[PATCH] debian: strictly depend on the same version of libnotmuch

[Daniel Kahn Gillmor]

On 07/10/2011 10:36 PM, David Bremner wrote:
>> This suggests to me that we may need to be bumping the SONAME when the
>> query string format changes, no?
> 
> If we follow the same rules as with symbols, then only when it breaks
> backwards compatability.

Right, but what breaks backwards compatibility in a string-based indexer?

If the query "foo bar:baz" is interpreted as a search for two separate
simple strings, and then an update treats the "bar:" suffix specially,
is that backwards-incompatible because the semantics of the identical
search change?

The only way i can currently imagine "backwards compatibility" is if
version X has a set of query strings which all return some kind of "not
implemented" error value, and then version X+1 returns a legitimate
response for some subset of those same query strings.

Otherwise, each change in query string syntax actively modifies (in a
non-backwards-compatible way) the semantics of some part of the interface.

Is there some other way to view this distinction?

	--dkg

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