# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

# @ECLASS: python-multilib-single-r1
# @MAINTAINER:
# Python team <python@gentoo.org>
# @AUTHOR:
# Greg Turner <gmt@be-evil.net>
# Based on work of: Michał Górny <mgorny@gentoo.org>
# Based on work of: Krzysztof Pawlik <nelchael@gentoo.org>
# @BLURB: An eclass for Python packages not installed for multiple implementations.
# @DESCRIPTION:
# Multilib reimplementation of python-single-r1.
#
# This eclass extends the IUSE and REQUIRED_USE set by python-r1
# to request correct PYTHON_SINGLE_TARGET. It also provides
# PYTHON_MULTILIB_USEDEP and PYTHON_MULTILIB_DEPS in a suitable form.
#
# Please note that packages support multiple Python implementations
# (using python-r1 eclass or python-multilib-r1 eclass) can not depend
# on packages not supporting them (using this eclass).
#
# Please note that python-multilib-single-r1 will always
# inherit python-multilib-utils-r1 as well. Thus, all the functions defined
# there can be used in the packages using python-single-r1, and there is no
# need ever to inherit both.
#
# For more information, please see the python-r1 Developer's Guide:
# http://www.gentoo.org/proj/en/Python/python-r1/dev-guide.xml

case "${EAPI:-0}" in
	0|1|2|3)
		die "Unsupported EAPI=${EAPI:-0} (too old) for ${ECLASS}"
		;;
	4|5)
		# EAPI=4 is required for USE default deps on USE_EXPAND flags
		;;
	*)
		die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
		;;
esac

# @ECLASS-VARIABLE: PYTHON_COMPAT
# @DESCRIPTION:
# This variable contains a list of Python implementations the package
# supports. It must be set before the `inherit' call. It has to be
# an array.
#
# Example:
# @CODE
# PYTHON_COMPAT=( python{2_5,2_6,2_7} )
# @CODE

# @ECLASS-VARIABLE: PYTHON_REQ_USE_MULTILIB
# @DEFAULT_UNSET
# @DESCRIPTION:
# The list of USEflags required to be enabled on the chosen Python
# implementations, formed as a USE-dependency string. It should be valid
# for all implementations in PYTHON_COMPAT_MULTILIB, so it may be necessary to
# use USE defaults.
#
# This should be set before calling `inherit'.
#
# Example:
# @CODE
# PYTHON_REQ_USE_MULTILIB="gdbm,ncurses(-)?"
# @CODE
#
# It will cause the Python dependencies to look like:
# @CODE
# python_single_target_pythonX_Y? ( dev-lang/python:X.Y[gdbm,ncurses(-)?,${PYTHON_MULTILIB_USEDEP}] )
# @CODE

# @ECLASS-VARIABLE: PYTHON_MULTILIB_DEPS
# @DESCRIPTION:
# This is an framework-generated Python dependency string for all
# implementations listed in PYTHON_COMPAT_MULTILIB.
#
# The dependency string is conditional on PYTHON_SINGLE_TARGET
# and MULTILIB_USEDEP.
#
# Example use:
# @CODE
# RDEPEND="${PYTHON_MULTILIB_DEPS}
#	dev-foo/mydep"
# DEPEND="${RDEPEND}"
# @CODE
#
# Example value:
# @CODE
# FIXME
# @CODE

