Add readline support for the "repl" command

fixes #8091

CMakeLists.txt

@@ -152,6 +152,7 @@ check_function_exists(pipe2 HAVE_PIPE2)
 check_function_exists(nice HAVE_NICE)
 check_library_exists(dl dladdr "dlfcn.h" HAVE_DLADDR)
 check_library_exists(execinfo backtrace_symbols "" HAVE_LIBEXECINFO)
+check_library_exists(readline readline "" HAVE_LIBREADLINE)
 check_include_file_cxx(cxxabi.h HAVE_CXXABI_H)
 
 if(HAVE_LIBEXECINFO)

config.h.cmake

@@ -9,6 +9,7 @@
 #cmakedefine HAVE_LIBEXECINFO
 #cmakedefine HAVE_CXXABI_H
 #cmakedefine HAVE_NICE
+#cmakedefine HAVE_LIBREADLINE
 
 #cmakedefine ICINGA2_UNITY_BUILD
 

debian/control

@@ -20,6 +20,7 @@ Build-Depends: bison,
                libpq-dev,
                libssl-dev,
                libyajl-dev,
+               libreadline-dev,
                make (>= 3.81),
                po-debconf
 Standards-Version: 3.9.5

icinga2.spec

@@ -98,6 +98,12 @@ BuildRequires: flex >= 2.5.35
 BuildRequires: bison
 BuildRequires: make
 
+%if "%{_vendor}" == "suse"
+BuildRequires: libreadline-devel
+%else
+BuildRequires: readline-devel
+%endif
+
 %if "%{_vendor}" == "redhat" && (0%{?el5} || 0%{?rhel} == 5 || "%{?dist}" == ".el5")
 # el5 requires packages.icinga.org
 BuildRequires: boost153-devel

lib/base/console.cpp

@@ -28,13 +28,17 @@ INITIALIZE_ONCE(&Console::DetectType);
 static ConsoleType l_ConsoleType = Console_Dumb;
 
 ConsoleColorTag::ConsoleColorTag(int color)
-	: m_Color(color)
+	: m_Color(color), m_ConsoleType(-1)
+{ }
+
+ConsoleColorTag::ConsoleColorTag(int color, ConsoleType consoleType)
+	: m_Color(color), m_ConsoleType(consoleType)
 { }
 
 std::ostream& icinga::operator<<(std::ostream& fp, const ConsoleColorTag& cct)
 {
 #ifndef _WIN32
-	if (Console::GetType(fp) == Console_VT100)
+	if (cct.m_ConsoleType == Console_VT100 || Console::GetType(fp) == Console_VT100)
 		Console::PrintVT100ColorCode(fp, cct.m_Color);
 #else /* _WIN32 */
 	if (Console::GetType(fp) == Console_Windows) {

lib/base/console.hpp

@@ -68,11 +68,13 @@ class I2_BASE_API ConsoleColorTag
 {
 public:
 	ConsoleColorTag(int color);
+	ConsoleColorTag(int color, ConsoleType consoleType);
 
 	friend I2_BASE_API std::ostream& operator<<(std::ostream& fp, const ConsoleColorTag& cct);
 
 private:
 	int m_Color;
+	int m_ConsoleType;
 };
 
 I2_BASE_API std::ostream& operator<<(std::ostream& fp, const ConsoleColorTag& cct);

lib/cli/CMakeLists.txt

@@ -35,7 +35,7 @@ endif()
 
 add_library(cli SHARED ${cli_SOURCES})
 
-target_link_libraries(cli ${Boost_LIBRARIES} base config remote)
+target_link_libraries(cli ${Boost_LIBRARIES} readline base config remote)
 
 set_target_properties (
   cli PROPERTIES

lib/cli/replcommand.cpp

@@ -25,6 +25,13 @@
 #include "base/application.hpp"
 #include <iostream>
 
+#ifdef HAVE_LIBREADLINE
+extern "C" {
+#include <readline/readline.h>
+#include <readline/history.h>
+}
+#endif /* HAVE_LIBREADLINE */
+
 using namespace icinga;
 namespace po = boost::program_options;
 
@@ -72,12 +79,41 @@ int ReplCommand::Run(const po::variables_map& vm, const std::vector<std::string>
 		String fileName = "<" + Convert::ToString(next_line) + ">";
 		next_line++;
 
-		std::cout << ConsoleColorTag(Console_ForegroundCyan)
-		    << fileName << ConsoleColorTag(Console_ForegroundRed) << " => "
-		    << ConsoleColorTag(Console_Normal);
+#ifdef HAVE_LIBREADLINE
+		ConsoleType type = Console::GetType(std::cout);
 
+		std::stringstream prompt_sbuf;
+
+		prompt_sbuf << RL_PROMPT_START_IGNORE << ConsoleColorTag(Console_ForegroundCyan, type)
+		    << RL_PROMPT_END_IGNORE << fileName
+		    << RL_PROMPT_START_IGNORE << ConsoleColorTag(Console_ForegroundRed, type)
+		    << RL_PROMPT_END_IGNORE << " => "
+		    << RL_PROMPT_START_IGNORE << ConsoleColorTag(Console_Normal, type);
+#else /* HAVE_LIBREADLINE */
+		std::cout << ConsoleColorTag(Console_ForegroundCyan)
+		    << fileName
+		    << ConsoleColorTag(Console_ForegroundRed)
+		    << " => "
+		    << ConsoleColorTag(Console_Normal);
+#endif /* HAVE_LIBREADLINE */
+
+#ifdef HAVE_LIBREADLINE
+		String prompt = prompt_sbuf.str();
+
+		char *rline = readline(prompt.CStr());
+
+		if (!rline)
+			break;
+
+		if (*rline)
+			add_history(rline);
+
+		String line = rline;
+		free(rline);
+#else /* HAVE_LIBREADLINE */
 		std::string line;
 		std::getline(std::cin, line);
+#endif /* HAVE_LIBREADLINE */
 
 		Expression *expr;