src/google/protobuf/compiler/test_plugin_injection.bzl

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load("//build_defs:cpp_opts.bzl", "COPTS")

# This works around https://github.com/bazelbuild/bazel/issues/19124 by using a generated header to
# inject the Bazel path of the test plugins.  The simpler alternative is broken in Bazel 6.3.0,
# which is to just inject these via copts.
def inject_plugin_paths(name):
    hdr = name + ".h"
    native.genrule(
        name = "test_plugin_paths_gen",
        outs = [hdr],
        srcs = [
            ":fake_plugin",
            ":test_plugin",
        ],
        cmd = """
cat <<'EOF' >$(OUTS)
#ifndef GOOGLE_PROTOBUF_COMPILER_TEST_PLUGIN_PATHS_H__
#define GOOGLE_PROTOBUF_COMPILER_TEST_PLUGIN_PATHS_H__

#define GOOGLE_PROTOBUF_TEST_PLUGIN_PATH "$(rootpath :test_plugin)"
#define GOOGLE_PROTOBUF_FAKE_PLUGIN_PATH "$(rootpath :fake_plugin)"

#endif  // GOOGLE_PROTOBUF_COMPILER_TEST_PLUGIN_PATHS_H__
""",
        visibility = ["//visibility:private"],
        testonly = True,
    )

    native.cc_library(
        name = name,
        hdrs = [hdr],
        strip_include_prefix = "/src",
        copts = COPTS,
        testonly = True,
    )