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##
# Copyright 2009 Jakob Westhoff. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY JAKOB WESTHOFF ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL JAKOB WESTHOFF OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and documentation are those
# of the authors and should not be interpreted as representing official policies,
# either expressed or implied, of Jakob Westhoff
##
include(ParseArguments)
find_package(Vala REQUIRED)
##
# Compile vala files to their c equivalents for further processing.
#
# The "vala_precompile" macro takes care of calling the valac executable on the
# given source to produce c files which can then be processed further using
# default cmake functions.
#
# The first parameter provided is a variable, which will be filled with a list
# of c files outputted by the vala compiler. This list can than be used in
# conjuction with functions like "add_executable" or others to create the
# neccessary compile rules with CMake.
#
# The initial variable is followed by a list of .vala files to be compiled.
# Please take care to add every vala file belonging to the currently compiled
# project or library as Vala will otherwise not be able to resolve all
# dependencies.
#
# The following sections may be specified afterwards to provide certain options
# to the vala compiler:
#
# PACKAGES
# A list of vala packages/libraries to be used during the compile cycle. The
# package names are exactly the same, as they would be passed to the valac
# "--pkg=" option.
#
# OPTIONS
# A list of optional options to be passed to the valac executable. This can be
# used to pass "--thread" for example to enable multi-threading support.
#
# CUSTOM_VAPIS
# A list of custom vapi files to be included for compilation. This can be
# useful to include freshly created vala libraries without having to install
# them in the system.
#
# GENERATE_VAPI
# Pass all the needed flags to the compiler to create an internal vapi for
# the compiled library. The provided name will be used for this and a
# <provided_name>.vapi file will be created.
#
# GENERATE_HEADER
# Let the compiler generate a header file for the compiled code. There will
# be a header file as well as an internal header file being generated called
# <provided_name>.h and <provided_name>_internal.h
#
# The following call is a simple example to the vala_precompile macro showing
# an example to every of the optional sections:
#
# vala_precompile(VALA_C
# source1.vala
# source2.vala
# source3.vala
# PACKAGES
# gtk+-2.0
# gio-1.0
# posix
# OPTIONS
# --thread
# CUSTOM_VAPIS
# some_vapi.vapi
# GENERATE_VAPI
# myvapi
# GENERATE_HEADER
# myheader
# )
#
# Most important is the variable VALA_C which will contain all the generated c
# file names after the call.
##
macro(vala_precompile output)
include_directories(${CMAKE_CURRENT_BINARY_DIR})
parse_arguments(ARGS "PACKAGES;OPTIONS;GENERATE_HEADER;GENERATE_VAPI;CUSTOM_VAPIS" "" ${ARGN})
set(vala_pkg_opts "")
foreach(pkg ${ARGS_PACKAGES})
list(APPEND vala_pkg_opts "--pkg=${pkg}")
endforeach(pkg ${ARGS_PACKAGES})
set(in_files "")
set(out_files "")
set(${output} "")
foreach(src ${ARGS_DEFAULT_ARGS})
list(APPEND in_files "${CMAKE_CURRENT_SOURCE_DIR}/${src}")
string(REPLACE ".vala" ".c" src ${src})
set(out_file "${CMAKE_CURRENT_BINARY_DIR}/${src}")
list(APPEND out_files "${CMAKE_CURRENT_BINARY_DIR}/${src}")
list(APPEND ${output} ${out_file})
endforeach(src ${ARGS_DEFAULT_ARGS})
set(vapi_arguments "")
if(ARGS_GENERATE_VAPI)
list(APPEND out_files "${CMAKE_CURRENT_BINARY_DIR}/${ARGS_GENERATE_VAPI}.vapi")
set(vapi_arguments "--internal-vapi=${ARGS_GENERATE_VAPI}.vapi")
# Header and internal header is needed to generate internal vapi
if (NOT ARGS_GENERATE_HEADER)
set(ARGS_GENERATE_HEADER ${ARGS_GENERATE_VAPI})
endif(NOT ARGS_GENERATE_HEADER)
endif(ARGS_GENERATE_VAPI)
set(header_arguments "")
if(ARGS_GENERATE_HEADER)
list(APPEND out_files "${CMAKE_CURRENT_BINARY_DIR}/${ARGS_GENERATE_HEADER}.h")
list(APPEND out_files "${CMAKE_CURRENT_BINARY_DIR}/${ARGS_GENERATE_HEADER}_internal.h")
list(APPEND header_arguments "--header=${ARGS_GENERATE_HEADER}.h")
list(APPEND header_arguments "--internal-header=${ARGS_GENERATE_HEADER}_internal.h")
endif(ARGS_GENERATE_HEADER)
add_custom_command(OUTPUT ${out_files}
COMMAND
${CMAKE_COMMAND}
-E
remove
${out_files}
COMMAND
${VALA_EXECUTABLE}
"-C"
${header_arguments}
${vapi_arguments}
"-b" ${CMAKE_CURRENT_SOURCE_DIR}
"-d" ${CMAKE_CURRENT_BINARY_DIR}
${vala_pkg_opts}
${ARGS_OPTIONS}
${in_files}
${ARGS_CUSTOM_VAPIS}
DEPENDS
${in_files}
${ARGS_CUSTOM_VAPIS}
)
endmacro(vala_precompile)
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