Mailman 3 April 2017 - Distutils-SIG

Sample setup.py for Numeric Python
by Greg Ward 29 Apr '18

29 Apr '18

Hi again -- [cc'd to Paul Dubois: you said you weren't following the distutils sig anymore, but this directly concerns NumPy and I'd like to get your input!] here's that sample setup.py for NumPy. See below for discussion (and questions!). ------------------------------------------------------------------------ #!/usr/bin/env python # Setup script example for building the Numeric extension to Python. # This does sucessfully compile all the .dlls. Nothing happens # with the .py files currently. # Move this file to the Numerical directory of the LLNL numpy # distribution and run as: # python numpysetup.py --verbose build_ext # # created 1999/08 Perry Stoll __rcsid__ = "$Id: numpysetup.py,v 1.1 1999/09/12 20:42:48 gward Exp $" from distutils.core import setup setup (name = "numerical", version = "0.01", description = "Numerical Extension to Python", url = "http://www.python.org/sigs/matrix-sig/", ext_modules = [ ( '_numpy', { 'sources' : [ 'Src/_numpymodule.c', 'Src/arrayobject.c', 'Src/ufuncobject.c' ], 'include_dirs' : ['./Include'], 'def_file' : 'Src/numpy.def' } ), ( 'multiarray', { 'sources' : ['Src/multiarraymodule.c'], 'include_dirs' : ['./Include'], 'def_file': 'Src/multiarray.def' } ), ( 'umath', { 'sources': ['Src/umathmodule.c'], 'include_dirs' : ['./Include'], 'def_file' : 'Src/umath.def' } ), ( 'fftpack', { 'sources': ['Src/fftpackmodule.c', 'Src/fftpack.c'], 'include_dirs' : ['./Include'], 'def_file' : 'Src/fftpack.def' } ), ( 'lapack_lite', { 'sources' : [ 'Src/lapack_litemodule.c', 'Src/dlapack_lite.c', 'Src/zlapack_lite.c', 'Src/blas_lite.c', 'Src/f2c_lite.c' ], 'include_dirs' : ['./Include'], 'def_file' : 'Src/lapack_lite.def' } ), ( 'ranlib', { 'sources': ['Src/ranlibmodule.c', 'Src/ranlib.c', 'Src/com.c', 'Src/linpack.c', ], 'include_dirs' : ['./Include'], 'def_file' : 'Src/ranlib.def' } ), ] ) ------------------------------------------------------------------------ First, what d'you think? Too clunky and verbose? Too much information for each extension? I kind of think so, but I'm not sure how to reduce it elegantly. Right now, the internal data structures needed to compile a module are pretty obviously exposed: is this a good thing? Or should there be some more compact form for setup.py that will be expanded later into the full glory we see above? I've already made one small step towards reducing the amount of cruft by factoring 'include_dirs' out and supplying it directly as a parameter to 'setup()'. (But that needs code not in the CVS archive yet, so I've left the sample setup.py the same for now.) The next thing I'd like to do is get that damn "def_file" out of there. To support it in MSVCCompiler, there's already an ugly hack that unnecessarily affects both the UnixCCompiler and CCompiler classes, and I want to get rid of that. (I refer to passing the 'build_info' dictionary into the compiler classes, if you're familiar with the code -- that dictionary is part of the Distutils extension-building system, and should not propagate into the more general compiler classes.) But I don't want to give these weird "def file" things standing on the order of source files, object files, libraries, etc., because they seem to me to be a bizarre artifact of one particular compiler, rather than something present in a wide range of C/C++ compilers. Based on the NumPy model, it seems like there's a not-too-kludgy way to handle this problem. Namely: if building extension "foo": if file "foo.def" found in same directory as "foo.c" add "/def:foo.def" to MSVC command line this will of course require some platform-specific code in the build_ext command class, but I figured that was coming eventually, so why put it off? ;-) To make this hack work with NumPy, one change would be necessary: rename Src/numpy.def to Src/_numpy.def to match Src/_numpy.c, which implements the _numpy module. Would this be too much to ask of NumPy? (Paul?) What about other module distributions that support MSVC++ and thus ship with "def" files? Could they be made to accomodate this scheme? Thanks for your feedback -- Greg -- Greg Ward - software developer gward(a)cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913

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Can now compile simple extensions
by Greg Ward 29 Apr '18

