examples/MODULE.bazel

bazel_dep(name = "toolchains_protoc", version = "0.0.0")
bazel_dep(name = "aspect_bazel_lib", version = "2.8.1")
bazel_dep(name = "aspect_rules_py", version = "0.7.1")
bazel_dep(name = "rules_java", version = "7.6.5")
bazel_dep(name = "rules_proto", version = "6.0.0")
bazel_dep(name = "rules_python", version = "0.32.2")
bazel_dep(name = "rules_go", version = "0.48.0")
bazel_dep(name = "rules_uv", version = "0.10.0")

# This example is in the same repo with the ruleset, so we should point to the code at HEAD
# rather than use any release on the Bazel Central Registry.
local_path_override(
    module_name = "toolchains_protoc",
    path = "..",
)

####### PROTOBUF ##########
protoc = use_extension("@toolchains_protoc//protoc:extensions.bzl", "protoc")
protoc.toolchain(
    google_protobuf = "com_google_protobuf",
    # Demonstrate overriding the default version
    version = "v28.0",
)
use_repo(protoc, "com_google_protobuf", "toolchains_protoc_hub")

register_toolchains("@toolchains_protoc_hub//:all")

# NB: the `:all` here is critical, because `proto_lang_toolchain` expands into two targets:
# - proto_lang_toolchain rule [name]
# - toolchain rule [name]_toolchain
# and the second one is valid for registration.
# Attempting to register a proto_lang_toolchain rule as a toolchain gives a baffling error like
# Misconfigured toolchains: //tools:protoc_java_toolchain is declared as a toolchain but has inappropriate dependencies.
# Declared toolchains should be created with the 'toolchain' rule and should not have dependencies that themselves require toolchains.
register_toolchains("//tools/toolchains:all")

####### PYTHON ##########
# Shows how a typical Python user fetches all the dependencies of their app, including the protobuf runtime
dev_pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
dev_pip.parse(
    hub_name = "pypi",
    python_version = "3.11",
    requirements_lock = "//tools:requirements.txt",
)
use_repo(dev_pip, "pypi")

####### JAVA ##########
# Note: this is simpler than using rules_jvm_external with a maven installation,
# however it can cause version skew on the classpath if Coursier resolves a different version
# from the constraint solution.
# Users with a maven.install should instead do something like
# maven.install(
#     artifacts = [
#         "com.google.protobuf:protobuf-java:4.27.1",
#         "io.grpc:grpc-all:1.51.1",
#     ],
#     lock_file = "//:maven_install.json",
# )
http_jar = use_repo_rule("@bazel_tools//tools/build_defs/repo:http.bzl", "http_jar")

http_jar(
    name = "protobuf-java",
    sha256 = "0532ad1024d62361561acaedb974d7d16889e7670b36e23e9321dd6b9d334ef9",
    urls = ["https://repo1.maven.org/maven2/com/google/protobuf/protobuf-java/4.27.0-RC3/protobuf-java-4.27.0-RC3.jar"],
)