| // Copyright (c) 2013 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 "gn/path_output.h" |
| |
| #include "base/strings/string_util.h" |
| #include "gn/filesystem_utils.h" |
| #include "gn/output_file.h" |
| #include "gn/string_utils.h" |
| #include "util/build_config.h" |
| |
| PathOutput::PathOutput(const SourceDir& current_dir, |
| std::string_view source_root, |
| EscapingMode escaping) |
| : current_dir_(current_dir) { |
| inverse_current_dir_ = RebasePath("//", current_dir, source_root); |
| if (!EndsWithSlash(inverse_current_dir_)) |
| inverse_current_dir_.push_back('/'); |
| options_.mode = escaping; |
| } |
| |
| PathOutput::~PathOutput() = default; |
| |
| void PathOutput::WriteFile(std::ostream& out, const SourceFile& file) const { |
| WritePathStr(out, file.value()); |
| } |
| |
| void PathOutput::WriteDir(std::ostream& out, |
| const SourceDir& dir, |
| DirSlashEnding slash_ending) const { |
| if (dir.value() == "/") { |
| // Writing system root is always a slash (this will normally only come up |
| // on Posix systems). |
| if (slash_ending == DIR_NO_LAST_SLASH) |
| out << "/."; |
| else |
| out << "/"; |
| } else if (dir.value() == "//") { |
| // Writing out the source root. |
| if (slash_ending == DIR_NO_LAST_SLASH) { |
| // The inverse_current_dir_ will contain a [back]slash at the end, so we |
| // can't just write it out. |
| if (inverse_current_dir_.empty()) { |
| out << "."; |
| } else { |
| out.write(inverse_current_dir_.c_str(), |
| inverse_current_dir_.size() - 1); |
| } |
| } else { |
| if (inverse_current_dir_.empty()) |
| out << "./"; |
| else |
| out << inverse_current_dir_; |
| } |
| } else if (dir == current_dir_) { |
| // Writing the same directory. This needs special handling here since |
| // we need to output something else other than the input. |
| if (slash_ending == DIR_INCLUDE_LAST_SLASH) |
| out << "./"; |
| else |
| out << "."; |
| } else if (slash_ending == DIR_INCLUDE_LAST_SLASH) { |
| WritePathStr(out, dir.value()); |
| } else { |
| // DIR_NO_LAST_SLASH mode, just trim the last char. |
| WritePathStr(out, |
| std::string_view(dir.value().data(), dir.value().size() - 1)); |
| } |
| } |
| |
| void PathOutput::WriteFile(std::ostream& out, const OutputFile& file) const { |
| // Here we assume that the path is already preprocessed. |
| EscapeStringToStream(out, file.value(), options_); |
| } |
| |
| void PathOutput::WriteFiles(std::ostream& out, |
| const std::vector<SourceFile>& files) const { |
| for (const auto& file : files) { |
| out << " "; |
| WriteFile(out, file); |
| } |
| } |
| |
| void PathOutput::WriteFiles(std::ostream& out, |
| const std::vector<OutputFile>& files) const { |
| for (const auto& file : files) { |
| out << " "; |
| WriteFile(out, file); |
| } |
| } |
| |
| void PathOutput::WriteFiles(std::ostream& out, |
| const UniqueVector<OutputFile>& files) const { |
| for (const auto& file : files) { |
| out << " "; |
| WriteFile(out, file); |
| } |
| } |
| |
| void PathOutput::WriteDir(std::ostream& out, |
| const OutputFile& file, |
| DirSlashEnding slash_ending) const { |
| DCHECK(file.value().empty() || file.value()[file.value().size() - 1] == '/'); |
| |
| switch (slash_ending) { |
| case DIR_INCLUDE_LAST_SLASH: |
| EscapeStringToStream(out, file.value(), options_); |
| break; |
| case DIR_NO_LAST_SLASH: |
| if (!file.value().empty() && |
| file.value()[file.value().size() - 1] == '/') { |
| // Trim trailing slash. |
| EscapeStringToStream( |
| out, std::string_view(file.value().data(), file.value().size() - 1), |
| options_); |
| } else { |
| // Doesn't end with a slash, write the whole thing. |
| EscapeStringToStream(out, file.value(), options_); |
| } |
| break; |
| } |
| } |
| |
| void PathOutput::WriteFile(std::ostream& out, |
| const base::FilePath& file) const { |
| // Assume native file paths are always absolute. |
| EscapeStringToStream(out, FilePathToUTF8(file), options_); |
| } |
| |
| void PathOutput::WriteSourceRelativeString(std::ostream& out, |
| std::string_view str) const { |
| if (options_.mode == ESCAPE_NINJA_COMMAND) { |
| // Shell escaping needs an intermediate string since it may end up |
| // quoting the whole thing. |
| std::string intermediate; |
| intermediate.reserve(inverse_current_dir_.size() + str.size()); |
| intermediate.assign(inverse_current_dir_.c_str(), |
| inverse_current_dir_.size()); |
| intermediate.append(str.data(), str.size()); |
| |
| EscapeStringToStream( |
| out, std::string_view(intermediate.c_str(), intermediate.size()), |
| options_); |
| } else { |
| // Ninja (and none) escaping can avoid the intermediate string and |
| // reprocessing of the inverse_current_dir_. |
| out << inverse_current_dir_; |
| EscapeStringToStream(out, str, options_); |
| } |
| } |
| |
| void PathOutput::WritePathStr(std::ostream& out, std::string_view str) const { |
| DCHECK(str.size() > 0 && str[0] == '/'); |
| |
| if (str.substr(0, current_dir_.value().size()) == |
| std::string_view(current_dir_.value())) { |
| // The current dir is a prefix of the output file, so we can strip the |
| // prefix and write out the result. |
| EscapeStringToStream(out, str.substr(current_dir_.value().size()), |
| options_); |
| } else if (str.size() >= 2 && str[1] == '/') { |
| WriteSourceRelativeString(out, str.substr(2)); |
| } else { |
| // Input begins with one slash, don't write the current directory since |
| // it's system-absolute. |
| #if defined(OS_WIN) |
| // On Windows, trim the leading slash, since the input for absolute |
| // paths will look like "/C:/foo/bar.txt". |
| EscapeStringToStream(out, str.substr(1), options_); |
| #else |
| EscapeStringToStream(out, str, options_); |
| #endif |
| } |
| } |