py3: update the remaining shebang lines (mostly tests) to `python3` I noticed this when running `py hghave` on a system that still has Python2- the Windows launcher attempts to honor the version of python in the shebang, but `hghave` recently gained py3 type annotations, so that resulted in a SyntaxError. I guess CI has the compat shim installed to redirect `python` to `python3`, and maybe that's why nobody noticed. These were located by grepping for `#!.+python\b`. The remaining handful of cases are tests trying to find python files, which is fine as-is. The one thing to call out here is that apparently the RPM building hasn't worked with Python3 (or we've been getting lucky). `contrib/hg-ssh` has had a python3 shebang line since late 2020, which means the EOL anchor would have caused it to not match and not be replaced with `%{pythonexe}`. OTOH, it looks like that variable was used prior to the `hg-ssh` update in order to default to python3 (as opposed to using a specific /path/to/pythonX), and maybe the update to `hg-ssh` simply broke python2 builds. I'm not going to worry about this for now, since there are also direct calls to `setup.py`, which no longer work as of this release cycle. Somebody interested in RPMs can figure out all of the issues at once.

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#!/usr/bin/env python3

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import sys

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from mercurial import (

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    commands,

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    localrepo,

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    ui as uimod,

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)

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print_ = print

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def print(*args, **kwargs):

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    """print() wrapper that flushes stdout buffers to avoid py3 buffer issues

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    We could also just write directly to sys.stdout.buffer the way the

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    ui object will, but this was easier for porting the test.

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    """

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    print_(*args, **kwargs)

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    sys.stdout.flush()

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u = uimod.ui.load()

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print('% creating repo')

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repo = localrepo.instance(u, b'.', create=True)

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f = open('test.py', 'w')

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try:

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    f.write('foo\n')

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finally:

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    f.close

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print('% add and commit')

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commands.add(u, repo, b'test.py')

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commands.commit(u, repo, message=b'*')

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commands.status(u, repo, clean=True)

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print('% change')

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f = open('test.py', 'w')

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try:

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    f.write('bar\n')

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finally:

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    f.close()

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# this would return clean instead of changed before the fix

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commands.status(u, repo, clean=True, modified=True)