test-sigpipe: run the hook using `sh`

This make the hook properly run on Windows.

Differential Revision: https://phab.mercurial-scm.org/D11084

tests/test-transaction-rollback-on-sigpipe.t

@@ -1,62 +1,62
 Test that, when an hg push is interrupted and the remote side receives SIGPIPE,
 the remote hg is able to successfully roll back the transaction.
 
   $ hg init -q remote
   $ hg clone -e "\"$PYTHON\" \"$RUNTESTDIR/dummyssh\"" -q ssh://user@dummy/`pwd`/remote local
   $ SIGPIPE_REMOTE_DEBUG_FILE="$TESTTMP/DEBUGFILE"
   $ SYNCFILE1="$TESTTMP/SYNCFILE1"
   $ SYNCFILE2="$TESTTMP/SYNCFILE2"
   $ export SIGPIPE_REMOTE_DEBUG_FILE
   $ export SYNCFILE1
   $ export SYNCFILE2
   $ PYTHONUNBUFFERED=1
   $ export PYTHONUNBUFFERED
 
 On the remote end, run hg, piping stdout and stderr through processes that we
 know the PIDs of. We will later kill these to simulate an ssh client
 disconnecting.
 
   $ remotecmd="$RUNTESTDIR/testlib/sigpipe-remote.py"
 
 In the pretxnchangegroup hook, kill the PIDs recorded above to simulate ssh
 disconnecting. Then exit nonzero, to force a transaction rollback.
 
 
   $ cat >remote/.hg/hgrc <<EOF
   > [hooks]
-  > pretxnchangegroup.00-break-things="$RUNTESTDIR/testlib/wait-on-file" 10 "$SYNCFILE2" "$SYNCFILE1"
+  > pretxnchangegroup.00-break-things=sh "$RUNTESTDIR/testlib/wait-on-file" 10 "$SYNCFILE2" "$SYNCFILE1"
   > pretxnchangegroup.01-output-things=echo "some remote output to be forward to the closed pipe"
   > EOF
 
   $ hg --cwd ./remote tip -T '{node|short}\n'
   000000000000
   $ cd local
   $ echo foo > foo ; hg commit -qAm "commit"
   $ hg push -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" --remotecmd "$remotecmd"
   pushing to ssh://user@dummy/$TESTTMP/remote
   searching for changes
   remote: adding changesets (py3 !)
   remote: adding manifests (py3 !)
   remote: adding file changes (py3 !)
   remote: adding changesets (no-py3 no-chg !)
   remote: adding manifests (no-py3 no-chg !)
   remote: adding file changes (no-py3 no-chg !)
   abort: stream ended unexpectedly (got 0 bytes, expected 4)
   [255]
   $ cat $SIGPIPE_REMOTE_DEBUG_FILE
   SIGPIPE-HELPER: Starting
   SIGPIPE-HELPER: Mercurial started
   SIGPIPE-HELPER: Redirection in place
   SIGPIPE-HELPER: SYNCFILE1 detected
   SIGPIPE-HELPER: pipes closed
   SIGPIPE-HELPER: creating SYNCFILE2
   SIGPIPE-HELPER: Shutting down
   SIGPIPE-HELPER: Server process terminated
   SIGPIPE-HELPER: Shut down
 
 The remote should be left in a good state
   $ hg --cwd ../remote tip -T '{node|short}\n'
   000000000000
   $ hg --cwd ../remote recover
   no interrupted transaction available
   [1]