contrib/python-hook-examples.py

convert: Work around p4 instability (issue2465)

The p4 command-line client sometimes fails upon doing "p4 describe"
when trying to produce a patch. (I'm guessing it's a bug in p4.)
However, "hg convert" doesn't even make use of the patch, and it can
be elided by adding "-s" to the p4 command line here.

'''
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].parents()[0].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)))