Refactor cqlshmain global constants

patch by Brad Schoening; reviewed by Stefan Miklosovic and Brandon Williams for CASSANDRA-19201

CHANGES.txt

@@ -1,4 +1,5 @@
 5.1
+ * Refactor cqlshmain global constants (CASSANDRA-19201)
  * Remove native_transport_port_ssl (CASSANDRA-19397)
  * Make nodetool reconfigurecms sync by default and add --cancel to be able to cancel ongoing reconfigurations (CASSANDRA-19216)
  * Expose auth mode in system_views.clients, nodetool clientstats, metrics (CASSANDRA-19366)

pylib/cqlshlib/cqlshhandling.py

@@ -16,7 +16,7 @@
 
 import os
 
-from cqlshlib import cqlhandling
+from cqlshlib import cqlhandling, cql3handling
 
 # we want the cql parser to understand our cqlsh-specific commands too
 my_commands_ending_with_newline = (
@@ -251,6 +251,18 @@ def registrator(f):
     cqlsh_question_mark
 
 
+def get_cqlshruleset():
+    cqlruleset = cql3handling.CqlRuleSet
+    cqlruleset.append_rules(cqlsh_extra_syntax_rules)
+    for rulename, termname, func in cqlsh_syntax_completers:
+        cqlruleset.completer_for(rulename, termname)(func)
+    cqlruleset.commands_end_with_newline.update(my_commands_ending_with_newline)
+    return cqlruleset
+
+
+cqlshruleset = get_cqlshruleset()
+
+
 def complete_source_quoted_filename(ctxt, cqlsh):
     partial_path = ctxt.get_binding('partial', '')
     head, tail = os.path.split(partial_path)