| // 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 "gn/action_target_generator.h" |
| |
| #include "base/stl_util.h" |
| #include "gn/build_settings.h" |
| #include "gn/config_values_generator.h" |
| #include "gn/err.h" |
| #include "gn/filesystem_utils.h" |
| #include "gn/functions.h" |
| #include "gn/parse_tree.h" |
| #include "gn/scope.h" |
| #include "gn/value.h" |
| #include "gn/value_extractors.h" |
| #include "gn/variables.h" |
| |
| ActionTargetGenerator::ActionTargetGenerator( |
| Target* target, |
| Scope* scope, |
| const FunctionCallNode* function_call, |
| Target::OutputType type, |
| Err* err) |
| : TargetGenerator(target, scope, function_call, err), output_type_(type) {} |
| |
| ActionTargetGenerator::~ActionTargetGenerator() = default; |
| |
| void ActionTargetGenerator::DoRun() { |
| target_->set_output_type(output_type_); |
| |
| if (!FillSources()) |
| return; |
| if (output_type_ == Target::ACTION_FOREACH && target_->sources().empty()) { |
| // Foreach rules must always have some sources to have an effect. |
| *err_ = |
| Err(function_call_, "action_foreach target has no sources.", |
| "If you don't specify any sources, there is nothing to run your\n" |
| "script over."); |
| return; |
| } |
| |
| if (!FillInputs()) |
| return; |
| |
| if (!FillScript()) |
| return; |
| |
| if (!FillScriptArgs()) |
| return; |
| |
| if (!FillResponseFileContents()) |
| return; |
| |
| if (!FillOutputs(output_type_ == Target::ACTION_FOREACH)) |
| return; |
| |
| if (!FillDepfile()) |
| return; |
| |
| if (!FillPool()) |
| return; |
| |
| if (!FillCheckIncludes()) |
| return; |
| |
| if (!FillConfigs()) |
| return; |
| |
| if (!CheckOutputs()) |
| return; |
| |
| // Config values (compiler flags, etc.) set directly on this target. |
| ConfigValuesGenerator gen(&target_->config_values(), scope_, |
| scope_->GetSourceDir(), err_); |
| gen.Run(); |
| if (err_->has_error()) |
| return; |
| |
| // Action outputs don't depend on the current toolchain so we can skip adding |
| // that dependency. |
| |
| // response_file_contents and {{response_file_name}} in the args must go |
| // together. |
| const auto& required_args_substitutions = |
| target_->action_values().args().required_types(); |
| bool has_rsp_file_name = base::ContainsValue(required_args_substitutions, |
| &SubstitutionRspFileName); |
| if (target_->action_values().uses_rsp_file() && !has_rsp_file_name) { |
| *err_ = Err( |
| function_call_, "Missing {{response_file_name}} in args.", |
| "This target defines response_file_contents but doesn't use\n" |
| "{{response_file_name}} in the args, which means the response file\n" |
| "will be unused."); |
| return; |
| } |
| if (!target_->action_values().uses_rsp_file() && has_rsp_file_name) { |
| *err_ = Err( |
| function_call_, "Missing response_file_contents definition.", |
| "This target uses {{response_file_name}} in the args, but does not\n" |
| "define response_file_contents which means the response file\n" |
| "will be empty."); |
| return; |
| } |
| } |
| |
| bool ActionTargetGenerator::FillScript() { |
| // If this gets called, the target type requires a script, so error out |
| // if it doesn't have one. |
| const Value* value = scope_->GetValue(variables::kScript, true); |
| if (!value) { |
| *err_ = Err(function_call_, "This target type requires a \"script\"."); |
| return false; |
| } |
| if (!value->VerifyTypeIs(Value::STRING, err_)) |
| return false; |
| |
| SourceFile script_file = scope_->GetSourceDir().ResolveRelativeFile( |
| *value, err_, scope_->settings()->build_settings()->root_path_utf8()); |
| if (err_->has_error()) |
| return false; |
