view contrib/python-hook-examples.py @ 47049:25d36300ba8e stable

Backed out changeset 9b8f326731ac

Unfortunately, disabling the rust extensions means newer
Mercurial versions no longer have the persistent-nodemap
feature enabled.
This means a Mercurial 5.8.1 on RPM-based Linux distributions
will no longer be able to read repositories created
by a Mercurial 5.8 on RPM-based Linux distributions.

This violates the compatibility rules
(see https://www.mercurial-scm.org/wiki/CompatibilityRules ).

For this reason, I have to backout this change.
I'll try to find another solution to the 'hg purge' crashes.

Differential Revision: https://phab.mercurial-scm.org/D10918

'''
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.changelog.tip()
    else:
        last = node
    diff = patch.diff(repo, first, last)
    ui.write(patch.diffstat(util.iterlines(diff)))