tools/gn/setup.h

   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 #ifndef TOOLS_GN_SETUP_H_
   6 #define TOOLS_GN_SETUP_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/files/file_path.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "tools/gn/build_settings.h"
  14 #include "tools/gn/scheduler.h"
  15 #include "tools/gn/scope.h"
  16 #include "tools/gn/settings.h"
  17 #include "tools/gn/token.h"
  18 #include "tools/gn/toolchain.h"
  19
  20 class CommandLine;
  21 class InputFile;
  22 class ParseNode;
  23
  24 extern const char kDotfile_Help[];
  25
  26 // Helper class to setup the build settings and environment for the various
  27 // commands to run.
  28 class Setup {
  29  public:
  30   Setup();
  31   ~Setup();
  32
  33   // Configures the build for the current command line. On success returns
  34   // true. On failure, prints the error and returns false.
  35   bool DoSetup();
  36
  37   // When true (the default), Run() will check for unresolved dependencies and
  38   // cycles upon completion. When false, such errors will be ignored.
  39   void set_check_for_bad_items(bool s) { check_for_bad_items_ = s; }
  40
  41   // Runs the load, returning true on success. On failure, prints the error
  42   // and returns false.
  43   bool Run();
  44
  45   BuildSettings& build_settings() { return build_settings_; }
  46   Scheduler& scheduler() { return scheduler_; }
  47
  48  private:
  49   // Fills build arguments. Returns true on success.
  50   bool FillArguments(const CommandLine& cmdline);
  51
  52   // Fills the root directory into the settings. Returns true on success.
  53   bool FillSourceDir(const CommandLine& cmdline);
  54
  55   // Fills the python path portion of the command line. On failure, sets
  56   // it to just "python".
  57   void FillPythonPath();
  58
  59   // Run config file.
  60   bool RunConfigFile();
  61
  62   bool FillOtherConfig(const CommandLine& cmdline);
  63
  64   BuildSettings build_settings_;
  65   Scheduler scheduler_;
  66
  67   bool check_for_bad_items_;
  68
  69   // These empty settings and toolchain are used to interpret the command line
  70   // and dot file.
  71   BuildSettings empty_build_settings_;
  72   Toolchain empty_toolchain_;
  73   Settings empty_settings_;
  74   Scope dotfile_scope_;
  75
  76   // State for invoking the dotfile.
  77   base::FilePath dotfile_name_;
  78   scoped_ptr<InputFile> dotfile_input_file_;
  79   std::vector<Token> dotfile_tokens_;
  80   scoped_ptr<ParseNode> dotfile_root_;
  81
  82   // State for invoking the command line args. We specifically want to keep
  83   // this around for the entire run so that Values can blame to the command
  84   // line when we issue errors about them.
  85   scoped_ptr<InputFile> args_input_file_;
  86   std::vector<Token> args_tokens_;
  87   scoped_ptr<ParseNode> args_root_;
  88
  89   DISALLOW_COPY_AND_ASSIGN(Setup);
  90 };
  91
  92 #endif  // TOOLS_GN_SETUP_H_