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123456789101112131415161718192021222324252627282930diff --git a/setup.py b/setup.pyindex 219583b..3ca5f88 100644--- a/setup.py+++ b/setup.py@@ -170,23 +170,7 @@ class CMakeBuild(build_ext): subprocess.check_call(cmake_build, cwd=build_folder) def num_available_cpu_cores(ram_per_build_process_in_gb):- if 'TRAVIS' in os.environ and os.environ['TRAVIS']=='true':- # When building on travis-ci, just use 2 cores since travis-ci limits- # you to that regardless of what the hardware might suggest.- return 2- elif 'CMAKE_BUILD_PARALLEL_LEVEL' in os.environ and os.environ['CMAKE_BUILD_PARALLEL_LEVEL'].isnumeric():- return int(os.environ['CMAKE_BUILD_PARALLEL_LEVEL'])- try:- mem_bytes = os.sysconf('SC_PAGE_SIZE') * os.sysconf('SC_PHYS_PAGES') - mem_gib = mem_bytes/(1024.**3)- num_cores = multiprocessing.cpu_count() - # make sure we have enough ram for each build process.- mem_cores = int(floor(mem_gib/float(ram_per_build_process_in_gb)+0.5));- # We are limited either by RAM or CPU cores. So pick the limiting amount- # and return that.- return max(min(num_cores, mem_cores), 1)- except ValueError:- return 2 # just assume 2 if we can't get the os to tell us the right answer.+ return os.getenv("NIX_BUILD_CORES", 1) from setuptools.command.test import test as TestCommand