Revert 214254 "Add initial prototype for the GN meta-buildsystem."

trunk/src/tools/gn/setup.cc

-// 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;
-}