From bb2f4c1189e49508f7ce31e9bbd9f09efedad0ec Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@drexel.edu>
Date: Wed, 20 Oct 2010 15:23:16 -0400
Subject: [PATCH] Work around missing MPD with a more elaborate pysawsim
 nosetest hook.

---
 misc/hooks/README                    |  2 +-
 misc/hooks/pre-commit-pysawsim-check | 26 ++++++++++++++++++++++++++
 pysawsim/manager/mpi.py              |  2 +-
 3 files changed, 28 insertions(+), 2 deletions(-)
 create mode 100755 misc/hooks/pre-commit-pysawsim-check

diff --git a/misc/hooks/README b/misc/hooks/README
index 801e479..d86fa9f 100644
--- a/misc/hooks/README
+++ b/misc/hooks/README
@@ -8,5 +8,5 @@ See the `Git Community Book`_ for details.
 #!/bin/sh
 ./misc/hooks/pre-commit-diff-check || exit 1    # check patch formatting
 make check || exit 1                            # check sawsim execution
-nosetests --with-doctest --doctest-tests pysawsim || exit 1
+./misc/hooks/pre-commit-pysawsim-check || exit 1
 </file>
diff --git a/misc/hooks/pre-commit-pysawsim-check b/misc/hooks/pre-commit-pysawsim-check
new file mode 100755
index 0000000..66a409d
--- /dev/null
+++ b/misc/hooks/pre-commit-pysawsim-check
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+HAS_MPD=$(which mpdallexit 2>/dev/null)
+
+if [ -n "$HAS_MPD" ]; then
+
+    LOCAL_MPD=''
+
+    mpdtrace >/dev/null 2>&1
+    if [ "$?" != 0 ]; then
+	LOCAL_MPD='1'
+	mpd &    # start an mpd instance
+	sleep 1  # give mpd some time to start up
+    fi           # otherwise there is an mpd instance already running
+
+    mpiexec -n 1 nosetests --with-doctest --doctest-tests pysawsim || exit 1
+
+    if [ -n "$LOCAL_MPD" ]; then
+	mpdallexit
+    fi
+
+else  # no MPD
+
+    nosetests --with-doctest --doctest-tests pysawsim || exit 1
+
+fi
diff --git a/pysawsim/manager/mpi.py b/pysawsim/manager/mpi.py
index d99f415..0f1b0f8 100644
--- a/pysawsim/manager/mpi.py
+++ b/pysawsim/manager/mpi.py
@@ -207,7 +207,7 @@ class MPIManager (ThreadManager):
                 ])
         if worker_pool == None:
             worker_pool = MPI.COMM_WORLD.Get_size()
-        comm = MPI.COMM_SELF.Spawn(
+        comm = MPI.COMM_SELF.Spawn(  # locks with mpich2 if no mpd running
             sys.executable, args=['-c', spawn_script], maxprocs=worker_pool)
         rank = comm.Get_rank()
         assert rank == 0, rank
-- 
2.26.2