tests: make test-check-module-imports more robust It failed for me without this in this way: tests/test-commandserver.t:19: relative import of stdlib module tests/test-lfs-serve.t:108: relative import of stdlib module tests/test-lfs-serve.t:255: relative import of stdlib module tests/test-lfs-serve.t:362: relative import of stdlib module tests/test-lfs-serve.t:406: relative import of stdlib module tests/test-lock.py:9: imports not lexically sorted: silenttestrunner < unittest, True, True tests/test-lrucachedict.py:5: imports not lexically sorted: silenttestrunner < unittest, True, True tests/test-match.py:5: imports not lexically sorted: silenttestrunner < unittest, True, True tests/test-remotefilelog-datapack.py:15: imports not lexically sorted: silenttestrunner < unittest, True, True tests/test-remotefilelog-histpack.py:14: imports not lexically sorted: silenttestrunner < unittest, True, True tests/test-simplekeyvaluefile.py:4: imports not lexically sorted: silenttestrunner < unittest, True, True tests/test-sshserver.py:6: imports not lexically sorted: silenttestrunner < unittest, True, True This is because every module is considered a stdlib module, because the stdlib_prefixes is /usr, and my repo is in /usr/local/home, which means that sys.path contains a couple of /usr/local/home/../hg/.. entries that count as "in the stdlib". Fix this by preventing any path in sys.path that's inside the mercurial source from being considered "in the stdlib". Differential Revision: https://phab.mercurial-scm.org/D5294

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#!/usr/bin/env python

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#

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# Dumps output generated by Mercurial's command server in a formatted style to a

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# given file or stderr if '-' is specified. Output is also written in its raw

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# format to stdout.

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#

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# $ ./hg serve --cmds pipe | ./contrib/debugcmdserver.py -

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# o, 52   -> 'capabilities: getencoding runcommand\nencoding: UTF-8'

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from __future__ import absolute_import, print_function

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import struct

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import sys

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if len(sys.argv) != 2:

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    print('usage: debugcmdserver.py FILE')

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    sys.exit(1)

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outputfmt = '>cI'

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outputfmtsize = struct.calcsize(outputfmt)

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if sys.argv[1] == '-':

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    log = sys.stderr

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else:

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    log = open(sys.argv[1], 'a')

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def read(size):

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    data = sys.stdin.read(size)

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    if not data:

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        raise EOFError

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    sys.stdout.write(data)

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    sys.stdout.flush()

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    return data

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try:

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    while True:

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        header = read(outputfmtsize)

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        channel, length = struct.unpack(outputfmt, header)

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        log.write('%s, %-4d' % (channel, length))

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        if channel in 'IL':

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            log.write(' -> waiting for input\n')

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        else:

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            data = read(length)

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            log.write(' -> %r\n' % data)

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        log.flush()

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except EOFError:

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    pass

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finally:

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    if log != sys.stderr:

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        log.close()