Bazel support

[mingxwa]

Ported from: microsoft/proxy#379

@defaultactor opened on Dec 7, 2025:

Any chance of Bazel support/module on https://registry.bazel.build/ ? Saw microsoft/proxy#375 and figured more the merrier

[MoFHeka]

A simple implementation
//third_party/proxy/BUILD.bazel

# Description:
#   Proxy: Next Generation Polymorphism in C++.

load("@rules_cc//cc:defs.bzl", "cc_library")

licenses(["notice"])  # Apache 2

exports_files(["LICENSE"])

SUPPORTED_CPP_STANDARDS = [
    "20",
    "23",
    "2b",
    "26",
]

[config_setting(
    name = "is_cpp" + v,
    values = {"cxxopt": "-std=c++" + v},
) for v in SUPPORTED_CPP_STANDARDS]

cc_library(
    name = "proxy",
    hdrs = glob(["include/**/*.h"]),
    strip_include_prefix = "include",
    target_compatible_with = select(
        {":is_cpp" + v: [] for v in SUPPORTED_CPP_STANDARDS} |
        {"//conditions:default": ["@platforms//:incompatible"]},
    ),
    visibility = ["//visibility:public"],
)

//third_party/proxy/extensions.bzl

"""Proxy: Next Generation Polymorphism in C++."""

load("//third_party/proxy:repositories.bzl", "proxy_repo")

def _proxy_dep_impl(_ctx):
    proxy_repo()

proxy_dep = module_extension(
    implementation = _proxy_dep_impl,
)

//third_party/proxy/extensions.bzl

"""Proxy: Next Generation Polymorphism in C++."""

load("@bazel_tools//tools/build_defs/repo:git.bzl", "new_git_repository")

def proxy_repo():
    new_git_repository(
        name = "proxy",
        remote = "https://github.com/ngcpp/proxy.git",
        commit = "bcbe0c792cd42cb48edfbbdb1e272255cbe73cae",
        build_file = "//third_party/proxy:BUILD.bazel",
    )

MODULE.bazel

# setting proxy for next generation polymorphism in C++
proxy_deps = use_extension("//third_party/proxy:extensions.bzl", "proxy_dep")
use_repo(proxy_deps, "proxy")