USE_PYTHON=concurrent

[Roland Smith]

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=concurrent doesn't appear to actually
> change any behaviour.
> 
> Please could you explain this for me?

From “/usr/ports/Mk/Uses/python.mk”:

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=uniquefiles: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=  ${PYTHON_PKGNAMEPREFIX}
                      UNIQUE_SUFFIX=  -${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
“/usr/local/lib/pythonX.Y/site-packages/” could be labeled as concurrent as-is.

If your port wants to put things in DOCSDIR, EXAMPLESDIR, DATADIR, WWWDIR or
ETCDIR, you should add “USES=uniquefiles:dirs” to your port's Makefile.

Also read “/usr/ports/Mk/Uses/uniquefiles.mk”.


Roland
-- 
R.F.Smith                                   http://rsmith.home.xs4all.nl/
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