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98 lines
3.3 KiB
98 lines
3.3 KiB
# Copyright 2021 The Pigweed Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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import("python_action.gni")
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import("target_types.gni")
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# Creates a pw_source_set that pulls in a static library hosted in CIPD.
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#
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# Let's say you have a package with a static library:
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# CIPD package path: `pigweed/third_party/libsomething`
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# Files:
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# ./libsomething/include/something.h
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# ./libsomething/libsomething.a
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# Installed by your manifest at //tools/my_packages.json.
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#
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# Your usage might look like this:
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#
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# import("$dir_pw_build/copy_from_cipd.gni")
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#
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# # This target links in the .a file.
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# pw_cipd_static_library("libsomething") {
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# manifest = "//tools/my_packages.json"
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# library_path = "libsomething/libsomething.a"
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# cipd_package = "pigweed/third_party/libsomething"
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# }
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#
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# # This target needs libsomething.a to be linked in.
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# pw_source_set("math_stuff") {
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# sources = [ "optimized_math.cc" ]
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# ...
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# deps = [ ":libsomething" ]
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# }
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#
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# Args:
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# manifest: (required) GN-style path to the JSON manifest file that the
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# package of interest is defined in.
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# library_path: (required) The path of the static library of interest,
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# relative to the root where the manifest's CIPD packages were installed to.
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# e.g. if the package is installed by pigweed.json, and the .a file is at
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# //.environment/cipd/pigweed/libs/libsomething.a, this argument should be
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# "libs/libsomething.a".
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# cipd_package: (required) The name of the CIPD package. This is the "path" of
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# the package in the manifest file.
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#
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template("pw_cipd_static_library") {
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_out_dir = "${target_out_dir}/cipd/$target_name"
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_out_relative = rebase_path(_out_dir, root_build_dir)
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_out_file = "$_out_dir/${invoker.library_path}"
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_manifest_path = rebase_path(invoker.manifest, root_build_dir)
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pw_python_action("$target_name.check_copy") {
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module = "pw_build.copy_from_cipd"
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args = [
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"--package-name=${invoker.cipd_package}",
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"--manifest=${_manifest_path}",
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"--file=${invoker.library_path}",
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"--out-dir=${_out_relative}",
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]
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# Parallel calls might both be invoking CIPD on the same directory which
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# might work but is redundant, so serialize calls.
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pool = "$dir_pw_build:copy_from_cipd_pool"
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# TODO(pwbug/335): This should somehow track the actual .a for changes as
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# well.
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inputs = [ invoker.manifest ]
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outputs = [ _out_file ]
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}
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pw_source_set(target_name) {
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forward_variables_from(invoker,
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"*",
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[
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"manifest",
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"library_path",
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"cipd_package",
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])
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if (!defined(libs)) {
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libs = []
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}
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if (!defined(deps)) {
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deps = []
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}
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libs += [ _out_file ]
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deps += [ ":$target_name.check_copy" ]
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}
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}
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