cef/bazel/win/setup_sdk.bzl

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# Copyright (c) 2024 The Chromium Embedded Framework Authors. All rights
# reserved. Use of this source code is governed by a BSD-style license that
# can be found in the LICENSE file.
load("@bazel_tools//tools/cpp:windows_cc_configure.bzl", "find_vc_path", "setup_vc_env_vars")
def _get_arch(rctx):
if rctx.os.arch == "amd64":
return "x64"
def _is_windows(rctx):
return rctx.os.name.find("windows") != -1
# Tools in the form <Target>: [<Tool>, <Other files needed for that target>]
TOOLS = {
"mt": {
"tool": "mt.exe",
"deps": [],
},
"rc": {
"tool": "rc.exe",
"deps": ["rcdll.dll"],
},
}
def _setup_tools(rctx, sdk_bin_path, sdk_metadata_path):
contents = ""
rctx.symlink(sdk_metadata_path, "VerUnionMetadata")
contents += """
exports_files(["VerUnionMetadata"])
"""
for toolname, toolcfg in TOOLS.items():
toolexec = toolcfg["tool"]
deps = toolcfg["deps"]
direct_deps = [toolexec] + deps
shared_deps = toolcfg.get("shared_deps", [])
# Symlink any tools into the right places
for dep in direct_deps:
rctx.symlink(
"{}/{}".format(sdk_bin_path, dep),
dep,
)
# Setting up a filegroup for those dependents
contents += """
filegroup(
name = "{}_deps",
srcs = {},
)
""".format(toolname, direct_deps + shared_deps)
# Now create a wrapper for this tool that simply calls it
rctx.template(
"{}_wrapper.py".format(toolname),
Label("//bazel/win:wrapper.py.tpl"),
substitutions = {
"${binary}": toolexec,
},
executable = True,
)
# And add that newly created wrapper to the BUILD.bazel file
contents += """
py_binary(
name = "{0}_pybin",
srcs = ["{0}_wrapper.py"],
main = "{0}_wrapper.py",
data = [
"@rules_python//python/runfiles",
":{0}_deps"
],
python_version = "PY3",
)
""".format(toolname)
return contents
def _setup_vc_debug_runtime(rctx, sdk_bin_path):
ucrtbased_dll = "ucrtbased.dll"
rctx.symlink("{}/ucrt/{}".format(sdk_bin_path, ucrtbased_dll), ucrtbased_dll)
contents = """
filegroup(
name = "vc_debug_runtime",
srcs = ["{}"],
)
""".format(ucrtbased_dll)
return contents
def _windows_sdk_impl(rctx):
# We only support Windows
if not _is_windows(rctx):
fail("This rule only supports Windows")
# Figure out where the SDK is, which is based on a registry key.
vc_path = find_vc_path(rctx)
env = setup_vc_env_vars(rctx, vc_path, envvars = ["WINDOWSSDKVERBINPATH", "WindowsSdkDir", "WindowsSDKVersion"])
sdk_bin_path = "{}{}".format(env["WINDOWSSDKVERBINPATH"], _get_arch(rctx))
sdk_metadata_path = "{}UnionMetadata/{}".format(env["WindowsSdkDir"], env["WindowsSDKVersion"])
# Start with some pre-amble
contents = """# Autogenerated by //bazel/win:sdk.bzl
load("@rules_python//python:defs.bzl", "py_binary")
package(default_visibility = ["//visibility:public"])
"""
# Handle setting up tools from our list
contents += _setup_tools(rctx, sdk_bin_path, sdk_metadata_path)
contents += _setup_vc_debug_runtime(rctx, sdk_bin_path)
rctx.file("BUILD.bazel", contents)
setup_sdk = repository_rule(
attrs = {},
local = True,
configure = True,
implementation = _windows_sdk_impl,
)