view contrib/python-hook-examples.py @ 38128:1cba497491be

narrow: only wrap dirstate functions once, instead of per-reposetup

chg will call reposetup multiple times, and we would end up double-wrapping (or
worse) the dirstate functions; this can cause issues like OSError 'No such file
or directory' during rebase operations, when we go to double-delete our
narrowspec backup file.

Differential Revision: https://phab.mercurial-scm.org/D3559

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