contrib/python-hook-examples.py

diffhelpers: use Py_ssize_t in _fix_newline()

Eliminates

  mercurial/diffhelpers.c(23) : warning C4244: 'initializing' : conversion from
  'Py_ssize_t' to 'int', possible loss of data
  mercurial/diffhelpers.c(26) : warning C4244: 'initializing' : conversion from
  'Py_ssize_t' to 'int', possible loss of data
  mercurial/diffhelpers.c(27) : warning C4244: 'initializing' : conversion from
  'Py_ssize_t' to 'int', possible loss of data
  mercurial/diffhelpers.c(30) : warning C4244: 'initializing' : conversion from
  'Py_ssize_t' to 'int', possible loss of data

when compiling for Windows x64 target using the Microsoft compiler.

'''
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)))