Date: Wed, 29 May 2019 12:56:53 +0300 From: Peter Pentchev <roam@ringlet.net> To: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net> Cc: Theron <theron.tarigo@gmail.com>, Bakul Shah <bakul@bitblocks.com>, freebsd-hackers@freebsd.org, soc-status@freebsd.org, freebsd-ports@freebsd.org Subject: Re: GSoC: Separation of Ports Build Process from Local Installation Message-ID: <20190529095653.GN18665@straylight.m.ringlet.net> In-Reply-To: <201905290328.x4T3Sfep018873@gndrsh.dnsmgr.net> References: <5cdb1c0b-a2dd-c754-daa3-187330ad9ad6@gmail.com> <201905290328.x4T3Sfep018873@gndrsh.dnsmgr.net>
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On Tue, May 28, 2019 at 08:28:41PM -0700, Rodney W. Grimes wrote:
> [ Charset UTF-8 unsupported, converting... ]
> > Hello All,
> >
> > For Google Summer of Code 2019 I am working on FreeBSD's ports tree
> > makefiles towards eliminating the dependency of the ports building
> > process on the local system's installed packages.? Currently this level
> > of separation can only be accomplished in practice through chroot or
> > Jail.? The project will eliminate the need for cooperation of the root
> > user since /usr/local will not need to be touched.
> >
> > The major technical obstacle to be overcome is that ports expect to find
> > files of their dependencies installed in /usr/local.? To support this
> > without touching that location on the installed system, file accesses
> > will be redirected to a location controlled by the ports build process
> > through use of a library to intercept file accesses.
>
> Assumption of /usr/local was considered wrong long long ago and it
> should always be ${PREFIX}. Any place that actually assumes this
> value to be /usr/local should be fixed.
>
> Had this policy been properly maintained it would simply be a mater
> of changing ${PREFIX} to a new and empty place before starting
> a ports build and things should of just worked.
>
> Restoration to this ancient and functional behavior is desirable
> at least on my part.
Hmm, I could be wrong, but isn't ${LOCALBASE} supposed to be where
ports find stuff *during the build*, and ${PREFIX} where they
install the built files? Of course, I haven't actually touched
a FreeBSD ports build in years, so I might very likely be wrong.
I also seem to remember a series of test port builds done a long
time ago with a different value for LOCALBASE, specifically to catch
ports that do not honor the policy in this regard.
> > Once I have that working (well enough to build one port at a time) I
> > will move on to modify bsd.port.mk itself (and related files) to utilize
> > this mechanism for virtual installation of port dependencies during builds.
> >
> > The full project proposal can be seen at
> > https://docs.google.com/document/d/1B30U9csgY299W59tNraSX1LYjzsba2i04OrYAUpdIZs/edit
> > .
> >
> > My goal is that this work can be integrated well enough into
> > /usr/ports/Mk so that unlike Jail, no set up work should be required for
> > using ports tree to build a set of installable packages.
> >
> > Please let me know if you are interested in this project; feedback is
> > appreciated.? If someone would like to provide ongoing feedback or
> > mentorship that would be especially helpful.? Bakul Shah is my mentor
> > officially for GSoC but I would be happy to have additional support from
> > someone who is experienced with internals of the port infrastructure
> > makefiles.
G'luck,
Peter
--
Peter Pentchev roam@{ringlet.net,debian.org,FreeBSD.org} pp@storpool.com
PGP key: http://people.FreeBSD.org/~roam/roam.key.asc
Key fingerprint 2EE7 A7A5 17FC 124C F115 C354 651E EFB0 2527 DF13
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