contrib/python-hook-examples.py

convert/svn: fix _iterfiles() output in root dir case (issue2647)

When converting directory additions/replacement with project directory set to
root, _iterfiles() sometimes returned paths starting with a slash making
following svn calls to fail.

I could not reproduce the issue with hand-crafted repositories.

Report and first analysis by Clinton Chau <[e-mail]>

'''
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)))