Mercurial > hg
view tests/test-dirstate-race2.t @ 47682:78f7f0d490ee
dirstate-v2: Move fixed-size tree metadata into the docket file
Before this changeset, the dirstate-v2 data file contained not only nodes
and paths that may be reused when appending to an existing file,
but also some fixed-size metadata that applies to the entire tree
and was added at the end of the data file for every append.
This moves that metadata into the docket file, so that repeated "append"
operations without meaningful changes don’t actually need to grow any file.
Differential Revision: https://phab.mercurial-scm.org/D11098
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Thu, 15 Jul 2021 23:02:17 +0200 |
parents | 6763913fa175 |
children | bf8837e3d7ce |
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#testcases dirstate-v1 dirstate-v1-tree dirstate-v2 #if dirstate-v1-tree #require rust $ echo '[experimental]' >> $HGRCPATH $ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH #endif #if dirstate-v2 #require rust $ echo '[format]' >> $HGRCPATH $ echo 'exp-dirstate-v2=1' >> $HGRCPATH #endif Checking the size/permissions/file-type of files stored in the dirstate after an update where the files are changed concurrently outside of hg's control. $ hg init repo $ cd repo $ echo a > a $ hg commit -qAm _ $ echo aa > a $ hg commit -m _ $ hg debugdirstate --no-dates n 644 3 (set |unset) a (re) $ cat >> $TESTTMP/dirstaterace.py << EOF > from mercurial import ( > extensions, > merge, > ) > def extsetup(ui): > extensions.wrapfunction(merge, 'applyupdates', wrap) > def wrap(orig, *args, **kwargs): > res = orig(*args, **kwargs) > with open("a", "w"): > pass # just truncate the file > return res > EOF Do an update where file 'a' is changed between hg writing it to disk and hg writing the dirstate. The dirstate is correct nonetheless, and so hg status correctly shows a as clean. $ hg up -r 0 --config extensions.race=$TESTTMP/dirstaterace.py 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg debugdirstate --no-dates n 644 2 (set |unset) a (re) $ echo a > a; hg status; hg diff