view contrib/python-hook-examples.py @ 49642:37de1a154472 stable

tests: make sure pygments can detect python script without extension

This .t file was failing for me when running run-tests.py with python3.11. Then
I tried to run it with python3.10 and it failed anyway, even though it's the
default python3 interpreter. But with `python3 ./run-tests.py` it worked fine.

And this is what I found while looking at the way pygments lexer checks if a
file without extension is likely to be a python script:

  shebang_matches(text, r'pythonw?(3(\.\d)?)?')

Take guess why it doesn't work for python >= 3.10.

To work around this issue, we can simply hardcode an "easier" shebang for
pygments. This path to python interpreter obviously doesn't need to be
accurate, since we're not running this script.

'''
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.changelog.tip()
    else:
        last = node
    diff = patch.diff(repo, first, last)
    ui.write(patch.diffstat(util.iterlines(diff)))