sourcachefs is a persistent, read-only, FUSE-based caching file system. The goal of sourcachefs is to provide a caching layer over immutable slow file systems, possibly networked ones such as SSHFS.

sourcachefs was initially designed to cache source files exposed via a slow networked file system, where this file system maintains immutable views of each commit from a version control system. In this scheme, each commit is a separate directory and can be cached indefinitely because the contents are assumed to not change.

sourcachefs should support offline operation: once the contents of the remote file system have been cached, operations on those same files and directories should continue to work locally.

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