annotate tests/test-largefiles-small-disk.t @ 25591:f1d46075b13a

verify: check the subrepository references in .hgsubstate While hopefully atypical, there are reasons that a subrepository revision can be lost that aren't covered by corruption of the .hgsubstate revlog. Such things can happen when a subrepo is amended, stripped or simply isn't pulled from upstream because the parent repo revision wasn't updated yet. There's no way to know if it is an error, but this will find potential problems sooner than when some random revision is updated. Until recently, convert made no attempt at rewriting the .hgsubstate file. The impetuous for this is to verify the conversion of some repositories, and this is orders of magnitude faster than a bash script from 0..tip that does an 'hg update -C $rev'. But it is equally useful to determine if everything has been pulled down before taking a thumb drive on the go. It feels somewhat wrong to leave this out of verifymod (mostly because the file is already read in there, and the final summary is printed before the subrepos are checked). But verifymod looks very low level, so importing subrepo stuff there seems more wrong.
author Matt Harbison <matt_harbison@yahoo.com>
date Tue, 16 Jun 2015 16:15:15 -0400
parents 8a021cd38719
children 7356e6b1f5b8
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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 > #
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19 > def oslink(src, dest):
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20 > raise OSError("no hardlinks, try copying instead")
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21 > util.oslink = oslink
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22 > EOF
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23
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24 $ echo "[extensions]" >> $HGRCPATH
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25 $ echo "largefiles =" >> $HGRCPATH
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27 $ hg init alice
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28 $ cd alice
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29 $ echo "this is a very big file" > big
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30 $ hg add --large big
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31 $ hg commit --config extensions.criple=$TESTTMP/criple.py -m big
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32 abort: No space left on device
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33 [255]
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35 The largefile is not created in .hg/largefiles:
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36
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37 $ ls .hg/largefiles
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38 dirstate
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40 The user cache is not even created:
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41
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42 >>> import os; os.path.exists("$HOME/.cache/largefiles/")
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43 False
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44
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45 Make the commit with space on the device:
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46
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47 $ hg commit -m big
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48
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49 Now make a clone with a full disk, and make sure lfutil.link function
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50 makes copies instead of hardlinks:
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51
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52 $ cd ..
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53 $ hg --config extensions.criple=$TESTTMP/criple.py clone --pull alice bob
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54 requesting all changes
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55 adding changesets
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56 adding manifests
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57 adding file changes
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58 added 1 changesets with 1 changes to 1 files
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59 updating to branch default
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60 getting changed largefiles
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61 abort: No space left on device
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62 [255]
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63
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64 The largefile is not created in .hg/largefiles:
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65
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66 $ ls bob/.hg/largefiles
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67 dirstate