Mailman 3 April 2008 - Distutils-SIG

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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Re: [Distutils] how to easily consume just the parts of eggs that are good for you
by Stanley A. Klein 09 Oct '09

09 Oct '09

On Wed, April 9, 2008 10:05 pm, Greg Ewing <greg.ewing(a)canterbury.ac.nz> wrote: > Message: 4 > Date: Thu, 10 Apr 2008 12:59:39 +1200 > From: Greg Ewing <greg.ewing(a)canterbury.ac.nz> > Subject: Re: [Distutils] how to easily consume just the parts of eggs > that are good for you > To: distutils-sig(a)python.org > > Paul Moore wrote: > >> I believe that Mac OS X goes for an even simpler structure - >> applications store *everything* in the one directory, so that >> install/uninstall is simply a directory copy/remove. > > Yep, and thereby cuts the whole gordian knot, throws the > pieces on the fire and burns them. :-) > > Package managers have always seemed to me to be an > excessively complex solution to a problem that needn't > have existed in the first place. > > I keep hoping that someday Linux will support something > like MacOSX application bundles and frameworks, but I > haven't seen any sign of it yet. > I think this discussion arises because the operating systems we are dealing with are based on very different concepts. Windows and Mac are fundamentally single user systems that have added capabilities for multiple users and are intended to be used with proprietary software. Those considerations lead to minimal dependencies among packages (each proprietary provider needs to control its own package, except for the OS), individual users serving as their own sysadmins, and similar factors. Any dependencies in the proprietary software are hidden from the user because the provider has compiled the dependencies into the binary code they supply. Unix/Linux are fundamentally multi-user systems with a distinct role for a sysadmin. Linux and the BSD's are intended to be used with Free/Open Source Software (FOSS), and Unix originated the Software Tools concept in which individual, relatively simple, separately-developed tools are combined to perform complex tasks. Both FOSS and the Software Tools concept encourage dependencies. The need for package managers arises out of the Unix FHS. If you look at the FHS, it is clearly designed to simplify the job of the sysadmin in a multi-user system that uses FOSS and Software Tools. For example, deciding what to backup and how often to do it in a Unix/Linux system is relatively easy for the sysadmin. All the installed software is in certain top-level directories. All the config files are in /etc. All the logs. caches, spools, web pages, process locks, and certain other data are in /var. All the user data is in /home or its sysadmin-determined equivalents. If the sysadmin needs space, deleting files in /tmp will not cause a problem. In summary, Python is being used on systems that have very different underlying OS use cases. To some extent, the natural use case for Python is closest to that of Linux/Unix. Running Python on Windows/Mac requires adapting for those platforms some of the kinds of tools that simplify operations on Linux/Unix systems. This discussion is essentially about how far that goes, how to accomplish it, and how to remain compatible with the existing tools on Linux/Unix. Stan Klein

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eggs and Python Unicode variants (UCS2, UCS4)
by Martijn Faassen 29 May '09

29 May '09

Hi there, In the lxml project (http://codespeak.net/lxml), we've just noticed the following problem with lxml eggs: you can easy_install an egg that won't work for your Python. This is because Python can be compiled with either 2 or 4 bytes unicode as its internal representation. Any egg that contains compiled C code that uses unicode such as lxml will run into trouble: if it's compiled with a 4 bytes unicode Python, it won't work on a 2 bytes unicode Python, and vice versa. This problem is fairly common in Linux. Many distributions such as Ubuntu and Fedora compile their python with 4 bytes unicode internal representation. If you compile a Python interpreter by hand it defaults to 2 bytes unicode, however. Hand-building a Python interpreter is done fairly commonly by Linux sysadmins for various reasons. It would therefore be very nice if it became possible to make eggs for the different unicode compilation options of Python. This configuration dimension is a real world issue for any binary Python module that does anything with unicode text.. In an earlier mail to this list: http://mail.python.org/pipermail/distutils-sig/2005-October/005222.html M.-A. Lemburg and Phillip Eby had the following discussion: [MAL] >>Please make sure that your eggs catch all possible >>Python binary build dimensions: >> >>* Python version >>* Python Unicode variant (UCS2, UCS4) >>* OS name >>* OS version >>* Platform architecture (e.g. 32-bit vs. 64-bit) [PJE] >As far as I know, all of this except the Unicode variant is captured in >distutils' get_platform(). And if it's not, it should be, since it >affects any other kind of bdist mechanism. I'm not sure whether this means this needs to be escalated from setuptools to the Python interpreter level itself. With this mail, I've done the job escalating this lxml problem to what appears to be the right place, though. :) Thanks, Martijn

