tools/gn/target_generator.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "tools/gn/target_generator.h"
   6
   7 #include "tools/gn/action_target_generator.h"
   8 #include "tools/gn/binary_target_generator.h"
   9 #include "tools/gn/build_settings.h"
  10 #include "tools/gn/config.h"
  11 #include "tools/gn/copy_target_generator.h"
  12 #include "tools/gn/err.h"
  13 #include "tools/gn/filesystem_utils.h"
  14 #include "tools/gn/functions.h"
  15 #include "tools/gn/group_target_generator.h"
  16 #include "tools/gn/parse_tree.h"
  17 #include "tools/gn/scheduler.h"
  18 #include "tools/gn/scope.h"
  19 #include "tools/gn/token.h"
  20 #include "tools/gn/value.h"
  21 #include "tools/gn/value_extractors.h"
  22 #include "tools/gn/variables.h"
  23
  24 TargetGenerator::TargetGenerator(Target* target,
  25                                  Scope* scope,
  26                                  const FunctionCallNode* function_call,
  27                                  Err* err)
  28     : target_(target),
  29       scope_(scope),
  30       function_call_(function_call),
  31       err_(err) {
  32 }
  33
  34 TargetGenerator::~TargetGenerator() {
  35 }
  36
  37 void TargetGenerator::Run() {
  38   // All target types use these.
  39   FillDependentConfigs();
  40   if (err_->has_error())
  41     return;
  42
  43   FillData();
  44   if (err_->has_error())
  45     return;
  46
  47   FillDependencies();
  48   if (err_->has_error())
  49     return;
  50
  51   if (!Visibility::FillItemVisibility(target_, scope_, err_))
  52     return;
  53
  54   // Do type-specific generation.
  55   DoRun();
  56 }
  57
  58 // static
  59 void TargetGenerator::GenerateTarget(Scope* scope,
  60                                      const FunctionCallNode* function_call,
  61                                      const std::vector<Value>& args,
  62                                      const std::string& output_type,
  63                                      Err* err) {
  64   // Name is the argument to the function.
  65   if (args.size() != 1u || args[0].type() != Value::STRING) {
  66     *err = Err(function_call,
  67         "Target generator requires one string argument.",
  68         "Otherwise I'm not sure what to call this target.");
  69     return;
  70   }
  71
  72   // The location of the target is the directory name with no slash at the end.
  73   // FIXME(brettw) validate name.
  74   const Label& toolchain_label = ToolchainLabelForScope(scope);
  75   Label label(scope->GetSourceDir(), args[0].string_value(),
  76               toolchain_label.dir(), toolchain_label.name());
  77
  78   if (g_scheduler->verbose_logging())
  79     g_scheduler->Log("Defining target", label.GetUserVisibleName(true));
  80
  81   scoped_ptr<Target> target(new Target(scope->settings(), label));
  82   target->set_defined_from(function_call);
  83
  84   // Create and call out to the proper generator.
  85   if (output_type == functions::kCopy) {
  86     CopyTargetGenerator generator(target.get(), scope, function_call, err);
  87     generator.Run();
  88   } else if (output_type == functions::kAction) {
  89     ActionTargetGenerator generator(target.get(), scope, function_call,
  90                                     Target::ACTION, err);
  91     generator.Run();
  92   } else if (output_type == functions::kActionForEach) {
  93     ActionTargetGenerator generator(target.get(), scope, function_call,
  94                                     Target::ACTION_FOREACH, err);
  95     generator.Run();
  96   } else if (output_type == functions::kExecutable) {
  97     BinaryTargetGenerator generator(target.get(), scope, function_call,
  98                                     Target::EXECUTABLE, err);
  99     generator.Run();
 100   } else if (output_type == functions::kGroup) {
 101     GroupTargetGenerator generator(target.get(), scope, function_call, err);
 102     generator.Run();
 103   } else if (output_type == functions::kSharedLibrary) {
 104     BinaryTargetGenerator generator(target.get(), scope, function_call,
 105                                     Target::SHARED_LIBRARY, err);
 106     generator.Run();
 107   } else if (output_type == functions::kSourceSet) {
 108     BinaryTargetGenerator generator(target.get(), scope, function_call,
 109                                     Target::SOURCE_SET, err);
 110     generator.Run();
 111   } else if (output_type == functions::kStaticLibrary) {
 112     BinaryTargetGenerator generator(target.get(), scope, function_call,
 113                                     Target::STATIC_LIBRARY, err);
 114     generator.Run();
 115   } else {
 116     *err = Err(function_call, "Not a known output type",
 117                "I am very confused.");
 118   }
 119
 120   if (err->has_error())
 121     return;
 122
 123   // Save this target for the file.
