BUILD.bazel

load("@aspect_rules_js//js:defs.bzl", "js_library")
load("@aspect_rules_js//npm:defs.bzl", "npm_link_package")
load("@bazel_skylib//lib:selects.bzl", "selects")
load("@bazel_skylib//rules:common_settings.bzl", "bool_flag", "string_flag")
load("@npm//:capnp-es/package_json.bzl", capnp_es_bins = "bin")
load("@npm//:defs.bzl", "npm_link_all_packages")
load("//:build/wd_cc_embed.bzl", "wd_cc_embed")

# This is used to embed the ICU data file which libicu needs at runtime to do its thing.
# We bake this file into the binary to avoid shipping it separately. (V8's normal GN build can
# actually do this for us, but we use the Bazel build which doesn't have this option.) Using #embed
# makes this very fast and convenient.
wd_cc_embed(
    name = "icudata-embed",
    src = "@com_googlesource_chromium_icu//:common/icudtl.dat",
    base_name = "icu-data-file",
    strip_include_prefix = "",
    visibility = ["//visibility:public"],
)

# Also re-export the v8 ICU library for @workerd-v8
alias(
    name = "v8_icu",
    actual = "@v8//:v8_icu",
    tags = ["manual"],
    visibility = ["//visibility:public"],
)

npm_link_all_packages(name = "node_modules")

# Rust formatting and lint configuration for every crate in the repository, wherever it lives.
exports_files([
    "clippy.toml",
    "rustfmt.toml",
])

npm_link_package(
    name = "node_modules/@workerd/jsg",
    src = "//src/workerd/jsg:jsg_js",
    package = "@workerd/jsg",
)

genrule(
    name = "merged_clang_tidy_config",
    srcs = [
        ":.clang-tidy",
        "@capnp-cpp//:.clang-tidy",
    ],
    outs = ["merged.clang-tidy"],
    cmd = "$(location //build/tools/clang_tidy:merge_clang_tidy_configs) $@ $(location :.clang-tidy) $(location @capnp-cpp//:.clang-tidy)",
    tools = ["//build/tools/clang_tidy:merge_clang_tidy_configs"],
    visibility = ["//visibility:public"],
)

# Plugin to generate .js files
capnp_es_bins.capnpc_js_binary(
    name = "capnpc_js_plugin",
    visibility = ["//visibility:public"],
)

# Plugin to generate .ts files
capnp_es_bins.capnpc_ts_binary(
    name = "capnpc_ts_plugin",
    visibility = ["//visibility:public"],
)

js_library(
    name = "prettierrc",
    srcs = [":.prettierrc.json"],
    visibility = ["//build/deps/formatters:__pkg__"],
)

# Platform definition for using clang-cl on Windows
platform(
    name = "x64_windows-clang-cl",
    constraint_values = [
        "@platforms//cpu:x86_64",
        "@platforms//os:windows",
        "@bazel_tools//tools/cpp:clang-cl",
    ],
)

# Used for cross-compilation
platform(
    name = "macOS_x86",
    constraint_values = [
        "@platforms//os:macos",
        "@platforms//cpu:x86_64",
    ],
)

# Detect whether we use Linux/macOS/either, used to configure whether tcmalloc/perfetto should be
# used.
config_setting(
    name = "is_linux",
    constraint_values = ["@platforms//os:linux"],
    visibility = ["//visibility:public"],
)

config_setting(
    name = "is_macos",
    constraint_values = ["@platforms//os:macos"],
    visibility = ["//visibility:public"],
)

selects.config_setting_group(
    name = "is_unix",
    match_any = [
        ":is_linux",
        ":is_macos",
    ],
    visibility = ["//visibility:public"],
)

# bazel enables the --ffunction-sections, --gc-sections flags used to remove dead code by default
# on Linux opt builds. Enable the equivalent macOS flag -Wl,-dead_strip here to work around bazel
# idiosyncrasies.
# Note that the flag is defined for all non-debug builds of kj_test() and wd_cc_binary() on mac as
# it surprisingly appears to be faster, perhaps because the linker generates and writes binaries
# with much fewer symbols. This also helps reduce local and CI disk usage. If needed, dead code
# stripping can be limited to optimized builds.
config_setting(
    name = "fast_build",
    values = {"compilation_mode": "fastbuild"},
)

config_setting(
    name = "opt_build",
    values = {"compilation_mode": "opt"},
)

bool_flag(
    name = "dead_strip",
    build_setting_default = True,
)

config_setting(
    name = "set_dead_strip",
    flag_values = {"dead_strip": "True"},
)

# Workaround for bazel not supporting negated conditions (https://github.com/bazelbuild/bazel-skylib/issues/272)
selects.config_setting_group(
    name = "not_dbg_build",
    match_any = [
        ":fast_build",
        ":opt_build",
    ],
)

selects.config_setting_group(
    name = "use_dead_strip",
    match_all = [
        "@platforms//os:macos",
        ":set_dead_strip",
        ":not_dbg_build",
    ],
)

# Clang-tidy config to use
label_flag(
    name = "clang_tidy_config",
    build_setting_default = ":merged_clang_tidy_config",
    visibility = ["//visibility:public"],
)