gstlal_segments_operations: fix default output name and add useful verbosity

gstlal-ugly/bin/gstlal_segments_operations

@@ -40,7 +40,7 @@ def parse_command_line():
 	parser.add_option("--intersection", action = "store_true", help = "intersection of --segment-name1 in segment-file1 and --segment-name2 in segment-file2")
 	parser.add_option("--union", action = "store_true", help = "union of --segment-name1 in segment-file1 and --segment-name2 in segment-file2")
 	parser.add_option("--diff", action = "store_true", help = "diff of --segment-name1 in segment-file1 and --segment-name2 in segment-file2")
-	parser.add_option("--output-file", metavar = "file", default = ".", help = "Set the name of the output file")
+	parser.add_option("--output-file", metavar = "file", help = "Set the name of the output file")
 	parser.add_option("--output-segment-name", metavar = "name", default = "datasegments", help = "Set the name of output segments default datasegments")
 	parser.add_option("-v", "--verbose", action = "store_true", help = "Be verbose.")
 	options, filenames = parser.parse_args()
@@ -59,6 +59,12 @@ def extract_segs(fname, segname):
 segs1 = extract_segs(options.segment_file1, options.segment_name1)
 segs2 = extract_segs(options.segment_file2, options.segment_name2)
 
+if options.verbose:
+	print "segs 1 live time: ", abs(segs1) 
+	print "segs 2 live time: ", abs(segs2) 
+	print "two or more detectors on segs1: ", abs(segmentsUtils.vote(segs1.values(), 2))
+	print "two or more detectors on segs2: ", abs(segmentsUtils.vote(segs2.values(), 2))
+
 if options.diff:
 	segs = segs1 - segs2
 if options.intersection:
@@ -66,17 +72,21 @@ if options.intersection:
 if options.union:
 	segs = segs1 | segs2
 
-xmldoc = ligolw.Document()
-xmldoc.appendChild(ligolw.LIGO_LW())
+if options.verbose:
+	print "segs  live time: ", abs(segs) 
+	print "two or more detectors on segs: ", abs(segmentsUtils.vote(segs.values(), 2))
 
-process = ligolw_process.register_to_xmldoc(xmldoc, sys.argv[0], options.__dict__)
-ligolw_process.set_process_end_time(process)
+if options.output_file:
+	xmldoc = ligolw.Document()
+	xmldoc.appendChild(ligolw.LIGO_LW())
 
-lwseglists = ligolw_segments.LigolwSegments(xmldoc)
-lwseglists.insert_from_segmentlistdict(segs, options.output_segment_name)
-lwseglists.optimize()
-lwseglists.finalize(process)
+	process = ligolw_process.register_to_xmldoc(xmldoc, sys.argv[0], options.__dict__)
+	ligolw_process.set_process_end_time(process)
 
+	lwseglists = ligolw_segments.LigolwSegments(xmldoc)
+	lwseglists.insert_from_segmentlistdict(segs, options.output_segment_name)
+	lwseglists.optimize()
+	lwseglists.finalize(process)
 
-ligolw_utils.write_filename(xmldoc, options.output_file, verbose = options.verbose, gz = options.output_file.endswith('.gz'))
+	ligolw_utils.write_filename(xmldoc, options.output_file, verbose = options.verbose, gz = options.output_file.endswith('.gz'))