 124   Scope::ItemVector* collector = scope->GetItemCollector();
 125   if (!collector) {
 126     *err = Err(function_call, "Can't define a target in this context.");
 127     return;
 128   }
 129   collector->push_back(new scoped_ptr<Item>(target.PassAs<Item>()));
 130 }
 131
 132 const BuildSettings* TargetGenerator::GetBuildSettings() const {
 133   return scope_->settings()->build_settings();
 134 }
 135
 136 void TargetGenerator::FillSources() {
 137   const Value* value = scope_->GetValue(variables::kSources, true);
 138   if (!value)
 139     return;
 140
 141   Target::FileList dest_sources;
 142   if (!ExtractListOfRelativeFiles(scope_->settings()->build_settings(), *value,
 143                                   scope_->GetSourceDir(), &dest_sources, err_))
 144     return;
 145   target_->sources().swap(dest_sources);
 146 }
 147
 148 void TargetGenerator::FillPublic() {
 149   const Value* value = scope_->GetValue(variables::kPublic, true);
 150   if (!value)
 151     return;
 152
 153   // If the public headers are defined, don't default to public.
 154   target_->set_all_headers_public(false);
 155
 156   Target::FileList dest_public;
 157   if (!ExtractListOfRelativeFiles(scope_->settings()->build_settings(), *value,
 158                                   scope_->GetSourceDir(), &dest_public, err_))
 159     return;
 160   target_->public_headers().swap(dest_public);
 161 }
 162
 163 void TargetGenerator::FillInputs() {
 164   const Value* value = scope_->GetValue(variables::kInputs, true);
 165   if (!value) {
 166     // Older versions used "source_prereqs". Allow use of this variable until
 167     // all callers are updated.
 168     // TODO(brettw) remove this eventually.
 169     value = scope_->GetValue("source_prereqs", true);
 170
 171     if (!value)
 172       return;
 173   }
 174
 175   Target::FileList dest_inputs;
 176   if (!ExtractListOfRelativeFiles(scope_->settings()->build_settings(), *value,
 177                                   scope_->GetSourceDir(), &dest_inputs, err_))
 178     return;
 179   target_->inputs().swap(dest_inputs);
 180 }
 181
 182 void TargetGenerator::FillConfigs() {
 183   FillGenericConfigs(variables::kConfigs, &target_->configs());
 184 }
 185
 186 void TargetGenerator::FillDependentConfigs() {
 187   FillGenericConfigs(variables::kAllDependentConfigs,
 188                      &target_->all_dependent_configs());
 189   FillGenericConfigs(variables::kDirectDependentConfigs,
 190                      &target_->direct_dependent_configs());
 191 }
 192
 193 void TargetGenerator::FillData() {
 194   const Value* value = scope_->GetValue(variables::kData, true);
 195   if (!value)
 196     return;
 197
 198   Target::FileList dest_data;
 199   if (!ExtractListOfRelativeFiles(scope_->settings()->build_settings(), *value,
 200                                   scope_->GetSourceDir(), &dest_data, err_))
 201     return;
 202   target_->data().swap(dest_data);
 203 }
 204
 205 void TargetGenerator::FillDependencies() {
 206   FillGenericDeps(variables::kDeps, &target_->deps());
 207   if (err_->has_error())
 208     return;
 209   FillGenericDeps(variables::kDatadeps, &target_->datadeps());
 210   if (err_->has_error())
 211     return;
 212
 213   // This is a list of dependent targets to have their configs fowarded, so
 214   // it goes here rather than in FillConfigs.
 215   FillForwardDependentConfigs();
 216   if (err_->has_error())
 217     return;
 218 }
 219
 220 void TargetGenerator::FillOutputs() {
 221   const Value* value = scope_->GetValue(variables::kOutputs, true);
 222   if (!value)
 223     return;
 224
 225   Target::FileList outputs;
 226   if (!ExtractListOfRelativeFiles(scope_->settings()->build_settings(), *value,
 227                                   scope_->GetSourceDir(), &outputs, err_))
 228     return;
 229
 230   // Validate that outputs are in the output dir.
 231   CHECK(outputs.size() == value->list_value().size());
 232   for (size_t i = 0; i < outputs.size(); i++) {
 233     if (!EnsureStringIsInOutputDir(
 234             GetBuildSettings()->build_dir(),
 235             outputs[i].value(), value->list_value()[i], err_))
 236       return;
 237   }
 238   target_->action_values().outputs().swap(outputs);
 239 }
 240
 241 void TargetGenerator::FillGenericConfigs(const char* var_name,
 242                                          LabelConfigVector* dest) {
 243   const Value* value = scope_->GetValue(var_name, true);
 244   if (value) {
 245     ExtractListOfLabels(*value, scope_->GetSourceDir(),
 246                         ToolchainLabelForScope(scope_), dest, err_);
 247   }
 248 }
 249
 250 void TargetGenerator::FillGenericDeps(const char* var_name,
 251                                       LabelTargetVector* dest) {
 252   const Value* value = scope_->GetValue(var_name, true);
 253   if (value) {
 254     ExtractListOfLabels(*value, scope_->GetSourceDir(),
 255                         ToolchainLabelForScope(scope_), dest, err_);
 256   }
 257 }
 258
 259 void TargetGenerator::FillForwardDependentConfigs() {
 260   const Value* value = scope_->GetValue(
 261       variables::kForwardDependentConfigsFrom, true);
 262   if (value) {
 263     ExtractListOfLabels(*value, scope_->GetSourceDir(),
 264                         ToolchainLabelForScope(scope_),
 265                         &target_->forward_dependent_configs(), err_);
 266   }
 267 }