[Bug 458685] Review Request: R2spec - Python script to generate R spec file

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https://bugzilla.redhat.com/show_bug.cgi?id=458685





--- Comment #8 from R P Herrold <herrold@xxxxxxxxxxxx>  2008-08-15 13:05:17 EDT ---
> euh... since when the spec file should be in the tarball ??

ummm ---  since forever?

rpmbuild -ta tarball.tar.gz 
  with works just fine when the .spec file is there.  This is a feature of
rpmbuild and has been for a very long time.

This rpmbuild feature exists and a .spec file can live in a distributed
tarball, because it permits a 'single point of truth' ("SPOT").  See: The
Practice of Programming, Brian W. Kernighan, Rob Pike, Addison-Wesley, Reading,
MA, USA, 1999 at p. 239

Cited at, eg:
http://press.samedi-studios.com/publications/2004/jones2004pl4li/jones2004pl4li.pdf

> Single Point of Truth[30] If a single application has more than one description of the same information, then keeping these different descriptions from conflicting is difficult. The reason why such conflicts exist comes from the lack of ability to express the information in a single place. This may oc-
cur either because two or more implementation languages are used and are
not easily cross-callable or the one language is not powerful enough to state
the same truth only once. This is an example of the lack of a language (or
languages) ability to capture the information of a domain.

> For example, in the Press Pot Java annotation system[23], a single file main-
tains information describing bytecodes. By generating code from this descrip-
tion language to both C and Java, Press Pot is able to keep the semantic
description always in sync in both the Java front-end and the C back-end.
As another example, in C programs, it is difficult to express a data file format
in a single declaration and from that description drive both serialization
and deserialization without using some sort of description language. From
a description language, serializers and deserializers can be generated and
consistency insured.

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