tests/check-perf-code.py
author Gregory Szorc <gregory.szorc@gmail.com>
Thu, 03 Mar 2022 17:34:00 +0100
changeset 48875 6000f5b25c9b
parent 45830 c102b704edb5
permissions -rwxr-xr-x
py2: remove simple from __future__ statements These were needed for Python 2 support. Now that our linter no longer mandates these, we can start deleting them. Differential Revision: https://phab.mercurial-scm.org/D12254
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#!/usr/bin/env python3
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#
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# check-perf-code - (historical) portability checker for contrib/perf.py
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import os
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import sys
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# write static check patterns here
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perfpypats = [
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    [
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        (
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            r'(branchmap|repoview|repoviewutil)\.subsettable',
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            "use getbranchmapsubsettable() for early Mercurial",
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        ),
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        (
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            r'\.(vfs|svfs|opener|sopener)',
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            "use getvfs()/getsvfs() for early Mercurial",
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        ),
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        (
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            r'ui\.configint',
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            "use getint() instead of ui.configint() for early Mercurial",
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        ),
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    ],
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    # warnings
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    [],
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]
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def modulewhitelist(names):
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    replacement = [
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        ('.py', ''),
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        ('.c', ''),  # trim suffix
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        ('mercurial%s' % '/', ''),  # trim "mercurial/" path
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    ]
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    ignored = {'__init__'}
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    modules = {}
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    # convert from file name to module name, and count # of appearances
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    for name in names:
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        name = name.strip()
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        for old, new in replacement:
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            name = name.replace(old, new)
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        if name not in ignored:
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            modules[name] = modules.get(name, 0) + 1
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    # list up module names, which appear multiple times
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    whitelist = []
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    for name, count in modules.items():
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        if count > 1:
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            whitelist.append(name)
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    return whitelist
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if __name__ == "__main__":
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    # in this case, it is assumed that result of "hg files" at
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    # multiple revisions is given via stdin
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    whitelist = modulewhitelist(sys.stdin)
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    assert whitelist, "module whitelist is empty"
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    # build up module whitelist check from file names given at runtime
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    perfpypats[0].append(
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        # this matching pattern assumes importing modules from
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        # "mercurial" package in the current style below, for simplicity
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        #
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        #    from mercurial import (
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        #        foo,
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        #        bar,
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        #        baz
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        #    )
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        (
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            (
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                r'from mercurial import [(][a-z0-9, \n#]*\n(?! *%s,|^[ #]*\n|[)])'
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                % ',| *'.join(whitelist)
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            ),
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            "import newer module separately in try clause for early Mercurial",
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        )
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    )
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    # import contrib/check-code.py as checkcode
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    assert 'RUNTESTDIR' in os.environ, "use check-perf-code.py in *.t script"
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    contribpath = os.path.join(os.environ['RUNTESTDIR'], '..', 'contrib')
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    sys.path.insert(0, contribpath)
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    checkcode = __import__('check-code')
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    # register perf.py specific entry with "checks" in check-code.py
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    checkcode.checks.append(
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        ('perf.py', r'contrib/perf.py$', '', checkcode.pyfilters, perfpypats)
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    )
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    sys.exit(checkcode.main())