By default, argcomplete uses argcomplete.FilesCompleter as default
for every argument. This mixes accessible files into the list of
possible completions. For most of jw-pkg's commands, that's unwanted,
so turn it off by defining a NoopCompleter class which does nothing,
and by set every arguments's default completer to a NoopCompleter
instance. If desired, completing files can be restored for an
argument by
parser.add_argument("some-arg").completer = FilesCompleter()
Signed-off-by: Jan Lindemann <jan@janware.com>
Every module derived from lib.Cmd implements its own
parser.add_argument() logic. As a consequence, all Cmd derived
modules need to be loaded to have the full argument tree available.
This is avoided during normal program startup because it takes some
time. It's not necessary during normal program execution, nor for
showing help messages. It is, however, needed for argcomplete to do
its thing, so fully parse the command line if the program runs in
argcomplete mode, as determined by checking if _ARGCOMPLETE is
present in the environment.
Signed-off-by: Jan Lindemann <jan@janware.com>
Use the AsyncRunner class introduced in the previous commit to add a
call_async() method, allowing to run async functions from sync
functions by spawning an extra event loop.
Signed-off-by: Jan Lindemann <jan@janware.com>
Expose App's __eloop member containing the application's main event
loop to allow outside async event loop trickery.
Signed-off-by: Jan Lindemann <jan@janware.com>
If a Cmd-classes's _run() method returns an integer between 0 and
255, use that as the program's exit status.
Signed-off-by: Jan Lindemann <jan@janware.com>
Don't log an Exception as {e} but as str(e) producing nicer output.
Or as repr(e) if a backtrace is requested, because to people who can
read backtraces, type info might be of interest. Also, remove
pointless time stamps, those belong into the logging framework.
Signed-off-by: Jan Lindemann <jan@janware.com>
If Python's autocomplete is not installed, jw-pkg.py fails to run
commands. Fix that in order stay compatible with minimal excecution
environments.
Signed-off-by: Jan Lindemann <jan@janware.com>
During __init__(), commands have no idea of their parent. This is not
a problem as of now, but is easy to fix, and it's architecturally
desirable to be prepared just in case, so add the parent argument to
the ctor before more commands are added.
Signed-off-by: Jan Lindemann <jan@janware.com>
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>
