tests/test-dirstate-race2.t
author Martin von Zweigbergk <martinvonz@google.com>
Thu, 31 Mar 2022 22:02:46 -0700
changeset 49061 81d293eb5264
parent 48681 e845537f6adb
permissions -rw-r--r--
rust-requirements: allow loading repos with `bookmarksinstore` requirement `rhg` does support bookmarks, so it can load repos with the `bookmarksinstore` requirement just as well as other repos. Differential Revision: https://phab.mercurial-scm.org/D12425
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#testcases dirstate-v1 dirstate-v2
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#if dirstate-v2
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  $ cat >> $HGRCPATH << EOF
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  > [format]
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  > use-dirstate-v2=1
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  > [storage]
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  > dirstate-v2.slow-path=allow
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  > EOF
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#endif
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Checking the size/permissions/file-type of files stored in the
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dirstate after an update where the files are changed concurrently
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outside of hg's control.
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  $ hg init repo
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  $ cd repo
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  $ echo a > a
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  $ hg commit -qAm _
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  $ echo aa > a
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  $ hg commit -m _
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# this sleep is there to ensure current time has -at-least- one second away
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# from the current time. It ensure the mtime is not ambiguous. If the test
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# "sleep" longer this will be fine.
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# It is not used to synchronise parallele operation so it is "fine" to use it.
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  $ sleep 1
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  $ hg status
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  $ hg debugdirstate --no-dates
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  n 644          3 (set  |unset)               a (re)
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  $ cat >> $TESTTMP/dirstaterace.py << EOF
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  > import time
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  > from mercurial import (
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  >     commit,
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  >     extensions,
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  >     merge,
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  > )
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  > def extsetup(ui):
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  >     extensions.wrapfunction(merge, 'applyupdates', wrap(0))
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  >     extensions.wrapfunction(commit, 'commitctx', wrap(1))
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  > def wrap(duration):
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  >     def new(orig, *args, **kwargs):
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  >         res = orig(*args, **kwargs)
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  >         with open("a", "w"):
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  >             pass # just truncate the file
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  >         time.sleep(duration)
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  >         return res
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  >     return new
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  > EOF
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Do an update where file 'a' is changed between hg writing it to disk
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and hg writing the dirstate. The dirstate is correct nonetheless, and
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so hg status correctly shows a as clean.
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  $ hg up -r 0 --config extensions.race=$TESTTMP/dirstaterace.py
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg debugdirstate --no-dates
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  n 644          2 (set  |unset)               a (re)
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  $ echo a > a; hg status; hg diff
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Do a commit where file 'a' is changed between hg committing its new
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revision into the repository, and the writing of the dirstate.
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This used to results in a corrupted dirstate (size did not match committed size).
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  $ echo aaa > a; hg commit -qm _
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  $ hg merge -qr 1; hg resolve -m; rm a.orig
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  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
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  (no more unresolved files)
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  $ cat a
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  <<<<<<< working copy: be46f74ce38d - test: _
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  aaa
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  =======
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  aa
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  >>>>>>> merge rev:    eb3fc6c17aa3 - test: _
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  $ hg debugdirstate --no-dates
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  m   0         -2 (set  |unset)               a (re)
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  $ hg commit -m _ --config extensions.race=$TESTTMP/dirstaterace.py
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  $ hg debugdirstate --no-dates
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  n   0         -1 unset               a
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  $ cat a | wc -c
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   *0 (re)
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  $ hg cat -r . a | wc -c
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   *105 (re)
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  $ hg status; hg diff --stat
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  M a
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   a |  5 -----
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   1 files changed, 0 insertions(+), 5 deletions(-)