git-p4: add trap to kill p4d on test exit

Sometimes the "prove" test runner hangs on test exit because p4d is
still running. Add a trap to always kill "p4d" on test exit.

You can reproduce the problem by commenting "P4D_TIMEOUT" in
"lib-git-p4.sh" and running "prove ./t9800-git-p4-basic.sh".

Signed-off-by: Lars Schneider <[email protected]>
Signed-off-by: Jeff King <[email protected]>

Author: larsxschneider

t/lib-git-p4.sh

@@ -74,6 +74,15 @@ cli="$TRASH_DIRECTORY/cli"
 git="$TRASH_DIRECTORY/git"
 pidfile="$TRASH_DIRECTORY/p4d.pid"
 
+# Sometimes "prove" seems to hang on exit because p4d is still running
+cleanup() {
+	if test -f "$pidfile"
+	then
+		kill -9 $(cat "$pidfile") 2>/dev/null && exit 255
+	fi
+}
+trap cleanup EXIT
+
 # git p4 submit generates a temp file, which will
 # not get cleaned up if the submission fails.  Don't
 # clutter up /tmp on the test machine.