view contrib/python-hook-examples.py @ 45377:da3b7c80aa34

hgweb: handle None from templatedir() equally bad in webcommands.py

The following paragraph is based just on my reading of the code; I
have not tried to test it.

Before my recent work on templates in frozen binaries, it seems both
`hgwebdir_mod.py` and `webcommands.py` would pass in an empty list
into `staticfile()` when running in a frozen binary. That would then
result in a variable in that function (`path`) not getting bound
before its first use. I then changed that without thinking in D8786 so
we passed a `None` value into the function, which made it break in
another way (trying to iterate over `None`). Then I tried to fix it up
in D8810, but I only changed `hgwebdir_mod.py` for some reason, and it
still doesn't actually work in frozen binaries (which seems fair,
since was broken before my changes too).

This patch just replicates the half-assed "fix" from D8810 in
`webcommands.py`, so they look more similar so I can start refactoring
them in the same way.

Differential Revision: https://phab.mercurial-scm.org/D8933

'''
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)))