#1982 Should `pex ... -e module` be prepending CWD? Issue created by thejcannon According to https://docs.python.org/3/library/sys.html#sys.path

python -m module

prepends CWD to

sys.path

.

$ cat code/foo.py 
import sys
import os

def main():
    print(os.getcwd())
    print(sys.path)


if __name__ == "__main__":
    main()

$ python -m code.foo
/home/josh/work/pants
['/home/josh/work/pants', '/usr/lib/python38.zip', '/usr/lib/python3.8', '/usr/lib/python3.8/lib-dynload', '/home/josh/.local/lib/python3.8/site-packages', '/usr/local/lib/python3.8/dist-packages', '/usr/lib/python3/dist-packages']

* * * PEX help says:

-m MODULE[:SYMBOL], -e MODULE[:SYMBOL], --entry-point MODULE[:SYMBOL]
                        Set the entry point to module or module:symbol. If just specifying module, pex behaves like python -m, e.g. python -m SimpleHTTPServer. If specifying
                        module:symbol, pex assume symbol is a n0-arg callable and imports that symbol and invokes it as if via `sys.exit(symbol())`. (default: None)

So presumably using

pex -D code -e foo

would act like

python -m code.foo

, however:

$ pex -D=code -e foo
/home/josh/work/pants
['/tmp/tmpnu421wmb', '/usr/lib/python38.zip', '/usr/lib/python3.8', '/usr/lib/python3.8/lib-dynload', '/tmp/tmpnu421wmb/.bootstrap']

even if I twiddle with `PEX_INHERIT_PATH:

$ PEX_INHERIT_PATH=fallback pex -D=code -e foo
/home/josh/work/pants
['/tmp/tmpfauv3vos', '/usr/lib/python38.zip', '/usr/lib/python3.8', '/usr/lib/python3.8/lib-dynload', '/usr/local/lib/python3.8/dist-packages', '/usr/lib/python3/dist-packages', '/tmp/tmpfauv3vos/.bootstrap']

$ PEX_INHERIT_PATH=prefer pex -D=code -e foo
/home/josh/work/pants
['/tmp/tmpyj_l3y5m', '/usr/lib/python38.zip', '/usr/lib/python3.8', '/usr/lib/python3.8/lib-dynload', '/usr/local/lib/python3.8/dist-packages', '/usr/lib/python3/dist-packages', '/tmp/tmpyj_l3y5m/.bootstrap']

* * * Furthermore using a function spec:

$ pex -D=code -e foo:main
/home/josh/work/pants
['/tmp/tmp0kfzbnkw', '/usr/lib/python38.zip', '/usr/lib/python3.8', '/usr/lib/python3.8/lib-dynload', '/tmp/tmp0kfzbnkw/.bootstrap']

(It's a big ambiguous if this should prepend CWD as per

python -m

or

""

as per

python -c

as it all depends on how the

entry_point

runner is invoked.) pantsbuild/pex

#1982 Should `pex ... -e module` be prepending CWD? Issue closed as completed by thejcannon pantsbuild/pex