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/item.h"
   7 #include "tools/gn/item_node.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(Desc)
  39     INSERT_COMMAND(Gen)
  40     INSERT_COMMAND(Gyp)
  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   if (!setup->DoSetup())
  53     return NULL;
  54
  55   // FIXME(brettw): set the output dir to be a sandbox one to avoid polluting
  56   // the real output dir with files written by the build scripts.
  57
  58   // Do the actual load. This will also write out the target ninja files.
  59   if (!setup->Run())
  60     return NULL;
  61
  62   // Need to resolve the label after we know the default toolchain.
  63   // TODO(brettw) find the current directory and resolve the input label
  64   // relative to that.
  65   Label default_toolchain = setup->build_settings().toolchain_manager()
  66       .GetDefaultToolchainUnlocked();
  67   Value arg_value(NULL, args[0]);
  68   Err err;
  69   Label label =
  70       Label::Resolve(SourceDir("//"), default_toolchain, arg_value, &err);
  71   if (err.has_error()) {
  72     err.PrintToStdout();
  73     return NULL;
  74   }
  75
  76   ItemNode* node;
  77   {
  78     base::AutoLock lock(setup->build_settings().item_tree().lock());
  79     node = setup->build_settings().item_tree().GetExistingNodeLocked(label);
  80   }
  81   if (!node) {
  82     Err(Location(), "",
  83         "I don't know about this \"" + label.GetUserVisibleName(false) +
  84         "\"").PrintToStdout();
  85     return NULL;
  86   }
  87
  88   const Target* target = node->item()->AsTarget();
  89   if (!target) {
  90     Err(Location(), "Not a target.",
  91         "The \"" + label.GetUserVisibleName(false) + "\" thing\n"
  92         "is not a target. Somebody should probably implement this command for "
  93         "other\nitem types.");
  94     return NULL;
  95   }
  96
  97   return target;
  98 }
  99
 100 }  // namespace commands