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127 lines
3.7 KiB
Plaintext
127 lines
3.7 KiB
Plaintext
# Copyright 2014 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# Runs the version processing script over the given template file to produce
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# an output file. This is used for generating various forms of files that
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# incorporate the product name and version.
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#
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# Unlike GYP, this will actually compile the resulting file, so you don't need
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# to add it separately to the sources, just depend on the target.
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#
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# In GYP this is a rule that runs once per ".ver" file. In GN this just
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# processes one file per invocation of the template so you may have to have
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# multiple targets.
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#
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# Parameters:
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# sources (optional):
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# List of file names to read. When converting a GYP target, this should
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# list the 'source' (see above) as well as any extra_variable_files.
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# The files will be passed to version.py in the order specified here.
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#
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# output:
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# File name of file to write. In GYP this is unspecified and it will
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# make up a file name for you based on the input name, and tack on
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# "_version.rc" to the end. But in GN you need to specify the full name.
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#
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# template_file (optional):
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# Template file to use (not a list). Most Windows users that want to use
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# this to process a .rc template should use process_version_rc_template(),
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# defined in //chrome/process_version_rc_template.gni, instead.
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#
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# extra_args (optional):
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# Extra arguments to pass to version.py. Any "-f <filename>" args should
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# use sources instead.
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#
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# process_only (optional, defaults to false)
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# Set to generate only one action that processes the version file and
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# doesn't attempt to link the result into a source set. This is for if
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# you are processing the version as data only.
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#
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# visibility (optional)
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#
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# Example:
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# process_version("myversion") {
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# sources = [
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# "//chrome/VERSION"
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# "myfile.h.in"
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# ]
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# output = "$target_gen_dir/myfile.h"
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# extra_args = [ "-e", "FOO=42" ]
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# }
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template("process_version") {
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assert(defined(invoker.output), "Output must be defined for $target_name")
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process_only = defined(invoker.process_only) && invoker.process_only
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if (process_only) {
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action_name = target_name
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} else {
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action_name = target_name + "_action"
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source_set_name = target_name
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}
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action(action_name) {
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script = "//build/util/version.py"
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inputs = []
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if (defined(invoker.inputs)) {
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inputs += invoker.inputs
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}
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if (defined(invoker.template_file)) {
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inputs += [ invoker.template_file ]
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}
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outputs = [
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invoker.output,
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]
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args = []
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if (is_official_build) {
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args += [ "--official" ]
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}
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if (defined(invoker.sources)) {
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inputs += invoker.sources
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foreach(i, invoker.sources) {
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args += [
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"-f",
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rebase_path(i, root_build_dir),
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]
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}
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}
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if (defined(invoker.extra_args)) {
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args += invoker.extra_args
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}
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args += [
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"-o",
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rebase_path(invoker.output, root_build_dir),
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]
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if (defined(invoker.template_file)) {
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args += [ rebase_path(invoker.template_file, root_build_dir) ]
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}
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forward_variables_from(invoker, [ "deps" ])
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if (process_only) {
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# When processing only, visibility gets applied to this target.
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forward_variables_from(invoker, [ "visibility" ])
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} else {
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# When linking the result, only the source set can depend on the action.
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visibility = [ ":$source_set_name" ]
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}
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}
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if (!process_only) {
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source_set(source_set_name) {
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forward_variables_from(invoker, [ "visibility" ])
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sources = get_target_outputs(":$action_name")
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public_deps = [
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":$action_name",
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]
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}
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}
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}
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