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annotate tests/test-largefiles-small-disk.t @ 31257:11831d755b51

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merge: remove uses of manifest.matches This gets rid of the manifest.matches calls in merge.py in favor of the new api. This is part of getting rid of manifest.matches since it is O(manifest).
author Durham Goode <durham@fb.com>
date Tue, 07 Mar 2017 18:38:20 -0800
parents 1ef37b16b8e8
children 991134261057
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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809788118aa2 largefiles: write .hg/largefiles/ files atomically
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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 > _origcopyfileobj = shutil.copyfileobj
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9 > def copyfileobj(fsrc, fdst, length=16*1024):
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10 > # allow journal files (used by transaction) to be written
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11 > if 'journal.' in fdst.name:
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12 > return _origcopyfileobj(fsrc, fdst, length)
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13 > fdst.write(fsrc.read(4))
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14 > raise IOError(errno.ENOSPC, os.strerror(errno.ENOSPC))
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15 > shutil.copyfileobj = copyfileobj
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16 > #
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17 > # this makes the rewritten code abort:
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18 > def filechunkiter(f, size=131072, limit=None):
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19 > yield f.read(4)
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20 > raise IOError(errno.ENOSPC, os.strerror(errno.ENOSPC))
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21 > util.filechunkiter = filechunkiter
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22 > #
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23 > def oslink(src, dest):
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24 > raise OSError("no hardlinks, try copying instead")
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25 > util.oslink = oslink
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26 > EOF
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27
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28 $ echo "[extensions]" >> $HGRCPATH
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29 $ echo "largefiles =" >> $HGRCPATH
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30
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31 $ hg init alice
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32 $ cd alice
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33 $ echo "this is a very big file" > big
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34 $ hg add --large big
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35 $ hg commit --config extensions.criple=$TESTTMP/criple.py -m big
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36 abort: No space left on device
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37 [255]
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38
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39 The largefile is not created in .hg/largefiles:
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40
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41 $ ls .hg/largefiles
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42 dirstate
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43
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44 The user cache is not even created:
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45
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46 >>> import os; os.path.exists("$HOME/.cache/largefiles/")
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47 False
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48
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49 Make the commit with space on the device:
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50
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51 $ hg commit -m big
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52
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53 Now make a clone with a full disk, and make sure lfutil.link function
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54 makes copies instead of hardlinks:
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55
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56 $ cd ..
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57 $ hg --config extensions.criple=$TESTTMP/criple.py clone --pull alice bob
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58 requesting all changes
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59 adding changesets
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60 adding manifests
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61 adding file changes
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62 added 1 changesets with 1 changes to 1 files
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63 updating to branch default
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64 getting changed largefiles
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65 abort: No space left on device
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66 [255]
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67
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68 The largefile is not created in .hg/largefiles:
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69
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70 $ ls bob/.hg/largefiles
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71 dirstate