use asio without boost

This removes the last dependency to boost (except the boost test driver).

Author: ursfassler

.github/workflows/run-all.yml

@@ -22,7 +22,7 @@ jobs:
         g++ \
         gcovr \
         git \
-        libboost-system-dev \
+        libasio-dev \
         libboost-test-dev \
         libtclap-dev \
         make \

CMakeLists.txt

@@ -14,7 +14,6 @@ endif()
 project(Cucumber-Cpp)
 
 option(BUILD_SHARED_LIBS        "Generate shared libraries" OFF)
-option(CUKE_USE_STATIC_BOOST    "Statically link Boost (except boost::test)" ${WIN32})
 option(CUKE_USE_STATIC_GTEST    "Statically link Google Test" ON)
 option(CUKE_ENABLE_BOOST_TEST   "Enable Boost.Test framework" ON)
 option(CUKE_ENABLE_EXAMPLES     "Build examples" OFF)
@@ -114,55 +113,12 @@ endif()
 set(BOOST_MIN_VERSION "1.70")
 
 set(Boost_USE_STATIC_RUNTIME OFF)
-set(CUKE_CORE_BOOST_LIBS system)
 if(CUKE_ENABLE_BOOST_TEST)
     # "An external test runner utility is required to link with dynamic library" (Boost User's Guide)
-    set(Boost_USE_STATIC_LIBS OFF)
     set(CMAKE_CXX_FLAGS "-DBOOST_TEST_DYN_LINK ${CMAKE_CXX_FLAGS}")
     find_package(Boost ${BOOST_MIN_VERSION} COMPONENTS unit_test_framework)
 endif()
 
-if(CUKE_USE_STATIC_BOOST)
-    set(Boost_USE_STATIC_LIBS ON)
-    find_package(Boost ${BOOST_MIN_VERSION} COMPONENTS ${CUKE_CORE_BOOST_LIBS} REQUIRED)
-else()
-    set(CMAKE_CXX_FLAGS "-DBOOST_ALL_DYN_LINK ${CMAKE_CXX_FLAGS}")
-    set(Boost_USE_STATIC_LIBS OFF)
-    find_package(Boost ${BOOST_MIN_VERSION} COMPONENTS ${CUKE_CORE_BOOST_LIBS} REQUIRED)
-endif()
-
-# Create import targets for CMake versions older than 3.5 (actually older FindBoost.cmake)
-if(Boost_USE_STATIC_LIBS)
-    set(LIBRARY_TYPE STATIC)
-else()
-    # Just because we don't ask for static doesn't mean we're not getting static
-    set(LIBRARY_TYPE UNKNOWN)
-endif()
-if(Boost_INCLUDE_DIRS AND NOT TARGET Boost::boost)
-    add_library(Boost::boost INTERFACE IMPORTED)
-    set_target_properties(Boost::boost PROPERTIES
-        "INTERFACE_INCLUDE_DIRECTORIES" "${Boost_INCLUDE_DIRS}")
-endif()
-if(Boost_SYSTEM_LIBRARY AND NOT TARGET Boost::system)
-    add_library(Boost::system ${LIBRARY_TYPE} IMPORTED)
-    set_target_properties(Boost::system PROPERTIES
-        "IMPORTED_LOCATION" "${Boost_SYSTEM_LIBRARY}"
-        "INTERFACE_LINK_LIBRARIES" "Boost::boost"
-    )
-    if(Boost_USE_STATIC_LIBS)
-        set_target_properties(Boost::system PROPERTIES
-            "COMPILE_DEFINITIONS" BOOST_ERROR_CODE_HEADER_ONLY=1
-        )
-    endif()
-endif()
-if(Boost_UNIT_TEST_FRAMEWORK_LIBRARY AND NOT TARGET Boost::unit_test_framework)
-    add_library(Boost::unit_test_framework ${LIBRARY_TYPE} IMPORTED)
-    set_target_properties(Boost::unit_test_framework PROPERTIES
-        "IMPORTED_LOCATION" "${Boost_UNIT_TEST_FRAMEWORK_LIBRARY}"
-        "INTERFACE_LINK_LIBRARIES" "Boost::boost"
-    )
-endif()
-
 #
 # GTest
 #

README.md

@@ -22,9 +22,8 @@ It relies on a few executables:
 
 It relies on a few libraries:
 