# @ECLASS-VARIABLE: PYTHON_MULTILIB_SINGLE_MODE
# @DEFAULT_UNSET
# @DESCRIPTION:
# It is rather awkward for a descendant of python-single-r1 to support
# multiple python ABIs as this will not make for trivial porting.
# Rather than attempt a one-size-fits all solution, the python-multilib-r1
# version offers the following modes.  Each of them may be activated by
# placing its name into the PYTHON_MULTILIB_SINGLE_MODE variable before
# inheriting pythong-multilib-single-r1.  For example:
#
# @CODE@
# PYTHON_MULTILIB_SINGLE_MODE=flexible
# inherit python-multilib-single-r1
# @CODE@
#
# The supported modes and their descriptions follow:
#
# default: This mode is selected if the PYTHON_MULTILIB_SINGLE_MODE
# variable is not set.  In this mode, python-multilib-single-r1 acts
# as similarly as possible to the python-single-r1 eclass in that,
# really and truly, only a single no-multilib target may be selected,
# and, if any corresponding multilib targets are enabled corresponding
# to that target, one and only one of them must be selected as well.
# The effective result of this arrangement is that literally a single
# multilib or no-multilib python target will be active.  In this mode,
# the pkg_depend phase function is exported and the python environment
# is established automatically there.  This should minimize the pain
# of porting existing python-multilib-single-r1 ebuilds, but it 
# will maximize the pain for multilib users who will be often pointlessly
# prevented from enabling multiple multilib ABIs in a long chain of
# interdependent ebuilds.  In this mode, the requirement that multilib
# abis match python-multilib abis is not enforced.
#
# flexible: although it will require a greater porting effort, this is
# the most user-friendly mode.  The requirement that multilib abis
# match python ABIs is not enforced; in this mode, for example, it is
# possible for the python_multilib_single_python2_7_x86_x32 use flag to
# be enabled even when the abi_x86_x32 use flag is not enabled for the
# same ebuid.  This does not excuse the ebuild author or the user from
# ensuring that correct dependencies are enforced; it simply divorces the
# multilib ABI of the package from the multilib ABI of python.  This
# can be hard to do correctly so it's not recommended unless you're
# sure you're able to get everything right.  It only makes sense in cases
# where the python interpreter is invoked by the package as an executable
# and not linked to as a library, or when the python build flag may
# be turned off on a per-multilib-ABI basis at configure time.
# To use this mode, you will probably want to invoke python_foreach_impl
# or python_parallel_foreach_impl, or to consume an eclass which invokes
# those for you, in order to get all of the python ABIs correctly
# be iterated through, activated, and worked with correctly.
#
# simple: This is the recommended setting for most ebuilds, even though
# it is not the default since it is easier to port to the default mode
# as a starting point.  In this mode, a complete agreement between the
# multilib-build multilib ABIs and the enabled multilib python ABIs is
# enforced.  In other words, if abi_x86_32 is enabled, and "python2_7"
# is in PYTHON_TARGETS, then PYTHON_MULTILIB_SINGLE_TARGETS_PYTHON2_7_X86
# must contain "32", and, if PYTHON_MULTILIB_SINGLE_TARGETS_PYTHON2_7_X86
# contains "32", then ABI_X86 must contain 32 as well, and
# PYTHON_TARGETS must contain "python2_7".

# @ECLASS-VARIABLE: PYTHON_MULTILIB_USEDEP
# @DESCRIPTION:
# This is an eclass-generated USE-dependency string which can be used to
# depend on another multilib Python package being built for the same Python
# implementations.
#
# The generate USE-flag dependency specifier specification suitable for
# use in dependency atoms for python dependencies.
#
# python-multilib-single-r1 (and maybe later, python-multilib-distutils-ng)
# eclasses. It must not be used on packages using python.eclass.
#
# Example:
#
# @CODE
# RDEPEND="dev-python/foo[${PYTHON_MULTILIB_USEDEP}]"
# @CODE
#
# Example value:
# @CODE
# FIXME
# @CODE

# @ECLASS-VARIABLE: PYTHON_MULTILIB_REQUIRED_USE
# @DESCRIPTION:
# This is an eclass-generated required-use expression which ensures the following:
# 1. Exactly one PYTHON_SINGLE_TARGET value has been enabled.
# 2. The selected PYTHON_SINGLE_TARGET value is enabled in PYTHON_TARGETS.
# 3. No PYTHON_MULTILIB_SINGLE_TARGETS target may be enabled which
#    does not corespond to the selected PYTHON_SINGLE_TARGET
# 4. Each enabled PYTHON_MULTILIB_SINGLE_TARGETS value is enabled in
#    PYTHON_MULTILIB_TARGETS
# 5. Each enabled multilib ABI target requires the corresponding
#    PYTHON_MULTILIB_SINGLE_TARGETS target to be enabled
#    if its corresponding PYTHON_SINGLE_TARGET is enabled.
# 6. At least one PYTHON_MULTILIB_SINGLE_TARGET is enabed.
# 7. Each enabled PYTHON_MULTILIB_SINGLE_TARGET requires
#    the corresponding multilib ABI target to be enabled.
#
# This expression should be utilized in an ebuild by including it in
# REQUIRED_USE, optionally behind a use flag.
#
# Example use:
# @CODE
# REQUIRED_USE="python? ( ${PYTHON_MULTILIB_REQUIRED_USE} )"
# @CODE
#
# Example value:
# @CODE
# <tl;dr>
# @CODE

