Add App and Cmd as generic base classes for multi-command
applications. The code is taken from jw-python: The exising
jw.pkg.App is very similar to the more capable jwutils.Cmds class,
so, to avoid code duplication, add it here to allow for jwutils.Cmds
and jw.pkg.App to derive from it at some point in the future.
Both had to be slightly modified to work within jw-pkg's less
equipped context, and will need futher code cleanup.
Signed-off-by: Jan Lindemann <jan@janware.com>
Types is a container for types, notably classes, which are
dynamically loaded from other modules. Which modules are loaded is
based on the following criteria passed to its constructor:
- mod_names: A list of modules to load and investigate
- type_name_filter: A regular filter expression or None (default).
If it's None, all types pass this filter.
- type_filter: A list of types the returned types must match.
Defaults to [], in which case all types pass this filter
Signed-off-by: Jan Lindemann <jan@janware.com>
A dedicated logging module is currently provided by jw-python, but
since it's often needed also in jw-pkg, and it's relatively small and
maintainable, it seems justified to move it into jw-pkg.
Signed-off-by: Jan Lindemann <jan@janware.com>
