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[mlir] Make MLIR Python sources idempotent #97167

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merged 1 commit into from
Jul 2, 2024
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[mlir] Make MLIR Python sources idempotent #97167

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17 changes: 11 additions & 6 deletions mlir/cmake/modules/AddMLIRPython.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -565,8 +565,6 @@ function(add_mlir_python_sources_target name)
message(FATAL_ERROR "Unhandled arguments to add_mlir_python_sources_target(${name}, ... : ${ARG_UNPARSED_ARGUMENTS}")
endif()

add_custom_target(${name})

# On Windows create_symlink requires special permissions. Use copy_if_different instead.
if(CMAKE_HOST_WIN32)
set(_link_or_copy copy_if_different)
Expand All @@ -575,8 +573,6 @@ function(add_mlir_python_sources_target name)
endif()

foreach(_sources_target ${ARG_SOURCES_TARGETS})
add_dependencies(${name} ${_sources_target})

get_target_property(_src_paths ${_sources_target} SOURCES)
if(NOT _src_paths)
get_target_property(_src_paths ${_sources_target} INTERFACE_SOURCES)
Expand All @@ -590,6 +586,8 @@ function(add_mlir_python_sources_target name)
get_target_property(_root_dir ${_sources_target} INTERFACE_INCLUDE_DIRECTORIES)
endif()

# Initialize an empty list of all Python source destination paths.
set(all_dest_paths "")
foreach(_src_path ${_src_paths})
file(RELATIVE_PATH _source_relative_path "${_root_dir}" "${_src_path}")
set(_dest_path "${ARG_OUTPUT_DIRECTORY}/${_source_relative_path}")
Expand All @@ -598,13 +596,17 @@ function(add_mlir_python_sources_target name)
file(MAKE_DIRECTORY "${_dest_dir}")

add_custom_command(
TARGET ${name} PRE_BUILD
OUTPUT "${_dest_path}"
PRE_BUILD
COMMENT "Copying python source ${_src_path} -> ${_dest_path}"
DEPENDS "${_src_path}"
BYPRODUCTS "${_dest_path}"
COMMAND "${CMAKE_COMMAND}" -E ${_link_or_copy}
"${_src_path}" "${_dest_path}"
)

# Track the symlink or copy command output.
list(APPEND all_dest_paths "${_dest_path}")

if(ARG_INSTALL_DIR)
# We have to install each file individually because we need to preserve
# the relative directory structure in the install destination.
Expand All @@ -621,6 +623,9 @@ function(add_mlir_python_sources_target name)
endif()
endforeach()
endforeach()

# Create a new custom target that depends on all symlinked or copied sources.
add_custom_target("${name}" DEPENDS ${all_dest_paths})
endfunction()

################################################################################
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