`todo` and `todo list` show different results

[WhyNotHugo]

Due to the way we call the default command, callbacks aren't being run, so _validate_startable_param will never run. We already have hacks in place due to this scenario, so we really need to start looking at how we're implementing this.

[untitaker]

I don't understand what you mean here. Could you give an example invocation/config where those behave differently?

[WhyNotHugo]

todo list --startable and todo --startable yield different results, since the latter won't forward the --startable flag to the list command.

[untitaker]

I don't think this is cleanly implementable in Click.

[WhyNotHugo]

#238 goes halfway there, but there are other issues (--porcelain --startable) ignores the first flag.

[aleprovencio]

I've also noticed that when startable option is set to true on todoman.conf, the --start option returns wrong results.

[hanophora]

I think my issue is related to this one.

I have startable=true in my config file. todo list correctly hides non-startable tasks, but todo does not.

I hacked it so that startable was correctly passed to the list subcommand, but then I had no way to display non-startable tasks. So I added a --no-startable option.

This is still not perfect: I'd like a way to show only non-startable tasks (with a --unstartable perhaps?). But that'd be more of a feature than a fix.

Here's my hack's patch. There's probably a cleaner way to do this. (I also fixed a typo in --startable's help message).

--- cli.py	2018-08-06 19:41:50.206590030 +0200
+++ /usr/lib/python3/dist-packages/todoman/cli.py	2018-08-06 20:01:14.562939507 +0200
@@ -109,11 +109,6 @@
         raise click.BadParameter(e)
 
 
-def _validate_startable_param(ctx, param, val):
-    ctx = ctx.find_object(AppContext)
-    return val or ctx.config['main']['startable']
-
-
 def _validate_todos(ctx, param, val):
     ctx = ctx.find_object(AppContext)
     with handle_error():
@@ -592,12 +587,11 @@
     help='Only shows tasks before/after given DATE'
 )
 @click.option(
-    '--startable',
+    '--startable/--no-startable',
     default=None,
     is_flag=True,
-    callback=_validate_startable_param,
     help='Show only todos which '
-    'should can be started today (i.e.: start time is not in the '
+    'can be started today (i.e.: start time is not in the '
     'future).'
 )
 @click.option(
@@ -628,5 +622,8 @@
     The following commands can further filter shown todos, or include those
     omited by default:
     """
+    if kwargs['startable'] is None:  # False means explicitly disabled
+        kwargs['startable'] = ctx.config['main']['startable']
+
     todos = ctx.db.todos(**kwargs)
     click.echo(ctx.formatter.compact_multiple(todos))