-* [Boost](http://www.boost.org/) 1.70.
-  Required libraries: *system*.
-  Optional library for Boost Test driver: *test*.
+* [Asio](https://think-async.com/Asio/) 1.18.1 or later.
+* [Boost.Test](http://www.boost.org/) 1.70. Optional for the Boost Test driver.
 * [GTest](http://code.google.com/p/googletest/) 1.6 or later.
   Optional for the GTest driver. By default downloaded and built by CMake.
 * [GMock](http://code.google.com/p/googlemock/) 1.6 or later.

cmake/modules/FindAsio.cmake

@@ -0,0 +1,10 @@
+find_path(ASIO_INCLUDE_DIR asio.hpp)
+
+if (ASIO_INCLUDE_DIR)
+    set(ASIO_FOUND TRUE)
+else ()
+    set(ASIO_FOUND FALSE)
+endif ()
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(Asio REQUIRED_VARS ASIO_INCLUDE_DIR)

include/cucumber-cpp/internal/connectors/wire/WireServer.hpp

@@ -6,7 +6,7 @@
 
 #include <string>
 
-#include <boost/asio.hpp>
+#include <asio.hpp>
 
 namespace cucumber {
 namespace internal {
@@ -29,15 +29,14 @@ class CUCUMBER_CPP_EXPORT SocketServer {
 
 protected:
     const ProtocolHandler* protocolHandler;
-    boost::asio::io_service ios;
+    asio::io_service ios;
 
     template<typename Protocol>
     void doListen(
-        boost::asio::basic_socket_acceptor<Protocol>& acceptor,
-        const typename Protocol::endpoint& endpoint
+        asio::basic_socket_acceptor<Protocol>& acceptor, const typename Protocol::endpoint& endpoint
     );
     template<typename Protocol>
-    void doAcceptOnce(boost::asio::basic_socket_acceptor<Protocol>& acceptor);
+    void doAcceptOnce(asio::basic_socket_acceptor<Protocol>& acceptor);
     void processStream(std::iostream& stream);
 };
 
@@ -64,7 +63,7 @@ class CUCUMBER_CPP_EXPORT TCPSocketServer : public SocketServer {
     /**
      * Bind and listen to a TCP port on the given endpoint
      */
-    void listen(const boost::asio::ip::tcp::endpoint endpoint);
+    void listen(const asio::ip::tcp::endpoint endpoint);
 
     /**
      * Endpoint (IP address and port number) that this server is currently
@@ -73,15 +72,15 @@ class CUCUMBER_CPP_EXPORT TCPSocketServer : public SocketServer {
      * @throw std::system_error when not listening on any socket or
      *        the endpoint cannot be determined.
      */
-    boost::asio::ip::tcp::endpoint listenEndpoint() const;
+    asio::ip::tcp::endpoint listenEndpoint() const;
 
     void acceptOnce() override;
 
 private:
-    boost::asio::ip::tcp::acceptor acceptor;
+    asio::ip::tcp::acceptor acceptor;
 };
 
-#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
+#if defined(ASIO_HAS_LOCAL_SOCKETS)
 /**
  * Socket server that calls a protocol handler line by line
  */
@@ -103,14 +102,14 @@ class CUCUMBER_CPP_EXPORT UnixSocketServer : public SocketServer {
      * @throw std::system_error when not listening on any socket or
      *        the endpoint cannot be determined.
      */
-    boost::asio::local::stream_protocol::endpoint listenEndpoint() const;
+    asio::local::stream_protocol::endpoint listenEndpoint() const;
 
     void acceptOnce() override;
 
     ~UnixSocketServer() override;
 
 private:
-    boost::asio::local::stream_protocol::acceptor acceptor;
+    asio::local::stream_protocol::acceptor acceptor;
 };
 #endif
 

src/CMakeLists.txt

@@ -1,6 +1,7 @@
 include(GenerateExportHeader)
 
 find_package(nlohmann_json 3.10.5 REQUIRED)
+find_package(Asio REQUIRED)
 find_package(TCLAP REQUIRED)
 include(../cmake/modules/GitVersion.cmake)
 
