X-Git-Url: https://git.decadent.org.uk/gitweb/?a=blobdiff_plain;f=daklib%2Fsrcformats.py;h=7d7dd940e3837c1c5c99a7f8708ae3663ae53d44;hb=4e9d67806b0cf200b68f2a199dd0fdf183b4c6de;hp=0a74c19262f99fe91e6476487cabd39bf8f22faa;hpb=32dc9d52c53207a6524ecf63ac7866435ae40374;p=dak.git

diff --git a/daklib/srcformats.py b/daklib/srcformats.py
index 0a74c192..7d7dd940 100644
--- a/daklib/srcformats.py
+++ b/daklib/srcformats.py
@@ -1,7 +1,22 @@
 import re
 
+from dak_exceptions import UnknownFormatError
+
 srcformats = []
 
+def get_format_from_string(txt):
+    """
+    Returns the SourceFormat class that corresponds to the specified .changes
+    Format value. If the string does not match any class, UnknownFormatError
+    is raised.
+    """
+
+    for format in srcformats:
+        if format.re_format.match(txt):
+            return format
+
+    raise UnknownFormatError, "Unknown format %r" % txt
+
 class SourceFormat(type):
     def __new__(cls, name, bases, attrs):
         klass = super(SourceFormat, cls).__new__(cls, name, bases, attrs)