view contrib/python-hook-examples.py @ 45158:ed58ecd59030

windows: don’t set `softspace` attribute in `winstdout`

Python 2 file objects have the `softspace` attribute
(https://docs.python.org/2/library/stdtypes.html#file.softspace), which is used
by the print statement to track its internal state. The documentation demands
from file-like objects only that the attribute is writable and initialized to
0. Method `file.write()` sets it to 0, but this is not documented.
Historically, sys.stdout was replaced by an instance of the `winstdout` class,
so it needed to behave exactly the same (the softspace fix was introduced in
705278e70457). Nowadays we don’t replace sys.stdout and don’t use the print
statement on `winstdout` instances, so we can safely drop it.

'''
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)))