Add test_aggregator_rules script to contrib

https://bugs.launchpad.net/graphite/+bug/893762

Author: mleinart

contrib/test_aggregator_rules.py

@@ -0,0 +1,43 @@
+import sys
+from os.path import dirname, join, abspath
+
+# Figure out where we're installed
+ROOT_DIR = dirname(dirname(abspath(__file__)))
+
+# Make sure that carbon's 'lib' dir is in the $PYTHONPATH if we're running from source.
+LIB_DIR = join(ROOT_DIR, 'graphite', 'lib')
+sys.path.insert(0, LIB_DIR)
+
+from carbon.aggregator.rules import RuleManager
+
+### Basic usage
+if len(sys.argv) != 3:
+  print "Usage: %s 'aggregator rule' 'line item'" % (__file__)
+  print "\nSample invocation: %s %s %s" % \
+    (__file__, "'<prefix>.<env>.<key>.sum.all (10) = sum <prefix>.<env>.<<key>>.sum.<node>'", 'stats.prod.js.ktime_sum.sum.host2' )
+  sys.exit(42)
+
+### cli arguments
+me, raw_rule, raw_metric = sys.argv
+
+
+### XXX rather whitebox, by reading the source ;(
+rm   = RuleManager
+rule = rm.parse_definition( raw_rule )
+
+### rule/parsed rule
+print "Raw rule: %s" % raw_rule
+print "Parsed rule: %s" % rule.regex.pattern
+
+print "\n======\n"
+
+### run the parse
+match = rule.regex.match( raw_metric )
+
+print "Raw metric: %s" % raw_metric
+if match:
+  print "Match dict: %s" % match.groupdict()
+  print "Result: %s" % rule.output_template % match.groupdict()
+
+else:
+  print "ERROR: NO MATCH"