comparison mercurial/ui.py @ 38345:bec1212eceaa

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

38344:c6f82a18a63d

            self.debug('%s:%s %d/%d%s (%4.2f%%)\n'
                     % (topic, item, pos, total, unit, pct))
        else:
            self.debug('%s:%s %d%s\n' % (topic, item, pos, unit))

    def log(self, service, *msg, **opts):
        '''hook for logging facility extensions

        service should be a readily-identifiable subsystem, which will
        allow filtering.

38345:bec1212eceaa

            self.debug('%s:%s %d/%d%s (%4.2f%%)\n'
                     % (topic, item, pos, total, unit, pct))
        else:
            self.debug('%s:%s %d%s\n' % (topic, item, pos, unit))

    def makeprogress(self, topic, unit="", total=None):
        '''exists only so low-level modules won't need to import scmutil'''
        return scmutil.progress(self, topic, unit, total)

    def log(self, service, *msg, **opts):
        '''hook for logging facility extensions

        service should be a readily-identifiable subsystem, which will
        allow filtering.