[issue9309] Add environment variable complementing command line option -no-user-cfg

[Alexander Dreyer]

Alexander Dreyer <adreyer at gmx.de> added the comment:

The idea is, that an environment variable can be set globally by the master-build system or the packaging system. In contrary, the --no-user-cfg switch has to be added to the build description of each individial package. For strongly community-driven projects - like Sage - it is very likely, that this will be forgotten by some package maintainers. Since usually .pydistutils.cfg is not used in automated test environments this error will be detected, when a package is accepted.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue9309>
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