Mercurial > hg > mercurial-crew-with-dirclash
annotate contrib/hg-ssh @ 2577:fa76c5d609c9
bdiff: improve worst case behavior by 100x.
on 5.8MB (244.000 lines) text file with similar lines, hash before
this change made diff against empty file take 75 seconds. this change
improves performance to 0.6 seconds. result is that clone of smallish
repo (137MB) with some files like this takes 1 minute instead of 10
minutes.
common case of diff is 10% slower now, probably because of worse cache
locality. but diff does not affect overall performance in common case
(less than 1% of runtime is in diff when it is working ok), so this
tradeoff looks good.
author | Vadim Gelfer <vadim.gelfer@gmail.com> |
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date | Fri, 07 Jul 2006 15:02:55 -0700 |
parents | 9a5b778f7e2d |
children | 831ebc408ffb |
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1 #!/usr/bin/env python |
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2 # |
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3 # Copyright 2005, 2006 by Intevation GmbH <intevation@intevation.de> |
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4 # Author(s): |
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5 # Thomas Arendsen Hein <thomas@intevation.de> |
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6 # |
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7 # This software may be used and distributed according to the terms |
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8 # of the GNU General Public License, incorporated herein by reference. |
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9 |
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10 """ |
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11 hg-ssh - a wrapper for ssh access to a limited set of mercurial repos |
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12 |
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13 To be used in ~/.ssh/authorized_keys with the "command" option, see sshd(8): |
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14 command="hg-ssh path/to/repo1 /path/to/repo2 ~/repo3 ~user/repo4" ssh-dss ... |
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15 (probably together with these other useful options: |
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16 no-port-forwarding,no-X11-forwarding,no-agent-forwarding) |
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17 |
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18 This allows pull/push over ssh to to the repositories given as arguments. |
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19 |
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20 If all your repositories are subdirectories of a common directory, you can |
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21 allow shorter paths with: |
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22 command="cd path/to/my/repositories && hg-ssh repo1 subdir/repo2" |
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23 |
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24 You can use pattern matching of your normal shell, e.g.: |
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25 command="cd repos && hg-ssh user/thomas/* projects/{mercurial,foo}" |
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26 """ |
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27 |
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28 from mercurial import commands |
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29 |
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30 import sys, os |
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31 |
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32 cwd = os.getcwd() |
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33 allowed_paths = [os.path.normpath(os.path.join(cwd, os.path.expanduser(path))) |
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34 for path in sys.argv[1:]] |
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35 orig_cmd = os.getenv('SSH_ORIGINAL_COMMAND', '?') |
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36 |
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37 if orig_cmd.startswith('hg -R ') and orig_cmd.endswith(' serve --stdio'): |
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38 path = orig_cmd[6:-14] |
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39 repo = os.path.normpath(os.path.join(cwd, os.path.expanduser(path))) |
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40 if repo in allowed_paths: |
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41 commands.dispatch(['-R', repo, 'serve', '--stdio']) |
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42 else: |
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43 sys.stderr.write("Illegal repository %r\n" % repo) |
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44 sys.exit(-1) |
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45 else: |
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46 sys.stderr.write("Illegal command %r\n" % orig_cmd) |
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47 sys.exit(-1) |
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48 |