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CMake/Modules/ExternalProject.cmake

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# - Create custom targets to build projects in external trees
# The 'ep_add' function creates a custom target to drive download,
# update/patch, configure, build, and install steps of an external
# project:
# ep_add(<name> # Name for custom target
# [DEPENDS projects...] # Targets on which the project depends
# [PREFIX dir] # Root dir for entire project
# [LIST_SEPARATOR sep] # Sep to be replaced by ; in cmd lines
# [TMP_DIR dir] # Directory to store temporary files
# [STAMP_DIR dir] # Directory to store step timestamps
# #--Download step--------------
# [DOWNLOAD_DIR dir] # Directory to store downloaded files
# [DOWNLOAD_COMMAND cmd...] # Command to download source tree
# [CVS_REPOSITORY cvsroot] # CVSROOT of CVS repository
# [CVS_MODULE mod] # Module to checkout from CVS repo
# [CVS_TAG tag] # Tag to checkout from CVS repo
# [SVN_REPOSITORY url] # URL of Subversion repo
# [SVN_TAG tag] # Tag to checkout from Subversion repo
# [URL /.../src.tgz] # Full path or URL of source
# #--Update/Patch step----------
# [UPDATE_COMMAND cmd...] # Source work-tree update command
# [PATCH_COMMAND cmd...] # Command to patch downloaded source
# #--Configure step-------------
# [SOURCE_DIR dir] # Source dir to be used for build
# [CONFIGURE_COMMAND cmd...] # Build tree configuration command
# [CMAKE_COMMAND /.../cmake] # Specify alternative cmake executable
# [CMAKE_GENERATOR gen] # Specify generator for native build
# [CMAKE_ARGS args...] # Arguments to CMake command line
# #--Build step-----------------
# [BINARY_DIR dir] # Specify build dir location
# [BUILD_COMMAND cmd...] # Command to drive the native build
# [BUILD_IN_SOURCE 1] # Use source dir for build dir
# #--Install step---------------
# [INSTALL_DIR dir] # Installation prefix
# [INSTALL_COMMAND cmd...] # Command to drive install after build
# )
# The *_DIR options specify directories for the project, with default
# directories computed as follows.
# If the PREFIX option is given to ep_add() or the EP_PREFIX directory
# property is set, then an external project is built and installed
# under the specified prefix:
# TMP_DIR = <prefix>/tmp
# STAMP_DIR = <prefix>/src/<name>-stamp
# DOWNLOAD_DIR = <prefix>/src
# SOURCE_DIR = <prefix>/src/<name>
# BINARY_DIR = <prefix>/src/<name>-build
# INSTALL_DIR = <prefix>
# Otherwise, if the EP_BASE directory property is set then components
# of an external project are stored under the specified base:
# TMP_DIR = <base>/tmp/<name>
# STAMP_DIR = <base>/Stamp/<name>
# DOWNLOAD_DIR = <base>/Download/<name>
# SOURCE_DIR = <base>/Source/<name>
# BINARY_DIR = <base>/Build/<name>
# INSTALL_DIR = <base>/Install/<name>
# If no PREFIX, EP_PREFIX, or EP_BASE is specified then the default
# is to set PREIFX to "<name>-prefix".
# Relative paths are interpreted with respect to the build directory
# corresponding to the source directory in which ep_add is invoked.
#
# If SOURCE_DIR is explicitly set to an existing directory the project
# will be built from it.
# Otherwise a download step must be specified using one of the
# DOWNLOAD_COMMAND, CVS_*, SVN_*, or URL options.
# The URL option may refer locally to a directory or source tarball,
# or refer to a remote tarball (e.g. http://.../src.tgz).
