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-rw-r--r--tools/gn/functions_target.cc221
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diff --git a/tools/gn/functions_target.cc b/tools/gn/functions_target.cc
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--- a/tools/gn/functions_target.cc
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-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "tools/gn/functions.h"
-
-#include "tools/gn/err.h"
-#include "tools/gn/parse_tree.h"
-#include "tools/gn/scope.h"
-#include "tools/gn/target_generator.h"
-#include "tools/gn/value.h"
-
-namespace {
-
-Value ExecuteGenericTarget(const char* target_type,
- Scope* scope,
- const FunctionCallNode* function,
- const std::vector<Value>& args,
- BlockNode* block,
- Err* err) {
- if (!EnsureNotProcessingImport(function, scope, err) ||
- !EnsureNotProcessingBuildConfig(function, scope, err))
- return Value();
- Scope block_scope(scope);
- if (!FillTargetBlockScope(scope, function, target_type, block,
- args, &block_scope, err))
- return Value();
-
- block->ExecuteBlockInScope(&block_scope, err);
- if (err->has_error())
- return Value();
-
- TargetGenerator::GenerateTarget(&block_scope, function->function(), args,
- target_type, err);
-
- block_scope.CheckForUnusedVars(err);
- return Value();
-}
-
-} // namespace
-
-Value ExecuteComponent(Scope* scope,
- const FunctionCallNode* function,
- const std::vector<Value>& args,
- BlockNode* block,
- Err* err) {
- // A component is either a shared or static library, depending on the value
- // of |component_mode|.
- const Value* component_mode_value = scope->GetValue("component_mode");
-
- static const char helptext[] =
- "You're declaring a component here but have not defined "
- "\"component_mode\" to\neither \"shared_library\" or \"static_library\".";
- if (!component_mode_value) {
- *err = Err(function->function(), "No component mode set.", helptext);
- return Value();
- }
- if (component_mode_value->type() != Value::STRING ||
- (component_mode_value->string_value() != functions::kSharedLibrary &&
- component_mode_value->string_value() != functions::kStaticLibrary)) {
- *err = Err(function->function(), "Invalid component mode set.", helptext);
- return Value();
- }
- const std::string& component_mode = component_mode_value->string_value();
-
- if (!EnsureNotProcessingImport(function, scope, err))
- return Value();
- Scope block_scope(scope);
- if (!FillTargetBlockScope(scope, function, component_mode.c_str(), block,
- args, &block_scope, err))
- return Value();
-
- block->ExecuteBlockInScope(&block_scope, err);
- if (err->has_error())
- return Value();
-
- TargetGenerator::GenerateTarget(&block_scope, function->function(), args,
- component_mode, err);
- return Value();
-}
-
-Value ExecuteCopy(Scope* scope,
- const FunctionCallNode* function,
- const std::vector<Value>& args,
- Err* err) {
- if (!EnsureNotProcessingImport(function, scope, err) ||
- !EnsureNotProcessingBuildConfig(function, scope, err))
- return Value();
- TargetGenerator::GenerateTarget(scope, function->function(), args,
- functions::kCopy, err);
- return Value();
-}
-
-/*
-custom: Declare a script-generated target.
-
- This target type allows you to run a script over a set of sources files and
- generate a set of output files.
-
- The script will be executed with the given arguments with the current
- directory being that of the current BUILD file.
-
- There are two modes. The first mode is the "per-file" mode where you
- specify a list of sources and the script is run once for each one as a build
- rule. In this case, each file specified in the |outputs| variable must be
- unique when applied to each source file (normally you would reference
- "{{source_name_part}}" from within each one) or the build system will get
- confused about how to build those files. You should use the |data| variable
- to list all additional dependencies of your script: these will be added
- as dependencies for each build step.
-
- The second mode is when you just want to run a script once rather than as a
- general rule over a set of files. In this case you don't list any sources.
- Dependencies of your script are specified only in the |data| variable and
- your |outputs| variable should just list all outputs.
-
-Variables:
-
- args, data, deps, outputs, script*, sources
- * = required
-
- There are some special substrings that will be searched for when processing
- some variables:
-
- "{{source}}"
- Expanded in |args|, this is the name of the source file relative to the
- current directory when running the script. This is how you specify
- the current input file to your script.
-
- "{{source_name_part}}"
- Expanded in |args| and |outputs|, this is just the filename part of the
- current source file with no directory or extension. This is how you
- specify a name transoformation to the output. Normally you would
- write an output as "$target_output_dir/{{source_name_part}}.o".
-
- All |outputs| files must be inside the output directory of the build. You
- would generally use "$target_output_dir" or "$target_gen_dir" to reference
- the output or generated intermediate file directories, respectively.
-
-Examples:
-
- custom("general_rule") {
- script = "do_processing.py"
- sources = [ "foo.idl" ]
- data = [ "my_configuration.txt" ]
- outputs = [ "$target_gen_dir/{{source_name_part}}.h" ]
- args = [ "{{source}}",
- "-o", "$relative_target_gen_dir/{{source_name_part}}.h" ]
- }
-
- custom("just_run_this_guy_once") {
- script = "doprocessing.py"
- data = [ "my_configuration.txt" ]
- outputs = [ "$target_gen_dir/insightful_output.txt" ]
- args = [ "--output_dir", $target_gen_dir ]
- }
-*/
-Value ExecuteCustom(Scope* scope,
- const FunctionCallNode* function,
- const std::vector<Value>& args,
- BlockNode* block,
- Err* err) {
- return ExecuteGenericTarget(functions::kCustom, scope, function, args,
- block, err);
-}
-
-Value ExecuteExecutable(Scope* scope,
- const FunctionCallNode* function,
- const std::vector<Value>& args,
- BlockNode* block,
- Err* err) {
- return ExecuteGenericTarget(functions::kExecutable, scope, function, args,
- block, err);
-}
-
-Value ExecuteSharedLibrary(Scope* scope,
- const FunctionCallNode* function,
- const std::vector<Value>& args,
- BlockNode* block,
- Err* err) {
- return ExecuteGenericTarget(functions::kSharedLibrary, scope, function, args,
- block, err);
-}
-
-Value ExecuteStaticLibrary(Scope* scope,
- const FunctionCallNode* function,
- const std::vector<Value>& args,
- BlockNode* block,
- Err* err) {
- return ExecuteGenericTarget(functions::kStaticLibrary, scope, function, args,
- block, err);
-}
-
-/*
-group: Declare a group of targets.
-
- This target type allows you to create meta-targets that just collect a set
- of dependencies into one named target.
-
-Variables:
-
- deps
-
-Example:
-
- group("all") {
- deps = [
- "//project:runner",
- "//project:unit_tests",
- ]
- }
-*/
-Value ExecuteGroup(Scope* scope,
- const FunctionCallNode* function,
- const std::vector<Value>& args,
- BlockNode* block,
- Err* err) {
- return ExecuteGenericTarget(functions::kGroup, scope, function, args,
- block, err);
-}
-
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