@@ -107,8 +108,6 @@ foreach(TARGET
             $<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include>
     )
     target_link_libraries(${TARGET}
-        PUBLIC
-            Boost::boost
         PRIVATE
             ${CUKE_EXTRA_PRIVATE_LIBRARIES}
     )

src/connectors/wire/WireServer.cpp

@@ -4,20 +4,14 @@
 namespace cucumber {
 namespace internal {
 
-using namespace boost::asio;
-using namespace boost::asio::ip;
-#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
-using namespace boost::asio::local;
-#endif
-
 SocketServer::SocketServer(const ProtocolHandler* protocolHandler) :
     protocolHandler(protocolHandler),
     ios() {
 }
 
 template<typename Protocol>
 void SocketServer::doListen(
-    basic_socket_acceptor<Protocol>& acceptor, const typename Protocol::endpoint& endpoint
+    asio::basic_socket_acceptor<Protocol>& acceptor, const typename Protocol::endpoint& endpoint
 ) {
     if (acceptor.is_open())
         throw std::system_error(asio::error::already_open);
@@ -28,7 +22,7 @@ void SocketServer::doListen(
 }
 
 template<typename Protocol>
-void SocketServer::doAcceptOnce(basic_socket_acceptor<Protocol>& acceptor) {
+void SocketServer::doAcceptOnce(asio::basic_socket_acceptor<Protocol>& acceptor) {
     typename Protocol::iostream stream;
     acceptor.accept(*stream.rdbuf());
     processStream(stream);
@@ -47,23 +41,23 @@ TCPSocketServer::TCPSocketServer(const ProtocolHandler* protocolHandler) :
 }
 
 void TCPSocketServer::listen(const port_type port) {
-    listen(tcp::endpoint(tcp::v4(), port));
+    listen(asio::ip::tcp::endpoint(asio::ip::tcp::v4(), port));
 }
 
-void TCPSocketServer::listen(const tcp::endpoint endpoint) {
+void TCPSocketServer::listen(const asio::ip::tcp::endpoint endpoint) {
     doListen(acceptor, endpoint);
-    acceptor.set_option(tcp::no_delay(true));
+    acceptor.set_option(asio::ip::tcp::no_delay(true));
 }
 
-tcp::endpoint TCPSocketServer::listenEndpoint() const {
+asio::ip::tcp::endpoint TCPSocketServer::listenEndpoint() const {
     return acceptor.local_endpoint();
 }
 
 void TCPSocketServer::acceptOnce() {
     doAcceptOnce(acceptor);
 }
 
-#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
+#if defined(ASIO_HAS_LOCAL_SOCKETS)
 UnixSocketServer::UnixSocketServer(const ProtocolHandler* protocolHandler) :
     SocketServer(protocolHandler),
     acceptor(ios) {
@@ -73,10 +67,10 @@ void UnixSocketServer::listen(const std::string& unixPath) {
     if (std::filesystem::status(unixPath).type() == std::filesystem::file_type::socket)
         std::filesystem::remove(unixPath);
 
-    doListen(acceptor, stream_protocol::endpoint(unixPath));
+    doListen(acceptor, asio::local::stream_protocol::endpoint(unixPath));
 }
 
-stream_protocol::endpoint UnixSocketServer::listenEndpoint() const {
+asio::local::stream_protocol::endpoint UnixSocketServer::listenEndpoint() const {
     return acceptor.local_endpoint();
 }
 

src/main.cpp

@@ -16,7 +16,7 @@ void acceptWireProtocol(
     JsonWireMessageCodec wireCodec;
     WireProtocolHandler protocolHandler(wireCodec, cukeEngine);
     std::unique_ptr<SocketServer> server;
-#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
+#if defined(ASIO_HAS_LOCAL_SOCKETS)
     if (!unixPath.empty()) {
         UnixSocketServer* const unixServer = new UnixSocketServer(&protocolHandler);
         server.reset(unixServer);
@@ -31,9 +31,7 @@ void acceptWireProtocol(
     {
         TCPSocketServer* const tcpServer = new TCPSocketServer(&protocolHandler);
         server.reset(tcpServer);
-        tcpServer->listen(
-            boost::asio::ip::tcp::endpoint(boost::asio::ip::address::from_string(host), port)
-        );
+        tcpServer->listen(asio::ip::tcp::endpoint(asio::ip::address::from_string(host), port));
         if (verbose)
             std::clog << "Listening on " << tcpServer->listenEndpoint() << std::endl;
     }
@@ -60,7 +58,7 @@ int CUCUMBER_CPP_EXPORT main(int argc, char** argv) {
     );
     cmd.add(portArg);
 
