Convert scripts to entry_points

This MR converts all of the scripts previously managed in bin/ into entry points constructed from code now managed as modules in the new dqsegdb.tools subpackage.

Using entry points rather than scripts has a few advantages

• much easier to test functions in the code independently of the whole
• much easier to measure coverage
• entry points are more portable (easier to install on non-Unix platforms, for example)
• allows for a noarch: python conda package (niche benefit)

This should have no impact on the functionality or usability of any of the current scripts.

dqsegdb/tools/ligolw_dq_query.py

@@ -77,7 +77,7 @@ __verbose_msg__ = "version: " + get_versions()['version'] + "\nfull-revisionid:
 #
 
 
-def parse_command_line():
+def parse_command_line(args=None):
     """
     Parse the command line, return an options object
     """
@@ -106,7 +106,7 @@ def parse_command_line():
     parser.add_option("-f", "--tom-formatting", action = "store_true", help = "Tom Dent requested formatting option: condensed output into single lines.")
     parser.add_option("-b", "--seperate-good-from-bad", action = "store_true", help = "Seperates flags marked by the database as being active when the ifo is in a bad state from those that are active when the ifo is in a good state.")
 
-    options, time = parser.parse_args()
+    options, time = parser.parse_args(args=args)
 
     # Make sure we have required arguments
     if options.segment_url:
@@ -291,8 +291,9 @@ def get_full_name(ifo, name, version):
 # =============================================================================
 #
 
-if __name__ == '__main__':
-    options, database_location, time  = parse_command_line()
+
+def main(args=None):
+    options, database_location, time  = parse_command_line(args=args)
 
     o=urlparse(options.segment_url)
     protocol=o.scheme
@@ -474,4 +475,5 @@ if __name__ == '__main__':
         fh.close()
 
 
-
+if __name__ == "__main__":
+    sys.exit(main())