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unicode bug in distutils
by Tarek Ziadé 05 Apr '09

05 Apr '09

Hello, I have created a setup.py file for distirbution and I bumped into a small bug when i tried to set my name in the contact field (Tarek Ziadé) Using string (utf8 file): setup( maintainer="Tarek Ziadé" ) leads to: File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/distutils/command/register.py", line 162, in send_metadata auth) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/distutils/command/register.py", line 257, in post_to_server value = unicode(value).encode("utf-8") UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 10: ordinal not in range(128) Using unicode: setup( maintainer=u"Tarek Ziadé" ) leads to: File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/distutils/dist.py", line 1094, in write_pkg_file file.write('Author: %s\n' % self.get_contact() ) UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position 18: ordinal not in range(128) I would propose a patch for this problem but i don't know what would be the best input (i guess unicode for names) Regards Tarek -- Tarek Ziadé | Association AfPy | www.afpy.org Blog FR | http://programmation-python.org Blog EN | http://tarekziade.wordpress.com/

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Unicode in distutils meta-data
by Tarek Ziadé 03 Sep '08

03 Sep '08

Hello, I would like to summarize here http://bugs.python.org/issue2562. Currently, distutils does not allows the usage of Unicode for some meta-data fields that should be able to use it. These fields are: - author - maintainer - description - long_description For instance, if you use u"Barnabé" in the author field, the DistributionMetada.write_pkg_file will fail when it tries to serialize the information into a file. The problem is that the current implementation makes the assumption that all fields are ascii string. This won't be a problem in Python 3k, of course, but currently concerns the 2.x series. One possible solution would be to move these fields to Unicode for the 2.6 series. In the meantime, many people are using str type for those fields, so as Martin mentioned, a backward compatibility would be better to support either plain string either Unicode. Other fields should be left imho in ascii, since an url for instance has to be ascii. But maybe it would be better, as Martin mentioned, to use Unicode for all fields. In any case, if we do use Unicode for some fields, we will need to provide the codec to be used to serialize the data in a file. My proposal here would be to add a 'encoding' field in the metadata that defaults to 'utf8', and that would let people explicitely indicates the encoding. I have written a quick patch here of a possible implementation, so you can see the problem : http://bugs.python.org/file9967/unicode.metadata.patch Regards, Tarek -- Tarek Ziadé | Association AfPy | www.afpy.org Blog FR | http://programmation-python.org Blog EN | http://tarekziade.wordpress.com/

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[PATCH][setuptools] Add test_runner support to setup
by Klaus Zimmermann 22 Aug '08

22 Aug '08

Hi all, for our nightly build system I needed the capability to use a different test runner, namely one that outputs junit compatible xml files. In order to support that through the setup.py test command I hacked on setuptools. Is there a simpler way to do this? If not you might want to consider attached patch for addition (Should be against latest svn.) Cheers, Klaus

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buildout: setting envirionment variables for zc.recipe.egg:custom?
by Christian Zagrodnick 24 Jun '08

24 Jun '08

Hi, building lxml requires additional configuration so it finds xslt-config correctly. One possibility is to set the PATH environment variable. The other is to call setup.py --xslt-config=... Using setup.py --xslt-config doesn't fit at all into buildout i think. Setting environment variables before installing an egg on the other hand might be useful. Would it make sense to put this into zc.recipe.egg or would it be better to create some unrelated recipe which only sets envirionment variables? Regards, -- Christian Zagrodnick gocept gmbh & co. kg · forsterstrasse 29 · 06112 halle/saale www.gocept.com · fon. +49 345 12298894 · fax. +49 345 12298891

