Mercurial > hg
annotate tests/test-largefiles-small-disk.t @ 31987:8823daaf4665
obsolescence: add test for the "branch replacement" logic during push, case D2
Mercurial checks for the introduction of new heads on push. Evolution comes
into play to detect if existing branches on the server are being replaced by
some of the new one we push.
The current code for this logic is very basic (eg: issue4354) and was poorly
tested. We have a better implementation coming in the evolve extension fixing
these issues and with more serious tests coverage. In the process of upstreaming
this improved logic, we start with adding the test case that are already passing
with the current implementation. Once they are all in, we'll upstream the better
implementation and the extra test cases.
See inline documentation for details about the test case added in this
changeset.
author | Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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date | Thu, 13 Apr 2017 16:27:42 +0200 |
parents | 1ef37b16b8e8 |
children | 991134261057 |
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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 |