if [[ ! ${_PYTHON_MULTILIB_SINGLE_R1} ]] ; then
	if [[ ${_PYTHON_ANY_R1} ]]; then
		die 'python-multilib-single-r1.eclass can not be used with python-any-r1.eclass.'
	elif [[ ${_PYTHON_UTILS_R1} ]]; then
		die 'python-multilib-single-r1.eclass cannot be used with python-*-r1 no-multilib eclasses.'
	fi
	
	declare -p PYTHON_COMPAT &>/dev/null || \
		die 'PYTHON_COMPAT not declared.'

	[[ ${_PYTHON_MULTILIB_R1} ]] || \
		inherit python-multilib-r1

_python_single_multilib_set_globals() {
	debug-print-function ${FUNCNAME} "$@"

	local impls=()
	local i si abi uf PYTHON_MULTILIB_PKG_DEP i2 i3

	: ${PYTHON_MULTILIB_SINGLE_MODE:=default}

	PYTHON_MULTILIB_DEPS=
	debug-print "${FUNCNAME}: ----------- nomultilib ----------"

	for i in "${PYTHON_COMPAT[@]}"; do
		_python_nomultilib_impl_supported "${i}" || continue

		# The chosen targets need to be in PYTHON_TARGETS as well.
		# This is in order to enforce correct dependencies on packages
		# supporting multiple implementations.
		PYTHON_MULTILIB_REQUIRED_USE+=" python_single_target_${i}? ( python_targets_${i}" 

		# They are also incompatible with any multilib targets not corresponding
		# to this no-multilib target.  Meanwhile, build composite deps requirements
		# specifying that simultaneously enabled multilib abis and no-multilib single
		# targets require the corresponding multilib single target to be enabled.
		for i2 in "${_CACHED_MULTILIB_FLAGS[@]}" ; do
			[[ ${PYTHON_MULTILIB_SINGLE_MODE} != flexible ]] && \
				PYTHON_MULTILIB_REQUIRED_USE+=" abi_${i2}? ( python_multilib_single_targets_${i}_${i2} )"
			for i3 in "${PYTHON_COMPAT[@]}" ; do
				[[ ${i3} == ${i} ]] && continue
				PYTHON_MULTILIB_REQUIRED_USE+=" !python_multilib_single_targets_${i3}_${i2}"
			done
		done
		
		PYTHON_MULTILIB_REQUIRED_USE+=" ) "
		debug-print "${FUNCNAME}: (after no-multi) PYTHON_MULTILIB_REQUIRED_USE=\"${PYTHON_MULTILIB_REQUIRED_USE}\""

		python_export "${i}" PYTHON_MULTILIB_PKG_DEP
		PYTHON_MULTILIB_DEPS+="python_single_target_${i}? ( ${PYTHON_MULTILIB_PKG_DEP} ) "

		impls+=( "${i}" )
	done

	if [[ ${#impls[@]} -eq 0 ]]; then
		die "No supported implementation in PYTHON_COMPAT."
	fi
	debug-print "${FUNCNAME}: impls=(${impls[*]})"

	local flags_mt=( "${impls[@]/#/python_targets_}" )
	debug-print "${FUNCNAME}: flags_mt=(${flags_mt[*]})"

	local flags=( "${impls[@]/#/python_single_target_}" )
	debug-print "${FUNCNAME}: flags=(${flags[*]})"

	local optflags=${flags_mt[@]/%/(-)?}
	optflags+=,${flags[@]/%/(+)?}
	debug-print "${FUNCNAME}: optflags=(${optflags[*]})"

	IUSE="${flags_mt[*]} ${flags[*]}"
	debug-print "${FUNCNAME}: IUSE=\"${IUSE}\""

	PYTHON_REQUIRED_USE+=" ^^ ( ${flags[*]} )"
	debug-print "${FUNCNAME}: PYTHON_REQUIRED_USE=\"${PYTHON_REQUIRED_USE}\""

