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# CMake script that writes version control information to a header.
#
# Input variables:
# NAMES - A list of names for each of the source directories.
# <NAME>_SOURCE_DIR - A path to source directory for each name in NAMES.
# HEADER_FILE - The header file to write
#
# The output header will contain macros <NAME>_REPOSITORY and <NAME>_REVISION,
# where "<NAME>" is substituted with the names specified in the input variables,
# for each of the <NAME>_SOURCE_DIR given.
get_filename_component(LLVM_CMAKE_DIR "${CMAKE_SCRIPT_MODE_FILE}" PATH)
list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}")
include(VersionFromVCS)
# Handle strange terminals
set(ENV{TERM} "dumb")
function(append_info name revision repository)
if(revision)
file(APPEND "${HEADER_FILE}.tmp"
"#define ${name}_REVISION \"${revision}\"\n")
else()
file(APPEND "${HEADER_FILE}.tmp"
"#undef ${name}_REVISION\n")
endif()
if(repository)
file(APPEND "${HEADER_FILE}.tmp"
"#define ${name}_REPOSITORY \"${repository}\"\n")
else()
file(APPEND "${HEADER_FILE}.tmp"
"#undef ${name}_REPOSITORY\n")
endif()
endfunction()
foreach(name IN LISTS NAMES)
if(LLVM_FORCE_VC_REVISION AND LLVM_FORCE_VC_REPOSITORY)
set(revision ${LLVM_FORCE_VC_REVISION})
set(repository ${LLVM_FORCE_VC_REPOSITORY})
elseif(LLVM_FORCE_VC_REVISION)
set(revision ${LLVM_FORCE_VC_REVISION})
elseif(LLVM_FORCE_VC_REPOSITORY)
set(repository ${LLVM_FORCE_VC_REPOSITORY})
elseif(${name}_VC_REPOSITORY AND ${name}_VC_REVISION)
set(revision ${${name}_VC_REVISION})
set(repository ${${name}_VC_REPOSITORY})
elseif(DEFINED ${name}_SOURCE_DIR)
if (${name}_SOURCE_DIR)
get_source_info("${${name}_SOURCE_DIR}" revision repository)
endif()
else()
message(FATAL_ERROR "${name}_SOURCE_DIR is not defined")
endif()
append_info(${name} "${revision}" "${repository}")
endforeach()
# Copy the file only if it has changed.
execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
"${HEADER_FILE}.tmp" "${HEADER_FILE}")
file(REMOVE "${HEADER_FILE}.tmp")
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