December 2007 - Zope

ZPL and GPL: What should one consider when choosing a license?
by Ross Patterson 27 Dec '07

27 Dec '07

Recently, someone wrote to me regarding one of my z3c packages which is licensed under the GPL. They asked me to license them under the ZPL saying that the ZPL would allow the widest range of use for those packages. They also implied that using the GPL impacted the licensing of other code that uses mine. Mostly this is just a debate I've never taken up before. I've always just chosen the GPL because it's the most aligned with my values and ideals on a "visceral" level. IOW, it's a gut choice not an educated choice. I realize this is an old debate. I found some lengthy threads on zope-dev from 2001, but I think there have been some license changes since then. I also read the following blog posts: http://radio.weblogs.com/0116506/2005/11/21.html#a370 http://awkly.org/2005/11/21/gpl-considered-harmful/ Unfortunately, the comment by Chris McDonough mentioned in the latter doesn't seem to be accessible any more. I'd love to read it. >From those blog posts, I don't really see any corroboration of the claims of the person who made the request that I switch to the ZPL. What exactly about the GPL narrows the range of developers who can use my code? What about the GPL impacts the license of other code that depends on my code? Here's what I want. I want anyone who modifies or forks my code to make their modifications just as accessible to myself and the community as my code is in the first place. I also want anyone who forks my code to credit me and other contributors as authors of the code they forked. I have a slight preference to allow proprietary code to depend on my code without having to open source their code. I definitely want commercial entities to be allowed to sell products and services that include my code as long as credit is given to the authors. That's just what I want from my admittedly naive perspective. I'd like to hear comments on why others think I should or shouldn't want any of those things from a license. I'd also like to hear how others think the license available relate to what I want from a license. Thoughts? Is there documentation somewhere about choosing a license? Maybe a howto I missed in my googling? Ross

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Problem w/ Fresh Build
by Victor Subervi 24 Dec '07

24 Dec '07

Hi; I'm building Z29 on a new FBSD62 server from port. I've done this before with no problem. I followed the instructions exactly. Now, I get this: 2007-12-24 22:26:50 ERROR Zope Could not import Products.ATContentTypes Traceback (most recent call last): File "/usr/local/www/Zope29/lib/python/OFS/Application.py", line 708, in import_product File "/usr/local/zope/Products210/ATContentTypes/__init__.py", line 37, in ? from Products.ATContentTypes.config import HAS_LINGUA_PLONE File "/usr/local/zope/Products210/ATContentTypes/config.py", line 30, in ? from Products.ATContentTypes.configuration import zconf File "/usr/local/zope/Products210/ATContentTypes/configuration/__init__.py", line 25, in ? from Products.ATContentTypes.configuration.config import zconf File "/usr/local/zope/Products210/ATContentTypes/configuration/config.py", line 29, in ? from Products.ATContentTypes.configuration.schema import atctSchema File "/usr/local/zope/Products210/ATContentTypes/configuration/schema.py", line 29, in ? from Products.ATContentTypes.configuration import datatype File "/usr/local/zope/Products210/ATContentTypes/configuration/datatype.py", line 25, in ? from Products.CMFCore import permissions as CMFCorePermissions File "/usr/local/zope/Products210/CMFCore/__init__.py", line 24, in ? import five.localsitemanager File "/usr/local/zope/Products210/CMFCore/src/five/localsitemanager/__init__.py", line 2, in ? from zope.component.globalregistry import base ImportError: No module named globalregistry Traceback (most recent call last): File "/usr/local/zope/295/lib/python/Zope2/Startup/run.py", line 56, in ? run() File "/usr/local/zope/295/lib/python/Zope2/Startup/run.py", line 21, in run starter.prepare() File "/usr/local/zope/295/lib/python/Zope2/Startup/__init__.py", line 98, in prepare self.startZope() File "/usr/local/zope/295/lib/python/Zope2/Startup/__init__.py", line 257, in startZope Zope2.startup() File "/usr/local/zope/295/lib/python/Zope2/Startup/__init__.py", line 47, in startup starter.setConfiguration(cfg) File "/usr/local/www/Zope29/lib/python/Zope2/App/startup.py", line 46, in startup File "/usr/local/www/Zope29/lib/python/OFS/Application.py", line 685, in import_products File "/usr/local/www/Zope29/lib/python/OFS/Application.py", line 723, in import_product KeyError TIA, Victor

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Re: ZPL and GPL: What should one consider when choosing a license?
by Tres Seaver 23 Dec '07