| target_->action_values().set_script(script_file); |
| return true; |
| } |
| |
| bool ActionTargetGenerator::FillScriptArgs() { |
| const Value* value = scope_->GetValue(variables::kArgs, true); |
| if (!value) |
| return true; // Nothing to do. |
| |
| if (!target_->action_values().args().Parse(*value, err_)) |
| return false; |
| if (!EnsureValidSubstitutions( |
| target_->action_values().args().required_types(), |
| &IsValidScriptArgsSubstitution, value->origin(), err_)) |
| return false; |
| |
| return true; |
| } |
| |
| bool ActionTargetGenerator::FillResponseFileContents() { |
| const Value* value = scope_->GetValue(variables::kResponseFileContents, true); |
| if (!value) |
| return true; // Nothing to do. |
| |
| if (!target_->action_values().rsp_file_contents().Parse(*value, err_)) |
| return false; |
| if (!EnsureValidSubstitutions( |
| target_->action_values().rsp_file_contents().required_types(), |
| &IsValidSourceSubstitution, value->origin(), err_)) |
| return false; |
| |
| return true; |
| } |
| |
| bool ActionTargetGenerator::FillDepfile() { |
| const Value* value = scope_->GetValue(variables::kDepfile, true); |
| if (!value) |
| return true; |
| |
| SubstitutionPattern depfile; |
| if (!depfile.Parse(*value, err_)) |
| return false; |
| if (!EnsureSubstitutionIsInOutputDir(depfile, *value)) |
| return false; |
| |
| target_->action_values().set_depfile(depfile); |
| return true; |
| } |
| |
| bool ActionTargetGenerator::FillPool() { |
| const Value* value = scope_->GetValue(variables::kPool, true); |
| if (!value) |
| return true; |
| |
| Label label = |
| Label::Resolve(scope_->GetSourceDir(), |
| scope_->settings()->build_settings()->root_path_utf8(), |
| ToolchainLabelForScope(scope_), *value, err_); |
| if (err_->has_error()) |
| return false; |
| |
| LabelPtrPair<Pool> pair(label); |
| pair.origin = target_->defined_from(); |
| |
| target_->action_values().set_pool(std::move(pair)); |
| return true; |
| } |
| |
| bool ActionTargetGenerator::CheckOutputs() { |
| const SubstitutionList& outputs = target_->action_values().outputs(); |
| if (outputs.list().empty()) { |
| *err_ = |
| Err(function_call_, "Action has no outputs.", |
| "If you have no outputs, the build system can not tell when your\n" |
| "script needs to be run."); |
| return false; |
| } |
| |
| if (output_type_ == Target::ACTION) { |
| if (!outputs.required_types().empty()) { |
| *err_ = Err( |
| function_call_, "Action has patterns in the output.", |
| "An action target should have the outputs completely specified. If\n" |
| "you want to provide a mapping from source to output, use an\n" |
| "\"action_foreach\" target."); |
| return false; |
| } |
| } else if (output_type_ == Target::ACTION_FOREACH) { |
| // A foreach target should always have a pattern in the outputs. |
| if (outputs.required_types().empty()) { |
| *err_ = Err( |
| function_call_, "action_foreach should have a pattern in the output.", |
| "An action_foreach target should have a source expansion pattern in\n" |
| "it to map source file to unique output file name. Otherwise, the\n" |
| "build system can't determine when your script needs to be run."); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool ActionTargetGenerator::FillInputs() { |
| const Value* value = scope_->GetValue(variables::kInputs, true); |
| if (!value) |
| return true; |
| |
| Target::FileList dest_inputs; |
| if (!ExtractListOfRelativeFiles(scope_->settings()->build_settings(), *value, |
| scope_->GetSourceDir(), &dest_inputs, err_)) |
| return false; |
| target_->config_values().inputs().swap(dest_inputs); |
| return true; |
| } |