unable to find native static library in 0.55.6 due to change in crate.annotation rustc inputs.

[aran]

In our project we use diesel, which depends on pq-sys. We customize pq-sys to use a libpq built by bazel:

crate.annotation(
    build_script_env = {
        "PQ_LIB_STATIC": "1",
    },
    crate = "pq-sys",
    data = ["@@libpq~~_repo_rules~postgres//:libpq"],
    rustc_flags = [
        "-L",
        "$(BINDIR)/external/libpq~~_repo_rules~postgres",
    ],
)

This works in 0.54.1.

In 0.55.6, I am seeing new build failures:

% bazel build @@rules_rust~~crate~plans_crates__pq-sys-0.6.1//:pq_sys
INFO: Invocation ID: 46e78509-9ff9-4936-a802-5e9e60d1d605
INFO: Analyzed target @@rules_rust~~crate~plans_crates__pq-sys-0.6.1//:pq_sys (32 packages loaded, 313 targets configured).
ERROR: /private/var/tmp/_bazel_aran/3653d9df741c74285dab1d13f08e5df3/external/rules_rust~~crate~plans_crates__pq-sys-0.6.1/BUILD.bazel:18:13: Compiling Rust rlib pq_sys v0.6.1 (5 files) failed: (Exit 1): process_wrapper failed: error executing Rustc command (from target @@rules_rust~~crate~plans_crates__pq-sys-0.6.1//:pq_sys) bazel-out/darwin_arm64-opt-exec-ST-d57f47055a04/bin/external/rules_rust~/util/process_wrapper/process_wrapper --env-file ... (remaining 33 arguments skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
error: could not find native static library `pq`, perhaps an -L flag is missing?

error: aborting due to 1 previous error

Target @@rules_rust~~crate~plans_crates__pq-sys-0.6.1//:pq_sys failed to build

aquery shows that a -L flag is still being provided (-L \ bazel-out/darwin_arm64-fastbuild/bin/external/libpq~~_repo_rules~postgres), and the directory it is pointing to does contain a libpq.a.

However, in the aquery output, for 0.54.1, I see bazel-out/darwin_arm64-fastbuild/bin/external/libpq~~_repo_rules~postgres/libpq.a, as one of the Rustc Inputs. It is no longer present in the Inputs list in 0.55.6.

I tried adding the libpq target to the crate.annotation deps field, but it doesn't work.

[UebelAndre]

Maybe this is related to #3005 ? Try setting your annotation to compile_data?

[aran]

Thanks, missed that one in the release notes.