zhan7236 opened a new pull request, #7061:
URL: https://github.com/apache/opendal/pull/7061
# Which issue does this PR close?
Part of #4842.
# Rationale for this change
Issue #4842 tracks adding user defined metadata support for various
services. This PR implements user metadata support for the `fs` service using
extended attributes (xattr) on Unix systems.
# What changes are included in this PR?
- Add `xattr` crate dependency for Unix platforms
- Enable `write_with_user_metadata` capability in the fs backend
- Implement `get_user_metadata()` and `set_user_metadata()` methods using
xattr
- Update `FsWriter` to store and write user metadata when closing files
- Update `fs_stat()` to read user metadata from xattr
User metadata is stored as extended attributes with the prefix
`user.opendal.` on the filesystem.
# Are there any user-facing changes?
Yes. Users can now use `op.write_with("path", data).user_metadata(metadata)`
to store custom metadata with files on the `fs` service (Unix only).
# AI Usage Statement
This PR was developed with assistance from GitHub Copilot using Claude Opus
4.5.
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