hg
author Gregory Szorc <gregory.szorc@gmail.com>
Fri, 06 Nov 2020 13:58:59 -0800
changeset 45830 c102b704edb5
parent 43659 99e231afc29c
child 46055 7740d5102760
permissions -rwxr-xr-x
global: use python3 in shebangs Python 3 is the future. We want Python scripts to be using Python 3 by default. This change updates all `#!/usr/bin/env python` shebangs to use `python3`. Does this mean all scripts use or require Python 3: no. In the test environment, the `PATH` environment variable in tests is updated to guarantee that the Python executable used to run run-tests.py is used. Since test scripts all now use `#!/usr/bin/env python3`, we had to update this code to install a `python3` symlink instead of `python`. It is possible there are some random scripts now executed with the incorrect Python interpreter in some contexts. However, I would argue that this was a pre-existing bug: we should almost always be executing new Python processes using the `sys.executable` from the originating Python script, as `python` or `python3` won't guarantee we'll use the same interpreter. Differential Revision: https://phab.mercurial-scm.org/D9273
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#!/usr/bin/env python3
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#
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# mercurial - scalable distributed SCM
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#
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# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import os
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import sys
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libdir = '@LIBDIR@'
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if libdir != '@' 'LIBDIR' '@':
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    if not os.path.isabs(libdir):
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        libdir = os.path.join(
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            os.path.dirname(os.path.realpath(__file__)), libdir
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        )
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        libdir = os.path.abspath(libdir)
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    sys.path.insert(0, libdir)
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from hgdemandimport import tracing
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with tracing.log('hg script'):
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    # enable importing on demand to reduce startup time
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    try:
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        if sys.version_info[0] < 3 or sys.version_info >= (3, 6):
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            import hgdemandimport
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            hgdemandimport.enable()
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    except ImportError:
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        sys.stderr.write(
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            "abort: couldn't find mercurial libraries in [%s]\n"
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            % ' '.join(sys.path)
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        )
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        sys.stderr.write("(check your install and PYTHONPATH)\n")
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        sys.exit(-1)
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    from mercurial import dispatch
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    dispatch.run()