patch for force fetch

[Andriy Gapon]

on 16/05/2011 11:14 David Demelier said the following:
> On 16/05/2011 09:02, Andriy Gapon wrote:
>>
>> I've noticed the following problem.
>> If a distfile is updated by a distributor without renaming it (so that checksum
>> and possibly size change), then more often than not the port build system would
>> fail to fetch the distfile.
>> An example:
[snip]
>> I think that this happens because the old version of the distfile is still
>> present in download target location and fetch(1) thinks that it has a partially
>> downloaded file and tries to be smart.
>>
>> The following patch simply tries to remove the stale distfile before calling
>> fetch.  Maybe there is a smarter way about this, like e.g. passing some option
>> to fetch.
[snip]
> 
> make -DNO_CHECKSUM=yes ... is probably what you want, I guess.

I fail to see why.  Can you elaborate?

-- 
Andriy Gapon