29 Apr '18

Hi all -- at long last, I found the time to hack in the ability to compile extension modules to the Distutils. Mainly, this meant adding a 'build_ext' command which uses a CCompiler instance for all its dirty work. I also had to add a few methods to CCompiler (and, of course, UnixCCompiler) to make this work. And I added a new module, 'spawn', which takes care of running sub-programs more efficiently and robustly (no shell involved) than os.system. That's needed, obviously, so we can run the compiler! If you're in the mood for grubbing over raw source code, then get the latest from CVS or download a current snapshot. See http://www.python.org/sigs/distutils-sig/implementation.html for a link to the code snapshot. I'm still waiting for more subclasses of CCompiler to appear. At the very least, we're going to need MSVCCompiler to build extensions on Windows. Any takers? Also, someone who knows the Mac, and how to run compilers programmatically there, will have to figure out how to write a Mac-specific concrete CCompiler subclass. The spawn module also needs a bit of work to be portable. I suspect that _win32_spawn() (the intended analog to my _posix_spawn()) will be easy to implement, if it even needs to go in a separate function at all. It looks from the Python Library documentation for 1.5.2 that the os.spawnv() function is all we need, but it's a bit hard to figure out just what's needed. Windows wizards, please take a look at the 'spawn()' function and see if you can make it work on Windows. As for actually compiling extensions: well, if you can figure out the build_ext command, go ahead and give it a whirl. It's a bit cryptic right now, since there's no documentation and no example setup.py. (I have a working example at home, but it's not available online.) If you feel up to it, though, see if you can read the code and figure out what's going on. I'm just hoping *I'll* be able to figure out what's going on when I get back from the O'Reilly conference next week... ;-) Enjoy -- Greg -- Greg Ward - software developer gward(a)cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913

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Two fixes (at last)
by Greg Ward 29 Apr '18

29 Apr '18

Hi all -- at long last, I have fixed two problems that a couple people noticed a while ago: * I folded in Amos Latteier's NT patches almost verbatim -- just changed an `os.path.sep == "/"' to `os.name == "posix"' and added some comments bitching about the inadequacy of the current library installation model (I think this is Python's fault, but for now Distutils is slavishly aping the situation in Python 1.5.x) * I fixed the problem whereby running "setup.py install" without doing anything else caused a crash (because 'build' hadn't yet been run). Now, the 'install' command automatically runs 'build' before doing anything; to make this bearable, I added a 'have_run' dictionary to the Distribution class to keep track of which commands have been run. So now not only are command classes singletons, but their 'run' method can only be invoked once -- both restrictions enforced by Distribution. The code is checked into CVS, or you can download a snapshot at http://www.python.org/sigs/distutils-sig/distutils-19990607.tar.gz Hope someone (Amos?) can try the new version under NT. Any takers for Mac OS? BTW, all parties involved in the Great "Where Do We Install Stuff?" Debate should take a good, hard look at the 'set_final_options()' method of the Install class in distutils/install.py; this is where all the policy decisions about where to install files are made. Currently it apes the Python 1.5 situation as closely as I could figure it out. Obviously, this is subject to change -- I just don't know to *what* it will change! Greg -- Greg Ward - software developer gward(a)cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913

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Package versioning
by Timothy Docker 29 Apr '18