23 Dec '07

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Alex Turner wrote: > On Dec 21, 2007 7:56 PM, Ross Patterson <me(a)rpatterson.net> wrote: > >> Chris McDonough <chrism(a)plope.com> writes: >> >>> On Dec 21, 2007, at 3:53 PM, Ross Patterson wrote: >>>> Unfortunately, the comment by Chris McDonough mentioned in the latter >>>> doesn't seem to be accessible any more. I'd love to read it. >>> It said: >>> >>> """ >>> I don't think Plone is "bad" because it uses the GPL. I do think it's >>> a pain in the balls to have to ask authors of various GPL things if >>> they're willing to relicense ZPL or other BSD-type license in order to >>> be able to incorporate their software into CMF or Zope (as required by >>> the ZC contributor's agreement in order to check it into either of >>> those projects). It just puts up a big enough impediment to sharing >>> code that the codebases don't intermingle much. >>> What's gauche about using the GPL is that at least by default, the >>> Plone guys don't need to ask the Zope guys if they can ship their >>> software. They get the benefit (or pain ;-) of shipping it all without >>> any extra work. But the Zope guys need to go track down the copyright >>> owners of various bits of Plone code and get all of their permissions >>> to ship their software in CMF or Zope via a relicense. That's just >>> hurts collaboration badly. It's anti-sharing which I think is >>> practically just gauche. >>> """ >> Thanks for digging that up, its a really good point to have in the mix >> here. >> > > au contraire - it is the ZPL which is anti-sharing in my estimation. You do > not have to contribute changes back to a project which you extend in a BSD > style license, so you can take a BSD style licensed product, extend it, and > sell it without giving a single thing back to the original author of the > original system except a credit note in the copyright statement. > > BSD and ZPL is share and do what you like > GPL is share and share alike > > Thats the core philosophy difference. If you like others to share too, then > use GPL or LGPL (possibly AGPL actually, GPL doesn't gaurentee much of > anything for application service providers as I've found out, which is > probably most people using Plone etc.), if you want to give your code away > then use BSD/ZPL, if you want changes back, then use AGPL. And if you think > it wont happen, it already did. Microsoft took the BSD Kerberos code and > re-purposed it into Windows, changed the protocol slightly and pissed off > many people. Rehashing GPL vs ZPL is off topic here, because the ZPL is the *mandated* license for any code contributed into the zope.org repository: that choice is not subject to debate. Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 tseaver(a)palladion.com Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHbVOS+gerLs4ltQ4RAkKMAKC4Y6jhdzV+hvWmg2fTKYWBhhRsLwCfbyd9 6oeMLkDGQCN1ucjkPzow/A8= =uNGH -----END PGP SIGNATURE-----

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Re: ZPL and GPL: What should one consider when choosing a license?
by Ricardo Newbery 22 Dec '07

22 Dec '07

On Dec 21, 2007, at 9:48 PM, Alex Turner wrote: > > au contraire - it is the ZPL which is anti-sharing in my > estimation. You do not have to contribute changes back to a > project which you extend in a BSD style license, so you can take a > BSD style licensed product, extend it, and sell it without giving a > single thing back to the original author of the original system > except a credit note in the copyright statement. > > BSD and ZPL is share and do what you like > GPL is share and share alike > > Thats the core philosophy difference. If you like others to share > too, then use GPL or LGPL (possibly AGPL actually, GPL doesn't > gaurentee much of anything for application service providers as > I've found out, which is probably most people using Plone etc.), if > you want to give your code away then use BSD/ZPL, if you want > changes back, then use AGPL. And if you think it wont happen, it > already did. Microsoft took the BSD Kerberos code and re-purposed > it into Windows, changed the protocol slightly and pissed off many > people. I would be careful about using labels like "anti-sharing" to describe individual licenses. As you acknowledged, both licenses are used to "share" software. ZPL-shared software comes with few strings attached. GPL-shared software comes the "share alike" string attached. It's a bit of a semantic question which is more true to the spirit of *sharing* so I'm going skip that debate. Chris McDonough didn't appear to label the GPL as "anti-sharing". On the contrary, it's the existence of *both* licenses in the same community that he appears to describe as anti-sharing. And since in the Zope community, the ZPL came first and is the core license, it's a legitimate complaint that it's the later adoption of a different license by a subcommunity that is the primary culprit. Ric (a licensing agnostic)

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Re: [Zope] Re: urlparse equivalent
by José Henrique 18 Dec '07

18 Dec '07

> David Bear skrev: > > On Fri, Dec 14, 2007 at 09:16:54PM +0000, peter(a)fry-it.com wrote: > > > I'm a little suprised that there isn't anything like urlparse > > functionaly in zope. I would think parsing urls would be a fairly > > common chore. Which leads me to think that I may be thinking > > completely wrong about what I want to accomplish. > I wrote a script python to substitute urlparse. You can find it in http://paste.plone.org/18656. To use it (assuming that you name it URL) follow this example: url = context.URL() scheme, location, path, parameters, query, fragment = u.urlparse(some_url) Hope it helps. Zénrique.