	PYTHON_MULTILIB_USEDEP=${optflags// /,}
	debug-print "${FUNCNAME}: PYTHON_MULTILIB_USEDEP=\"${PYTHON_MULTILIB_USEDEP}\""

	PYTHON_MULTILIB_DEPS+=" dev-lang/python-exec:=[${PYTHON_MULTILIB_USEDEP}]"
	debug-print "${FUNCNAME}: PYTHON_MULTILIB_DEPS=\"${PYTHON_MULTILIB_DEPS}\""

	# now do the multilib variables
	debug-print "${FUNCNAME}: ------------ multilib -----------"

	impls=()
	for i in "${PYTHON_COMPAT_MULTILIB[@]}"; do
		_python_multilib_impl_supported "${i}" || continue

		si=$(_python_strip_multilib_impl_abi "${i}")
		uf="abi${i#${si}}"
		i2=$(epythonize "${i}")

		# this will always work during the depend phase but some irrelevant stuff will
		# go missing during the others, due to ABIs disabled in portage.
		# FIXME: probably a pms violation
		if [[ ${i2} ]] ; then
			# The chosen targets need to be in PYTHON_TARGETS and
			# PYTHON_MULTILIB_TARGETS as well.
			#
			# This is in order to enforce correct dependencies on packages
			# supporting multiple implementations.
			PYTHON_MULTILIB_REQUIRED_USE+=" python_multilib_single_targets_${i}? (
				python_multilib_targets_${i}
				python_single_target_${si} "
			# in flexible mode the multilib abi needn't match the python multilib abi
			[[ ${PYTHON_MULTILIB_SINGLE_MODE} != flexible ]] &&
				PYTHON_MULTILIB_REQUIRED_USE+="${uf} "
			PYTHON_MULTILIB_REQUIRED_USE+=") "
	
			python_export "${i2}" PYTHON_MULTILIB_PKG_DEP
			PYTHON_MULTILIB_DEPS+=" python_multilib_single_targets_${i}? ( ${PYTHON_MULTILIB_PKG_DEP} ) "
			impls+=( "${i}" )
		fi
	done

	if [[ ${#impls[@]} -eq 0 ]]; then
		die "No supported implementation in PYTHON_COMPAT_MULTILIB."
	fi

	debug-print "${FUNCNAME}: impls=(${impls[*]})"

	flags_mt=( "${impls[@]/#/python_multilib_targets_}" )
	debug-print "${FUNCNAME}: flags_mt=(${flags_mt[*]})"
	flags=( "${impls[@]/#/python_multilib_single_targets_}" )
	debug-print "${FUNCNAME}: flags=(${flags[*]})"

	optflags=${flags_mt[@]/%/(-)?}
	optflags+=,${flags[@]/%/(+)?}
	debug-print "${FUNCNAME}: optflags=(${optflags[*]})"

	IUSE+=" ${flags_mt[*]} ${flags[*]}"
	debug-print "${FUNCNAME}: final value: IUSE=\"${IUSE}\""

	# in default mode, at most a single multilib useflag is allowed to be selected
	[[ ${PYTHON_MULTILIB_SINGLE_MODE} == default ]] &&
		PYTHON_MULTILIB_REQUIRED_USE+=" || ( ^^ ( ${flags[*]} ) ( ${flags[*]/#/!} ) )"
	debug-print "${FUNCNAME}: final value: PYTHON_MULTILIB_REQUIRED_USE=\"${PYTHON_MULTILIB_REQUIRED_USE}\""

	PYTHON_MULTILIB_USEDEP+="${PYTHON_MULTILIB_USEDEP:+,}${optflags// /,}"
	debug-print "${FUNCNAME}: PYTHON_MULTILIB_USEDEP=\"${PYTHON_MULTILIB_USEDEP}\""

	# 1) well, python-exec would suffice as an RDEP
	# but no point in making this overcomplex, BDEP doesn't hurt anyone
	PYTHON_MULTILIB_DEPS+=" dev-lang/python-exec:=[${PYTHON_MULTILIB_USEDEP}]"
	debug-print "${FUNCNAME}: final result: PYTHON_MULTILIB_DEPS=\"${PYTHON_MULTILIB_DEPS}\""
}
_python_single_multilib_set_globals

