From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.windriver.com ([147.11.1.11]) by linuxtogo.org with esmtp (Exim 4.72) (envelope-from ) id 1Qocha-0006B5-6Q for openembedded-core@lists.openembedded.org; Wed, 03 Aug 2011 16:45:43 +0200 Received: from ALA-HCA.corp.ad.wrs.com (ala-hca [147.11.189.40]) by mail.windriver.com (8.14.3/8.14.3) with ESMTP id p73EfIAM006693 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Wed, 3 Aug 2011 07:41:18 -0700 (PDT) Received: from Macintosh-5.local (172.25.36.226) by ALA-HCA.corp.ad.wrs.com (147.11.189.50) with Microsoft SMTP Server id 14.1.255.0; Wed, 3 Aug 2011 07:41:17 -0700 Message-ID: <4E395E0C.8010308@windriver.com> Date: Wed, 3 Aug 2011 09:41:16 -0500 From: Mark Hatle Organization: Wind River Systems User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:5.0) Gecko/20110624 Thunderbird/5.0 MIME-Version: 1.0 To: References: <1312292802.4325.33.camel@phil-desktop> <4E380E7E.9050803@windriver.com> <1312374036.2344.658.camel@rex> In-Reply-To: <1312374036.2344.658.camel@rex> Subject: Re: [PATCH 5/5] update-alternatives: Add alternatives as a runtime provide X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.11 Precedence: list Reply-To: Patches and discussions about the oe-core layer List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Aug 2011 14:45:43 -0000 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit On 8/3/11 7:20 AM, Richard Purdie wrote: > On Tue, 2011-08-02 at 09:49 -0500, Mark Hatle wrote: >> On 8/2/11 8:46 AM, Phil Blundell wrote: >>> On Mon, 2011-08-01 at 19:17 -0500, Mark Hatle wrote: >>>> The following allows RPM to generate the SDK image, however without it >>>> we get a failure because the system has nothing that provides /bin/sh. >>>> >>>> Unfortunately the patch causes failures with ipk and deb packages because >>>> they can not have filenames within their RPROVIDES. I'm looking for some >>>> type of a resolution to the issue, the only thing I can think of is to >>>> add a way to manually add a FILERPROVIDE for the items. This will require >>>> changes to the way FILERPROVIDE is currently generated... but I'm not sure >>>> how we can automatically generate the FILERPROVIDE values without the use of >>>> python... >>>> >>>> Any suggestions? >>> >>> It's never really been the intent that update-alternatives should put >>> the name of the link being provided into RPROVIDES. If you want to >>> solve the specific problem with /bin/sh then just adding RPROVIDES_${PN} >>> += "virtual-bourne-shell" or something to bash and busybox is probably >>> the easiest way of doing that. >>> >>> I wouldn't be entirely opposed to the concept of what you're proposing >>> here, though. Something like: >>> >>> RPROVIDES_${PN} += "${@' '.join(map(lambda x: >>> legitimize_package_name("virtual-path-" + x), filter(lambda x: x != '', >>> [ d.getVar('ALTERNATIVE_LINK', True) or '' ] + >>> (d.getVar('ALTERNATIVE_LINKS', True) or '').split())))}" >>> >>> might be what you want, perhaps. I'm not sure that the resulting >>> virtual names will be very pretty though. >> >> Hmm.. Coming from the RPM world, the virtual-path- because we can't just >> "provide" a file in the system seems a bit wonky to me. But it should be able >> to work. For RPM at least, we'd want a reversing function to turn virtual paths >> back into real paths. >> >> If I have time today, I'll try to implement a proof of concept and see if I can >> get it to work reasonably well. > > Just to be clear for Phil's benefit, RPM natively supports file based > dependencies, so a dependency of "/bin/sh" is automatically fulfilled by > a package which contains "/bin/sh". Some dependencies such as the > shebang in scripts are automatically added to packages and resolved by > rpm. > > I did chase down this bug a bit and it seems that if you "bitbake > meta-toolchain-game" you hit an error about /bin/sh being missing but if > you "bitbake busybox; bitbake meta-toolchain-gmae" it will work. This is > due to busybox shipping a /bin/sh. > > The question is therefore how to handle this on the deb/ipk side and > ensure we get consistency between the behaviours of the different > backends. I thought with the rpm filedeps code in do_package, we were > adding things like /bin/sh dependencies to the other package formats but > now I'm not so sure. Due to deb/ipk not handling file based dependencies, they are filtered out on the creation of the deb/ipk packages. The original intention was to use them, but it wasn't possible at the time. Simply adding a ton of file-based dependencies seemed like a huge mistake as well. (We'd have to add virtual provides for all of the virtual requirements....) We could certainly select a few specific requirements and scan for and use those to catch obvious issues, such as perl, sh, bash, env/python... but it's still only a partial solution to the real issue. --Mark > Cheers, > > Richard > > > > > > _______________________________________________ > Openembedded-core mailing list > Openembedded-core@lists.openembedded.org > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core