Mercurial > public > mercurial-scm > hg

annotate contrib/debugcmdserver.py @ 39878:3e896b51aa5d

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storageutil: move metadata parsing and packing from revlog (API) Parsing and writing of revision text metadata is likely identical across storage backends. Let's move the code out of revlog so we don't need to import the revlog module in order to use it. Differential Revision: https://phab.mercurial-scm.org/D4754
author Gregory Szorc <gregory.szorc@gmail.com>
date Mon, 24 Sep 2018 14:31:31 -0700
parents cd03fbd5ab57
children 2372284d9457
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1d1f6dff9364 contrib: add a script to help diagnose raw output of the cmdserver
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1 #!/usr/bin/env python
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2 #
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3 # Dumps output generated by Mercurial's command server in a formatted style to a
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4 # given file or stderr if '-' is specified. Output is also written in its raw
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5 # format to stdout.
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6 #
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7 # $ ./hg serve --cmds pipe | ./contrib/debugcmdserver.py -
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8 # o, 52 -> 'capabilities: getencoding runcommand\nencoding: UTF-8'
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9
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cd03fbd5ab57 debugcmdserver: use absolute_import and print_function
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10 from __future__ import absolute_import, print_function
cd03fbd5ab57 debugcmdserver: use absolute_import and print_function
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11 import struct
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12 import sys
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13
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14 if len(sys.argv) != 2:
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15 print('usage: debugcmdserver.py FILE')
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16 sys.exit(1)
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17
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18 outputfmt = '>cI'
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19 outputfmtsize = struct.calcsize(outputfmt)
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20
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21 if sys.argv[1] == '-':
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22 log = sys.stderr
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23 else:
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24 log = open(sys.argv[1], 'a')
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25
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26 def read(size):
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27 data = sys.stdin.read(size)
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28 if not data:
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29 raise EOFError
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30 sys.stdout.write(data)
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31 sys.stdout.flush()
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32 return data
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33
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34 try:
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35 while True:
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36 header = read(outputfmtsize)
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37 channel, length = struct.unpack(outputfmt, header)
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38 log.write('%s, %-4d' % (channel, length))
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39 if channel in 'IL':
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40 log.write(' -> waiting for input\n')
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41 else:
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42 data = read(length)
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43 log.write(' -> %r\n' % data)
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44 log.flush()
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45 except EOFError:
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46 pass
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47 finally:
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48 if log != sys.stderr:
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49 log.close()