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cmake: Speed up CMake by not invoking 'west'

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Speed up CMake by 100ms by importing west instead of invoking it as an
executable.

There is significant overhead in invoking west as a script via
pip. The exact reason why is not clear.

Also, simplify the version output parsing as we get the version in a
more machine-readable form now.

Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
This commit is contained in:
Sebastian Bøe 2019-11-05 16:54:20 +01:00 committed by Maureen Helm
parent a0da140a2a
commit 6d6173f247
1 changed files with 14 additions and 20 deletions
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34
cmake/host-tools.cmake
View file

@ -15,31 +15,25 @@ else()
set(MIN_WEST_VERSION 0.6.0)
execute_process(
COMMAND
${WEST} --version
OUTPUT_VARIABLE west_version_output
${PYTHON_EXECUTABLE}
-c
"import west.version; print(west.version.__version__, end='')"
OUTPUT_VARIABLE west_version
RESULT_VARIABLE west_version_output_result
)
# The west --version output is currently multiline: bootstrapper
# followed by installation version. Test both. This will still work
# when .west/west is eliminated from the installation and obtained
# via pypi, which will result in a single line of output.
string(REGEX REPLACE "\n" ";" west_version_output "${west_version_output}")
foreach(item ${west_version_output})
if("${item}" MATCHES "^[^\/\\]*v([0-9]+[.][0-9]+[.][0-9]+)")
set(west_version "${CMAKE_MATCH_1}")
if(${west_version} VERSION_LESS ${MIN_WEST_VERSION})
message(FATAL_ERROR "The detected west version is unsupported.\n\
if(west_version_output_result)
message(FATAL_ERROR "Unable to import west.version from '${PYTHON_EXECUTABLE}'")
endif()
if(${west_version} VERSION_LESS ${MIN_WEST_VERSION})
message(FATAL_ERROR "The detected west version is unsupported.\n\
The version was found to be ${west_version}:\n\
${item}\n\
But the minimum supported version is ${MIN_WEST_VERSION}\n\
Please upgrade, e.g. with:\n\
pip3 install --upgrade west\n\
if the version from pip is too old, or:\n\
west update\n\
if the version in the installation is too old.")
endif()
endif()
endforeach()
Please upgrade with:\n\
pip3 install --upgrade west")
endif()
# Just output information for a single version. This will still work
# even after output is one line.
message(STATUS "Found west: ${WEST} (found suitable version \"${west_version}\", minimum required is \"${MIN_WEST_VERSION}\")")