First draft of the pure Python parser done, we should be noarch.

Fixes #2

1 files changed, 68 insertions, 0 deletions

diff --git a/wlp_parser.py b/wlp_parser.py
new file mode 100644
index 0000000..35da516
--- /dev/null
+++ b/wlp_parser.py
@@ -0,0 +1,68 @@
+import rply
+
+__lg = rply.LexerGenerator()
+# Add takes a rule name, and a regular expression that defines the rule.
+__lg.add("OWNER", r'<[a-zA-Z0-9_.+-]+@[a-zA-Z0-9._-]+>')
+__lg.add("VAL", r'[\'`"][a-zA-Z0-9@_+.<>() -]+[\'`"]')
+__lg.add("VAR", r'[a-zA-Z0-9_<>-]+[:]?')
+
+__lg.ignore(r"\s+")
+__lg.ignore(r'[{}=]+')
+
+lexer = __lg.build()
+
+__pg = rply.ParserGenerator(['OWNER', 'VAL', 'VAR'],
+                            cache_id='wlp_parser')
+
+"""
+    $accept ::= block $end
+    block ::= blockstatement
+         | block blockstatement
+    blockstatement ::= owner '{' commandline '}'
+    commandline ::= command
+               | commandline command
+    command ::= varpart '=' valpart
+    owner ::= OWNERID
+    varpart ::= VARID
+    valpart ::= VALID
+"""
+
+
+@__pg.production('main : block')
+def main(p):
+    return p[0]
+
+
+@__pg.production('block : blockstatement')
+def block(p):
+    return p
+
+
+@__pg.production('block : block blockstatement')
+def block_blockstatement(p):
+    p[0].append(p[1])
+    return p[0]
+
+
+@__pg.production('blockstatement : OWNER commandline')
+def blockstatement(p):
+    return [p[0], p[1]]
+
+
+@__pg.production('commandline : command')
+def commandline(p):
+    return p
+
+
+@__pg.production('commandline : commandline command')
+def commandline_command(p):
+    p[0].append(p[1])
+    return p[0]
+
+
+@__pg.production('command : VAR VAL')
+def command(p):
+    return p
+
+
+parser = __pg.build()