Mercurial > hg
annotate tests/test-largefiles-small-disk.t @ 15571:809788118aa2 stable
largefiles: write .hg/largefiles/ files atomically
Before, it was possible to create a
.hg/largefiles/hash
file with truncated content, i.e., content where
SHA-1(content) != hash
This breaks the fundamental invariant in largefiles that the file
content for files in .hg/largefiles hash to the filename.
author | Martin Geisler <mg@aragost.com> |
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date | Thu, 24 Nov 2011 18:12:13 +0100 |
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children | 926bc23d0b6a |
rev | line source |
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15571
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largefiles: write .hg/largefiles/ files atomically
Martin Geisler <mg@aragost.com>
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1 Test how largefiles abort in case the disk runs full |
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2 |
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3 $ cat > criple.py <<EOF |
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4 > import os, errno, shutil |
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5 > from mercurial import util |
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6 > # |
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7 > # this makes the original largefiles code abort: |
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8 > def copyfileobj(fsrc, fdst, length=16*1024): |
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9 > fdst.write(fsrc.read(4)) |
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10 > raise IOError(errno.ENOSPC, os.strerror(errno.ENOSPC)) |
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11 > shutil.copyfileobj = copyfileobj |
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12 > # |
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13 > # this makes the rewritten code abort: |
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14 > def filechunkiter(f, size=65536, limit=None): |
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15 > yield f.read(4) |
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16 > raise IOError(errno.ENOSPC, os.strerror(errno.ENOSPC)) |
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17 > util.filechunkiter = filechunkiter |
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18 > EOF |
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19 |
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20 $ echo "[extensions]" >> $HGRCPATH |
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21 $ echo "largefiles =" >> $HGRCPATH |
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22 |
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23 $ hg init alice |
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24 $ cd alice |
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25 $ echo "this is a very big file" > big |
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26 $ hg add --large big |
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27 $ hg commit --config extensions.criple=$TESTTMP/criple.py -m big |
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28 abort: No space left on device |
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29 [255] |
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30 |
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31 The largefile is not created in .hg/largefiles: |
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32 |
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33 $ ls .hg/largefiles |
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34 dirstate |
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35 |
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36 The user cache is not even created: |
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37 |
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38 >>> import os; os.path.exists("$HOME/.cache/largefiles/") |
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39 False |