On 04/03/15 17:24, René J.V. Bertin wrote:
On Wednesday March 04 2015 16:52:50 Chris Jones wrote:
If upstream cannot/wont fix, then if we want to keep the port in
MacPorts, it should be worked around. trace mode (or anything that does
the same thing, hides the installed version) strikes me as perfect here.
Agreed - and that's exactly an example of a case where some form of requiring
trace mode in the portfile would be useful.
I think we are just niggling over the details here. I am not sure I see
the need for ports to be able to opt in or out of tracemode (out should
be just not possible, but I could be persuaded on opting in). For me,
trace mode is much more than a 'debugging' tool, but a means of
sanitising the build environment to limit the build from only having
access to what we want.
As to fixing ... the experience many of use have had with /usr/local can
probably serve as an example/metaphor for why it's not always feasible to avoid
including the wrong version of a header... (and I guess it should be easier to
exclude or demote a directory from outside the prefix than to exclude/demote
${prefix}/include ...)
I don't see whay you say its not feasible. tracemode would absolutely
prevent access to /usr/local during building, which is a very good
thing. It would also only allow access to the files the ports the port
in question being built has declared a dependency on. As MP knows
exactly which files a given port has installed, this can be done on a
file by file level. This should pretty well cover any use case of a port
building against things it shouldn't, regardless of if those files are
under /usr/local (just a blanket ban) or more fine grained control under
${prefix}.
Chris
I wasn't completely PC about the exchange I had on the Qt ML: apparently
attempts had been made to correct the particular issue I reported, which turned
out to be too tricky.
R.
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