Date: Tue, 31 Mar 2015 22:00:21 +0200 From: Antoine Brodin <antoine@FreeBSD.org> To: David Naylor <dbn@freebsd.org> Cc: Roland Smith <rsmith@xs4all.nl>, freebsd-python@freebsd.org Subject: Re: USE_PYTHON=concurrent Message-ID: <CAALwa8nhDR%2BaJj6jeXMdcaCeh_Saf6wBqM%2BDt0AJ1SgZ7v8BCg@mail.gmail.com> In-Reply-To: <3956416.IomzSLxEPG@dragon.local> References: <3945228.UPHqZybedq@dragon.local> <20150331184738.GA95383@slackbox.erewhon.home> <3956416.IomzSLxEPG@dragon.local>
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On Tue, Mar 31, 2015 at 9:39 PM, David Naylor <dbn@freebsd.org> wrote:
> On Tuesday, 31 March 2015 20:47:38 Roland Smith wrote:
>> On Mon, Mar 30, 2015 at 09:14:40PM +0200, David Naylor wrote:
>> > Hi,
>> >
>> > I am investigating converting my ports to concurrent however I am not =
sure
>> > how concurrent is supposed to work:
>> >
>> > I looked in /usr/ports/Mk and only found a documentation reference to
>> > 'concurrent'. Setting USE_PYTHON=3Dconcurrent doesn't appear to actua=
lly
>> > change any behaviour.
>> >
>> > Please could you explain this for me?
>>
>> From =E2=80=9C/usr/ports/Mk/Uses/python.mk=E2=80=9D:
>>
>> concurrent - Indicates that the port can be installed for
>> different python versions at the same time. The port
>> is supposed to use a unique prefix for certain
>> directories using USES=3Duniquefiles:dirs (see the
>> uniquefiles.mk Uses for details about the
>> directories), if set to yes. Binaries receive an
>> additional suffix, based on ${PYTHON_VER}.
>>
>> The values for the uniquefiles USES are set as
>> follows:
>>
>> UNIQUE_PREFIX=3D ${PYTHON_PKGNAMEPREFIX}
>> UNIQUE_SUFFIX=3D -${PYTHON_VER}
>>
>> If the port is installed for the current default
>> python version, scripts and binaries in
>>
>> ${PREFIX}/bin
>> ${PREFIX}/sbin
>> ${PREFIX}/libexec
>>
>> are linked from the prefixed version to the
>> prefix-less original name, e.g.
>> bin/foo-2.7 --> bin/foo.
>>
>> So it seems that any port that only installs modules in
>> =E2=80=9C/usr/local/lib/pythonX.Y/site-packages/=E2=80=9D could be label=
ed as concurrent
>> as-is.
>>
>> If your port wants to put things in DOCSDIR, EXAMPLESDIR, DATADIR, WWWDI=
R or
>> ETCDIR, you should add =E2=80=9CUSES=3Duniquefiles:dirs=E2=80=9D to your=
port's Makefile.
>>
>> Also read =E2=80=9C/usr/ports/Mk/Uses/uniquefiles.mk=E2=80=9D.
>
> Thank you for your explanation, to confirm:
>
> So 'concurrent' shouldn't actually change any logic, but act as a flag fo=
r a
> build tool at actually build multiple versions of the port based on avail=
able
> and supported python versions? (However one might need to use uniquefile=
s to
> prevent file conflicts with the multiple packages from this port.)
Hi,
No, it isn't used as a flag for build tools.
USE_PYTHON=3Dconcurrent or USES=3Duniquefiles should be used to install
simultaneously a port for 2 versions of python, when those 2
installations would conflict otherwise (e.g. would install files with
the same name in ${PREFIX}/bin or same directory name for ${DOCSDIR}).
Ports that only install in ${PREFIX}/lib/pythonX.Y don't need anything.
Cheers,
Antoine
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