Q=$(if $(quiet),@)
non_third_party_sources = \
+ src/AtomicFile.cpp \
src/args.cpp \
src/ccache.cpp \
src/cleanup.cpp \
more_warnings="$more_warnings -Wno-shorten-64-to-32"
more_warnings="$more_warnings -Wno-sign-conversion"
more_warnings="$more_warnings -Wno-undefined-func-template"
+ more_warnings="$more_warnings -Wno-weak-vtables"
# TODO: Enable these in the future:
more_warnings="$more_warnings -Wno-old-style-cast"
built_dist_files = $(generated_sources) $(generated_docs)
non_third_party_headers = \
+ src/AtomicFile.hpp \
+ src/Error.hpp \
src/ccache.hpp \
src/common_header.hpp \
src/compopt.hpp \
--- /dev/null
+// Copyright (C) 2019 Joel Rosdahl and other contributors
+//
+// See doc/AUTHORS.adoc for a complete list of contributors.
+//
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3 of the License, or (at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+// more details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program; if not, write to the Free Software Foundation, Inc., 51
+// Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+#include "AtomicFile.hpp"
+
+#include "Error.hpp"
+#include "ccache.hpp"
+
+#include <cerrno>
+#include <fmt/core.h>
+#include <unistd.h>
+
+AtomicFile::AtomicFile(const std::string& path, Mode mode) : m_path(path)
+{
+ char* tmp_path = x_strdup(path.c_str());
+ int fd = create_tmp_fd(&tmp_path);
+ m_tmp_path = tmp_path;
+ m_stream.open(tmp_path,
+ mode == Mode::Binary ? std::ios::out | std::ios::binary
+ : std::ios::out);
+ free(tmp_path);
+ ::close(fd);
+
+ if (!m_stream) {
+ throw Error(fmt::format("failed to create {}: {}", path, strerror(errno)));
+ }
+}
+
+AtomicFile::~AtomicFile()
+{
+ if (m_stream.is_open()) {
+ // close() was not called so remove the lingering temporary file.
+ m_stream.close();
+ tmp_unlink(m_tmp_path.c_str());
+ }
+}
+
+void
+AtomicFile::write(const std::string& data)
+{
+ m_stream.write(data.data(), data.size());
+ if (!m_stream) {
+ throw Error(
+ fmt::format("failed to write data to {}: {}", m_path, strerror(errno)));
+ }
+}
+
+void
+AtomicFile::write(const std::vector<uint8_t>& data)
+{
+ m_stream.write(reinterpret_cast<const char*>(data.data()), data.size());
+ if (!m_stream) {
+ throw Error(
+ fmt::format("failed to write data to {}: {}", m_path, strerror(errno)));
+ }
+}
+
+void
+AtomicFile::close()
+{
+ m_stream.close();
+ if (x_rename(m_tmp_path.c_str(), m_path.c_str()) != 0) {
+ throw Error(fmt::format("failed to rename {} to {}", m_tmp_path, m_path));
+ }
+}
--- /dev/null
+// Copyright (C) 2019 Joel Rosdahl and other contributors
+//
+// See doc/AUTHORS.adoc for a complete list of contributors.
+//
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3 of the License, or (at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+// more details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program; if not, write to the Free Software Foundation, Inc., 51
+// Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+#pragma once
+
+#include "system.hpp"
+
+#include <fstream>
+#include <string>
+#include <vector>
+
+// This class represents a file whose data will be atomically written to a path
+// by renaming a temporary file in place.
+class AtomicFile
+{
+public:
+ enum class Mode { Binary, Text };
+
+ AtomicFile(const std::string& destination_path, Mode mode);
+ ~AtomicFile();
+
+ void write(const std::string& data);
+ void write(const std::vector<uint8_t>& data);
+
+ // Close the temporary file and rename it to the destination file. Note: The
+ // destructor will not do this automatically to avoid half-written data in the
+ // file.
+ void close();
+
+private:
+ const std::string m_path;
+ std::string m_tmp_path;
+ std::ofstream m_stream;
+};
--- /dev/null
+// Copyright (C) 2019 Joel Rosdahl and other contributors
+//
+// See doc/AUTHORS.adoc for a complete list of contributors.
+//
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3 of the License, or (at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+// more details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program; if not, write to the Free Software Foundation, Inc., 51
+// Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+#pragma once
+
+#include <stdexcept>
+
+class Error : public std::runtime_error
+{
+ using std::runtime_error::runtime_error;
+};
projects / thirdparty / ccache.git / commitdiff
