Date: Wed, 12 Oct 2016 19:43:04 +1100 From: Kubilay Kocak <koobs@FreeBSD.org> To: Matthew Seaman <matthew@FreeBSD.org>, freebsd-ports@freebsd.org Subject: Re: harder and harder to avoid pkg Message-ID: <409bd2ed-0836-a2dc-a62b-1651b36370d7@FreeBSD.org> In-Reply-To: <29bf92f3-994f-e695-431a-dc73a3f9c19d@FreeBSD.org> References: <638fe078-80db-2492-90be-f1280eb8d445@freebsd.org> <29bf92f3-994f-e695-431a-dc73a3f9c19d@FreeBSD.org>
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On 12/10/2016 5:55 PM, Matthew Seaman wrote: > On 11/10/2016 19:59, Julian Elischer wrote: >> As the number of dependencies between packages get ever higher, it >> becomes more and more difficult to compile packages and the >> dependence on binary precompiled packages is increased. However >> binary packages are unsuitable for some situations. We really need >> to follow the lead of some of the Linux groups and have -runtime >> and -devel versions of packages, OR we what woudlbe smarter, >> woudl be to have several "sub manifests" to allow unpacking in >> different environments. >> >> >> A simple example: libxml2 >> >> This package installs include files and libraries and dicumentation >> etc. >> >> yet if I build an appliance , I want it to only install a singe >> file. >> >> /usr/local/lib/libxml2.so.2 >> >> >> The presence of this file will satisfy any runtime dependencies of >> packages that require it. >> >> Unfortunately there is no way to install just this file, and still >> report that we have the package loaded, so >> >> pkg will always try to reinstall it leading to a huge mess. >> >> My current scheme is to unpack all packages into a larger staging >> area, and *manually* (scripted) copy out only the files I need, and >> then copy the pkg database, so that when run on the running >> appliance, pkg THINKS all the packages are loaded on the appliance, >> even though only the runtime files are installed. This is what we >> in the industry call "a hack" :-) It is also not robust in the >> face of changing pkg versions. >> >> It would be a lot better it pkg knew it was being asked to install >> only the runtime set, and coudl accurately store this information >> in its database, allowing it to satisfy the needs of other packages >> that need that dependnency only in a runtime manner. >> >> Is any of this possible at the moment? >> >> suggestions from the ports/pkg community are appreciated.. >> >> Julian > > You are describing the 'sub-packages' concept that has been knocking > around for some time. With sub-packages you'ld divide up the result > of staging each port into various chunks: Yep, like this: Mar 6 2016 - https://reviews.freebsd.org/D5563 Ports framework "variants" proof-of-concept (with poudriere support) Status Report Dec 2015 - Supporting Variants in the Ports Framework https://www.freebsd.org/news/status/report-2015-10-2015-12.html#Supporting-Variants-in-the-Ports-Framework > - binaries + config file samples + required data files (the core pkg > content) - shlibs - debug symbols - docs - examples - c/c++ headers > and static or profiling libs (ie. only required for compilation) - > various additional plugins etc. currently controlled by port options > > Each of these would be packaged separately and can be used > independently for resolving dependencies. Building each port would > result in as many of these sub packages as are applicable. > > Turning OPTIONS into sub-packages will also significantly reduce the > number of OPTIONS settings needed in the ports tree (I think bapt had > an estimate of about a 70% reduction but ICBW) and make the pkg > system significantly better able to handle more varied user > requirements without users having to compile their own packages. > > Unfortunately attention has been diverted while there's a lot of > work going on towards packaging base. The problem as far as ports > are concerned is producing several packages out of one port -- it's > not rocket science level of difficulty to make that change, but the > assumption of a one-to-one correspondence between ports and packages > is deeply rooted, and it's going to take a lot of work to unpick. Mar 6 2016 - https://reviews.freebsd.org/D5563 Ports framework "variants" proof-of-concept (with poudriere support) > Happily, the package sets produced for the base system are already > divided along these lines, so with a packaged base it is really very > easy to produce a stripped down and streamlined base system. > > Cheers, > > Matthew
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