Split out parse_format to module-level and test it explicitly.

[dak.git] / daklib / srcformats.py

diff --git a/daklib/srcformats.py b/daklib/srcformats.py
index 0a74c19262f99fe91e6476487cabd39bf8f22faa..f3afb8dba8b65b04fceca139b79b906b214e3080 100644 (file)
--- a/daklib/srcformats.py
+++ b/daklib/srcformats.py
@@ -1,7 +1,40 @@
 import re
 
+from regexes import re_verwithext
+from dak_exceptions import UnknownFormatError
+
 srcformats = []
 
+def parse_format(txt):
+    """
+    Parse a .changes Format string into a tuple representation for easy
+    comparison.
+
+    >>> parse_format('1.0')
+    (1, 0)
+    >>> parse_format('8.4 (hardy)')
+    (8, 4, 'hardy')
+
+    If the format doesn't match these forms, raises UnknownFormatError.
+    """
+
+    format = re_verwithext.search(txt)
+
+    if format is None:
+        raise UnknownFormatError, txt
+
+    format = format.groups()
+
+    if format[1] is None:
+        format = int(float(format[0])), 0, format[2]
+    else:
+        format = int(format[0]), int(format[1]), format[2]
+
+    if format[2] is None:
+        format = format[:2]
+
+    return format
+
 class SourceFormat(type):
     def __new__(cls, name, bases, attrs):
         klass = super(SourceFormat, cls).__new__(cls, name, bases, attrs)
@@ -24,6 +57,18 @@ class SourceFormat(type):
             if has[key]:
                 yield "contains source files not allowed in format %s" % cls.name
 
+    @classmethod
+    def validate_format(cls, format, is_a_dsc=False, field='files'):
+        if is_a_dsc:
+            if format != (1,0) and \
+               format != (3,0,"quilt") and format != (3,0,"native"):
+                raise UnknownFormatError, repr(format)
+        else:
+            if (format < (1,5) or format > (1,8)):
+                raise UnknownFormatError, repr(format)
+            if field != "files" and format < (1,8):
+                raise UnknownFormatError, repr(format)
+
 class FormatOne(SourceFormat):
     __metaclass__ = SourceFormat