Implemented XDG-compliant config file reading.

[stg.git] / projects / sgconf / main.cpp

diff --git a/projects/sgconf/main.cpp b/projects/sgconf/main.cpp
index a1c8df8f0fb8f85ab3dc26d7a0851db7ee416e00..a39f57cee6b7887b3b995101109c67823553018d 100644 (file)
--- a/projects/sgconf/main.cpp
+++ b/projects/sgconf/main.cpp
@@ -146,6 +146,28 @@ void UsageCorporations(bool full);
 
 void Version();
 
+void ReadUserConfigFile(SGCONF::OPTION_BLOCK & block)
+{
+std::vector<std::string> paths;
+const char * configHome = getenv("XDG_CONFIG_HOME");
+if (configHome == NULL)
+    {
+    const char * home = getenv("HOME");
+    if (home == NULL)
+        return;
+    paths.push_back(std::string(home) + "/.config/sgconf/sgconf.conf");
+    paths.push_back(std::string(home) + "/.sgconf/sgconf.conf");
+    }
+else
+    paths.push_back(std::string(configHome) + "/sgconf/sgconf.conf");
+for (std::vector<std::string>::const_iterator it = paths.begin(); it != paths.end(); ++it)
+    if (access(it->c_str(), R_OK) == 0)
+        {
+        block.ParseFile(*it);
+        return;
+        }
+}
+
 } // namespace anonymous
 
 namespace SGCONF
@@ -178,6 +200,10 @@ class CONFIG_ACTION : public ACTION
 
 PARSER_STATE CONFIG_ACTION::Parse(int argc, char ** argv)
 {
+if (argc == 0 ||
+    argv == NULL ||
+    *argv == NULL)
+    throw ERROR("Missing argument.");
 char * pos = strchr(*argv, '@');
 if (pos != NULL)
     {
@@ -1207,14 +1233,25 @@ blocks.Add("General options")
       .Add("h", "help", SGCONF::MakeFunc0Action(bind0(Method1Adapt(&SGCONF::OPTION_BLOCKS::Help, blocks), 0)), "\t\tshow this help and exit")
       .Add("help-all", SGCONF::MakeFunc0Action(UsageAll), "\t\tshow full help and exit")
       .Add("v", "version", SGCONF::MakeFunc0Action(Version), "\t\tshow version information and exit");
-blocks.Add("Connection options")
+SGCONF::OPTION_BLOCK & block = blocks.Add("Connection options")
       .Add("s", "server", SGCONF::MakeParamAction(config.server, std::string("localhost"), "<address>"), "\t\thost to connect")
       .Add("p", "port", SGCONF::MakeParamAction(config.port, uint16_t(5555), "<port>"), "\t\tport to connect")
       .Add("u", "username", SGCONF::MakeParamAction(config.userName, std::string("admin"), "<username>"), "\tadministrative login")
       .Add("w", "userpass", SGCONF::MakeParamAction(config.userPass, "<password>"), "\tpassword for the administrative login")
       .Add("a", "address", SGCONF::MakeParamAction(config, "<connection string>"), "connection params as a single string in format: <login>:<password>@<host>:<port>");
 
-SGCONF::PARSER_STATE state(blocks.Parse(--argc, ++argv)); // Skipping self name
+
+SGCONF::PARSER_STATE state(false, argc, argv);
+
+try
+{
+state = blocks.Parse(--argc, ++argv); // Skipping self name
+}
+catch (const SGCONF::OPTION::ERROR& ex)
+{
+std::cerr << ex.what() << "\n";
+return -1;
+}
 
 if (state.stop)
     return 0;
@@ -1225,6 +1262,32 @@ if (state.argc > 0)
     return -1;
     }
 
+try
+{
+SGCONF::CONFIG configOverride(config);
+
+if (config.configFile.empty())
+    {
+    const char * mainConfigFile = "/etc/sgconf/sgconf.conf";
+    if (access(mainConfigFile, R_OK) == 0)
+        block.ParseFile(mainConfigFile);
+    ReadUserConfigFile(block);
+    }
+else
+    {
+    block.ParseFile(config.configFile.data());
+    }
+
+config = configOverride;
+}
+catch (const SGCONF::OPTION::ERROR& ex)
+{
+std::cerr << ex.what() << "\n";
+return -1;
+}
+
+std::cerr << "Config: " << config.Serialize() << std::endl;
+
 return 0;
 
 if (argc < 2)