tests/test-dirstate-race2.t
author Pierre-Yves David <pierre-yves.david@octobus.net>
Fri, 15 Oct 2021 01:27:39 +0200
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parent 48223 b4f83c9e7905
child 48295 bf11ff22a9af
permissions -rw-r--r--
dirstate-v2: add an option to prevent unintentional slow dirstate-v2 This is the project policy discussed in November 2020 and already put to use for the persistent nodemap. Differential Revision: https://phab.mercurial-scm.org/D11668
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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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  > exp-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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  $ 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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  > from mercurial import (
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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)
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  > def wrap(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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  >     return res
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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