#
# The 'ep_add_step' function adds a custom steps to an external project:
# ep_add_step(<name> <step> # Names of project and custom step
# [COMMAND cmd...] # Command line invoked by this step
# [COMMENT "text..."] # Text printed when step executes
# [DEPENDEES steps...] # Steps on which this step depends
# [DEPENDERS steps...] # Steps that depend on this step
# [DEPENDS files...] # Files on which this step depends
# [ALWAYS 1] # No stamp file, step always runs
# [WORKING_DIRECTORY dir] # Working directory for command
# )
# The command line, comment, and working directory of every standard
# and custom step is processed to replace tokens
# <SOURCE_DIR>,
# <BINARY_DIR>,
# <INSTALL_DIR>,
# and <TMP_DIR>
# with corresponding property values.
#
# The 'ep_get' function retrieves external project target properties:
# ep_get(<name> [prop1 [prop2 [...]]])
# It stores property values in variables of the same name.
# Property names correspond to the keyword argument names of 'ep_add'.
# Pre-compute a regex to match documented keywords for each command.
file(STRINGS "${CMAKE_CURRENT_LIST_FILE}" lines LIMIT_COUNT 100
REGEX "^# ( \\[[A-Z_]+ [^]]*\\] +#.*$|[a-z_]+\\()")
foreach(line IN LISTS lines)
if("${line}" MATCHES "^# [a-z_]+\\(")
if(_ep_func)
set(_ep_keywords_${_ep_func} "${_ep_keywords_${_ep_func}})$")
endif()
string(REGEX REPLACE "^# ([a-z_]+)\\(.*" "\\1" _ep_func "${line}")
#message("function [${_ep_func}]")
set(_ep_keywords_${_ep_func} "^(")
set(_ep_keyword_sep)
else()
string(REGEX REPLACE "^# \\[([A-Z_]+) .*" "\\1" _ep_key "${line}")
#message(" keyword [${_ep_key}]")
set(_ep_keywords_${_ep_func}
"${_ep_keywords_${_ep_func}}${_ep_keyword_sep}${_ep_key}")
set(_ep_keyword_sep "|")
endif()
endforeach()
if(_ep_func)
set(_ep_keywords_${_ep_func} "${_ep_keywords_${_ep_func}})$")
endif()
function(_ep_parse_arguments f name ns args)
# Transfer the arguments to this function into target properties for the
# new custom target we just added so that we can set up all the build steps
# correctly based on target properties.
#
# We loop through ARGN and consider the namespace starting with an
# upper-case letter followed by at least two more upper-case letters
# or underscores to be keywords.
set(key)
foreach(arg IN LISTS args)
if(arg MATCHES "^[A-Z][A-Z_][A-Z_]+$" AND
NOT ((arg STREQUAL "${key}") AND (key STREQUAL "COMMAND")) AND
NOT arg MATCHES "^(TRUE|FALSE)$")
# Keyword
set(key "${arg}")
if(_ep_keywords_${f} AND NOT key MATCHES "${_ep_keywords_${f}}")
message(AUTHOR_WARNING "unknown ${f} keyword: ${key}")
endif()
elseif(key)
# Value
if(NOT arg STREQUAL "")
set_property(TARGET ${name} APPEND PROPERTY ${ns}${key} "${arg}")
else()
get_property(have_key TARGET ${name} PROPERTY ${ns}${key} SET)
if(have_key)
get_property(value TARGET ${name} PROPERTY ${ns}${key})
set_property(TARGET ${name} PROPERTY ${ns}${key} "${value};${arg}")
else()
set_property(TARGET ${name} PROPERTY ${ns}${key} "${arg}")
endif()
endif()
else()
# Missing Keyword
message(AUTHOR_WARNING "value with no keyword in ${f}")
endif()
endforeach()
endfunction(_ep_parse_arguments)
define_property(DIRECTORY PROPERTY "EP_BASE" INHERITED
BRIEF_DOCS "Base directory for External Project storage."
FULL_DOCS
"See documentation of the ep_add() function in the "
"ExternalProject module."
)
define_property(DIRECTORY PROPERTY "EP_PREFIX" INHERITED
BRIEF_DOCS "Top prefix for External Project storage."
FULL_DOCS
"See documentation of the ep_add() function in the "
"ExternalProject module."
