tools/gn/command_ls.cc

   1 // Copyright 2014 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 <algorithm>
   6 #include <set>
   7
   8 #include "base/command_line.h"
   9 #include "tools/gn/commands.h"
  10 #include "tools/gn/label_pattern.h"
  11 #include "tools/gn/setup.h"
  12 #include "tools/gn/standard_out.h"
  13 #include "tools/gn/target.h"
  14
  15 namespace commands {
  16
  17 const char kLs[] = "ls";
  18 const char kLs_HelpShort[] =
  19     "ls: List matching targets.";
  20 const char kLs_Help[] =
  21     "gn ls <build dir> [<label_pattern>] [--out] [--all-toolchains]\n"
  22     "\n"
  23     "  Lists all targets matching the given pattern for the given builn\n"
  24     "  directory. By default, only targets in the default toolchain will\n"
  25     "  be matched unless a toolchain is explicitly supplied.\n"
  26     "\n"
  27     "  If the label pattern is unspecified, list all targets. The label\n"
  28     "  pattern is not a general regular expression (see\n"
  29     "  \"gn help label_pattern\"). If you need more complex expressions,\n"
  30     "  pipe the result through grep.\n"
  31     "\n"
  32     "  --out\n"
  33     "      Lists the results as the files generated by the matching targets.\n"
  34     "      These files will be relative to the build directory such that\n"
  35     "      they can be specified on Ninja's command line as a file to build.\n"
  36     "\n"
  37     "  --all-toolchains\n"
  38     "      Matches all toolchains. If the label pattern does not specify an\n"
  39     "      explicit toolchain, labels from all toolchains will be matched.\n"
  40     "\n"
  41     "Examples\n"
  42     "\n"
  43     "  gn ls out/Debug\n"
  44     "      Lists all targets in the default toolchain.\n"
  45     "\n"
  46     "  gn ls out/Debug \"//base/*\"\n"
  47     "      Lists all targets in the directory base and all subdirectories.\n"
  48     "\n"
  49     "  gn ls out/Debug \"//base:*\"\n"
  50     "      Lists all targets defined in //base/BUILD.gn.\n"
  51     "\n"
  52     "  gn ls out/Debug //base --out\n"
  53     "      Lists the build output file for //base:base\n"
  54     "\n"
  55     "  gn ls out/Debug \"//base/*\" --out | xargs ninja -C out/Debug\n"
  56     "      Builds all targets in //base and all subdirectories.\n"
  57     "\n"
  58     "  gn ls out/Debug //base --all-toolchains\n"
  59     "      Lists all variants of the target //base:base (it may be referenced\n"
  60     "      in multiple toolchains).\n";
  61
  62 int RunLs(const std::vector<std::string>& args) {
  63   if (args.size() != 1 && args.size() != 2) {
  64     Err(Location(), "You're holding it wrong.",
  65         "Usage: \"gn ls <build dir> [<label_pattern>]\"").PrintToStdout();
  66     return 1;
  67   }
  68
  69   Setup* setup = new Setup;
  70   if (!setup->DoSetup(args[0], false) || !setup->Run())
  71     return 1;
  72
  73   const CommandLine* cmdline = CommandLine::ForCurrentProcess();
  74   bool all_toolchains = cmdline->HasSwitch("all-toolchains");
  75
  76   // Find matching targets.
  77   std::vector<const Target*> matches;
  78   if (args.size() == 2) {
  79     // Given a pattern, match it.
  80     if (!ResolveTargetsFromCommandLinePattern(setup, args[1], all_toolchains,
  81                                               &matches))
  82       return 1;
  83   } else if (all_toolchains) {
  84     // List all resolved targets.
  85     matches = setup->builder()->GetAllResolvedTargets();
  86   } else {
  87     // List all resolved targets in the default toolchain.
  88     for (const auto& target : setup->builder()->GetAllResolvedTargets()) {
  89       if (target->settings()->is_default())
  90         matches.push_back(target);
  91     }
  92   }
  93
  94   if (cmdline->HasSwitch("out")) {
  95     // List results as build files.
  96     for (const auto& match : matches) {
  97       OutputString(match->dependency_output_file().value());
  98       OutputString("\n");
  99     }
 100   } else {
 101     // List results as sorted labels.
 102     std::vector<Label> sorted_matches;
 103     for (const auto& match : matches)
 104       sorted_matches.push_back(match->label());
 105     std::sort(sorted_matches.begin(), sorted_matches.end());
 106
 107     Label default_tc_label = setup->loader()->default_toolchain_label();
 108     for (const auto& match : sorted_matches) {
 109       // Print toolchain only for ones not in the default toolchain.
 110       OutputString(match.GetUserVisibleName(
 111           match.GetToolchainLabel() != default_tc_label));
 112       OutputString("\n");
 113     }
 114   }
 115
 116   return 0;
 117 }
 118
 119 }  // namespace commands