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.
7 #include "base/command_line.h"
8 #include "tools/gn/commands.h"
9 #include "tools/gn/filesystem_utils.h"
10 #include "tools/gn/input_file.h"
11 #include "tools/gn/item.h"
12 #include "tools/gn/pattern.h"
13 #include "tools/gn/setup.h"
14 #include "tools/gn/standard_out.h"
15 #include "tools/gn/target.h"
21 // Returns the file path generating this record.
22 base::FilePath FilePathForRecord(const BuilderRecord* record) {
24 return base::FilePath(FILE_PATH_LITERAL("=UNRESOLVED DEPENDENCY="));
25 return record->item()->defined_from()->GetRange().begin().file()
31 const char kRefs[] = "refs";
32 const char kRefs_HelpShort[] =
33 "refs: Find stuff referencing a target, directory, or config.";
34 const char kRefs_Help[] =
35 "gn refs <label_pattern> [--files]\n"
37 " Finds code referencing a given label. The label can be a\n"
38 " target or config name. Unlike most other commands, unresolved\n"
39 " dependencies will be tolerated. This allows you to use this command\n"
40 " to find references to targets you're in the process of moving.\n"
42 " By default, the mapping from source item to dest item (where the\n"
43 " pattern matches the dest item). See \"gn help pattern\" for\n"
44 " information on pattern-matching rules.\n"
48 " Output unique filenames referencing a matched target or config.\n"
51 " gn refs \"//tools/gn/*\"\n"
52 " Find all targets depending on any target or config in the\n"
53 " \"tools/gn\" directory.\n"
55 " gn refs //tools/gn:gn\n"
56 " Find all targets depending on the given exact target name.\n"
58 " gn refs \"*gtk*\" --files\n"
59 " Find all unique buildfiles with a dependency on a target that has\n"
60 " the substring \"gtk\" in the name.\n";
62 int RunRefs(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 refs <label_pattern>\"").PrintToStdout();
69 Pattern pattern(args[0]);
70 // Check for common errors on input.
71 if (args[0].find('*') == std::string::npos) {
72 // We need to begin with a "//" and have a colon if there's no "*" or it
73 // will be impossible to match anything.
74 if (args[0].size() < 2 ||
75 (args[0][0] != '/' && args[0][1] != '/') ||
76 args[0].find(':') == std::string::npos) {
77 OutputString("Assuming \"*" + args[0] +
78 "*\". See \"gn help refs\" for more information.\n",
80 pattern = Pattern("*" + args[0] + "*");
84 Setup* setup = new Setup;
85 setup->set_check_for_bad_items(false);
86 // TODO(brettw) bug 343726: Use a temporary directory instead of this
87 // default one to avoid messing up any build that's in there.
88 if (!setup->DoSetup("//out/Default/") || !setup->Run())
91 std::vector<const BuilderRecord*> records = setup->builder()->GetAllRecords();
93 const CommandLine* cmdline = CommandLine::ForCurrentProcess();
95 bool file_output = cmdline->HasSwitch("files");
96 std::set<std::string> unique_output;
98 for (size_t record_index = 0; record_index < records.size(); record_index++) {
99 const BuilderRecord* record = records[record_index];
100 const BuilderRecord::BuilderRecordSet& deps = record->all_deps();
101 for (BuilderRecord::BuilderRecordSet::const_iterator d = deps.begin();
102 d != deps.end(); ++d) {
103 std::string label = (*d)->label().GetUserVisibleName(false);
104 if (pattern.MatchesString(label)) {
107 unique_output.insert(FilePathToUTF8(FilePathForRecord(record)));
108 break; // Found a match for this target's file, don't need more.
110 // We can get dupes when there are differnet toolchains involved,
111 // so we want to send all output through the de-duper.
112 unique_output.insert(
113 record->item()->label().GetUserVisibleName(false) + " -> " +
120 for (std::set<std::string>::iterator i = unique_output.begin();
121 i != unique_output.end(); ++i)
122 OutputString(*i + "\n");
127 } // namespace commands