29 Apr '18

Hi all, I've been aware that the distutils sig has been simmerring away, but until recently it has not been directly relevant to what I do. I like the look of the proposed api, but have one question. Will this support an installed system that has multiple versions of the same package installed simultaneously? If not, then this would seem to be a significant limitation, especially when dependencies between packages are considered. Assuming it does, then how will this be achieved? I am presently managing this with a messy arrangement of symlinks. A package is installed with its version number in it's name, and a separate directory is created for an application with links from the unversioned package name to the versioned one. Then I just set the pythonpath to this directory. A sample of what the directory looks like is shown below. I'm sure there is a better solution that this, and I'm not sure that this would work under windows anyway (does windows have symlinks?). So, has this SIG considered such versioning issues yet? Cheers, Tim -------------------------------------------------------------- Tim Docker timd(a)macquarie.com.au Quantative Applications Division Macquarie Bank -------------------------------------------------------------- qad16:qad $ ls -l lib/python/ total 110 drwxr-xr-x 2 mts mts 512 Nov 11 11:23 1.1 -r--r----- 1 root mts 45172 Sep 1 1998 cdrmodule_0_7_1.so drwxr-xr-x 2 mts mts 512 Sep 1 1998 chart_1_1 drwxr-xr-x 3 mts mts 512 Sep 1 1998 Fnorb_0_7_1 dr-xr-x--- 3 mts mts 512 Nov 11 11:21 Fnorb_0_8 drwxr-xr-x 3 mts mts 1536 Mar 3 12:45 mts_1_1 dr-xr-x--- 7 mts mts 512 Nov 11 11:22 OpenGL_1_5_1 dr-xr-x--- 2 mts mts 1024 Nov 11 11:23 PIL_0_3 drwxr-xr-x 3 mts mts 512 Sep 1 1998 Pmw_0_7 dr-xr-x--- 2 mts mts 512 Nov 11 11:21 v3d_1_1 qad16:qad $ ls -l lib/python/1.1 total 30 lrwxrwxrwx 1 root other 29 Apr 10 10:43 _glumodule.so -> ../OpenGL_1_5_1/_glumodule.so lrwxrwxrwx 1 root other 30 Apr 10 10:43 _glutmodule.so -> ../OpenGL_1_5_1/_glutmodule.so lrwxrwxrwx 1 root other 22 Apr 10 10:43 _imaging.so -> ../PIL_0_3/_imaging.so lrwxrwxrwx 1 root other 36 Apr 10 10:43 _opengl_nummodule.so -> ../OpenGL_1_5_1/_opengl_nummodule.so lrwxrwxrwx 1 root other 27 Apr 10 10:43 _tkinter.so -> ../OpenGL_1_5_1/_tkinter.so lrwxrwxrwx 1 mts mts 21 Apr 10 10:43 cdrmodule.so -> ../cdrmodule_0_7_1.so lrwxrwxrwx 1 mts mts 12 Apr 10 10:43 chart -> ../chart_1_1 lrwxrwxrwx 1 root other 12 Apr 10 10:43 Fnorb -> ../Fnorb_0_8 lrwxrwxrwx 1 mts mts 12 Apr 10 10:43 mts -> ../mts_1_1 lrwxrwxrwx 1 root other 15 Apr 10 10:43 OpenGL -> ../OpenGL_1_5_1 lrwxrwxrwx 1 root other 33 Apr 10 10:43 opengltrmodule.so -> ../OpenGL_1_5_1/opengltrmodule.so lrwxrwxrwx 1 root other 33 Apr 10 10:43 openglutil_num.so -> ../OpenGL_1_5_1/openglutil_num.so lrwxrwxrwx 1 root other 10 Apr 10 10:43 PIL -> ../PIL_0_3 lrwxrwxrwx 1 mts mts 10 Apr 10 10:43 Pmw -> ../Pmw_0_7 lrwxrwxrwx 1 root other 10 Apr 10 10:43 v3d -> ../v3d_1_1

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[Distutils-sig] distutils charter and interscript
by John Skaller 29 Apr '18

29 Apr '18

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bug with get-pip.py?
by Randy Syring 28 Apr '17

28 Apr '17

I've installed Python 3.6 on Ubuntu 14.04 through the dead snakes PPA and I'm trying to get pip installed. $ python3.6 ~/tmp/get-pip.py Traceback (most recent call last): File "/home/rsyring/tmp/get-pip.py", line 20061, in <module> main() File "/home/rsyring/tmp/get-pip.py", line 194, in main bootstrap(tmpdir=tmpdir) File "/home/rsyring/tmp/get-pip.py", line 119, in bootstrap import setuptools # noqa File "/usr/lib/python3/dist-packages/setuptools/__init__.py", line 12, in <module> from setuptools.extension import Extension File "/usr/lib/python3/dist-packages/setuptools/extension.py", line 7, in <module> from setuptools.dist import _get_unpatched File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 16, in <module> import pkg_resources File "/usr/lib/python3/dist-packages/pkg_resources.py", line 1479, in <module> register_loader_type(importlib_bootstrap.SourceFileLoader, DefaultProvider) AttributeError: module 'importlib._bootstrap' has no attribute 'SourceFileLoader' Any ideas? *Randy Syring* Husband | Father | Redeemed Sinner /"For what does it profit a man to gain the whole world and forfeit his soul?" (Mark 8:36 ESV)/

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Idea: Using Trove classifiers for platform compatibility warnings
by Nick Coghlan 24 Apr '17

24 Apr '17

PyPI already has a reasonably extensive component tagging system in https://pypi.python.org/pypi?%3Aaction=list_classifiers but we don't really *use* it all that much for programmatic purposes. That means the incentives for setting tags correctly are weak, since there isn't much pay-off in the form of tooling-intermediated communication of constraints and testing limitations to end users. What I'm starting to wonder is whether or not it may make sense to start recommending that installation tools emit warnings in the following cases: 1. At least one "Operating System" tag is set, but the tags don't include any that cover the *current* operating system 2. At least one "Programming Language :: Python" tag is set, but the tags don't include any that cover the *current* Python version The "at least one relevant tag is set" pre-requisite would be to avoid emitting false positives for projects that don't provide any platform compatibility guidance at all. Instead, the goal would be to eliminate the cases where *incorrect* guidance is currently provided - no guidance at all would be fine, correct guidance would be fine, but incorrect guidance would result in install time warnings on nominally unsupported platforms. Checking for applicable tags at run time would then be a matter of defining two things: - for a given platform, figure out the list of applicable tags that indicate compatibility - for a given platform, figure out the list of applicable tags that indicate *in*compatibility I'm bringing this idea up now as it came up twice for me this week: - in my current work project, where even though the project itself is pure Python, we're manipulating Linux containers and local VM hypervisors, so I put a "Operating System :: POSIX :: Linux" tag on it - in a discussion of using absolute paths in "data_files" where it can be an entirely reasonable thing to do, as long as you're OK with making the affected library or application platform specific: https://github.com/pypa/python-packaging-user-guide/pull/212#issuecomment-2… It's also quite applicable to some of the enhancements Daniel would like to make to the wheel format to support more of the GNU autotools paths (https://www.gnu.org/prep/standards/html_node/Directory-Variables.html), which become a lot more palatable if there's a defined machine readable way of saying "Hey, this project assumes POSIX directory layout conventions" (which would be to set "Operating System :: POSIX" or one of it's more specific variants, given the definitions above). Cheers, Nick. -- Nick Coghlan | ncoghlan(a)gmail.com | Brisbane, Australia