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Re: [Distutils] shebang line modified by setuptools
by Phillip J. Eby 07 May '08

07 May '08

At 09:07 PM 4/11/2008 -0700, Cliff Wells wrote: >Hi Phillip, > >I recently upgraded a hosting server from Python 2.4 to Python 2.5. >Many of the sites on this server couldn't easily be upgraded to 2.5 (at >least not in a timely fashion), so my interim solution was to simply >symlink ~/bin/python -> /usr/bin/python2.4 (~/bin is first in the user's >PATH). This worked swimmingly except for applications which relied on >Paste (I should note I use the method outlined here: >http://peak.telecommunity.com/DevCenter/EasyInstall#administrator-installat…). > >The reason the Paste apps had an issue is because apparently setuptools >modifies the shebang line of paster to be "#!/usr/bin/python". This >hardcoded path overrides any PATH settings. I understand that this is >done at the time Paste is installed to tie it to the installed version >of Python. This makes sense, except that it doesn't do what it's >intended to when Python is upgraded (/usr/bin/python is no longer the >version it was installed with). > >It seems the correct solution to this is to use "#!/usr/bin/env >python" (or rather, evaluate `which env` to account for some systems >which have /bin/env rather that /usr/bin/env) which allows the sys admin >to override the Python binary much more easily. No, it isn't the correct solution. The correct solution is to re-run easy_install on the target -- it will leave the existing installed code in place, but regenerate the scripts with headers pointing to the currently-in-use Python. Even that is often not as good an idea as reinstalling for a new version of Python; some packages (notably, setuptools itself, but I have others) include different code and data depending on the Python version they are built for. For example, a package built for Python 2.5 might not include dependency specs for ctypes, sqlite, or wsgiref, but the same package might need to specify those dependencies on earlier versions of Python. By the way, please don't send me unsolicited private emails about setuptools unless you're a client or potential client. There's a reason that every single official web page about setuptools directs you to email the distutils-sig. I don't do private email for ANY of my open source projects, unless you're a client or looking to be one. Mailing lists have searchable archives, meaning that my time answering a question is being offset by its potential utility to a much larger audience. Thanks.

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setuptools on 64 bit Windows broken?
by Jeroen Ruigrok van der Werven 02 May '08

02 May '08

[Apologies if this was discussed in the past, I did some searching but couldn't find much, but then again my attention is spread a little too thing lately.] Right now setuptools on Windows x64 with 64-bits Python 2.5 is (partially) broken. The error shown is: Cannot find Python executable C:\Python25\python.exe when running easy_install. The phrase comes from launcher.c which is compiled via MingW to cli.exe and gui.exe. Both of these are present in the setuptools repository and are 32-bits only for all I can determine (using file). I have not thoroughly checked it yet (due to being written in Unix-C, even though it's aimed at Windows), but my guess is it's using some API calls which fail on 64-bits Windows. I see there's a mingw-64 toolkit on the 'net nowadays. Has anyone tried this yet? Is it indeed an API issue? Furthermore, when creating an egg on Windows x64, it will create it with an identifier of win32, even though C code in a project is compiled with an AMD64 version of the compiler. For all I know 32-bits Windows systems will also pull down this version of the egg when given the chance. I guess this is due to Python 2.5 64 bit reporting win32 for sys.platform? So don't we miss something to properly distinguish between 64 bits Windows and 32 bits? Especially with x64 and Vista 64 on the market nowadays? Thanks for any pointers/clues... -- Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai イェルーンラウフロックヴァンデルウェルヴェン http://www.in-nomine.org/ | http://www.rangaku.org/ | GPG: 2EAC625B Whoever undertakes to set himself up as judge in the field of truth and knowledge is shipwrecked by the laughter of the Gods.

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