contrib/python-hook-examples.py

obsmarker: add `date` as an explicit field

The markers are now 5-item tuples (concluded by the date). The obsstore.fields
contents have been updated accordingly.

There is no change to the on-disk format yet, so the date has to be extracted
every time we read binary markers and re-injected each team we write them. This
introduces a slowdown that will be solved when a new version of the format is
added. Such a slowdown was already introduced by the evolve extension anyway.

'''
Examples of useful python hooks for Mercurial.
'''
from mercurial import patch, util

def diffstat(ui, repo, **kwargs):
    '''Example usage:

    [hooks]
    commit.diffstat = python:/path/to/this/file.py:diffstat
    changegroup.diffstat = python:/path/to/this/file.py:diffstat
    '''
    if kwargs.get('parent2'):
        return
    node = kwargs['node']
    first = repo[node].p1().node()
    if 'url' in kwargs:
        last = repo['tip'].node()
    else:
        last = node
    diff = patch.diff(repo, first, last)
    ui.write(patch.diffstat(util.iterlines(diff)))