tests/test-transaction-rollback-on-sigpipe.t
author Pierre-Yves David <pierre-yves.david@octobus.net>
Fri, 02 Jul 2021 20:20:37 +0200
changeset 47557 ed81f2be5527
parent 47556 640fdb7fd67b
child 47588 eb611ecb435c
permissions -rw-r--r--
test: use a python script in `test-transaction-rollback-on-sigpipe.t` This still does not work on Windows, but at least this is a python script now. Differential Revision: https://phab.mercurial-scm.org/D10947
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Test that, when an hg push is interrupted and the remote side receives SIGPIPE,
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the remote hg is able to successfully roll back the transaction.
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  $ hg init -q remote
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  $ hg clone -e "\"$PYTHON\" \"$RUNTESTDIR/dummyssh\"" -q ssh://user@dummy/`pwd`/remote local
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  $ SIGPIPE_REMOTE_DEBUG_FILE="$TESTTMP/DEBUGFILE"
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  $ SYNCFILE1="$TESTTMP/SYNCFILE1"
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  $ SYNCFILE2="$TESTTMP/SYNCFILE2"
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  $ export SIGPIPE_REMOTE_DEBUG_FILE
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  $ export SYNCFILE1
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  $ export SYNCFILE2
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  $ PYTHONUNBUFFERED=1
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  $ export PYTHONUNBUFFERED
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On the remote end, run hg, piping stdout and stderr through processes that we
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know the PIDs of. We will later kill these to simulate an ssh client
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disconnecting.
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  $ remotecmd="$RUNTESTDIR/testlib/sigpipe-remote.py"
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In the pretxnchangegroup hook, kill the PIDs recorded above to simulate ssh
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disconnecting. Then exit nonzero, to force a transaction rollback.
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  $ cat >remote/.hg/hgrc <<EOF
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  > [hooks]
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  > pretxnchangegroup.00-break-things="$RUNTESTDIR/testlib/wait-on-file" 10 "$SYNCFILE2" "$SYNCFILE1"
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  > pretxnchangegroup.01-output-things=echo "some remote output to be forward to the closed pipe"
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  > EOF
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  $ hg --cwd ./remote tip -T '{node|short}\n'
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  000000000000
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  $ cd local
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  $ echo foo > foo ; hg commit -qAm "commit"
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  $ hg push -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" --remotecmd "$remotecmd"
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  pushing to ssh://user@dummy/$TESTTMP/remote
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  searching for changes
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  remote: adding changesets
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  remote: adding manifests
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  remote: adding file changes
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  abort: stream ended unexpectedly (got 0 bytes, expected 4)
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  [255]
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  $ cat $SIGPIPE_REMOTE_DEBUG_FILE
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  SIGPIPE-HELPER: Starting
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  SIGPIPE-HELPER: Mercurial started
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  SIGPIPE-HELPER: Redirection in place
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  SIGPIPE-HELPER: SYNCFILE1 detected
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  SIGPIPE-HELPER: pipes closed
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  SIGPIPE-HELPER: creating SYNCFILE2
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  SIGPIPE-HELPER: Shutting down
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  SIGPIPE-HELPER: Server process terminated
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  SIGPIPE-HELPER: Shut down
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The remote should be left in a good state
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  $ hg --cwd ../remote tip -T '{node|short}\n'
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  000000000000
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  $ hg --cwd ../remote recover
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  no interrupted transaction available
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  [1]