Update ModuleWriter logic to use ArchiveSource enum

[e-nomem]

This PR updates the ModuleWriter trait to use the ArchiveSource enum that was added to support the BindingGenerator trait.

This is part 1 of 2 PRs, where the second one will add a VirtualWriter struct that will wrap around WheelWriter and SDistWriter. The virtual writer will store a HashMap<PathBuf, ArchiveSource> internally so, with this update, the virtual writer can eventually just call self.inner.add_entry(target, source).

The primary purpose of this virtual writer is to ensure that the files are sorted by path before being written to the underlying archive and ensure that builds are reproducible. As a useful side effect, this will move the file exclusion and duplicate tracking to the virtual writer as well, providing a nice separation of concerns with the virtual writer deciding if a file should be present in the archive and the underlying writer actually doing the writing to the archive.

The intended end result for this set of patches can be viewed on my virtual-writer branch.

[e-nomem]

It feels odd to have a path on a generated source but, without it, the tests for rewriting path dependencies during sdist creation fail because we try to add the Cargo.toml again after rewriting it.

[Copilot]

Pull request overview

This PR refactors the ModuleWriter trait to use the ArchiveSource enum for a cleaner API design. This is part 1 of 2 PRs that will enable a future VirtualWriter implementation for reproducible builds by sorting files before writing them to archives.

Key changes:

• Splits ModuleWriter into ModuleWriterInternal (with add_entry) and ModuleWriter (with convenience methods)
• Updates GeneratedSourceData to include an optional path field for source tracking
• Refactors all writer implementations (Wheel, SDist, Path) to handle ArchiveSource enum directly instead of Read trait

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/module_writer/mod.rs	Refactored trait structure with sealed pattern; added blanket impl for convenience methods
src/module_writer/wheel_writer.rs	Updated to implement ModuleWriterInternal with add_entry method handling ArchiveSource
src/module_writer/sdist_writer.rs	Updated to implement ModuleWriterInternal with add_entry method handling ArchiveSource
src/module_writer/path_writer.rs	Updated to implement ModuleWriterInternal; improved error messages with Debug formatting
src/module_writer/mock_writer.rs	New test mock writer implementing the refactored trait
src/archive_source.rs	Added path field to GeneratedSourceData and path() helper method
src/binding_generator/mod.rs	Simplified to use add_entry directly instead of matching on ArchiveSource
src/binding_generator/{uniffi,pyo3,cffi,bin}_binding.rs	Updated GeneratedSourceData construction to include path: None field
src/source_distribution.rs	Updated imports to use ModuleWriter trait directly
src/build_context.rs	Updated imports to use ModuleWriter instead of ModuleWriterExt
tests/common/mod.rs	Removed unused metadata module reference