-#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
+#if defined(ASIO_HAS_LOCAL_SOCKETS)
     TCLAP::ValueArg<std::string> unixArg(
         "u",
         "unix",
@@ -77,7 +75,7 @@ int CUCUMBER_CPP_EXPORT main(int argc, char** argv) {
     std::string unixPath;
     std::string listenHost = listenArg.getValue();
     int port = portArg.getValue();
-#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
+#if defined(ASIO_HAS_LOCAL_SOCKETS)
     unixPath = unixArg.getValue();
 #endif
 

tests/integration/WireServerTest.cpp

@@ -12,10 +12,6 @@
 #include <sstream>
 
 using namespace cucumber::internal;
-using namespace boost::asio::ip;
-#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
-using namespace boost::asio::local;
-#endif
 using namespace testing;
 
 static const auto THREAD_TEST_TIMEOUT = std::chrono::milliseconds(4000);
@@ -94,7 +90,7 @@ class TCPSocketServerTest : public SocketServerTest {
 
 TEST_F(TCPSocketServerTest, exitsOnFirstConnectionClosed) {
     // given
-    tcp::iostream client(server->listenEndpoint());
+    asio::ip::tcp::iostream client(server->listenEndpoint());
     ASSERT_THAT(client, IsConnected());
     ASSERT_THAT(server->listenEndpoint().address().to_string(), std::string("0.0.0.0"));
 
@@ -107,11 +103,11 @@ TEST_F(TCPSocketServerTest, exitsOnFirstConnectionClosed) {
 
 TEST_F(TCPSocketServerTest, moreThanOneClientCanConnect) {
     // given
-    tcp::iostream client1(server->listenEndpoint());
+    asio::ip::tcp::iostream client1(server->listenEndpoint());
     ASSERT_THAT(client1, IsConnected());
 
     // when
-    tcp::iostream client2(server->listenEndpoint());
+    asio::ip::tcp::iostream client2(server->listenEndpoint());
 
     // then
     ASSERT_THAT(client2, IsConnected());
@@ -126,7 +122,7 @@ TEST_F(TCPSocketServerTest, receiveAndSendsSingleLineMassages) {
     }
 
     // given
-    tcp::iostream client(server->listenEndpoint());
+    asio::ip::tcp::iostream client(server->listenEndpoint());
     ASSERT_THAT(client, IsConnected());
 
     // when
@@ -145,7 +141,7 @@ class TCPSocketServerLocalhostTest : public SocketServerTest {
 
     SocketServer* createListeningServer() override {
         server.reset(new TCPSocketServer(&protocolHandler));
-        server->listen(tcp::endpoint(boost::asio::ip::address::from_string("127.0.0.1"), 0));
+        server->listen(asio::ip::tcp::endpoint(asio::ip::address::from_string("127.0.0.1"), 0));
         return server.get();
     }
 
@@ -156,7 +152,7 @@ class TCPSocketServerLocalhostTest : public SocketServerTest {
 
 TEST_F(TCPSocketServerLocalhostTest, listensOnLocalhost) {
     // given
-    tcp::iostream client(server->listenEndpoint());
+    asio::ip::tcp::iostream client(server->listenEndpoint());
     ASSERT_THAT(client, IsConnected());
     ASSERT_THAT(server->listenEndpoint().address().to_string(), std::string("127.0.0.1"));
 
@@ -167,7 +163,7 @@ TEST_F(TCPSocketServerLocalhostTest, listensOnLocalhost) {
     EXPECT_THAT(serverThread, EventuallyTerminates());
 }
 
-#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
+#if defined(ASIO_HAS_LOCAL_SOCKETS)
 class UnixSocketServerTest : public SocketServerTest {
 protected:
     std::unique_ptr<UnixSocketServer> server;
@@ -204,14 +200,14 @@ class UnixSocketServerTest : public SocketServerTest {
  * created at startup and removed on shutdown.
  */
 TEST_F(UnixSocketServerTest, fullLifecycle) {
-    stream_protocol::endpoint socketName = server->listenEndpoint();
+    asio::local::stream_protocol::endpoint socketName = server->listenEndpoint();
     EXPECT_CALL(protocolHandler, handle("X")).WillRepeatedly(Return("Y"));
 
     // socket created at startup
     ASSERT_TRUE(std::filesystem::exists(socketName.path()));
 
     // traffic flows
-    stream_protocol::iostream client(socketName);
+    asio::local::stream_protocol::iostream client(socketName);
     client << "X" << std::endl << std::flush;
     EXPECT_THAT(client, EventuallyReceives("Y"));