Mercurial > hg
annotate tests/test-hgwebdir-paths.py @ 14007:d764463b433e
atomictempfile: avoid infinite recursion in __del__().
The problem is that a programmer using atomictempfile directly can
make an innocent everyday mistake -- not enough args to the
constructor -- which escalates badly. You would expect a simple
TypeError crash in that case, but you actually get an infinite
recursion that is surprisingly difficult to kill: it happens between
__del__() and __getattr__(), and Python does not handle infinite
recursion from __del__() well.
The fix is to not implement __getattr__(), but instead assign instance
attributes for the methods we wish to delegate to the builtin file
type: write() and fileno(). I've audited mercurial.* and hgext.* and
found no users of atomictempfile using methods other than write() and
rename(). I audited third-party extensions and found one (snap)
passing an atomictempfile to util.fstat(), so I also threw in
fileno().
The last time I submitted a similar patch, Matt proposed that we make
atomictempfile a subclass of file instead of wrapping it. Rejected on
grounds of unnecessary complexity: for one thing, it would make the
Windows implementation of posixfile quite a bit more complex. It would
have to become a subclass of file rather than a simple function -- but
since it's written in C, this is non-obvious and non-trivial.
Furthermore, there's nothing wrong with wrapping objects and
delegating methods: it's a well-established pattern that works just
fine in many cases. Subclassing is not the answer to all of life's
problems.
author | Greg Ward <greg@gerg.ca> |
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date | Sun, 24 Apr 2011 19:25:10 -0400 |
parents | a767998f0a78 |
children | dbdb777502dc |
rev | line source |
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a767998f0a78
hgweb: make hgwebdir handle dict/list paths the same as config paths
Jeremy Whitlock <jcscoobyrs@gmail.com>
parents:
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1 import os |
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hgweb: make hgwebdir handle dict/list paths the same as config paths
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parents:
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2 from mercurial import hg, ui |
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3 from mercurial.hgweb.hgwebdir_mod import hgwebdir |
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4 |
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5 os.mkdir('webdir') |
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6 os.chdir('webdir') |
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7 |
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8 webdir = os.path.realpath('.') |
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9 |
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10 u = ui.ui() |
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11 hg.repository(u, 'a', create=1) |
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12 hg.repository(u, 'b', create=1) |
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13 os.chdir('b') |
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14 hg.repository(u, 'd', create=1) |
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15 os.chdir('..') |
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16 hg.repository(u, 'c', create=1) |
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17 os.chdir('..') |
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18 |
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19 paths = {'t/a/': '%s/a' % webdir, |
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20 'b': '%s/b' % webdir, |
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21 'coll': '%s/*' % webdir, |
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22 'rcoll': '%s/**' % webdir} |
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23 |
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24 config = os.path.join(webdir, 'hgwebdir.conf') |
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25 configfile = open(config, 'w') |
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26 configfile.write('[paths]\n') |
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27 for k, v in paths.items(): |
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28 configfile.write('%s = %s\n' % (k, v)) |
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29 configfile.close() |
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30 |
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31 confwd = hgwebdir(config) |
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32 dictwd = hgwebdir(paths) |
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33 |
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34 assert len(confwd.repos) == len(dictwd.repos), 'different numbers' |
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35 assert len(confwd.repos) == 9, 'expected 9 repos, found %d' % len(confwd.repos) |
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36 |
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37 found = dict(confwd.repos) |
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38 for key, path in dictwd.repos: |
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39 assert key in found, 'repository %s was not found' % key |
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40 assert found[key] == path, 'different paths for repo %s' % key |