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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/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;
}
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