See the previous commit for why. Marked as API change since osutil.listdir()
seems widely used in third-party extensions.
The win32mbcs extension is updated to wrap both util. and windows. aliases.
The function is only called once except for "hg debugconfig", where it is
called twice. So there is no need to cache it.
Caching it will cause issues with chgserver. Instead of dropping the cache
in chgserver, it seems cleaner to just avoid the cache.
Handling config and environ priorities has been messy. Partially because we
don't have config layers - you either get all configs (sys + user), or none.
Ideally, environ like $EDITOR, $PAGER should be able to override the system
configs "ui.editor", "pager.pager". This patch provides the ability to
convert them into config items, so they can be inserted into the middle
config layer between system rc and user rc.
The next patches will convert environ to raw config items, and insert the
config items between systemrcpath and userrcpath. This patch teaches
rccomponents to return the type information so the caller could distinguish
between "path" and raw config "items".
After this change, there are 3 rcpath functions:
- defaultrcpath
- systemrcpath
- userrcpath
This will allow us to insert another config layer in the middle.
As discussed at [1], the logic around "actual config"s seem to be
non-trivial enough that it's worth a new module.
This patch creates the module and move "scmutil.*rcpath" functions there as
the first step. More methods will be moved to the module in the future.
The module is different from config.py because the latter only cares about
data structure and parsing, and does not care about special case, or system
config paths, or environment variables.
[1]: https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-March/095503.html
