Home | History | Annotate | Download | only in gn 
      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 
      7 #include "tools/gn/item.h"
      8 #include "tools/gn/item_node.h"
      9 #include "tools/gn/label.h"
     10 #include "tools/gn/setup.h"
     11 #include "tools/gn/standard_out.h"
     12 #include "tools/gn/target.h"
     13 
     14 namespace commands {
     15 
     16 CommandInfo::CommandInfo()
     17     : help_short(NULL),
     18       help(NULL),
     19       runner(NULL) {
     20 }
     21 
     22 CommandInfo::CommandInfo(const char* in_help_short,
     23                          const char* in_help,
     24                          CommandRunner in_runner)
     25     : help_short(in_help_short),
     26       help(in_help),
     27       runner(in_runner) {
     28 }
     29 
     30 const CommandInfoMap& GetCommands() {
     31   static CommandInfoMap info_map;
     32   if (info_map.empty()) {
     33     #define INSERT_COMMAND(cmd) \
     34         info_map[k##cmd] = CommandInfo(k##cmd##_HelpShort, \
     35                                        k##cmd##_Help, \
     36                                        &Run##cmd);
     37 
     38     INSERT_COMMAND(Desc)
     39     INSERT_COMMAND(Gen)
     40     INSERT_COMMAND(Help)
     41 
     42     #undef INSERT_COMMAND
     43   }
     44   return info_map;
     45 }
     46 
     47 const Target* GetTargetForDesc(const std::vector<std::string>& args) {
     48   // Deliberately leaked to avoid expensive process teardown.
     49   Setup* setup = new Setup;
     50   if (!setup->DoSetup())
     51     return NULL;
     52 
     53   // FIXME(brettw): set the output dir to be a sandbox one to avoid polluting
     54   // the real output dir with files written by the build scripts.
     55 
     56   // Do the actual load. This will also write out the target ninja files.
     57   if (!setup->Run())
     58     return NULL;
     59 
     60   // Need to resolve the label after we know the default toolchain.
     61   // TODO(brettw) find the current directory and resolve the input label
     62   // relative to that.
     63   Label default_toolchain = setup->build_settings().toolchain_manager()
     64       .GetDefaultToolchainUnlocked();
     65   Value arg_value(NULL, args[0]);
     66   Err err;
     67   Label label = Label::Resolve(SourceDir(), default_toolchain, arg_value, &err);
     68   if (err.has_error()) {
     69     err.PrintToStdout();
     70     return NULL;
     71   }
     72 
     73   ItemNode* node;
     74   {
     75     base::AutoLock lock(setup->build_settings().item_tree().lock());
     76     node = setup->build_settings().item_tree().GetExistingNodeLocked(label);
     77   }
     78   if (!node) {
     79     Err(Location(), "",
     80         "I don't know about this \"" + label.GetUserVisibleName(false) +
     81         "\"").PrintToStdout();
     82     return NULL;
     83   }
     84 
     85   const Target* target = node->item()->AsTarget();
     86   if (!target) {
     87     Err(Location(), "Not a target.",
     88         "The \"" + label.GetUserVisibleName(false) + "\" thing\n"
     89         "is not a target. Somebody should probably implement this command for "
     90         "other\nitem types.");
     91     return NULL;
     92   }
     93 
     94   return target;
     95 }
     96 
     97 }  // namespace commands
     98