From a6fdf05ee91902806dcfa51ad9cec6b6e843947b Mon Sep 17 00:00:00 2001
From: Joscha <joscha@plugh.de>
Date: Sat, 15 May 2021 15:13:34 +0200
Subject: [PATCH] Allow variable whitespace in arrow rules

---
 CONFIG.md            |  6 +++---
 PFERD/transformer.py | 10 ++++++++--
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/CONFIG.md b/CONFIG.md
index cccc751..df3e8f2 100644
--- a/CONFIG.md
+++ b/CONFIG.md
@@ -285,7 +285,7 @@ For this task, the name arrows can be used. They are variants of the normal
 arrows that only look at the file name instead of the entire path.
 
 ```
-\..* -name-re-> !
-__pycache__ -name-> !
-.*\.md -name-re-> !
+\..*        -name-re-> !
+__pycache__ -name->    !
+.*\.md      -name-re-> !
 ```
diff --git a/PFERD/transformer.py b/PFERD/transformer.py
index 1b80433..135baf2 100644
--- a/PFERD/transformer.py
+++ b/PFERD/transformer.py
@@ -255,6 +255,12 @@ def parse_arrow(line: Line) -> str:
     return "".join(name)
 
 
+def parse_whitespace(line: Line) -> None:
+    line.expect(" ")
+    while line.get() == " ":
+        line.advance()
+
+
 def parse_rule(line: Line) -> Rule:
     # Parse left side
     leftindex = line.index
@@ -264,13 +270,13 @@ def parse_rule(line: Line) -> Rule:
         raise RuleParseException(line, "Left side can't be '!'")
 
     # Parse arrow
-    line.expect(" ")
+    parse_whitespace(line)
     arrowindex = line.index
     arrowname = parse_arrow(line)
 
     # Parse right side
     if line.get():
-        line.expect(" ")
+        parse_whitespace(line)
         right = parse_string(line)
     else:
         right = False