[MacPorts] #65109: py-build, py-bootstrap-modules: breaks use of trace-mode

[MacPorts]

#65109: py-build,py-bootstrap-modules: breaks use of trace-mode
-------------------------+-------------------------------------------
 Reporter:  reneeotten   |      Owner:  jmroot
     Type:  enhancement  |     Status:  assigned
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.7.2
 Keywords:               |       Port:  py-build py-bootstrap-modules
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 For Python ports that use `python.pep517 yes` one cannot use trace-mode at
 this moment. Builds will all fail when either `colorama` or `importlib-
 metadata` are installed.


 1. {{{AttributeError: module 'colorama' has no attribute 'init'}}}
 The `colorama` package is only required on Windows, but do to the way it
 checks for the presence of the package it causes a failure in trace-mode.
 This is easily fixed by just patching out the use of `colorama` in
 `build-0.7.0/src/build/__main__.py`.

 2. {{{AttributeError: module 'importlib_metadata' has no attribute
 'MetadataPathFinder'}}}
 This is likely due to how `setuptools` checks whether the
 `importlib_metadata` package is available... an "easy" but not really
 correct way would be to just add the `pyXY-importlib-metadata` as a build
 dependency or investigate further on how this can be avoided in `py-
 build`.

 I am happy to try and fix building using `pep517` in trace-mode, but first
 wanted to get some opinions before spending time on it.

-- 
Ticket URL: <https://trac.macports.org/ticket/65109>
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