[FEATURE] Add --code arg to run python code on qgis load

Author: NathanW2

src/app/main.cpp

@@ -35,6 +35,7 @@
 #include "qgscustomization.h"
 #include "qgspluginregistry.h"
 #include "qgsmessagelog.h"
+#include "qgspythonrunner.h"
 
 #include <cstdio>
 #include <stdio.h>
@@ -106,6 +107,7 @@ void usage( std::string const & appName )
             << "\t[--nocustomization]\tdon't apply GUI customization\n"
             << "\t[--optionspath path]\tuse the given QSettings path\n"
             << "\t[--configpath path]\tuse the given path for all user configuration\n"
+            << "\t[--code path]\tRun the given python file on load. \n"
             << "\t[--help]\t\tthis text\n\n"
             << "  FILES:\n"
             << "    Files specified on the command line can include rasters,\n"
@@ -266,6 +268,8 @@ int main( int argc, char *argv[] )
   QString configpath;
   QString optionpath;
 
+  QString pythonfile;
+
 #if defined(ANDROID)
   QgsDebugMsg( QString( "Android: All params stripped" ) );// Param %1" ).arg( argv[0] ) );
   //put all QGIS settings in the same place
@@ -325,6 +329,10 @@ int main( int argc, char *argv[] )
     {
       configpath = argv[++i];
     }
+    else if ( i + 1 < argc && ( arg == "--code" || arg == "-f" ) )
+    {
+      pythonfile = argv[++i];
+    }
     else
     {
       myFileList.append( QDir::convertSeparators( QFileInfo( QFile::decodeName( argv[i] ) ).absoluteFilePath() ) );
@@ -358,6 +366,7 @@ int main( int argc, char *argv[] )
         {"extent",   required_argument, 0, 'e'},
         {"optionspath", required_argument, 0, 'o'},
         {"configpath", required_argument, 0, 'c'},
+        {"code", required_argument, 0, 'f'},
         {"android", required_argument, 0, 'a'},
         {0, 0, 0, 0}
       };
@@ -428,6 +437,10 @@ int main( int argc, char *argv[] )
           configpath = optarg;
           break;
 
+        case 'f':
+          pythonfile = optarg;
+          break;
+
         case '?':
           usage( argv[0] );
           return 2;   // XXX need standard exit codes
@@ -769,7 +782,16 @@ int main( int argc, char *argv[] )
     }
   }
 
-  /////////////////////////////////////////////////////////////////////
+  if ( !pythonfile.isEmpty() )
+  {
+#ifdef Q_WS_WIN
+    //replace backslashes with forward slashes
+    pythonfile.replace( "\\", "/" );
+#endif
+    QgsPythonRunner::run(QString("execfile('%1')").arg(pythonfile));    
+  }
+
+  /////////////////////////////////`////////////////////////////////////
   // Take a snapshot of the map view then exit if snapshot mode requested
   /////////////////////////////////////////////////////////////////////
   if ( mySnapshotFileName != "" )
@@ -797,7 +819,6 @@ int main( int argc, char *argv[] )
     return 1;
   }
 
-
   /////////////////////////////////////////////////////////////////////
   // Continue on to interactive gui...
   /////////////////////////////////////////////////////////////////////