Rearrange arguments to allow multiple rule files

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = ProcruSQL
-version = 0.0.2
+version = 0.0.3
 author = Peter J. Holzer
 author_email = hjp@hjp.at
 description = Make a database fit its description

src/procrusql/__init__.py

@@ -1,3 +1,4 @@
+import argparse
 import logging
 import sys
 
@@ -247,7 +248,17 @@ def dump_dot():
 
 def main():
     logging.basicConfig(format="%(asctime)s %(levelname)s %(name)s %(lineno)d | %(message)s", level=logging.DEBUG)
-    with open(sys.argv[1]) as rf:
+    ap = argparse.ArgumentParser()
+    ap.add_argument("--dbname")
+    ap.add_argument("--dbuser")
+    ap.add_argument("files", nargs="+")
+    args = ap.parse_args()
+
+    db = psycopg2.connect(dbname=args.dbname, user=args.dbuser)
+
+    rules = []
+    for f in args.files:
+        with open(f) as rf:
             text = rf.read()
         ps = parser.ParseState(text)
 
@@ -256,7 +267,7 @@ def main():
         if not ps2:
             ps.printerror()
             sys.exit(1)
+        rules.extend(ps2.ast)
 
-    db = psycopg2.connect(sys.argv[2])
-    fit(db, ps2.ast)
+    fit(db, rules)