contrib/python-hook-examples.py

add debugignore which yields the combined ignore patten of the .hgignore files

For GUI clients its sometimes important to know which files will be ignored and
which files will be important. This allows the GUI client to skipping redoing a
'hg status' when the files are ignored but have changed. (For instance, a
typical case is that the "build" directory inside some project is ignored but
files in it frequently change.)

'''
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)))