view contrib/python-hook-examples.py @ 42423:0ae593e791fb

profiling: show actual time spent in hotpath display

To get, for instance:

...
 \  6.6%  4.08s  lock.py:        __exit__          line 1566: ...
   |  6.5%  4.01s  exchange.py:    close           line 1191: ...
   |  6.5%  4.01s  transaction.py: _active         line 1443: ...
   |  6.5%  4.01s  transaction.py: close           line 47:   ...
   |  6.2%  3.84s  scmutil.py:     wrapped         line 529:  ...
   |  6.2%  3.81s  localrepo.py:   wrapper         line 2114: ...
   |  6.2%  3.81s  localrepo.py:   updatecaches    line 177:  ...
   ...

instead of:

...
 \  6.6%  lock.py:        __exit__          line 1566: ...
   |  6.5%  exchange.py:    close           line 1191: ...
   |  6.5%  transaction.py: _active         line 1443: ...
   |  6.5%  transaction.py: close           line 47:   ...
   |  6.2%  scmutil.py:     wrapped         line 529:  ...
   |  6.2%  localrepo.py:   wrapper         line 2114: ...
   |  6.2%  localrepo.py:   updatecaches    line 177:  ...
   ...

I find that if it's not displayed, I frequently end up estimating the
numbers by hand.

Differential Revision: https://phab.mercurial-scm.org/D6477

'''
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)))