Include compile_data targets in rustc_env location expansion for rust_test

[tamasvajk]

Summary

Include compile_data targets in rustc_env location expansion for rust_test.

Problem

In rust_test, $(location) and $(rootpath) expansions in rustc_env only search data targets. When a compile_data target is referenced in rustc_env — for example to pass the path of a generated file via env!() and include_str!() — the expansion fails because compile_data targets are not in the search set.

This affects both rust_test code paths: the crate-wrapping path (testing an existing rust_library) and the standalone path (test with its own sources).

Fix

Add compile_data targets to the data_paths depset passed to expand_dict_value_locations in both rust_test code paths.

---

Note: This PR was largely AI-generated using Claude Code, with human review and guidance throughout.

[UebelAndre]

Thanks! Can you add a test for this somewhere in //test/unit?

[UebelAndre]

Looks like CI is failing

(15:23:36) ERROR: /workdir/test/unit/compile_data_env/BUILD.bazel:4:28: Compiling Rust bin crate_wrap_test (1 file) failed: (Exit 1): process_wrapper failed: error executing Rustc command (from rust_test rule target //test/unit/compile_data_env:crate_wrap_test)
  (cd /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/sandbox/linux-sandbox/737/execroot/_main && \
  exec env - \
    CARGO_CFG_TARGET_ARCH=x86_64 \
    CARGO_CFG_TARGET_OS=linux \
    CARGO_CRATE_NAME=mylib \
    CARGO_MANIFEST_DIR='${pwd}/test/unit/compile_data_env' \
    CARGO_PKG_AUTHORS='' \
    CARGO_PKG_DESCRIPTION='' \
    CARGO_PKG_HOMEPAGE='' \
    CARGO_PKG_NAME=mylib \
    CARGO_PKG_VERSION=0.0.0 \
    CARGO_PKG_VERSION_MAJOR=0 \
    CARGO_PKG_VERSION_MINOR=0 \
    CARGO_PKG_VERSION_PATCH=0 \
    CARGO_PKG_VERSION_PRE='' \
    GENERATED_PATH='${pwd}/bazel-out/k8-fastbuild/bin/test/unit/compile_data_env/generated.txt' \
    PATH=/bin:/usr/bin:/usr/local/bin \
    REPOSITORY_NAME='' \
    ZERO_AR_DATE=1 \
  bazel-out/k8-opt-exec/bin/util/process_wrapper/process_wrapper --subst 'pwd=${pwd}' --subst 'exec_root=${exec_root}' --subst 'output_base=${output_base}' -- bazel-out/k8-fastbuild/bin/external/+rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/rust_toolchain/bin/rustc test/unit/compile_data_env/lib.rs '--crate-name=mylib' '--crate-type=bin' '--error-format=human' '--codegen=metadata=-3204932321' '--codegen=extra-filename=-3204932321' '--out-dir=bazel-out/k8-fastbuild/bin/test/unit/compile_data_env' '--codegen=opt-level=0' '--codegen=debuginfo=0' '--codegen=strip=none' '--remap-path-prefix=${pwd}=.' '--remap-path-prefix=${exec_root}=.' '--remap-path-prefix=${output_base}=.' '--emit=link=bazel-out/k8-fastbuild/bin/test/unit/compile_data_env/crate_wrap_test' '--emit=dep-info' '--color=always' '--target=x86_64-unknown-linux-gnu' -L bazel-out/k8-fastbuild/bin/external/+rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/rust_toolchain/lib/rustlib/x86_64-unknown-linux-gnu/lib --test '--edition=2021' '-Cembed-bitcode=no' '--codegen=linker=/usr/bin/gcc' '--codegen=link-arg=-fuse-ld=gold' '--codegen=link-arg=-B/usr/bin' '--codegen=link-arg=-Wl,-no-as-needed' '--codegen=link-arg=-Wl,-z,relro,-z,now' '--codegen=link-arg=-pass-exit-codes' '--codegen=link-arg=-Wl,--push-state,-as-needed' '--codegen=link-arg=-lstdc++' '--codegen=link-arg=-Wl,--pop-state' '--codegen=link-arg=-Wl,--push-state,-as-needed' '--codegen=link-arg=-lm' '--codegen=link-arg=-Wl,--pop-state' '--sysroot=bazel-out/k8-fastbuild/bin/external/+rust+rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/rust_toolchain')
# Configuration: bbf8a40a9f44b6c42caef393bd2f86fe4f730742c9380170decb994f975e91a7
# Execution platform: @@platforms//host:host
Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
error: couldn't read `test/unit/compile_data_env/lib.rs`: No such file or directory (os error 2)
error: aborting due to 1 previous error

[UebelAndre]

Thank you!