Speed up builds with large number of git ignored files #499
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Poetry checks a lot of files against the list of excluded files. If there are many files ignored by git this can severly slow down builds. Currently, if a directory is ignored by git then all files within that directory get added to set of excluded files to check.
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Poetry calls
git ls-filesagainst the package directory to get the full list of files to exclude during build. This is very slow if you have e.g. hundreds of thousands of files that are ignored (don't ask why I have that).Calling
git ls-files --directoryinstead is a lot faster, as it doesn't return all files in directories that are ignored.Doing that, however, requires refactoring
find_excluded_filesto not simply return the set of all files that are to be ignored. Instead, we return a container object that correctly handles ignored directories.This does change the API of
Builder.find_excluded_filesto return aContainer[str]rather thanset[str], but I'm not sure if that is part of any public API.