)
function(_ep_set_directories name)
get_property(prefix TARGET ${name} PROPERTY _EP_PREFIX)
if(NOT prefix)
get_property(prefix DIRECTORY PROPERTY EP_PREFIX)
if(NOT prefix)
get_property(base DIRECTORY PROPERTY EP_BASE)
if(NOT base)
set(prefix "${name}-prefix")
endif()
endif()
endif()
if(prefix)
set(tmp_default "${prefix}/tmp")
set(download_default "${prefix}/src")
set(source_default "${prefix}/src/${name}")
set(binary_default "${prefix}/src/${name}-build")
set(stamp_default "${prefix}/src/${name}-stamp")
set(install_default "${prefix}")
else() # assert(base)
set(tmp_default "${base}/tmp/${name}")
set(download_default "${base}/Download/${name}")
set(source_default "${base}/Source/${name}")
set(binary_default "${base}/Build/${name}")
set(stamp_default "${base}/Stamp/${name}")
set(install_default "${base}/Install/${name}")
endif()
get_property(build_in_source TARGET ${name} PROPERTY _EP_BUILD_IN_SOURCE)
if(build_in_source)
get_property(have_binary_dir TARGET ${name} PROPERTY _EP_BINARY_DIR SET)
if(have_binary_dir)
message(FATAL_ERROR
"External project ${name} has both BINARY_DIR and BUILD_IN_SOURCE!")
endif()
endif()
set(top "${CMAKE_CURRENT_BINARY_DIR}")
set(places stamp download source binary install tmp)
foreach(var ${places})
string(TOUPPER "${var}" VAR)
get_property(${var}_dir TARGET ${name} PROPERTY _EP_${VAR}_DIR)
if(NOT ${var}_dir)
set(${var}_dir "${${var}_default}")
endif()
if(NOT IS_ABSOLUTE "${${var}_dir}")
get_filename_component(${var}_dir "${top}/${${var}_dir}" ABSOLUTE)
endif()
set_property(TARGET ${name} PROPERTY _EP_${VAR}_DIR "${${var}_dir}")
endforeach()
if(build_in_source)
get_property(source_dir TARGET ${name} PROPERTY _EP_SOURCE_DIR)
set_property(TARGET ${name} PROPERTY _EP_BINARY_DIR "${source_dir}")
endif()
# Make the directories at CMake configure time *and* add a custom command
# to make them at build time. They need to exist at makefile generation
# time for Borland make and wmake so that CMake may generate makefiles
# with "cd C:\short\paths\with\no\spaces" commands in them.
#
# Additionally, the add_custom_command is still used in case somebody
# removes one of the necessary directories and tries to rebuild without
# re-running cmake.
foreach(var ${places})
string(TOUPPER "${var}" VAR)
get_property(dir TARGET ${name} PROPERTY _EP_${VAR}_DIR)
file(MAKE_DIRECTORY "${dir}")
if(NOT EXISTS "${dir}")
message(FATAL_ERROR "dir '${dir}' does not exist after file(MAKE_DIRECTORY)")
endif()
endforeach()
endfunction(_ep_set_directories)
function(ep_get name)
foreach(var ${ARGN})
string(TOUPPER "${var}" VAR)
get_property(${var} TARGET ${name} PROPERTY _EP_${VAR})
if(NOT ${var})
message(FATAL_ERROR "External project \"${name}\" has no ${var}")
endif()
set(${var} "${${var}}" PARENT_SCOPE)
endforeach()
endfunction(ep_get)
function(_ep_get_configure_command_id name cfg_cmd_id_var)
get_target_property(cmd ${name} _EP_CONFIGURE_COMMAND)
if(cmd STREQUAL "")
# Explicit empty string means no configure step for this project
set(${cfg_cmd_id_var} "none" PARENT_SCOPE)
else()
if(NOT cmd)
# Default is "use cmake":
set(${cfg_cmd_id_var} "cmake" PARENT_SCOPE)
else()
# Otherwise we have to analyze the value:
if(cmd MATCHES "^[^;]*/configure")
set(${cfg_cmd_id_var} "configure" PARENT_SCOPE)
elseif(cmd MATCHES "^[^;]*/cmake" AND NOT cmd MATCHES ";-[PE];")
set(${cfg_cmd_id_var} "cmake" PARENT_SCOPE)
elseif(cmd MATCHES "config")
set(${cfg_cmd_id_var} "configure" PARENT_SCOPE)
else()
set(${cfg_cmd_id_var} "unknown:${cmd}" PARENT_SCOPE)
endif()
endif()
endif()
endfunction(_ep_get_configure_command_id)
function(_ep_get_build_command name step cmd_var)
set(cmd "${${cmd_var}}")
if(NOT cmd)
set(args)
_ep_get_configure_command_id(${name} cfg_cmd_id)
if(cfg_cmd_id STREQUAL "cmake")
