view contrib/python-hook-examples.py @ 16789:c17ce7cd5090 stable

match: make 'match.files()' return list object always

'exact' match objects are sometimes created with a non-list 'pattern'
argument:

  - using 'set' in queue.refresh():hgext/mq.py
        match = scmutil.matchfiles(repo, set(c[0] + c[1] + c[2] + inclsubs))

  - using 'dict' in revert():mercurial/cmdutil.py (names = {})
        m = scmutil.matchfiles(repo, names)

'exact' match objects return specified 'pattern' to callers of
'match.files()' as it is, so it is a non-list object.

but almost all implementations expect 'match.files()' to return a list
object, so this may causes problems: e.g. exception for "+" with
another list object.

this patch ensures that '_files' of 'exact' match objects is a list
object.

for non 'exact' match objects, parsing specified 'pattern' already
ensures that it it a list one.

'''
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)))