#2051 pex does not respect absense of `--resolve-local-platforms` on Mac M1, builds using local platform anyway Issue created by shalabhc On an M1 Mac, when I don't specify

--resolve-local-platforms

,

pex

will still build dependencies using the local interpreter matching the

--python

flag, even when binary wheels exist. When using rosetta Python (x86 emulation), this issue does not exist. Reproduction - I have two venvs, one for m1 native (arm) and one for rosetta (x86)): Note the binary wheel exists for

grpcio

for requested

--platform

. Using

--complete-platform

does not help.

# x86 works as expected - pulls the binary wheel and makes the pex
% pex --platform=manylinux2014_x86_64-cp-38-cp38 --python=python3.8 --pip-version=22.2.2 --resolver-version=pip-legacy-resolver grpcio==1.47.2 -o grpcio.pex   
(x86-python) ~/src/issues/pex-python-flag
% unzip -l grpcio.pex | grep 'whl/$'                                                                                                                        
        0  01-01-1980 00:00   .deps/grpcio-1.47.2-cp38-cp38-macosx_10_10_x86_64.whl/
        0  01-01-1980 00:00   .deps/grpcio-1.47.2-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl/
        0  01-01-1980 00:00   .deps/six-1.16.0-py2.py3-none-any.whl/

# same command in arm just starts building a wheel
 pex --platform=manylinux2014_x86_64-cp-38-cp38 --python=python3.8 --pip-version=22.2.2 --resolver-version=pip-legacy-resolver grpcio==1.47.2 -o grpcio.pex -v
pex: Building pex :: Resolving distributions (grpcio==1.47.2) :: Resolving requirements. :: Resolving for:
  /Users/shalabh/src/issues/pex-python-flag/arm-python/bin/python3.8
pex: Hashing pex                                                                                                                                                   pex: Hashing pex: 90.3ms                     
pex: Isolating pex: 0.1ms
pex: Building pex :: Resolving distributions (grpcio==1.47.2) :: Resolving requirements. :: Building distributions for:
  BuildRequest(target=LocalInterpreter(id='Users.shalabh.src.issues.pex-python-flag.arm-python.bin.python3.8', platform=Platform(platform='macosx_12_0_arm64', impl='cp', version='3.8.16', version_info=(3, 8, 16), abi='cp38'), marker_environment=MarkerEnvironment(implementation_name='cpython', implementation_version='3.8.16', os_name='posix', platform_machine='arm64', platform_python_implementation='CPython', platform_release='21.6.0', platform_system='Darwin', platform_version='Darwin Kernel Version 21.6.0: Mon Aug 22 20:20:05 PDT 2022; root:xnu-8020.140.49~2/RELEASE_ARM64_T8101', python_full_version='3.8.16', python_version='3.8', sys_platform='darwin'), interpreter=PythonInterpreter('/Users/shalabh/src/issues/pex-python-flag/arm-python/bin/python3.8', PythonIdentity('/Users/shalabh/src/issues/pex-python-flag/arm-python/bin/python3.8', 'cp38', 'cp38', 'macosx_12_0_arm64', (3, 8, 16)))), source_path='/Users/shalabh/.pex/downloads/resolver_download.gmefuolk/Users.spex: Building /Users/shalabh/.pex/downloads/resolver_download.gmefuolk/Users.shalabh.src.issues.pex-python-flag.arm-python.bin.python3.8/grpcio-1.47.2.tar.gz to /Users/shalabh/.pex/built_wheels/sdists/grpcio-1.47.2.tar.gz/c7f888b067f2b1833a5670f20eeac2c6063039a23a99b799929de065c1b18692/cp38-cp38-macosx_12_0_arm64

<CTRL-C>

This has something to do with the

--python

flag because if I remove that, even arm quickly builds the pex from the pypi wheel. pantsbuild/pex

#2051 pex does not respect absense of `--resolve-local-platforms` on Mac M1, builds using local platform anyway Issue closed as completed by jsirois pantsbuild/pex