Mercurial > hg
view tests/test-transaction-safety.t @ 51316:178e50edb4f8
changelog: stop useless enforcing split at the end of transaction
Changelogs are no longer created inline, and existing changelogs are
automatically split. Since we now enforce splitting at the start of any write,
we don't need to enforce splitting at the end of the transaction.
This has the nice side effect of killing the only user of "side_write".
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Thu, 11 Jan 2024 16:35:52 +0100 |
parents | 2e0b2a387502 |
children |
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Test transaction safety ======================= #testcases revlogv1 revlogv2 changelogv2 #if revlogv1 $ cat << EOF >> $HGRCPATH > [experimental] > revlogv2=no > EOF #endif #if revlogv2 $ cat << EOF >> $HGRCPATH > [experimental] > revlogv2=enable-unstable-format-and-corrupt-my-data > EOF #endif #if changelogv2 $ cat << EOF >> $HGRCPATH > [format] > exp-use-changelog-v2=enable-unstable-format-and-corrupt-my-data > EOF #endif This test basic case to make sure external process do not see transaction content until it is committed. # TODO: also add an external reader accessing revlog files while they are written # (instead of during transaction finalisation) # TODO: also add stream clone and hardlink clone happening during these transaction. setup ----- synchronisation+output script using the following schedule: [A1] "external" is started [A2] "external" waits on EXT_UNLOCK [A2] "external" + creates EXT_WAITING → unlocks [C1] [B1] "hg commit/pull" is started [B2] "hg commit/pull" is ready to be committed [B3] "hg commit/pull" spawn "internal" using a pretxnclose hook (need [C4]) [C1] "internal" waits on EXT_WAITING (need [A2]) [C2] "internal" creates EXT_UNLOCK → unlocks [A2] [C3] "internal" show the tipmost revision (inside of the transaction) [C4] "internal" waits on EXT_DONE (need [A4]) [A3] "external" show the tipmost revision (outside of the transaction) [A4] "external" creates EXT_DONE → unlocks [C4] [C5] "internal" end of execution -> unlock [B3] [B4] "hg commit/pull" transaction is committed on disk $ mkdir sync $ mkdir output $ mkdir script $ HG_TEST_FILE_EXT_WAITING=$TESTTMP/sync/ext_waiting $ export HG_TEST_FILE_EXT_WAITING $ HG_TEST_FILE_EXT_UNLOCK=$TESTTMP/sync/ext_unlock $ export HG_TEST_FILE_EXT_UNLOCK $ HG_TEST_FILE_EXT_DONE=$TESTTMP/sync/ext_done $ export HG_TEST_FILE_EXT_DONE $ cat << EOF > script/external.sh > #!/bin/sh > "$RUNTESTDIR/testlib/wait-on-file" 5 "$HG_TEST_FILE_EXT_UNLOCK" "$HG_TEST_FILE_EXT_WAITING" > hg log --rev 'tip' -T 'external: {rev} {desc}\n' > "$TESTTMP/output/external.out" > touch "$HG_TEST_FILE_EXT_DONE" > EOF $ cat << EOF > script/internal.sh > #!/bin/sh > "$RUNTESTDIR/testlib/wait-on-file" 5 "$HG_TEST_FILE_EXT_WAITING" > touch "$HG_TEST_FILE_EXT_UNLOCK" > hg log --rev 'tip' -T 'internal: {rev} {desc}\n' > "$TESTTMP/output/internal.out" > "$RUNTESTDIR/testlib/wait-on-file" 5 "$HG_TEST_FILE_EXT_DONE" > EOF Automated commands: $ make_one_commit() { > rm -f $TESTTMP/sync/* > rm -f $TESTTMP/output/* > hg log --rev 'tip' -T 'pre-commit: {rev} {desc}\n' > echo x >> of > sh $TESTTMP/script/external.sh & hg commit -m "$1" > cat $TESTTMP/output/external.out > cat $TESTTMP/output/internal.out > hg log --rev 'tip' -T 'post-tr: {rev} {desc}\n' > } $ make_one_pull() { > rm -f $TESTTMP/sync/* > rm -f $TESTTMP/output/* > hg log --rev 'tip' -T 'pre-commit: {rev} {desc}\n' > echo x >> of > sh $TESTTMP/script/external.sh & hg pull ../other-repo/ --rev "$1" --force --quiet > cat $TESTTMP/output/external.out > cat $TESTTMP/output/internal.out > hg log --rev 'tip' -T 'post-tr: {rev} {desc}\n' > } prepare a large source to which to pull from: The source is large to unsure we don't use inline more after the pull $ hg init other-repo $ hg -R other-repo debugbuilddag .+500 --overwritten-file prepare an empty repository where to make test: $ hg init repo $ cd repo $ touch of $ hg add of prepare a small extension to controll inline size $ mkdir $TESTTMP/ext $ cat << EOF > $TESTTMP/ext/small_inline.py > from mercurial import revlog > revlog._maxinline = 3 * 100 > EOF $ cat << EOF >> $HGRCPATH > [extensions] > small_inline=$TESTTMP/ext/small_inline.py > [hooks] > pretxnclose = sh $TESTTMP/script/internal.sh > EOF check this is true for the initial commit (inline → inline) ----------------------------------------------------------- the repository should still be inline (for relevant format) $ make_one_commit first pre-commit: -1 external: -1 internal: 0 first post-tr: 0 first #if revlogv1 $ hg debugrevlog of | grep inline flags : inline, * (glob) #endif check this is true for extra commit (inline → inline) ----------------------------------------------------- the repository should still be inline (for relevant format) #if revlogv1 $ hg debugrevlog of | grep inline flags : inline, * (glob) #endif $ make_one_commit second pre-commit: 0 first external: 0 first internal: 1 second post-tr: 1 second #if revlogv1 $ hg debugrevlog of | grep inline flags : inline, * (glob) #endif check this is true for a small pull (inline → inline) ----------------------------------------------------- the repository should still be inline (for relevant format) #if revlogv1 $ hg debugrevlog of | grep inline flags : inline, * (glob) #endif $ make_one_pull 3 pre-commit: 1 second warning: repository is unrelated external: 1 second internal: 5 r3 post-tr: 5 r3 #if revlogv1 $ hg debugrevlog of | grep inline flags : inline, * (glob) #endif Make a large pull (inline → no-inline) --------------------------------------- the repository should no longer be inline (for relevant format) #if revlogv1 $ hg debugrevlog of | grep inline flags : inline, * (glob) #endif $ make_one_pull 400 pre-commit: 5 r3 external: 5 r3 internal: 402 r400 post-tr: 402 r400 #if revlogv1 $ hg debugrevlog of | grep inline [1] #endif check this is true for extra commit (no-inline → no-inline) ----------------------------------------------------------- the repository should no longer be inline (for relevant format) #if revlogv1 $ hg debugrevlog of | grep inline [1] #endif $ make_one_commit third pre-commit: 402 r400 external: 402 r400 internal: 403 third post-tr: 403 third #if revlogv1 $ hg debugrevlog of | grep inline [1] #endif Make a pull (not-inline → no-inline) ------------------------------------- the repository should no longer be inline (for relevant format) #if revlogv1 $ hg debugrevlog of | grep inline [1] #endif $ make_one_pull tip pre-commit: 403 third external: 403 third internal: 503 r500 post-tr: 503 r500 #if revlogv1 $ hg debugrevlog of | grep inline [1] #endif