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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 -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=sh "$RUNTESTDIR/testlib/wait-on-file" 10 "$SYNCFILE2" "$SYNCFILE1"
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> pretxnchangegroup.01-output-things=echo "some remote output to be forward to the closed pipe"
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> pretxnchangegroup.02-output-things=echo "some more remote output"
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> EOF
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$ 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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(use quiet to avoid flacky output from the server)
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$ hg push --quiet --remotecmd "$remotecmd"
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abort: stream ended unexpectedly (got 0 bytes, expected 4)
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[255]
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$ cat $SIGPIPE_REMOTE_DEBUG_FILE
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SIGPIPE-HELPER: Starting
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SIGPIPE-HELPER: Redirection in place
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SIGPIPE-HELPER: pipes closed in main
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SIGPIPE-HELPER: SYNCFILE1 detected
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SIGPIPE-HELPER: worker killed
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SIGPIPE-HELPER: creating SYNCFILE2
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SIGPIPE-HELPER: Shutting down
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SIGPIPE-HELPER: Server process terminated with status 255 (no-windows !)
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|
SIGPIPE-HELPER: Server process terminated with status 1 (windows !)
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SIGPIPE-HELPER: Shut down
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The remote should be left in a good state
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$ hg --cwd ../remote tip -T '{node|short}\n'
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000000000000
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#if windows
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|
XXX-Windows Broken behavior to be fixed
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Behavior on Windows is broken and should be fixed. However this is a fairly
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|
corner case situation and no data are being corrupted. This would affect
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central repository being hosted on a Windows machine and accessed using ssh.
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This was catch as we setup new CI for Windows. Making the test pass on Windows
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|
was enough of a pain that fixing the behavior set aside for now. Dear and
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|
honorable reader, feel free to fix it.
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|
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|
$ hg --cwd ../remote recover
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|
|
rolling back interrupted transaction
|
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|
(verify step skipped, run `hg verify` to check your repository content)
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|
#else
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|
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|
$ hg --cwd ../remote recover
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|
no interrupted transaction available
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|
[1]
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#endif
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