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fix(package-deps): follow serialized subsystem library references - #16128

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fix(package-deps): follow serialized subsystem library references#16128
Alizter wants to merge 13 commits into
ocaml:mainfrom
Alizter:push-qukwoznuqknz

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@Alizter

@Alizter Alizter commented Aug 23, 2026

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Description

Stacked on #16126 and the regressions in #16021 and #16023. Expose library references serialized by registered subsystems through Sub_system_info, then include inline-test runner, PPX-driver replacement, and PPX runtime edges in the library closure. Closure policy remains in the dependency layer rather than moving into install_rules.ml.

Related to #15511.

Alizter added 13 commits August 23, 2026 17:29
Record that a package root reached under a competing virtual implementation does not receive its own link closure.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Exercise library dependencies, private libraries, stubs, redirects, namespaces, virtual implementations, PPX runtime libraries, nested Dune consumers, installed packages, and only-packages masking. Record the current missing-library failures before materializing the closure.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Record that a scoped package layout retains melange_requires metadata without materializing its referenced workspace library.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Make workspace packages declared with (deps (package ...)) expose the ordinary OCaml library closure required by their installed libraries. Materialize only selected library artifacts and generated metadata, including direct redirects, PPX runtime dependencies, and virtual default implementations.

Do not follow package metadata: external packages have no reliable package dependency graph, while OCaml library metadata provides the closure consumers resolve.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Record that a scoped package dependency omits the intermediate metadata in a deprecated-library redirect chain.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Compute each workspace root library closure in Melange mode as well as OCaml mode so scoped package layouts satisfy serialized melange_requires edges.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Record that a support redirect owned by another package omits metadata generated for its deprecated package name.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Materialize each intermediate deprecated-library redirect needed to reach a selected workspace library without exposing unrelated libraries from the redirects' owning packages.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Generate the META and dune-package files owned by deprecated package names when their redirects are selected by a scoped workspace library closure.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Record that a scoped package dependency omits the library referenced by a serialized PPX driver replacement edge.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Record that scoped package metadata can reference an inline-test runner library outside the traversed OCaml requires closure.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Move scoped library-closure resolution behind the install-layout resolver so metadata-specific closure edges can be added without introducing dependencies from dependency evaluation back to rule-generation modules.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
Include libraries named by inline-test runner and PPX-driver replacement metadata in scoped workspace library layouts.

Signed-off-by: Ali Caglayan <alizter@gmail.com>
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