Add support for Windows to load from ~/.Wuild/Wuild.ini by default and update the docs.

Author: mapron

README.md

@@ -169,6 +169,20 @@ listenPort=7767              ; exact same as [toolServer] coordinatorPort. make
 ```
 Now you can stop WuildCoordinator and WuildToolServer on the client, and run both on the server (192.168.0.2) machine. Now you will have build distributed between two hosts.
 
+# Configuration: commandline and config file
+For every option in ini file, you can also provide its value form the commandline; you need to add ```--wuild-``` prefix to it, for example:  
+```
+WuildNinja --wuild-logLevel=7 --wuild-coordinatorHost=testhost
+```  
+Any commandline option has higher priority that ini option. However, keep in mind, that all commandline variable placed in 'global' scope, so you can't provide different 'listenPort' for different scopes.  
+  
+Let's now talk about ini config file location. It tries to load these locations in order:  
+- ```--wuild-config=/path/file.ini``` command line parameter (and stops with error if path provided but invalid);
+- ```WUILD_CONFIG=/path/file.ini``` environment variable (and stops with error if path provided but invalid);
+- ```~/.Wuild/Wuild.ini``` (for Windows ~ is %USERPROFILE%);
+- (Windows only) ```~/Wuild.ini```;
+- Final attempt, it will try to load ```Wuild.ini``` in the same directory with main executable (e.g. WuildNinja).  
+If first two was not set and search is ended, then Wuild is set to "unconfigured mode". For WuildNinja it means it will fallback to plain ninja.
 
 # Advanced usage
 After Quick Start, next step is to add more ToolServers and maybe Coordinators (so you can safely shutown one server without disabling all builds on CI).  

src/ConfiguredApplication/ConfiguredApplication.cpp

@@ -27,15 +27,9 @@
 #include <memory>
 
 namespace {
-const std::string g_defaultConfigSubfolder =
-#ifndef _WIN32
-    ".Wuild/"
-#else
-    ""
-#endif
-    ;
-const std::string g_defaultConfig = "Wuild.ini";
-const std::string g_envConfig     = "WUILD_CONFIG";
+const std::string g_defaultConfigSubfolder = ".Wuild/";
+const std::string g_defaultConfig          = "Wuild.ini";
+const std::string g_envConfig              = "WUILD_CONFIG";
 }
 
 namespace Wuild {
@@ -62,6 +56,9 @@ ConfiguredApplication::ConfiguredApplication(const StringVector& argConfig, cons
         unexistendConfigIsError = false;
         const std::vector<std::string> configPaths{
             Application::Instance().GetHomeDir() + "/" + g_defaultConfigSubfolder + g_defaultConfig,
+#ifdef _WIN32
+            Application::Instance().GetHomeDir() + "/" + g_defaultConfig,
+#endif
             Application::Instance().GetExecutablePath() + g_defaultConfig,
         };
         for (const auto& path : configPaths)
@@ -70,6 +67,7 @@ ConfiguredApplication::ConfiguredApplication(const StringVector& argConfig, cons
                 break;
             }
     }
+
     if (!config.ReadIniFile(configPath) && unexistendConfigIsError) {
         Syslogger(Syslogger::Err) << "Failed to load:" << configPath;
     }
@@ -85,6 +83,8 @@ ConfiguredApplication::ConfiguredApplication(const StringVector& argConfig, cons
 
     InitLogging(m_loggerConfig);
 
+    Syslogger() << "Using Wuild config = " << configPath;
+
     m_tempDir = m_config->GetString(m_defaultGroupName, "tempDir", Application::Instance().GetTempDir());
 }