Handle module source subdirectories in Terraform #16160
Merged
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In order to remain backward compatible with some modules, we need to
handle subdirs during Load. This means duplicating part of the go-getter
code path for subDir handling so we can resolve any subDirs and globs
internally, while keeping the entire remote directory structure within
the file storage.
Module detection currently requires calling the registry to determine
the subdirectory. Since we're not directly accessing the subdirectory
through FolderStorage, and now handling it within terraform so modules can
reference sibling paths, we need to call out to the registry every
time we load a configuration to verify the subdirecory for the module,
which is returned during the Detect.
This adds a record for the detected subdirectory in the top-level of the FolderStorage path for
retrieval during Tree.Load. This lets us bypass Detection altogether,
modules can be loaded without redetecting.
Fixes #16138