Attach validate_format(...) to each SourceFormat that can reject formats.

[dak.git] / daklib / srcformats.py

diff --git a/daklib/srcformats.py b/daklib/srcformats.py
index 2b07c7ef4f524021b21a033944df3a7be81653af..bcb2e2bbae4e373df2e0c2cb1a130a58d15cfa1e 100644 (file)
--- a/daklib/srcformats.py
+++ b/daklib/srcformats.py
@@ -5,6 +5,36 @@ 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)
@@ -27,36 +57,14 @@ class SourceFormat(type):
             if has[key]:
                 yield "contains source files not allowed in format %s" % cls.name
 
-    @classmethod
-    def parse_format(cls, txt):
-        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
-
     @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)
+        """
+        Raises UnknownFormatError if the specified format tuple is not valid for
+        this format (for example, the format (1, 0) is not valid for the
+        "3.0 (quilt)" format). Return value is undefined in all other cases.
+        """
+        pass
 
 class FormatOne(SourceFormat):
     __metaclass__ = SourceFormat
@@ -80,6 +88,19 @@ class FormatOne(SourceFormat):
         for msg in super(FormatOne, cls).reject_msgs(has):
             yield msg
 
+    @classmethod
+    def validate_format(cls, format, is_a_dsc=False, field='files'):
+        msg = "Invalid format %s definition: %r" % (cls.name, format)
+
+        if is_a_dsc:
+            if format != (1, 0):
+                raise UnknownFormatError, msg
+        else:
+            if (format < (1,5) or format > (1,8)):
+                raise UnknownFormatError, msg
+            if field != "files" and format < (1,8):
+                raise UnknownFormatError, msg
+
 class FormatThree(SourceFormat):
     __metaclass__ = SourceFormat
 
@@ -89,6 +110,12 @@ class FormatThree(SourceFormat):
     requires = ('native_tar',)
     disallowed = ('orig_tar', 'debian_diff', 'debian_tar', 'more_orig_tar')
 
+    @classmethod
+    def validate_format(cls, format, **kwargs):
+        if format != (3, 0, 'native'):
+            raise UnknownFormatError, "Invalid format %s definition: %r" % \
+                (cls.name, format)
+
 class FormatThreeQuilt(SourceFormat):
     __metaclass__ = SourceFormat
 
@@ -97,3 +124,9 @@ class FormatThreeQuilt(SourceFormat):
 
     requires = ('orig_tar', 'debian_tar')
     disallowed = ('debian_diff', 'native_tar')
+
+    @classmethod
+    def validate_format(cls, format, **kwargs):
+        if format != (3, 0, 'quilt'):
+            raise UnknownFormatError, "Invalid format %s definition: %r" % \
+                (cls.name, format)