cef/bazel/win/mt.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/win:cc_env.bzl", "collect_compilation_env", "use_cpp_toolchain")
# Copy exe and pdb file without tracking the destination as an output.
# Based on https://github.com/bazelbuild/bazel-skylib/blob/main/rules/private/copy_file_private.bzl
def _write_copy_cmd(ctx, src, dst):
# Most Windows binaries built with MSVC use a certain argument quoting
# scheme. Bazel uses that scheme too to quote arguments. However,
# cmd.exe uses different semantics, so Bazel's quoting is wrong here.
# To fix that we write the command to a .bat file so no command line
# quoting or escaping is required.
bat = ctx.actions.declare_file(ctx.label.name + "-cmd.bat")
src_path = src.path.replace("/", "\\")
dst_path = dst.path.replace("/", "\\")
ctx.actions.write(
output = bat,
# Do not use lib/shell.bzl's shell.quote() method, because that uses
# Bash quoting syntax, which is different from cmd.exe's syntax.
content = "@copy /Y \"%s\" \"%s\" >NUL\n@copy /Y \"%s\" \"%s\" >NUL" % (
src_path,
dst_path,
src_path.replace(".exe", ".pdb"),
dst_path.replace(".exe", ".pdb"),
),
is_executable = True,
)
return bat
def _add_mt_impl(ctx):
mt_files = ctx.files.mt_files
input = ctx.attr.in_binary[DebugPackageInfo].unstripped_file
output = ctx.outputs.out_binary
bat = _write_copy_cmd(ctx, input, output)
inputs = mt_files + [input, bat]
# Bring over 'data' dependencies from the input.
deps_inputs = ctx.runfiles(files = inputs)
deps_inputs = deps_inputs.merge_all([ctx.attr.in_binary[DefaultInfo].default_runfiles])
ctx.actions.run(
executable = ctx.executable._tool,
inputs = deps_inputs.files,
outputs = [output],
env = collect_compilation_env(ctx),
# The bat file will be executed before the tool command.
arguments = [bat.path, "-nologo", "-manifest"] + [f.path for f in mt_files] +
["-outputresource:{}".format(output.path)],
mnemonic = "AddMT"
)
return DefaultInfo(files = depset([output]))
add_manifest = rule(
implementation = _add_mt_impl,
attrs = {
"mt_files": attr.label_list(allow_files = [".manifest"]),
"in_binary": attr.label(providers = [CcInfo], allow_single_file = True),
"out_binary": attr.output(),
"_cc_toolchain": attr.label(default = Label("@bazel_tools//tools/cpp:current_cc_toolchain")),
"_tool": attr.label(
default = "@winsdk//:mt_pybin",
executable = True,
cfg = "exec"
)
},
fragments = ["cpp"],
toolchains = use_cpp_toolchain(),
)