progress: create helper class for incrementing progress...
progress: create helper class for incrementing progress
When using ui.progress(), there's a clear pattern that is followed:
* Pass the same topic and unit
* Usually pass the same total
* Call with pos=None to close the progress bar
* Often keep track of the current position and increment it
This patch creates a simple helper class for this. I'll probably make
it implement the context manager protocol later (calling update(None)
on __exit__).
Progress is used in low-level modules like changegroup, so I also
exposed it via a method on the ui object. Perhaps the class itself
should also live in ui.py?
This patch also makes merge.oy use it to show that it works.
Differential Revision:
https://phab.mercurial-scm.org/D3765
