eeschema: allow exporting netlists through UI-less KIFACE API function

eeschema/eeschema.cpp

@@ -44,6 +44,11 @@
 #include <settings/settings_manager.h>
 #include <sexpr/sexpr.h>
 #include <sexpr/sexpr_parser.h>
+#include <kiface_ids.h>
+#include <netlist_exporters/netlist_exporter_kicad.h>
+
+#include <schematic.h>
+#include <connection_graph.h>
 
 // The main sheet of the project
 SCH_SHEET*  g_RootSheet = NULL;
@@ -54,6 +59,59 @@ TRANSFORM DefaultTransform = TRANSFORM( 1, 0, 0, -1 );
 
 namespace SCH {
 
+
+static std::unique_ptr<SCHEMATIC> readSchematicFromFile( const std::string& aFilename )
+{
+    auto pi = SCH_IO_MGR::FindPlugin( SCH_IO_MGR::SCH_KICAD );
+    std::unique_ptr<SCHEMATIC> schematic( new SCHEMATIC ( nullptr ) );
+
+    auto &manager = Pgm().GetSettingsManager();
+
+    manager.LoadProject( "" );
+    schematic->Reset();
+    schematic->SetProject( &manager.Prj() );
+    schematic->SetRoot( pi->Load( aFilename, schematic.get() ) );
+    schematic->CurrentSheet().push_back( &schematic->Root() );
+
+    SCH_SCREENS screens( schematic->Root() );
+
+    for( SCH_SCREEN* screen = screens.GetFirst(); screen; screen = screens.GetNext() )
+        screen->UpdateLocalLibSymbolLinks();
+
+    SCH_SHEET_LIST sheets = schematic->GetSheets();
+
+    // Restore all of the loaded symbol instances from the root sheet screen.
+    sheets.UpdateSymbolInstances( schematic->RootScreen()->GetSymbolInstances() );
+
+    sheets.AnnotatePowerSymbols();
+
+    // NOTE: This is required for multi-unit symbols to be correct
+    // Normally called from SCH_EDIT_FRAME::FixupJunctions() but could be refactored
+    for( SCH_SHEET_PATH& sheet : sheets )
+        sheet.UpdateAllScreenReferences();
+
+    // NOTE: SchematicCleanUp is not called; QA schematics must already be clean or else
+    // SchematicCleanUp must be freed from its UI dependencies.
+
+    schematic->ConnectionGraph()->Recalculate( sheets, true );
+
+    return schematic;
+}
+
+
+bool generateSchematicNetlist( const wxString& aFilename, wxString& aNetlist )
+{
+    std::unique_ptr<SCHEMATIC> schematic ( readSchematicFromFile( (const char*) aFilename ) );
+    NETLIST_EXPORTER_KICAD exporter( schematic.get() );
+    STRING_FORMATTER formatter;
+
+    exporter.Format( &formatter, GNL_ALL | GNL_OPT_KICAD );
+    aNetlist = formatter.GetString();
+
+    return true;
+}
+
+
 static struct IFACE : public KIFACE_I
 {
     // Of course all are virtual overloads, implementations of the KIFACE.
@@ -123,6 +181,11 @@ static struct IFACE : public KIFACE_I
      */
     void* IfaceOrAddress( int aDataId ) override
     {
+        switch( aDataId )
+        {
+            case KIFACE_NETLIST_SCHEMATIC:
+                return (void*) generateSchematicNetlist;
+        }
         return NULL;
     }
 

include/kiface_ids.h

@@ -50,7 +50,12 @@ enum KIFACE_ADDR_ID : int
      * Type is FP_LIB_TABLE*
      * Caller does NOT own.
      */
-     KIFACE_GLOBAL_FOOTPRINT_TABLE
+     KIFACE_GLOBAL_FOOTPRINT_TABLE,
+
+     KIFACE_NEW_DRC_ENGINE,
+     KIFACE_LOAD_PCB,
+     KIFACE_LOAD_SCHEMATIC,
+     KIFACE_NETLIST_SCHEMATIC
 };
 
 #endif // KIFACE_IDS