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Problems creating plone3_buildout on Windows
by kamal hamzat 18 Dec '07

18 Dec '07

Hello, These are the messages i got when I issue this statement: paster create -t plone3_buildout optilux8005. Creating template plone3_buildout Creating directory .\optilux8005 Copying README.txt to .\optilux8005\README.txt Copying bootstrap.py to .\optilux8005\bootstrap.py C:\Python24\lib\site-packages\cheetah-2.0.1-py2.4.egg\Cheetah\Compiler.py:1531: UserWarning: You don't have the C version of NameMapper installed! I'm disabling Cheetah's us eStackFrames option as it is painfully slow with the Python version of NameMappe r. You should get a copy of Cheetah with the compiled C version of NameMapper. warnings.warn( Copying buildout.cfg_tmpl to .\optilux8005\buildout.cfg Recursing into products Creating .\optilux8005\products/ Copying README.txt to .\optilux8005\products\README.txt Recursing into src Creating .\optilux8005\src/ Copying README.txt to .\optilux8005\src\README.txt Recursing into var Creating .\optilux8005\var/ Copying README.txt to .\optilux8005\var\README.txt ----------------------------------------------------------- Generation finished You probably want to run python bootstrap.py and then edit buildout.cfg before running bin/buildout -v See README.txt for details ----------------------------------------------------------- C:\>cd optilux8005 C:\optilux8005>python bootstrap.py Creating directory 'C:\\optilux8005\\bin'. Creating directory 'C:\\optilux8005\\parts'. Creating directory 'C:\\optilux8005\\eggs'. Creating directory 'C:\\optilux8005\\develop-eggs'. Generated script 'C:\\optilux8005\\bin\\buildout'. C:\optilux8005>cd bin C:\optilux8005\bin>buildout While: Initializing. Error: Couldn't open C:\optilux8005\bin\buildout.cfg I am using Zope 2.10.5-final, python 2.4.4, win32. Thanks

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Using zoperoot.misc_.MyProduct
by Peter Bengtsson 16 Dec '07

16 Dec '07

As far as I can see, an advantage with attaching static stuff to OFS.misc_.MyInstalledProduct is that it becomes available globally which makes sense to avoid loading a different icon URL for each www icon in the ZMI of a product. Makes sense also for example if you have one Zope with 10 different instances because then there's just one on /misc_/MyProduct/screen.css to cache and download for the browser if you've placed a static file there called that. A drawback seems to be that errors happening in /misc_/MyProduct/static-content isn't reported in the error_log. This makes it hard to spot bugs in objects in there and, more commonly, NotFound errors. Is there anything I can do about that or should I not expect so much and instead use the instance? -- Peter Bengtsson, work www.fry-it.com home www.peterbe.com hobby www.issuetrackerproduct.com

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urlparse equivalent
by David Bear 15 Dec '07

15 Dec '07

I wanted to use urlparse to handle manage some url rewrites but it's not importable.. Is there any zope functional equivelent that I can use to parse urls? -- David Bear phone: 602-496-0424 fax: 602-496-0955 College of Public Programs/ASU University Center Rm 622 411 N Central Phoenix, AZ 85007-0685 "Beware the IP portfolio, everyone will be suspect of trespassing"

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Appending to a file via manage_edit?
by Jeff Gentry 14 Dec '07

14 Dec '07

I've been looking around for this, but can't seem to find anything. I'm assuming that it is just not possible, but thought I'd ask just in case. For File objects, I see that manage_edit() has the parameters: title, content_type, precondition, filedata & REQUEST. Setting something in the filedata parameter will replace the file's current data with that. This implies (to me at least) that the only way one can edit a file is a complete rewrite. Does there exist a way to simply append data to the end of the file? For instance, if one wanted to write to a file line by line, is that possible in Zope? Thanks

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Re: Zope Digest, Vol 43, Issue 10
by Yuri 13 Dec '07

13 Dec '07

>> Appending data would require the manipulation of the linked list of >> Pdata elements. There is no API for this available...so basically >> forget it. >> > > I figured it'd be a lot more obvious if it was possible. Ah well. > > Thanks > -J > In this case, just use an external method to manipulate a fs file :) This file can be mapped with ExFile to zope, so you can use it in zope.

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