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Diffstat (limited to 'tools/gn/setup.cc')
-rw-r--r-- | tools/gn/setup.cc | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/tools/gn/setup.cc b/tools/gn/setup.cc new file mode 100644 index 0000000..f93cd4d --- /dev/null +++ b/tools/gn/setup.cc @@ -0,0 +1,195 @@ +// 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/setup.h" + +#include "base/command_line.h" +#include "base/file_util.h" +#include "base/files/file_path.h" +#include "tools/gn/filesystem_utils.h" +#include "tools/gn/input_file.h" +#include "tools/gn/parse_tree.h" +#include "tools/gn/parser.h" +#include "tools/gn/source_dir.h" +#include "tools/gn/source_file.h" +#include "tools/gn/tokenizer.h" +#include "tools/gn/value.h" + +namespace { + +// More logging. +const char kSwitchVerbose[] = "v"; + +const char kSwitchRoot[] = "root"; +const char kSecondarySource[] = "secondary"; + +const base::FilePath::CharType kGnFile[] = FILE_PATH_LITERAL(".gn"); + +base::FilePath FindDotFile(const base::FilePath& current_dir) { + base::FilePath try_this_file = current_dir.Append(kGnFile); + if (base::PathExists(try_this_file)) + return try_this_file; + + base::FilePath with_no_slash = current_dir.StripTrailingSeparators(); + base::FilePath up_one_dir = with_no_slash.DirName(); + if (up_one_dir == current_dir) + return base::FilePath(); // Got to the top. + + return FindDotFile(up_one_dir); +} + +} // namespace + +Setup::Setup() + : dotfile_toolchain_(Label()), + dotfile_settings_(&dotfile_build_settings_, &dotfile_toolchain_, + std::string()), + dotfile_scope_(&dotfile_settings_) { +} + +Setup::~Setup() { +} + +bool Setup::DoSetup() { + CommandLine* cmdline = CommandLine::ForCurrentProcess(); + + scheduler_.set_verbose_logging(cmdline->HasSwitch(kSwitchVerbose)); + + if (!FillSourceDir(*cmdline)) + return false; + if (!RunConfigFile()) + return false; + if (!FillOtherConfig(*cmdline)) + return false; + + // FIXME(brettw) get python path! +/*#if defined(OS_WIN) + build_settings_.set_python_path(base::FilePath( + //L"P:\\depot_tools\\python_bin\\python.exe")); + L"C:\\apps\\depot_tools\\python_bin\\python.exe")); +#else*/ + build_settings_.set_python_path(base::FilePath("python")); +//#endif + + build_settings_.SetBuildDir(SourceDir("//out/gn/")); + + return true; +} + +bool Setup::Run() { + // Load the root build file and start runnung. + build_settings_.toolchain_manager().StartLoadingUnlocked( + SourceFile("//BUILD.gn")); + if (!scheduler_.Run()) + return false; + + Err err = build_settings_.item_tree().CheckForBadItems(); + if (err.has_error()) { + err.PrintToStdout(); + return false; + } + return true; +} + +bool Setup::FillSourceDir(const CommandLine& cmdline) { + // Find the .gn file. + base::FilePath root_path; + + // Prefer the command line args to the config file. + base::FilePath relative_root_path = cmdline.GetSwitchValuePath(kSwitchRoot); + if (!relative_root_path.empty()) { + root_path = base::MakeAbsoluteFilePath(relative_root_path); + dotfile_name_ = root_path.Append(kGnFile); + } else { + base::FilePath cur_dir; + file_util::GetCurrentDirectory(&cur_dir); + dotfile_name_ = FindDotFile(cur_dir); + if (dotfile_name_.empty()) { + Err(Location(), "Can't find source root.", + "I could not find a \".gn\" file in the current directory or any " + "parent,\nand the --root command-line argument was not specified.") + .PrintToStdout(); + return false; + } + root_path = dotfile_name_.DirName(); + } + + if (scheduler_.verbose_logging()) + scheduler_.Log("Using source root", FilePathToUTF8(root_path)); + build_settings_.set_root_path(root_path); + + return true; +} + +bool Setup::RunConfigFile() { + if (scheduler_.verbose_logging()) + scheduler_.Log("Got dotfile", FilePathToUTF8(dotfile_name_)); + + dotfile_input_file_.reset(new InputFile(SourceFile("//.gn"))); + if (!dotfile_input_file_->Load(dotfile_name_)) { + Err(Location(), "Could not load dotfile.", + "The file \"" + FilePathToUTF8(dotfile_name_) + "\" cound't be loaded") + .PrintToStdout(); + return false; + } + + Err err; + dotfile_tokens_ = Tokenizer::Tokenize(dotfile_input_file_.get(), &err); + if (err.has_error()) { + err.PrintToStdout(); + return false; + } + + dotfile_root_ = Parser::Parse(dotfile_tokens_, &err); + if (err.has_error()) { + err.PrintToStdout(); + return false; + } + + dotfile_root_->AsBlock()->ExecuteBlockInScope(&dotfile_scope_, &err); + if (err.has_error()) { + err.PrintToStdout(); + return false; + } + + return true; +} + +bool Setup::FillOtherConfig(const CommandLine& cmdline) { + Err err; + + // Secondary source path. + SourceDir secondary_source; + if (cmdline.HasSwitch(kSecondarySource)) { + // Prefer the command line over the config file. + secondary_source = + SourceDir(cmdline.GetSwitchValueASCII(kSecondarySource)); + } else { + // Read from the config file if present. + const Value* secondary_value = + dotfile_scope_.GetValue("secondary_source", true); + if (secondary_value) { + if (!secondary_value->VerifyTypeIs(Value::STRING, &err)) { + err.PrintToStdout(); + return false; + } + build_settings_.SetSecondarySourcePath( + SourceDir(secondary_value->string_value())); + } + } + + // Build config dir. + const Value* build_config_value = + dotfile_scope_.GetValue("buildconfig", true); + if (!build_config_value) { + Err(Location(), "No build config file.", + "Your .gn file (\"" + FilePathToUTF8(dotfile_name_) + "\")\n" + "didn't specify a \"buildconfig\" value.").PrintToStdout(); + return false; + } + build_settings_.set_build_config_file( + SourceFile("//build/config/BUILDCONFIG.gn")); + + return true; +} |