[asaah262]

Note

Requires merging opencloud-eu/reva#923 before merging this PR

Description

Remove the obsolete xattrs metadata backend selection from OpenCloud's decomposedfs CLI.

• Remove the reference to metadata.NewXattrsBackend(), which is being removed from Reva.
• Keep the existing MessagePack backend selection unchanged.
• Preserve the existing NullBackend fallback for unsupported metadata backends.
• Add unit tests covering MessagePack and xattrs backend selection.

Related Issue

• Related to deprecate and remove xattrs metadata backend #3048

Motivation and Context

The modern XattrsBackend implementation is being removed from Reva as part of issue #3048.

OpenCloud's decomposedfs CLI still references NewXattrsBackend(), which causes a compilation error when building OpenCloud against the updated Reva.

Since OpenCloud does not expose the obsolete xattrs metadata backend as a configurable option, this change removes the unused reference while preserving the existing MessagePack functionality.

How Has This Been Tested?

• Test environment: macOS, using OpenCloud with both its vendored Reva dependency and a modified local Reva worktree through go.work.
• Test case 1: Verify that backend("mpk") returns MessagePackBackend.
• Test case 2: Verify that backend("xattrs") returns NullBackend.

Validation commands:

GOWORK=off go test -mod=vendor ./opencloud/pkg/command -run '^TestBackend$' -count=1 -v
go test ./opencloud/pkg/command -count=1
go build ./...

All checks passed.

Screenshots (if appropriate)

Not applicable.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation added

[codacy-production]

Up to standards ✅

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