GITHUB_PLUGIN now builds under the scripting DSO on linux.

Enhance IO_MGR::GuessPluginTypeFromLibPath() to support the GITHUB plugin.
Build boost with -fPIC on Linux unconditionally, in preparation for
DLL/DSO build of kicad.
Add python script to test back to back reads of GITHUB plugin.

CMakeLists.txt

@@ -134,9 +134,12 @@ if( CMAKE_COMPILER_IS_GNUCXX )
     else()
         # We build DLL/DSOs from static libraries, so create position independent code
         # for all cases, since we do not have DLL/DSO specific static libraries.
-        # This flag could be localized to any object file going into a DLL/DSO in the future.
-        set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC" )
-        set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC" )
+        # Subdirectories via add_subdirectores() reference this variable, and it is either set or empty,
+        # empty for Windows.
+        set( PIC_FLAG -fPIC )
+
+        set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${PIC_FLAG}" )
+        set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${PIC_FLAG}" )
 
         # Thou shalt not link vaporware and tell us it's a valid DSO:
         set( CMAKE_SHARED_LINKER_FLAGS "-Wl,--no-undefined" )

CMakeModules/download_boost.cmake

@@ -97,8 +97,11 @@ if( BUILD_GITHUB_PLUGIN )
 
     if( MINGW )
         set( bootstrap "bootstart.bat mingw" )
+        unset( PIC_STUFF )
     else()
         set( bootstrap bootstrap.sh )
+        # pass to *both* C and C++ compilers
+        set( PIC_STUFF "cflags=${PIC_FLAG}" )
     endif()
 
     ExternalProject_Add( boost
@@ -116,13 +119,14 @@ if( BUILD_GITHUB_PLUGIN )
         UPDATE_COMMAND  ${CMAKE_COMMAND} -E remove_directory "${BOOST_ROOT}"
 
         BINARY_DIR      "${PREFIX}/src/boost/"
-        CONFIGURE_COMMAND ${bootstrap}
+        CONFIGURE_COMMAND ./${bootstrap}
                         --with-libraries=${libs_csv}
 
-        BUILD_COMMAND   b2
+        BUILD_COMMAND   ./b2
                         variant=release
                         threading=multi
                         toolset=gcc
+                        ${PIC_STUFF}
                         #link=static
                         --prefix=<INSTALL_DIR>
                         install

pcbnew/CMakeLists.txt

@@ -322,8 +322,13 @@ endif()
 # _pcbnew DLL/DSO file creation
 ###
 
+unset( GITHUB_PLUGIN_LIBRARIES )
+if( BUILD_GITHUB_PLUGIN )
+    set( GITHUB_PLUGIN_LIBRARIES github_plugin )
+endif()
+
 if( ( KICAD_SCRIPTING OR KICAD_SCRIPTING_MODULES ) AND NOT WIN32 AND NOT APPLE )
-    set ( PCBNEW_EXTRA_LIBS "rt" )
+    list( APPEND PCBNEW_EXTRA_LIBS rt )
 endif()
 
 
@@ -339,6 +344,7 @@ if( KICAD_SCRIPTING_MODULES )
         pcbcommon
         common
         pcad2kicadpcb
+        ${GITHUB_PLUGIN_LIBRARIES}
         polygon
         bitmaps
         ${wxWidgets_LIBRARIES}

pcbnew/io_mgr.cpp

@@ -23,6 +23,7 @@
  */
 
 #include <wx/filename.h>
+#include <wx/uri.h>
 
 #include <io_mgr.h>
 #include <legacy_plugin.h>
@@ -183,8 +184,8 @@ const wxString IO_MGR::GetFileExtension( PCB_FILE_T aFileType )
 
 IO_MGR::PCB_FILE_T IO_MGR::GuessPluginTypeFromLibPath( const wxString& aLibPath )
 {
-    wxFileName  fn = aLibPath;
-    PCB_FILE_T  ret;
+    PCB_FILE_T  ret = KICAD;        // default guess, unless detected otherwise.
+    wxFileName  fn( aLibPath );
 
     if( fn.GetExt() == LegacyFootprintLibPathExtension )
     {
@@ -199,17 +200,26 @@ IO_MGR::PCB_FILE_T IO_MGR::GuessPluginTypeFromLibPath( const wxString& aLibPath
         ret = EAGLE;
     }
 
-#if defined(BUILD_GITHUB_PLUGIN)
-    // There is no extension for a remote repo.  We're thinking about this.
-#endif
-
-    else
+    // Test this one anyways, even thought its the default guess, to avoid
+    // the wxURI instantiation below.
+    // We default ret to KICAD above, because somebody might have
+    // mistakenly put a pretty library into a directory other than
+    // *.pretty/ with *.kicad_mod in there., and I don't want to return -1,
+    // since we only claimed to be guessing.
+    else if( fn.GetExt() == KiCadFootprintLibPathExtension )
     {
-        // Although KICAD PLUGIN uses libpaths with fixed extension of
-        // KiCadFootprintLibPathExtension, we don't make that assumption since
-        // a default choice is needed.
         ret = KICAD;
     }
+    else
+    {
+        // There is no extension for a remote repo, so test the server name.
+        wxURI   uri( aLibPath );
+
+        if( uri.HasServer() && uri.GetServer() == wxT( "github.com" ) )
+        {
+            ret = GITHUB;
+        }
+    }
 
     return ret;
 }

scripts/test_plugin.py

+#!/usr/bin/python
+
+# Convert a footprint library from one format to another, e.g. legacy to pretty.
+
+# 1) Build target _pcbnew after enabling scripting in cmake.
+# $ make _pcbnew
+
+# 2) Changed dir to pcbnew
+# $ cd pcbnew
+# $ pwd
+# build/pcbnew
+
+# 3) Entered following command line, script takes to arguments: library_path [footprint_name]
+# $ PYTHONPATH=. <path_to>/test_plugin.py https://github.com/liftoff-sr/pretty_footprints   [100-LQFP]
+
+
+from __future__ import print_function
+from pcbnew import *
+import sys
+
+if len( sys.argv ) < 2 :
+    print( "usage: script <library_path>  [<footprint_name>]" )
+    sys.exit(1)
+
+
+src_libpath = sys.argv[1]
+
+
+src_type = IO_MGR.GuessPluginTypeFromLibPath( src_libpath );
+
+src_plugin = IO_MGR.PluginFind( src_type )
+
+if len( sys.argv ) == 2:
+    list_of_footprints = src_plugin.FootprintEnumerate( src_libpath )
+    for fp in list_of_footprints:
+        print( fp )
+
+elif len( sys.argv ) == 3:
+    # I had some concerns about back to back reads, this verifies it is no problem:
+    module = src_plugin.FootprintLoad( src_libpath, sys.argv[2] )
+    if not module:
+        print( "1st try: module", sys.argv[2], "not found" )
+    module = src_plugin.FootprintLoad( src_libpath, sys.argv[2] )
+    if not module:
+        print( "2nd try: module", sys.argv[2], "not found" )
+    print( module )
+
+