# CMake project. Select build command based on generator.
get_target_property(cmake_generator ${name} _EP_CMAKE_GENERATOR)
if("${cmake_generator}" MATCHES "Make" AND
"${cmake_generator}" STREQUAL "${CMAKE_GENERATOR}")
# The project uses the same Makefile generator. Use recursive make.
set(cmd "$(MAKE)")
if(step STREQUAL "INSTALL")
set(args install)
endif()
else()
# Drive the project with "cmake --build".
get_target_property(cmake_command ${name} _EP_CMAKE_COMMAND)
if(cmake_command)
set(cmd "${cmake_command}")
else()
set(cmd "${CMAKE_COMMAND}")
endif()
set(args --build ${binary_dir} --config ${CMAKE_CFG_INTDIR})
if(step STREQUAL "INSTALL")
list(APPEND args --target install)
endif()
endif()
else() # if(cfg_cmd_id STREQUAL "configure")
# Non-CMake project. Guess "make" and "make install".
set(cmd "make")
if(step STREQUAL "INSTALL")
set(args install)
endif()
endif()
# Use user-specified arguments instead of default arguments, if any.
get_property(have_args TARGET ${name} PROPERTY _EP_${step}_ARGS SET)
if(have_args)
get_target_property(args ${name} _EP_${step}_ARGS)
endif()
list(APPEND cmd ${args})
endif()
set(${cmd_var} "${cmd}" PARENT_SCOPE)
endfunction(_ep_get_build_command)
function(ep_add_step name step)
set(cmf_dir ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles)
ep_get(${name} stamp_dir)
add_custom_command(APPEND
OUTPUT ${cmf_dir}/${name}-complete
DEPENDS ${stamp_dir}/${name}-${step}
)
_ep_parse_arguments(ep_add_step
${name} _EP_${step}_ "${ARGN}")
# Steps depending on this step.
get_property(dependers TARGET ${name} PROPERTY _EP_${step}_DEPENDERS)
foreach(depender IN LISTS dependers)
add_custom_command(APPEND
OUTPUT ${stamp_dir}/${name}-${depender}
DEPENDS ${stamp_dir}/${name}-${step}
)
endforeach()
# Dependencies on files.
get_property(depends TARGET ${name} PROPERTY _EP_${step}_DEPENDS)
# Dependencies on steps.
get_property(dependees TARGET ${name} PROPERTY _EP_${step}_DEPENDEES)
foreach(dependee IN LISTS dependees)
list(APPEND depends ${stamp_dir}/${name}-${dependee})
endforeach()
# The command to run.
get_property(command TARGET ${name} PROPERTY _EP_${step}_COMMAND)
if(command)
set(comment "Performing ${step} step for '${name}'")
else()
set(comment "No ${step} step for '${name}'")
endif()
get_property(work_dir TARGET ${name} PROPERTY _EP_${step}_WORKING_DIRECTORY)
# Replace list separators.
get_property(sep TARGET ${name} PROPERTY _EP_LIST_SEPARATOR)
if(sep AND command)
string(REPLACE "${sep}" "\\;" command "${command}")
endif()
# Replace location tags.
foreach(var comment command work_dir)
if(${var})
foreach(dir SOURCE_DIR BINARY_DIR INSTALL_DIR TMP_DIR)
get_property(val TARGET ${name} PROPERTY _EP_${dir})
string(REPLACE "<${dir}>" "${val}" ${var} "${${var}}")
endforeach()
endif()
endforeach()
# Custom comment?
get_property(comment_set TARGET ${name} PROPERTY _EP_${step}_COMMENT SET)
if(comment_set)
get_property(comment TARGET ${name} PROPERTY _EP_${step}_COMMENT)
endif()
