1 files changed, 66 insertions, 7 deletions
diff --git a/tools/merge b/tools/merge
index b5a50d5..4ba0438 100755
--- a/tools/merge
+++ b/tools/merge
@@ -1,10 +1,69 @@
-#! /bin/sh
+#! /usr/bin/env python
+"""merge"""
 
-set -o errexit
+import os
+import sys
+import signal
+from time import sleep
+from mergetools import parse_args, terminate_child_procs
+from multiprocessing import Process
+import merge_fetch, merge_backup, merge_sth, merge_dist
 
-BINDIR=$(dirname $0)
+def run_once():
+    """Merge once."""
+    ret = merge_fetch.main()
+    if ret == 0:
+        ret = merge_backup.main()
+    if ret == 0:
+        ret = merge_sth.main()
+    if ret == 0:
+        ret = merge_dist.main()
+    return ret
 
-$BINDIR/merge_fetch.py "$@"
-$BINDIR/merge_backup.py "$@"
-$BINDIR/merge_sth.py "$@"
-$BINDIR/merge_dist.py "$@"
+def term(signal, arg):
+    terminate_child_procs()
+    sys.exit(1)
+
+def run_continuously(pidfilepath):
+    """Run continuously."""
+    parts = (('fetch', merge_fetch),
+             ('backup', merge_backup),
+             ('sth', merge_sth),
+             ('dist', merge_dist))
+    procs = {}
+    for part, mod in parts:
+        procs[part] = Process(target=mod.main, name='merge_%s' % part)
+        procs[part].start()
+        #print >>sys.stderr, "DEBUG:", part, "started, pid", procs[part].pid
+
+    if pidfilepath:
+        open(pidfilepath, 'w').write(str(os.getpid()) + '\n')
+
+    signal.signal(signal.SIGTERM, term)
+    retval = 0
+    keep_going = True
+    while keep_going:
+        sleep(1)
+        for name, p in procs.items():
+            if not p.is_alive():
+                print >>sys.stderr, "\nERROR:", name, "process is gone; exiting"
+                retval = 1                # Fail.
+                keep_going = False
+                break
+
+    terminate_child_procs()
+    return retval
+
+def main():
+    """Main"""
+    args, _, _ = parse_args()
+
+    if args.mergeinterval is None:
+        ret = run_once()
+    else:
+        ret = run_continuously(args.pidfile)
+
+    return ret
+
+if __name__ == '__main__':
+    sys.exit(main())