Fix platform specific gems removed from the lockfile #6266
Merged
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What was the end-user or developer problem that led to this PR?
If we have a lockfile missing a specific gem for the current platform, and that gem happens to be already installed locally, then Bundler will initially try to use "local mode" and use the existing lockfile exclusively. But then when materializing it will realize that it's missing platform gems and try to re-resolve to fill them in. However, since we initially used "local mode", this resolution will only consider local gems and will result in gems for other platforms being lost.
What is your fix for the problem, implemented in this PR?
To fix this, we need to save the resolution mode in the definition early and make sure we set up sources using that mode before re-resolving.
Fixes #6263.
Make sure the following tasks are checked