The src folder within the SVN trunk directory  contains the following sub-directories:
base - ?? source for exchndl.dll, and tinyxml source build_tools - ?? tools used within build process such as for included SVN revision number (not sure about scrooge) i18n - i18n (internationalization) support files include - header files for libcodeblocks, these headers are used by the plugins and the main application mime - mime-type files, icons and other metadata plugins - source for C::B plugins scripts - squirrel script files and associated support files sdk - cpp files for libcodeblocks, also all the bundled libs have been put here (wxscintilla, wxpropgrid, scripting) src - header and cpp files for the main executable templates - files relating to templates for different types of files and projects within C::B tools - Code for programs other than C::B
The Codeblocks executable is built from src/src, but most of the functionality is contained within libcodeblocks built from src/sdk. The reason for this appears to be the need to avoid unresolved symbols in DLL files - a good explanation for the need for this can be found at 
- All plugins go into the src/plugins folder.
- Contrib and non-core plugins go into src/plugins/contrib/
Resources for writing scripts as found in src/scripts can be found in Scripting Code::Blocks
Third party source code Folders
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