Mercurial > hg
view tests/test-transaction-rollback-on-revlog-split.t @ 48851:d739cd69bb6a
revlog: return 0 for the fast_rank of nullrev
By convention, the rank of the null revision is 0. This particular revision is
never "physically" stored in the changelog, so it is a special case.
For consistency, the value `None` is still being returned for revlogs which do
not store the fast_rank property for any revision.
Differential Revision: https://phab.mercurial-scm.org/D12208
author | pacien <pacien.trangirard@pacien.net> |
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date | Mon, 21 Feb 2022 15:53:03 +0100 |
parents | ccd9cb73125c |
children | e2ba2234bf1c |
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Test correctness of revlog inline -> non-inline transition ---------------------------------------------------------- Helper extension to intercept renames. $ cat > $TESTTMP/intercept_rename.py << EOF > import os > import sys > from mercurial import extensions, util > > def extsetup(ui): > def close(orig, *args, **kwargs): > path = util.normpath(args[0]._atomictempfile__name) > if path.endswith(b'/.hg/store/data/file.i'): > os._exit(80) > return orig(*args, **kwargs) > extensions.wrapfunction(util.atomictempfile, 'close', close) > EOF Test offset computation to correctly factor in the index entries themselves. Also test that the new data size has the correct size if the transaction is aborted after the index has been replaced. Test repo has commits a, b, c, D, where D is large (grows the revlog enough that it transitions to non-inline storage). The clone initially has changes a, b and will transition to non-inline storage when adding c, D. If the transaction adding c, D is rolled back, then we don't undo the revlog split, but truncate the index and the data to remove both c and D. $ hg init troffset-computation --config format.revlog-compression=none $ cd troffset-computation $ printf '%20d' '1' > file $ hg commit -Aqma $ printf '%1024d' '1' > file $ hg commit -Aqmb $ printf '%20d' '1' > file $ hg commit -Aqmc $ dd if=/dev/zero of=file bs=1k count=128 > /dev/null 2>&1 $ hg commit -AqmD $ cd .. $ hg clone -r 1 troffset-computation troffset-computation-copy --config format.revlog-compression=none -q $ cd troffset-computation-copy Reference size: $ f -s .hg/store/data/file* .hg/store/data/file.i: size=1174 $ cat > .hg/hgrc <<EOF > [hooks] > pretxnchangegroup = python:$TESTDIR/helper-killhook.py:killme > EOF #if chg $ hg pull ../troffset-computation pulling from ../troffset-computation [255] #else $ hg pull ../troffset-computation pulling from ../troffset-computation [80] #endif $ cat .hg/store/journal | tr -s '\000' ' ' | grep data/file | tail -1 data/file.i 128 The first file.i entry should match the "Reference size" above. The first file.d entry is the temporary record during the split, the second entry after the split happened. The sum of the second file.d and the second file.i entry should match the first file.i entry. $ cat .hg/store/journal | tr -s '\000' ' ' | grep data/file data/file.i 1174 data/file.d 0 data/file.d 1046 data/file.i 128 $ hg recover rolling back interrupted transaction (verify step skipped, run `hg verify` to check your repository content) $ f -s .hg/store/data/file* .hg/store/data/file.d: size=1046 .hg/store/data/file.i: size=128 $ hg tip changeset: 1:cfa8d6e60429 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: b $ hg verify -q warning: revlog 'data/file.d' not in fncache! 1 warnings encountered! hint: run "hg debugrebuildfncache" to recover from corrupt fncache $ hg debugrebuildfncache --only-data adding data/file.d 1 items added, 0 removed from fncache $ hg verify -q $ cd .. Now retry the procedure but intercept the rename of the index and check that the journal does not contain the new index size. This demonstrates the edge case where the data file is left as garbage. $ hg clone -r 1 troffset-computation troffset-computation-copy2 --config format.revlog-compression=none -q $ cd troffset-computation-copy2 $ cat > .hg/hgrc <<EOF > [extensions] > intercept_rename = $TESTTMP/intercept_rename.py > [hooks] > pretxnchangegroup = python:$TESTDIR/helper-killhook.py:killme > EOF #if chg $ hg pull ../troffset-computation pulling from ../troffset-computation [255] #else $ hg pull ../troffset-computation pulling from ../troffset-computation [80] #endif $ cat .hg/store/journal | tr -s '\000' ' ' | grep data/file data/file.i 1174 data/file.d 0 data/file.d 1046 $ hg recover rolling back interrupted transaction (verify step skipped, run `hg verify` to check your repository content) $ f -s .hg/store/data/file* .hg/store/data/file.d: size=1046 .hg/store/data/file.i: size=1174 $ hg tip changeset: 1:cfa8d6e60429 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: b $ hg verify -q $ cd .. Repeat the original test but let hg rollback the transaction. $ hg clone -r 1 troffset-computation troffset-computation-copy-rb --config format.revlog-compression=none -q $ cd troffset-computation-copy-rb $ cat > .hg/hgrc <<EOF > [hooks] > pretxnchangegroup = false > EOF $ hg pull ../troffset-computation pulling from ../troffset-computation searching for changes adding changesets adding manifests adding file changes transaction abort! rollback completed abort: pretxnchangegroup hook exited with status 1 [40] $ f -s .hg/store/data/file* .hg/store/data/file.d: size=1046 .hg/store/data/file.i: size=128 $ hg tip changeset: 1:cfa8d6e60429 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: b $ hg verify -q warning: revlog 'data/file.d' not in fncache! 1 warnings encountered! hint: run "hg debugrebuildfncache" to recover from corrupt fncache $ cd ..