document why package dependencies not auto-satisfied on test-from-prefixdir and test-with-fake-pkg steps

[midnightmagic]

See the error message:

"Traceback (most recent call last):
  File "/home/tahoe/buildslave/tahoe/netbsd5-i386/build/src/../misc/build_helpers/run_trial.py", line 14, in <module>
    __import__(modulename)
  File "/home/tahoe/buildslave/tahoe/netbsd5-i386/build/src/allmydata/__init__.py", line 27, in <module>
    import nevow
ImportError: No module named nevow"

Here: ​http://tahoe-lafs.org/buildbot/builders/MM%20netbsd5%20i386%20warp/builds/108/steps/test-with-fake-pkg/logs/stdio

When Nevow is manually installed, this error happens: ​http://tahoe-lafs.org/buildbot/builders/MM%20netbsd5%20i386%20warp/builds/106/steps/test-from-prefixdir/logs/stdio

[warner]

fixed formatting

[zooko]

The "build" and "test" steps automatically resolve dependencies. The test-from-prefixdir and run-test-with-fake-pkg steps do not.

This is kind of a problem, but it is also potentially useful information to see how a build system without automatic dependency resolution (such as, potentially, Brian's unsuck branch?) would fare on our current buildslaves.

[davidsarah]

This also applies to the test-from-egg step.

[davidsarah]

Oh, I'm mistaken. test-from-egg does auto-resolve dependencies (compare ​this test-from-egg and ​this test-from-prefixdir).

[zooko]

I don't think this is a bug. The test-from-prefixdir step is supposed to test what happens when there isn't automatic resolution of dependencies. How about if we change this ticket to "test-from-prefixdir is badly named and ill-documented so people don't realize that it is supposed to be testing the traditional no-automatic-dependencies install"? :-)

[zooko]

I'm assigning this to myself to organize and document the test-from-prefixdir step so that people like Brian understand what it is supposed to do.

[daira]

Maybe this ticket is invalid, if python setup.py install is actually supposed to install dependencies (#1494 and #2063).

[exarkun]

There is no longer a Nevow dependency, Tahoe no long uses Buildbot, eggs are largely a thing of the past.

I'm going to call this wontfix at this point.