flags to watch for for Qt4.4:
# zlib png | opengl dbus qt3support | sqlite3 ssl
qt4_pkg_setup() {
	local x y checkpkgs checkflags fatalerrors=0 requiredflags=""

	# lots of has_version calls can be very expensive
	if [[ -n ${QT4_BUILT_WITH_USE_CHECK}${QT4_OPTIONAL_BUILT_WITH_USE_CHECK} ]]; then
		ewarn "QA notice: The QT4_BUILT_WITH_USE functionality is deprecated and"
		ewarn "will be removed from future versions of qt4.eclass. Please update"
		ewarn "the ebuild to use eapi-2 use dependencies instead."
		has_version x11-libs/qt-core && local QT44=true
	fi

	for x in ${QT4_BUILT_WITH_USE_CHECK}; do
		if [[ -n ${QT44} ]]; then
			# The use flags are different in 4.4 and above, and it's split packages, so this is used to catch
			# the various use flag combos specified in the ebuilds to make sure we don't error out for no reason.
			qt4_monolithic_to_split_flag ${x}
		else
			[[ ${x} == *accessibility ]] && x=${x#gui} && x=${x#qt3}
			if ! built_with_use =x11-libs/qt-4* ${x}; then
				requiredflags="${requiredflags} ${x}"
			fi
		fi
	done

	local optionalflags=""
	for x in ${QT4_OPTIONAL_BUILT_WITH_USE_CHECK}; do
		if use ${x}; then
			if [[ -n ${QT44} ]]; then
				# The use flags are different in 4.4 and above, and it's split packages, so this is used to catch
				# the various use flag combos specified in the ebuilds to make sure we don't error out for no reason.
				qt4_monolithic_to_split_flag ${x}
			elif ! built_with_use =x11-libs/qt-4* ${x}; then
				optionalflags="${optionalflags} ${x}"
			fi
		fi
	done

	# The use flags are different in 4.4 and above, and it's split packages, so this is used to catch
	# the various use flag combos specified in the ebuilds to make sure we don't error out for no reason.
	for y in ${checkpkgs}; do
		if ! has_version ${y}; then
			eerror "You must first install the ${y} package. It should be added to the dependencies for this package (${CATEGORY}/${PN}). See bug #217161."
			((fatalerrors+=1))
		fi
	done
	for y in ${checkflags}; do
		if ! has_version ${y%:*}; then
			eerror "You must first install the ${y%:*} package with the ${y##*:} flag enabled."
			eerror "It should be added to the dependencies for this package (${CATEGORY}/${PN}). See bug #217161."
			((fatalerrors+=1))
		else
			if ! built_with_use ${y%:*} ${y##*:}; then
				eerror "You must first install the ${y%:*} package with the ${y##*:} flag enabled."
				((fatalerrors+=1))
			fi
		fi
	done

	local diemessage=""
	if [[ ${fatalerrors} -ne 0 ]]; then
		diemessage="${fatalerrors} fatal errors were detected. Please read the above error messages and act accordingly."
	fi
	if [[ -n ${requiredflags} ]]; then
		eerror
		eerror "(1) In order to compile ${CATEGORY}/${PN} first you need to build"
		eerror "=x11-libs/qt-4* with USE=\"${requiredflags}\" flag(s)"
		eerror
		diemessage="(1) recompile qt4 with \"${requiredflags}\" USE flag(s) ; "
	fi
	if [[ -n ${optionalflags} ]]; then
		eerror
		eerror "(2) You are trying to compile ${CATEGORY}/${PN} package with"
		eerror "USE=\"${optionalflags}\""
		eerror "while qt4 is built without this particular flag(s): it will"
		eerror "not work."
		eerror
		eerror "Possible solutions to this problem are:"
		eerror "a) install package ${CATEGORY}/${PN} without \"${optionalflags}\" USE flag(s)"
		eerror "b) re-emerge qt4 with \"${optionalflags}\" USE flag(s)"
		eerror
		diemessage="${diemessage}(2) recompile qt4 with \"${optionalflags}\" USE flag(s) or disable them for ${PN} package\n"
	fi

	[[ -n ${diemessage} ]] && die "can't install ${CATEGORY}/${PN}: ${diemessage}"
}

# @ECLASS-VARIABLE: PATCHES
# @DESCRIPTION:
# In case you have patches to apply, specify them in the PATCHES variable.
# Make sure to specify the full path. This variable is necessary for the
# src_prepare phase.
# example:
# PATCHES="${FILESDIR}/mypatch.patch
# 	${FILESDIR}/mypatch2.patch"
#
# @FUNCTION: qt4_src_prepare
# @DESCRIPTION:
# Default src_prepare function for packages that depend on qt4. If you have to
# override src_prepare in your ebuild, you should call qt4_src_prepare in it,
# otherwise autopatcher will not work!
qt4_src_prepare() {
	debug-print-function $FUNCNAME "$@"
	base_src_prepare
}