# Run every time?
get_property(always TARGET ${name} PROPERTY _EP_${step}_ALWAYS)
if(always)
set_property(SOURCE ${stamp_dir}/${name}-${step} PROPERTY SYMBOLIC 1)
set(touch)
else()
set(touch ${CMAKE_COMMAND} -E touch ${stamp_dir}/${name}-${step})
endif()
add_custom_command(
OUTPUT ${stamp_dir}/${name}-${step}
COMMENT ${comment}
COMMAND ${command}
COMMAND ${touch}
DEPENDS ${depends}
WORKING_DIRECTORY ${work_dir}
VERBATIM
)
endfunction(ep_add_step)
function(_ep_add_mkdir_command name)
ep_get(${name}
source_dir binary_dir install_dir stamp_dir download_dir tmp_dir)
ep_add_step(${name} mkdir
COMMENT "Creating directories for '${name}'"
COMMAND ${CMAKE_COMMAND} -E make_directory ${source_dir}
COMMAND ${CMAKE_COMMAND} -E make_directory ${binary_dir}
COMMAND ${CMAKE_COMMAND} -E make_directory ${install_dir}
COMMAND ${CMAKE_COMMAND} -E make_directory ${tmp_dir}
COMMAND ${CMAKE_COMMAND} -E make_directory ${stamp_dir}
COMMAND ${CMAKE_COMMAND} -E make_directory ${download_dir}
)
endfunction(_ep_add_mkdir_command)
function(_ep_add_download_command name)
ep_get(${name} source_dir stamp_dir download_dir tmp_dir)
get_property(cmd_set TARGET ${name} PROPERTY _EP_DOWNLOAD_COMMAND SET)
get_property(cmd TARGET ${name} PROPERTY _EP_DOWNLOAD_COMMAND)
get_property(cvs_repository TARGET ${name} PROPERTY _EP_CVS_REPOSITORY)
get_property(svn_repository TARGET ${name} PROPERTY _EP_SVN_REPOSITORY)
get_property(url TARGET ${name} PROPERTY _EP_URL)
# TODO: Perhaps file:// should be copied to download dir before extraction.
string(REGEX REPLACE "^file://" "" url "${url}")
set(depends)
set(comment)
set(work_dir)
if(cmd_set)
set(work_dir ${download_dir})
elseif(cvs_repository)
find_package(CVS)
if(NOT CVS_EXECUTABLE)
message(FATAL_ERROR "error: could not find cvs for checkout of ${name}")
endif()
get_target_property(cvs_module ${name} _EP_CVS_MODULE)
if(NOT cvs_module)
message(FATAL_ERROR "error: no CVS_MODULE")
endif()
get_property(cvs_tag TARGET ${name} PROPERTY _EP_CVS_TAG)
set(repository ${cvs_repository})
set(module ${cvs_module})
set(tag ${cvs_tag})
configure_file(
"${CMAKE_ROOT}/Modules/RepositoryInfo.txt.in"
"${stamp_dir}/${name}-cvsinfo.txt"
@ONLY
)
get_filename_component(src_name "${source_dir}" NAME)
get_filename_component(work_dir "${source_dir}" PATH)
set(comment "Performing download step (CVS checkout) for '${name}'")
set(cmd ${CVS_EXECUTABLE} -d ${cvs_repository} -q co ${cvs_tag} -d ${src_name} ${cvs_module})
list(APPEND depends ${stamp_dir}/${name}-cvsinfo.txt)
elseif(svn_repository)
find_package(Subversion)
if(NOT Subversion_SVN_EXECUTABLE)
message(FATAL_ERROR "error: could not find svn for checkout of ${name}")
endif()
get_property(svn_tag TARGET ${name} PROPERTY _EP_SVN_TAG)
set(repository ${svn_repository})
set(module)
set(tag ${svn_tag})
configure_file(
"${CMAKE_ROOT}/Modules/RepositoryInfo.txt.in"
"${stamp_dir}/${name}-svninfo.txt"
@ONLY
)
get_filename_component(src_name "${source_dir}" NAME)
get_filename_component(work_dir "${source_dir}" PATH)
set(comment "Performing download step (SVN checkout) for '${name}'")
set(cmd ${Subversion_SVN_EXECUTABLE} co ${svn_repository} ${svn_tag} ${src_name})
list(APPEND depends ${stamp_dir}/${name}-svninfo.txt)
elseif(url)
get_filename_component(work_dir "${source_dir}" PATH)
set(repository "external project URL")
set(module "${url}")
set(tag "")
configure_file(
"${CMAKE_ROOT}/Modules/RepositoryInfo.txt.in"
"${stamp_dir}/${name}-urlinfo.txt"
@ONLY
)
list(APPEND depends ${stamp_dir}/${name}-urlinfo.txt)
if(IS_DIRECTORY "${url}")
get_filename_component(abs_dir "${url}" ABSOLUTE)
set(comment "Performing download step (DIR copy) for '${name}'")
set(cmd ${CMAKE_COMMAND} -E remove_directory ${source_dir}
COMMAND ${CMAKE_COMMAND} -E copy_directory ${abs_dir} ${source_dir})
else()
if("${url}" MATCHES "^[a-z]+://")
