tools/gn/commands.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/commands.h"
   6 #include "tools/gn/filesystem_utils.h"
   7 #include "tools/gn/item.h"
   8 #include "tools/gn/label.h"
   9 #include "tools/gn/setup.h"
  10 #include "tools/gn/standard_out.h"
  11 #include "tools/gn/target.h"
  12
  13 namespace commands {
  14
  15 CommandInfo::CommandInfo()
  16     : help_short(NULL),
  17       help(NULL),
  18       runner(NULL) {
  19 }
  20
  21 CommandInfo::CommandInfo(const char* in_help_short,
  22                          const char* in_help,
  23                          CommandRunner in_runner)
  24     : help_short(in_help_short),
  25       help(in_help),
  26       runner(in_runner) {
  27 }
  28
  29 const CommandInfoMap& GetCommands() {
  30   static CommandInfoMap info_map;
  31   if (info_map.empty()) {
  32     #define INSERT_COMMAND(cmd) \
  33         info_map[k##cmd] = CommandInfo(k##cmd##_HelpShort, \
  34                                        k##cmd##_Help, \
  35                                        &Run##cmd);
  36
  37     INSERT_COMMAND(Args)
  38     INSERT_COMMAND(Check)
  39     INSERT_COMMAND(Desc)
  40     INSERT_COMMAND(Gen)
  41     INSERT_COMMAND(Help)
  42     INSERT_COMMAND(Refs)
  43
  44     #undef INSERT_COMMAND
  45   }
  46   return info_map;
  47 }
  48
  49 const Target* GetTargetForDesc(const std::vector<std::string>& args) {
  50   // Deliberately leaked to avoid expensive process teardown.
  51   Setup* setup = new Setup;
  52   // TODO(brettw) bug 343726: Use a temporary directory instead of this
  53   // default one to avoid messing up any build that's in there.
  54   if (!setup->DoSetup("//out/Default/"))
  55     return NULL;
  56
  57   // Do the actual load. This will also write out the target ninja files.
  58   if (!setup->Run())
  59     return NULL;
  60
  61   // Need to resolve the label after we know the default toolchain.
  62   Label default_toolchain = setup->loader()->default_toolchain_label();
  63   Value arg_value(NULL, args[0]);
  64   Err err;
  65   Label label = Label::Resolve(SourceDirForCurrentDirectory(
  66                                    setup->build_settings().root_path()),
  67                                default_toolchain, arg_value, &err);
  68   if (err.has_error()) {
  69     err.PrintToStdout();
  70     return NULL;
  71   }
  72
  73   const Item* item = setup->builder()->GetItem(label);
  74   if (!item) {
  75     Err(Location(), "Label not found.",
  76         label.GetUserVisibleName(false) + " not found.").PrintToStdout();
  77     return NULL;
  78   }
  79
  80   const Target* target = item->AsTarget();
  81   if (!target) {
  82     Err(Location(), "Not a target.",
  83         "The \"" + label.GetUserVisibleName(false) + "\" thing\n"
  84         "is not a target. Somebody should probably implement this command for "
  85         "other\nitem types.");
  86     return NULL;
  87   }
  88
  89   return target;
  90 }
  91
  92 }  // namespace commands