contrib/python-hook-examples.py

mq: avoid a silly conversion from binary nodeid to hex

We generally deal with binary nodeids in code. In this case the hex
nodeid was passed to strip.checksubstate() where it was passed to
repo.__getitem__, which of course accepts a binary nodeid.

Differential Revision: https://phab.mercurial-scm.org/D3141

'''
Examples of useful python hooks for Mercurial.
'''
from __future__ import absolute_import
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)))