# TODO: Should download and extraction be different steps?
string(REGEX MATCH "\\.(tar|tgz|tar\\.gz)" ext "${url}")
set(file ${download_dir}/${name}${ext})
set(cmd ${CMAKE_COMMAND} -Dremote=${url} -Dlocal=${file} -P ${CMAKE_ROOT}/Modules/DownloadFile.cmake
COMMAND)
set(comment "Performing download step (download and extract) for '${name}'")
else()
set(file "${url}")
set(comment "Performing download step (extract) for '${name}'")
endif()
# TODO: Support other archive formats.
list(APPEND cmd ${CMAKE_COMMAND} -Dfilename=${file} -Dtmp=${tmp_dir} -Ddirectory=${source_dir} -P ${CMAKE_ROOT}/Modules/UntarFile.cmake)
endif()
else()
message(SEND_ERROR "error: no download info for '${name}'")
endif()
ep_add_step(${name} download
COMMENT ${comment}
COMMAND ${cmd}
WORKING_DIRECTORY ${work_dir}
DEPENDS ${depends}
DEPENDEES mkdir
)
endfunction(_ep_add_download_command)
function(_ep_add_update_command name)
ep_get(${name} source_dir)
get_property(cmd TARGET ${name} PROPERTY _EP_UPDATE_COMMAND)
get_property(cvs_repository TARGET ${name} PROPERTY _EP_CVS_REPOSITORY)
get_property(svn_repository TARGET ${name} PROPERTY _EP_SVN_REPOSITORY)
set(work_dir)
set(comment)
set(always)
if(cmd)
set(work_dir ${source_dir})
elseif(cvs_repository)
if(NOT CVS_EXECUTABLE)
message(FATAL_ERROR "error: could not find cvs for update of ${name}")
endif()
set(work_dir ${source_dir})
set(comment "Performing update step (CVS update) for '${name}'")
get_property(cvs_tag TARGET ${name} PROPERTY _EP_CVS_TAG)
set(cmd ${CVS_EXECUTABLE} -d ${cvs_repository} -q up -dP ${cvs_tag})
set(always 1)
elseif(svn_repository)
if(NOT Subversion_SVN_EXECUTABLE)
message(FATAL_ERROR "error: could not find svn for update of ${name}")
endif()
set(work_dir ${source_dir})
set(comment "Performing update step (SVN update) for '${name}'")
get_property(svn_tag TARGET ${name} PROPERTY _EP_SVN_TAG)
set(cmd ${Subversion_SVN_EXECUTABLE} up ${svn_tag})
set(always 1)
endif()
ep_add_step(${name} update
COMMENT ${comment}
COMMAND ${cmd}
ALWAYS ${always}
WORKING_DIRECTORY ${work_dir}
DEPENDEES download
)
endfunction(_ep_add_update_command)
function(_ep_add_patch_command name)
ep_get(${name} source_dir)
set(work_dir)
get_property(cmd TARGET ${name} PROPERTY _EP_PATCH_COMMAND)
if(cmd)
set(work_dir ${source_dir})
endif()
ep_add_step(${name} patch
COMMAND ${cmd}
WORKING_DIRECTORY ${work_dir}
DEPENDEES download
)
endfunction(_ep_add_patch_command)
# TODO: Make sure external projects use the proper compiler
function(_ep_add_configure_command name)
ep_get(${name} source_dir binary_dir)
