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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <algorithm>
#include <set>
#include "base/command_line.h"
#include "tools/gn/commands.h"
#include "tools/gn/label_pattern.h"
#include "tools/gn/setup.h"
#include "tools/gn/standard_out.h"
#include "tools/gn/target.h"
namespace commands {
const char kLs[] = "ls";
const char kLs_HelpShort[] =
"ls: List matching targets.";
const char kLs_Help[] =
"gn ls <build dir> [<label_pattern>] [--out] [--all-toolchains]\n"
"\n"
" Lists all targets matching the given pattern for the given builn\n"
" directory. By default, only targets in the default toolchain will\n"
" be matched unless a toolchain is explicitly supplied.\n"
"\n"
" If the label pattern is unspecified, list all targets. The label\n"
" pattern is not a general regular expression (see\n"
" \"gn help label_pattern\"). If you need more complex expressions,\n"
" pipe the result through grep.\n"
"\n"
" --out\n"
" Lists the results as the files generated by the matching targets.\n"
" These files will be relative to the build directory such that\n"
" they can be specified on Ninja's command line as a file to build.\n"
"\n"
" --all-toolchains\n"
" Matches all toolchains. If the label pattern does not specify an\n"
" explicit toolchain, labels from all toolchains will be matched.\n"
"\n"
"Examples\n"
"\n"
" gn ls out/Debug\n"
" Lists all targets in the default toolchain.\n"
"\n"
" gn ls out/Debug \"//base/*\"\n"
" Lists all targets in the directory base and all subdirectories.\n"
"\n"
" gn ls out/Debug \"//base:*\"\n"
" Lists all targets defined in //base/BUILD.gn.\n"
"\n"
" gn ls out/Debug //base --out\n"
" Lists the build output file for //base:base\n"
"\n"
" gn ls out/Debug \"//base/*\" --out | xargs ninja -C out/Debug\n"
" Builds all targets in //base and all subdirectories.\n"
"\n"
" gn ls out/Debug //base --all-toolchains\n"
" Lists all variants of the target //base:base (it may be referenced\n"
" in multiple toolchains).\n";
int RunLs(const std::vector<std::string>& args) {
if (args.size() != 1 && args.size() != 2) {
Err(Location(), "You're holding it wrong.",
"Usage: \"gn ls <build dir> [<label_pattern>]\"").PrintToStdout();
return 1;
}
Setup* setup = new Setup;
if (!setup->DoSetup(args[0], false) || !setup->Run())
return 1;
const base::CommandLine* cmdline = base::CommandLine::ForCurrentProcess();
bool all_toolchains = cmdline->HasSwitch("all-toolchains");
// Find matching targets.
std::vector<const Target*> matches;
if (args.size() == 2) {
// Given a pattern, match it.
if (!ResolveTargetsFromCommandLinePattern(setup, args[1], all_toolchains,
&matches))
return 1;
} else if (all_toolchains) {
// List all resolved targets.
matches = setup->builder()->GetAllResolvedTargets();
} else {
// List all resolved targets in the default toolchain.
for (const auto& target : setup->builder()->GetAllResolvedTargets()) {
if (target->settings()->is_default())
matches.push_back(target);
}
}
if (cmdline->HasSwitch("out")) {
// List results as build files.
for (const auto& match : matches) {
OutputString(match->dependency_output_file().value());
OutputString("\n");
}
} else {
// List results as sorted labels.
std::vector<Label> sorted_matches;
for (const auto& match : matches)
sorted_matches.push_back(match->label());
std::sort(sorted_matches.begin(), sorted_matches.end());
Label default_tc_label = setup->loader()->default_toolchain_label();
for (const auto& match : sorted_matches) {
// Print toolchain only for ones not in the default toolchain.
OutputString(match.GetUserVisibleName(
match.GetToolchainLabel() != default_tc_label));
OutputString("\n");
}
}
return 0;
}
} // namespace commands
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