# @FUNCTION: eqmake4
# @USAGE: [.pro file] [additional parameters to qmake]
# @DESCRIPTION:
# Runs qmake on the specified .pro file (defaults to ${PN}.pro if called
# without arguments). Additional parameters are appended unmodified to
# qmake command line. For recursive build systems, i.e. those based on
# the subdirs template, you should run eqmake4 on the top-level project
# file only, unless you have strong reasons to do things differently.
# During the building, qmake will be automatically re-invoked with the
# right arguments on every directory specified inside the top-level
# project file by the SUBDIRS variable.
eqmake4() {
	local projectfile="${1:-${PN}.pro}"
	shift

	if [[ ! -f ${projectfile} ]]; then
		echo
		eerror "Project file '${projectfile#${WORKDIR}/}' does not exists!"
		eerror "eqmake4 cannot handle non-existing project files."
		eerror
		eerror "This shouldn't happen - please send a bug report to http://bugs.gentoo.org/"
		echo
		die "Project file not found in ${CATEGORY}/${PN} sources."
	fi

	ebegin "Running qmake on ${projectfile}"

	# make sure CONFIG variable is correctly set for both release and debug builds
	local CONFIG_ADD="release"
	local CONFIG_REMOVE="debug"
	if has debug ${IUSE} && use debug; then
		CONFIG_ADD="debug"
		CONFIG_REMOVE="release"
	fi
	local awkscript='BEGIN {
				printf "### eqmake4 was here ###\n" > file;
				fixed=0;
			}
			/^[[:blank:]]*CONFIG[[:blank:]]*[\+\*]?=/ {
				for (i=1; i <= NF; i++) {
					if ($i ~ rem || $i ~ /debug_and_release/)
						{ $i=add; fixed=1; }
				}
			}
			/^[[:blank:]]*CONFIG[[:blank:]]*-=/ {
				for (i=1; i <= NF; i++) {
					if ($i ~ add) { $i=rem; fixed=1; }
				}
			}
			{
				print >> file;
			}
			END {
				printf "\nCONFIG -= debug_and_release %s\n", rem >> file;
				printf "CONFIG += %s\n", add >> file;
				print fixed;
			}'
	local filepath=
	while read filepath; do
		local file="${filepath#./}"
		grep -q '^### eqmake4 was here ###$' "${file}" && continue
		local retval=$({
				rm -f "${file}" || echo "FAILED"
				awk -v file="${file}" -- "${awkscript}" add=${CONFIG_ADD} rem=${CONFIG_REMOVE} || echo "FAILED"
				} < "${file}")
		if [[ ${retval} == 1 ]]; then
			einfo "  Fixed CONFIG in ${file}"
		elif [[ ${retval} != 0 ]]; then
			eerror "  An error occurred while processing ${file}"
			die "eqmake4 failed to process '${file}'."
		fi
	done < <(find "$(dirname "${projectfile}")" -type f -name "*.pr[io]" 2>/dev/null)

	/usr/bin/qmake -makefile -nocache \
		QTDIR=/usr/$(get_libdir) \
		QMAKE=/usr/bin/qmake \
		QMAKE_CC=$(tc-getCC) \
		QMAKE_CXX=$(tc-getCXX) \
		QMAKE_LINK=$(tc-getCXX) \
		QMAKE_CFLAGS_RELEASE="${CFLAGS}" \
		QMAKE_CFLAGS_DEBUG="${CFLAGS}" \
		QMAKE_CXXFLAGS_RELEASE="${CXXFLAGS}" \
		QMAKE_CXXFLAGS_DEBUG="${CXXFLAGS}" \
		QMAKE_LFLAGS_RELEASE="${LDFLAGS}" \
		QMAKE_LFLAGS_DEBUG="${LDFLAGS}" \
		QMAKE_STRIP= \
		"${projectfile}" "${@}"

	eend $?

	# was qmake successful?
	if [[ $? -ne 0 ]]; then
		echo
		eerror "Running qmake on '${projectfile#${WORKDIR}/}' has failed!"
		eerror "This shouldn't happen - please send a bug report to http://bugs.gentoo.org/"
		echo
		die "qmake failed on '${projectfile}'."
	fi

	return 0
}

case ${EAPI:-0} in
	2)
		EXPORT_FUNCTIONS pkg_setup src_prepare
		;;
	0|1)
		EXPORT_FUNCTIONS pkg_setup
		;;
esac