# Depend on other external projects (file-level).
set(file_deps)
get_property(deps TARGET ${name} PROPERTY _EP_DEPENDS)
foreach(dep IN LISTS deps)
get_property(dep_stamp_dir TARGET ${dep} PROPERTY _EP_STAMP_DIR)
list(APPEND file_deps ${dep_stamp_dir}/${dep}-done)
endforeach()
get_property(cmd_set TARGET ${name} PROPERTY _EP_CONFIGURE_COMMAND SET)
if(cmd_set)
get_property(cmd TARGET ${name} PROPERTY _EP_CONFIGURE_COMMAND)
else()
get_target_property(cmake_command ${name} _EP_CMAKE_COMMAND)
if(cmake_command)
set(cmd "${cmake_command}")
else()
set(cmd "${CMAKE_COMMAND}")
endif()
get_property(cmake_args TARGET ${name} PROPERTY _EP_CMAKE_ARGS)
list(APPEND cmd ${cmake_args})
get_target_property(cmake_generator ${name} _EP_CMAKE_GENERATOR)
if(cmake_generator)
list(APPEND cmd "-G${cmake_generator}" "${source_dir}")
endif()
endif()
ep_add_step(${name} configure
COMMAND ${cmd}
WORKING_DIRECTORY ${binary_dir}
DEPENDEES update patch
DEPENDS ${file_deps}
)
endfunction(_ep_add_configure_command)
function(_ep_add_build_command name)
ep_get(${name} binary_dir)
get_property(cmd_set TARGET ${name} PROPERTY _EP_BUILD_COMMAND SET)
if(cmd_set)
get_property(cmd TARGET ${name} PROPERTY _EP_BUILD_COMMAND)
else()
_ep_get_build_command(${name} BUILD cmd)
endif()
ep_add_step(${name} build
COMMAND ${cmd}
WORKING_DIRECTORY ${binary_dir}
DEPENDEES configure
)
endfunction(_ep_add_build_command)
function(_ep_add_install_command name)
ep_get(${name} binary_dir)
get_property(cmd_set TARGET ${name} PROPERTY _EP_INSTALL_COMMAND SET)
if(cmd_set)
get_property(cmd TARGET ${name} PROPERTY _EP_INSTALL_COMMAND)
else()
_ep_get_build_command(${name} INSTALL cmd)
endif()
ep_add_step(${name} install
COMMAND ${cmd}
WORKING_DIRECTORY ${binary_dir}
DEPENDEES build
)
endfunction(_ep_add_install_command)
function(ep_add name)
# Add a custom target for the external project.
set(cmf_dir ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles)
add_custom_target(${name} ALL DEPENDS ${cmf_dir}/${name}-complete)
set_property(TARGET ${name} PROPERTY _EP_IS_EXTERNAL_PROJECT 1)
_ep_parse_arguments(ep_add ${name} _EP_ "${ARGN}")
_ep_set_directories(${name})
ep_get(${name} stamp_dir)
# The 'complete' step depends on all other steps and creates a
# 'done' mark. A dependent external project's 'configure' step
# depends on the 'done' mark so that it rebuilds when this project
# rebuilds. It is important that 'done' is not the output of any
# custom command so that CMake does not propagate build rules to
# other external project targets.
add_custom_command(
OUTPUT ${cmf_dir}/${name}-complete
COMMENT "Completed '${name}'"
COMMAND ${CMAKE_COMMAND} -E touch ${cmf_dir}/${name}-complete
COMMAND ${CMAKE_COMMAND} -E touch ${stamp_dir}/${name}-done
DEPENDS ${stamp_dir}/${name}-install
VERBATIM
)
# Depend on other external projects (target-level).
get_property(deps TARGET ${name} PROPERTY _EP_DEPENDS)
foreach(arg IN LISTS deps)
add_dependencies(${name} ${arg})
endforeach()
# Set up custom build steps based on the target properties.
# Each step depends on the previous one.
#
# The target depends on the output of the final step.
# (Already set up above in the DEPENDS of the add_custom_target command.)
#
_ep_add_mkdir_command(${name})
_ep_add_download_command(${name})
_ep_add_update_command(${name})
_ep_add_patch_command(${name})
_ep_add_configure_command(${name})
_ep_add_build_command(${name})
_ep_add_install_command(${name})
endfunction(ep_add)
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