annotate contrib/python-hook-examples.py @ 20517:2158e8f3cbd2

createmarkers: allow to pass metadata for a marker only

The `metadata` argument only allow to specify metadata for all new markers. We
extension the format of the `relations` argument to support optional metadata
argument.

The first user of this should be the evolve extension who want to store parent
information of pruned changeset in extra (until we make a second version of the
format)

'''
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)))