Set PYTHONPATH internally for macOS run from build dir

cmake/config.h.cmake

@@ -83,6 +83,8 @@
 /// Allows scripts install directory to be referenced by the program code.
 #define PYTHON_DEST                     "@PYTHON_DEST@"
 
+#define PYTHON_SITE_PACKAGE_PATH        "@PYTHON_SITE_PACKAGE_PATH@"
+
 /// Allows scripts install directory to be referenced by the program code.
 #define KICAD_DATA                      "@KICAD_DATA@"
 

scripting/python_scripting.cpp

@@ -281,6 +281,13 @@ bool SCRIPTING::scriptingSetup()
         pypath = wxString( wxGetenv( wxT( "PYTHONPATH" ) ) ) + wxT( ":" ) + pypath;
     }
 
+    // Hack for run from build dir option
+    if( wxGetEnv( wxT( "KICAD_RUN_FROM_BUILD_DIR" ), nullptr ) )
+    {
+        pypath = wxString( wxT( PYTHON_SITE_PACKAGE_PATH ) ) + wxT( "/../:" )
+                 + wxT( PYTHON_SITE_PACKAGE_PATH ) + wxT( ":" ) + wxT( PYTHON_DEST );
+    }
+
     // set $PYTHONPATH
     wxSetEnv( wxT( "PYTHONPATH" ), pypath );