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The sad and insecure state of commercial private package indexes
by Jannis Gebauer 24 Apr '17

24 Apr '17

I did some research on commercial private package indexes, namely Gemfury and packagecloud. Both of them recommend to use `--extra-index-url` as a parameter to point to their own index servers hosting the private package. This is blatantly insecure. Using `--extra-index-url` tells pip to use the server as an _extra_ index url (huge surprise). This basically means that, during pip install, PyPi and the private server share the same namespace. Pip queries both servers for available releases for a given package. On unpinned packages, the server with the latest release seems to win. This means, If I’m using one of these private package indexes, an attacker is able to run arbitrary Python code (through setup.py during installation) simply by guessing my private package names and uploading them to PyPi. I’ve contacted both Gemfury and packagecloud. Gemfury didn’t respond. Packagecloud basically said works as intended, wontfix. They could, of course, fix this very easily by running their own PyPi mirrors. I couldn’t care less about these companies, but I care about Python packaging in general. I talked to a couple of Python developers regarding this. All of them use pip and PyPi regularly but have no idea about the internals. This was a huge surprise to them. My problem with this is that PyPi and pip will look bad if this is ever going to be abused. What are your thoughts on this? — Jannis Gebauer

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CentOS5 is EOL, impact on manylinux1?
by Donald Stufft 13 Apr '17

13 Apr '17

CentOS5 is EOL now and the repositories have been taken offline. Does this impact manylinux1? Do we need to work on a manylinux2? — Donald Stufft

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[issue165] setuptools doesn't use venv on macOs
by Laurent Senta 12 Apr '17

12 Apr '17

New submission from Laurent Senta: Hi, on macOs Sierra (got the issue for at least 2 versions), setuptools appears to be producing commands with the wrong python env when it generates shebangs. I use virtualenvs with python3 (brew install python3), when I pip install commands, they end up using the /Cellar/ python instead of the venv. Here's an example of a session showing the incorrect shebangs: › mkvirtualenv -p python3 bugreport Running virtualenv with interpreter /usr/local/bin/python3 Using base prefix '/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6' New python executable in /Users/laurent/.virtualenvs/bugreport/bin/python3.6 Also creating executable in /Users/laurent/.virtualenvs/bugreport/bin/python Installing setuptools, pip, wheel...done. virtualenvwrapper.user_scripts creating /Users/laurent/.virtualenvs/bugreport/bin/predeactivate virtualenvwrapper.user_scripts creating /Users/laurent/.virtualenvs/bugreport/bin/postdeactivate virtualenvwrapper.user_scripts creating /Users/laurent/.virtualenvs/bugreport/bin/preactivate virtualenvwrapper.user_scripts creating /Users/laurent/.virtualenvs/bugreport/bin/postactivate virtualenvwrapper.user_scripts creating /Users/laurent/.virtualenvs/bugreport/bin/get_env_details (bugreport) # pip is correct › which pip /Users/laurent/.virtualenvs/bugreport/bin/pip › head -n1 `which pip` #!/Users/laurent/.virtualenvs/bugreport/bin/python3.6 # pip install django pytest ipython... › which django-admin /Users/laurent/.virtualenvs/bugreport/bin/django-admin › head -n1 `which django-admin` #!/usr/local/Cellar/python3/3.6.1/bin/python3.6 › which pytest /Users/laurent/.virtualenvs/bugreport/bin/pytest › head -n1 `which pytest` #!/usr/local/Cellar/python3/3.6.1/bin/python3.6 › which ipython /Users/laurent/.virtualenvs/bugreport/bin/ipython › head -n1 `which ipython` #!/usr/local/Cellar/python3/3.6.1/bin/python3.6 ---------- messages: 787 nosy: lsenta priority: bug status: unread title: setuptools doesn't use venv on macOs _______________________________________________ Setuptools tracker <setuptools(a)bugs.python.org> <http://bugs.python.org/setuptools/issue165> _______________________________________________

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