Commit fb98e594 authored by Kirill Smelkov's avatar Kirill Smelkov

gpython: Fix pymain to properly setup sys.path (take 2)

This continues 6b4990f6 (gpython: Fix pymain to properly setup
sys.path[0]) - now we add test and verify that gpython actually sets
sys.path in the same way as underlying python does:

- don't add directory of gpython to sys.path
- for `gpython file` add to sys.path[0] realpath(dir(file)) instead of
  dir(file)  (see PySys_SetArgvEx for the reference, and else - if we do
  not make this change - added test breaks)
- for `gpython -m mod` add to sys.path[0] realpath('') instead of ''.
  This exactly matches PY3 behaviour, while PY2 behaviour is to add ''
  However PY3 behaviour

    * is more sane, and
    * fixes test_defer_excchain_traceback on py27-gevent

  -> so we stick to it.

Now all tests pass again.
parent 1f6f31cd
......@@ -1809,7 +1809,8 @@ def test_qq():
# _pyrun runs `sys.executable argv... <stdin`.
# it returns exit code, stdout and stderr.
def _pyrun(argv, stdin=None, stdout=None, stderr=None, **kw): # -> retcode, stdout, stderr
argv = [sys.executable] + argv
pyexe = kw.pop('pyexe', sys.executable)
argv = [pyexe] + argv
# adjust $PYTHONPATH to point to pygolang. This makes sure that external
# script will succeed on `import golang` when running in-tree.
......@@ -47,7 +47,7 @@ from __future__ import print_function, absolute_import
# init, if provided, is called after options are parsed, but before interpreter start.
def pymain(argv, init=None):
import sys
from os.path import dirname
from os.path import dirname, realpath
run = None # function to run according to -c/-m/file/interactive
version = False # set if `-V`
......@@ -85,7 +85,11 @@ def pymain(argv, init=None):
mod = argv[0]
argv = argv[1:]
sys.argv = [mod] + argv
sys.path.insert(0, '') # cwd
# sys.path <- cwd
# NOTE python2 injects '', while python3 injects realpath('')
# we stick to python3 behaviour, as it is more sane because e.g.
# import path does not change after chdir.
sys.path.insert(0, realpath('')) # realpath(cwd)
def run():
import runpy
# search sys.path for module and run corresponding .py file as script
......@@ -111,7 +115,7 @@ def pymain(argv, init=None):
sys.argv = argv
filepath = argv[0]
sys.path.insert(0, dirname(filepath))
sys.path.insert(0, realpath(dirname(filepath))) # not abspath -> see PySys_SetArgvEx
def run():
# exec with same globals `python` does
# XXX use runpy.run_path() instead?
......@@ -266,6 +270,7 @@ def main():
if exe.endswith(''):
exe = exe[:-len('')]
exe = exe + '.exe'
sys._gpy_underlying_executable = sys.executable
sys.executable = exe
# import os to get access to environment.
......@@ -274,6 +279,16 @@ def main():
# no harm wrt gevent monkey-patching even if we import os first.
import os
# `python /path/to/gpython` adds /path/to to sys.path[0] - remove it.
# `gpython file` will add path-to-file to sys.path[0] by itself, and
# /path/to/gpython is unneccessary and would create difference in behaviour
# in between gpython and python.
exedir = exe[:exe.rindex(os.sep)] # dirname, but os.path cannot be imported yet
if sys.path[0] != exedir:
raise RuntimeError('gpython: internal error: sys.path[0] was not set by underlying python to dirname(gpython):'
'\n\n\tgpython:\t%s\n\tsys.path[0]:\t%s' % (exe, sys.path[0]))
del sys.path[0]
# extract and process -X
# -X gpython.runtime=(gevent|threads) + $GPYTHON_RUNTIME
sys._xoptions = getattr(sys, '_xoptions', {})
......@@ -27,6 +27,11 @@ from six import PY2
from six.moves import builtins
import pytest
from os.path import join, dirname, realpath
here = dirname(__file__)
testdata = join(here, 'testdata')
testprog = join(here, 'testprog')
is_pypy = (platform.python_implementation() == 'PyPy')
is_cpython = (platform.python_implementation() == 'CPython')
......@@ -154,9 +159,6 @@ def test_executable(runtime):
# gpython) and plain python (!gpython).
def test_pymain():
from golang import b
from os.path import join, dirname, realpath
here = dirname(__file__)
testdata = join(dirname(__file__), 'testdata')
# interactive
_ = pyout([], stdin=b'import hello\n', cwd=testdata)
......@@ -206,6 +208,28 @@ def test_pymain():
b"- error::SyntaxWarning::*\n" + \
b"- ignore::Warning::*\n"), _
# verify that pymain sets sys.path in exactly the same way as underlying python does.
def test_pymain_syspath():
# check verifies that print_syspath output for gpython and underlying python is the same.
# if path0cwd2realpath=Y, expect realpath('') instead of '' in sys.path[0]
def check(argv, path0cwd2realpath=False, **kw):
gpyout = u(pyout(argv, **kw))
stdpyout = u(pyout(argv, pyexe=sys._gpy_underlying_executable, **kw))
gpyoutv = gpyout.splitlines()
stdpyoutv = stdpyout.splitlines()
if path0cwd2realpath:
assert stdpyoutv[0] == ''
stdpyoutv[0] = realpath(kw.get('cwd', ''))
assert gpyoutv == stdpyoutv
check([], stdin=b'import print_syspath', cwd=testprog) # interactive
check(['-c', 'import print_syspath'], cwd=testprog) # -c
check(['-m', 'print_syspath'], cwd=testprog, # -m
path0cwd2realpath=(PY2 or is_pypy))
check(['testprog/'], cwd=here) # file
# pymain -V/--version
# gpython_only because output differs from !gpython.
# -*- coding: utf-8 -*-
# Copyright (C) 2020 Nexedi SA and Contributors.
# Kirill Smelkov <>
# This program is free software: you can Use, Study, Modify and Redistribute
# it under the terms of the GNU General Public License version 3, or (at your
# option) any later version, as published by the Free Software Foundation.
# You can also Link and Combine this program with other software covered by
# the terms of any of the Free Software licenses or any of the Open Source
# Initiative approved licenses and Convey the resulting work. Corresponding
# source of such a combination shall include the source code for all other
# software used.
# This program is distributed WITHOUT ANY WARRANTY; without even the implied
# See COPYING file for full licensing terms.
# See for rationale and options.
"""Program/module print_syspath prints value of sys.path"""
from __future__ import print_function, absolute_import
import sys
def main():
for p in sys.path:
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