hg
author Augie Fackler <augie@google.com>
Tue, 21 Aug 2018 15:25:46 -0400
changeset 39592 5e78c100a215
parent 34533 163fa0aea71e
child 43073 5c9c71cde1c9
permissions -rwxr-xr-x
hg: wrap the highest layer in the `hg` script possible in trace event This should help us have a better idea of what "interpreter startup costs" look like. This does omit the HGUNICODEPEDANTRY block and the LIBDIR dancing to set up sys.path, but the former is usually off and the latter is unavoidable and should be very fast. If we get worried about those cases we can consider open-coding the tracing logic here. Differential Revision: https://phab.mercurial-scm.org/D4346
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#!/usr/bin/env python
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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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if os.environ.get('HGUNICODEPEDANTRY', False):
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    try:
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        reload(sys)
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        sys.setdefaultencoding("undefined")
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    except NameError:
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        pass
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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(os.path.dirname(os.path.realpath(__file__)),
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                              libdir)
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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; hgdemandimport.enable()
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    except ImportError:
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        sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" %
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                         ' '.join(sys.path))
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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()