Add the parser.

parser.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+import sys
+import pprint
+import ply.yacc as yacc
+
+from lexer import tokens
+
+def p_config(p):
+    ''' config : sections '''
+    p[0] = p[1]
+
+def p_sections(p):
+    ''' sections : sections section
+                 | section
+    '''
+    if len(p) == 2:
+        p[0] = [p[1]]
+    else:
+        p[0] = p[1] + [p[2]]
+
+def p_section(p):
+    ''' section : SECTION IDENTIFIER LBRACE statements RBRACE '''
+    p[0] = { 'name': p[2], 'content': p[4] }
+
+def p_statements(p):
+    ''' statements : statements statement
+                   | statement
+    '''
+    if len(p) == 2:
+        p[0] = [p[1]]
+    else:
+        p[0] = p[1] + [p[2]]
+
+def p_statement(p):
+    ''' statement : IDENTIFIER EQU value SEMI '''
+    p[0] = {'name': p[1], 'value': p[3]}
+
+def p_value(p):
+    ''' value : IDENTIFIER
+              | STRING
+              | boolean
+    '''
+    p[0] = p[1]
+
+def p_boolean(p):
+    ''' boolean : TRUE
+                | FALSE
+    '''
+    p[0] = p[1]
+
+start = 'config'
+
+filename = sys.argv[1]
+
+parser = yacc.yacc()
+
+pp = pprint.PrettyPrinter(indent=4)
+
+with open(filename, 'r') as f:
+    input = f.read()
+    pp.pprint(parser.parse(input))
+