view contrib/python-hook-examples.py @ 49018:a78c45a22ce4

perf-util: add a `compare-discovery-case` script

This script run the same discovery case using multiple variants of the algorithm
and report differences in behavior, especially regarding the numbers of roundtrip.

Differential Revision: https://phab.mercurial-scm.org/D12399

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