# @FUNCTION: python_setup
# @DESCRIPTION:
# There's such thing here.  Don't call this.
python_setup() {
	die "\"${FUNCNAME}\"?  Don't know him.  Try the eclass a few inodes down the dirent, maybe."
}

# @FUNCTION: python_multilib_single_foreach_python
# @DESCRIPTION:
# Determine what the selected Python implementation is, specializing for
# any active multilib-build ABI.  Set the Python build environment up; then,
# run whatever was passed in as an argument.  Then, put things roughly back
# the way they were before.
#python_multilib_single_foreach_python() {
#	debug-print-function ${FUNCNAME} "${@}"
#
#	local EPYTHON PYTHON
#
#	local impl nomulti_impl=
#
#	for impl in "${_PYTHON_ALL_IMPLS_NOMULTILIB[@]}"; do
#		if has "${impl}" "${PYTHON_COMPAT[@]}" \
#			&& use "python_single_target_${impl}"
#		then
#			if [[ ${EPYTHON} ]]; then
#				eerror "Your PYTHON_SINGLE_TARGET setting lists more than a single Python"
#				eerror "implementation. Please set it to just one value. If you need"
#				eerror "to override the value for a single package, please use package.env"
#				eerror "or an equivalent solution (man 5 portage)."
#				echo
#				die "More than one implementation in PYTHON_SINGLE_TARGET."
#			fi
#
#			if ! use "python_targets_${impl}"; then
#				eerror "The implementation chosen as PYTHON_SINGLE_TARGET must be added"
#				eerror "to PYTHON_TARGETS as well. This is in order to ensure that"
#				eerror "dependencies are satisfied correctly. We're sorry"
#				eerror "for the inconvenience."
#				echo
#				die "Build target (${impl}) not in PYTHON_TARGETS."
#			fi
#			EPYTHON=$(epythonize ${impl})
#			nomulti_impl="${impl}"
#			debug-print "${FUNCNAME}: Found matching no-multilib impl \"${impl}\""
#		fi
#	done
#
#	if [[ ! ${EPYTHON} ]]; then
#		eerror "No Python implementation selected for the build. Please set"
#		eerror "the PYTHON_SINGLE_TARGET variable in your make.conf to one"
#		eerror "of the following values:"
#		eerror
#		eerror "${PYTHON_COMPAT[@]}"
#		echo
#		die "No supported Python implementation in PYTHON_SINGLE_TARGET."
#	fi
#
#	# great, we're GTG for no-multilib.  Anything better out in multilib-land?
#	if [[ "${MULTILIB_BUILD_ABI}" ]] ; then 
#		local other_epython other_impl abi_flag=$(multilib_abi_flag "${MULTILIB_BUILD_ABI}")
#		abi_flag="${abi_flag#abi_}"
#		if [[ ${abi_flag} ]] ; then
#			other_impl="${nomulti_impl}_${abi_flag}"
#			if has "${other_impl}" "${PYTHON_COMPAT_MULTILIB[@]}" \
#			&& use "python_multilib_single_targets_${other_impl}"
#			then
#				other_epython=$(epythonize "${other_impl}")
#				if [[ ${other_epython} != ${EPYTHON} ]]; then
#					debug-print "${FUNCNAME}: \"${EPYTHON}\" (nomulti) vs \"${other_epython}\" (multi)?"
#
#					# a wee sanity check
#					local sother_epython=$(_python_strip_epython_abi "${other_epython}")
#					if [[ ${EPYTHON} != ${sother_epython} ]] ; then
#						eerror "The python implementation \"${other_impl}\" appears in your"
#						eerror "PYTHON_MULTILIB_SINGLE_TARGETS_... and seems to correspond to"
#						eerror "the value \"${nomulti_impl}\" in PYTHON_SINGLE_TARGET.  However,"
#						eerror "the epython's don't seem to have the same relationship:"
#						eerror "EPYTHON=\"${EPYTHON}\";other_epython=\"${other_epython}\";sother_epython=\"${sother_epython}\"."
#						eerror "That's not even supposed to be possible!"
#						echo
#						die "${FUNCNAME}: Some kinda bug in the framework, it seems."
#					fi
#				fi
#			fi
#			debug-print "${FUNCNAME}: Yay, declaring multilib victory:"
#			debug-print "${FUNCNAME}: EPYTHON multilib-abi-adjusted from \"${EPYTHON}\" to \"${other_epython}\""
#			EPYTHON=${other_epython}
#		fi
#	fi
#
#	# multilib or not, doesn't matter from here on out.
#	local PATH="${PATH}" PKG_CONFIG_PATH="${PKG_CONFIG_PATH}"
#	export PATH PKG_CONFIG_PATH
#	python_export EPYTHON PYTHON
#	python_wrapper_setup
#	"$@"
#}

# @FUNCTION: python_fix_shebang
# @USAGE: <path>...
# @DESCRIPTION:
# Replace the shebang in Python scripts with the current Python
# implementation (EPYTHON). If a directory is passed, works recursively
# on all Python scripts.
#
# Only files having a 'python' shebang will be modified; other files
# will be skipped. If a script has a complete shebang matching
# the chosen interpreter version, it is left unmodified. If a script has
# a complete shebang matching other version, the command dies.
python_fix_shebang() {
	debug-print-function ${FUNCNAME} "${@}"

	[[ ${1} ]] || die "${FUNCNAME}: no paths given"
	[[ ${EPYTHON} ]] || die "${FUNCNAME}: EPYTHON unset (pkg_setup not called?)"

	local path f
	for path; do
		while IFS= read -r -d '' f; do
			local shebang=$(head -n 1 "${f}")

			case "${shebang}" in
				'#!'*${EPYTHON}*)
					debug-print "${FUNCNAME}: in file ${f#${D}}"
					debug-print "${FUNCNAME}: shebang matches EPYTHON: ${shebang}"
					;;
				'#!'*python[23].[0123456789]*|'#!'*pypy-c*|'#!'*jython*)
					debug-print "${FUNCNAME}: in file ${f#${D}}"
					debug-print "${FUNCNAME}: incorrect specific shebang: ${shebang}"

					die "${f#${D}} has a specific Python shebang not matching EPYTHON"
					;;
				'#!'*python*)
					debug-print "${FUNCNAME}: in file ${f#${D}}"
					debug-print "${FUNCNAME}: rewriting shebang: ${shebang}"

					einfo "Fixing shebang in ${f#${D}}"
					python_rewrite_shebang_multilib "${f}"
			esac
		done < <(find "${path}" -type f -print0)
	done
}

python_multilib_single_with_abi_python() {
	# obtain the abis list
	_python_cache_active_impls
	_python_check_USE_PYTHON
	local impl mp_impl
	for impl in "${_PYTHON_ACTIVE_NOMULTILIB_IMPL_CACHE}" ; do
		for ml_impl in "${_PYTHON_ACTIVE_MULTILIB_IMPL_CACHE}" ; do
			debug-print "${FUNCNAME}: checking impl=\"${impl}\" ml_impl=\"${ml_impl}\" strip_impl_abi -> \"$(_python_strip_multilib_impl_abi ${ml_impl})\" impl_abi -> \"$(_python_impl_abi ${ml_impl})\""
			if [[ $(_python_strip_multilib_impl_abi ${ml_impl}) == ${impl} ]] ; then
				if [[ $(_python_impl_abi ${ml_impl}) == ${ABI:-${DEFAULT_ABI:-default}} ]] ; then
					if [[ $(_python_impl_abi ${ml_impl}) == ${DEFAULT_ABI:-${ABI:-default}} ]] ; then
						debug-print "${FUNCNAME}: got it: invoking python_multilib_automagic_wrapper \"\${impl}\" \"\$@\""
						python_multilib_automagic_wrapper "${impl}" "$@"
					else
						debug-print "${FUNCNAME}: got it: invoking python_multilib_automagic_wrapper \"\${ml_impl}\" \"\$@\""
						python_multilib_automagic_wrapper "${ml_impl}" "$@"
					fi
					return $?
				fi
			fi
		done
		debug-print "${FUNCNAME}: got it (no-ml): invoking python_multilib_automagic_wrapper \"\${impl}\" \"\$@\""
		if [[ $(_python_impl_abi ${impl}) == ${ABI:-${DEFAULT_ABI:-default}} ]] ; then
			python_multilib_automagic_wrapper "${impl}" "$@"
			return $?
		fi
	done
	die "${FUNCNAME}: cant figure out correct impl"
}

_PYTHON_MULTILIB_SINGLE_R1=1
fi