Re: git name-rev not accepting abbreviated SHA with --stdin

2015-07-03 Thread Junio C Hamano
Sitaram Chamarty sitar...@gmail.com writes:

 On 06/25/2015 05:41 AM, Junio C Hamano wrote:
 Sitaram Chamarty sitar...@gmail.com writes:
 
 This *is* documented, but I'm curious why this distinction is made.
 
 I think it is from mere laziness, and also in a smaller degree
 coming from an expectation that --stdin would be fed by another
 script like rev-list where feeding full 40-hex is less work than
 feeding unique abbreviated prefix.

 Makes sense; thanks.  Maybe if I feel really adventurous I will,
 one day, look at the code :-)

Sorry, but I suspect this is not 100% laziness; it is meant to read
text that has object names sprinkled in and output text with object
names substituted.  I suspect that this was done to prevent a short
string that may look like an object name like deadbabe from getting
converted into an unrelated commit object name.

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Re: git name-rev not accepting abbreviated SHA with --stdin

2015-07-03 Thread Junio C Hamano
On Fri, Jul 3, 2015 at 6:26 PM, Sitaram Chamarty sitar...@gmail.com wrote:
 Jokes apart, I'm not sure the chances of *both* those things happening
 -- an accidental hash-like string in the text *and* it matching an
 existing hash -- are high enough to bother.  If it can be done without
 too much code, it probably should.

To be fair to the original implementor, I think we didn't have an API to ask
do we have a committish object with this name? with an abbreviated SHA-1.
All we had was do we have an object with this name?.

As the only answer the command can give is an exteneded SHA-1 for
committish, it is understandable that hitting blobs and trees (which typically
are much more numerous than committishes) with false positives would have
been a real risk the implementation wanted to avoid.
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Re: git name-rev not accepting abbreviated SHA with --stdin

2015-07-03 Thread Sitaram Chamarty
On 07/03/2015 11:06 PM, Junio C Hamano wrote:
 Sitaram Chamarty sitar...@gmail.com writes:
 
 On 06/25/2015 05:41 AM, Junio C Hamano wrote:
 Sitaram Chamarty sitar...@gmail.com writes:

 This *is* documented, but I'm curious why this distinction is made.

 I think it is from mere laziness, and also in a smaller degree
 coming from an expectation that --stdin would be fed by another
 script like rev-list where feeding full 40-hex is less work than
 feeding unique abbreviated prefix.

 Makes sense; thanks.  Maybe if I feel really adventurous I will,
 one day, look at the code :-)
 
 Sorry, but I suspect this is not 100% laziness; it is meant to read
 text that has object names sprinkled in and output text with object
 names substituted.  I suspect that this was done to prevent a short
 string that may look like an object name like deadbabe from getting
 converted into an unrelated commit object name.

As a perl programmer, laziness is much more palatable to me as a reason
;-)

Jokes apart, I'm not sure the chances of *both* those things happening
-- an accidental hash-like string in the text *and* it matching an
existing hash -- are high enough to bother.  If it can be done without
too much code, it probably should.

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Re: git name-rev not accepting abbreviated SHA with --stdin

2015-06-24 Thread Junio C Hamano
Sitaram Chamarty sitar...@gmail.com writes:

 This *is* documented, but I'm curious why this distinction is made.

I think it is from mere laziness, and also in a smaller degree
coming from an expectation that --stdin would be fed by another
script like rev-list where feeding full 40-hex is less work than
feeding unique abbreviated prefix.
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Re: git name-rev not accepting abbreviated SHA with --stdin

2015-06-24 Thread Sitaram Chamarty
On 06/25/2015 05:41 AM, Junio C Hamano wrote:
 Sitaram Chamarty sitar...@gmail.com writes:
 
 This *is* documented, but I'm curious why this distinction is made.
 
 I think it is from mere laziness, and also in a smaller degree
 coming from an expectation that --stdin would be fed by another
 script like rev-list where feeding full 40-hex is less work than
 feeding unique abbreviated prefix.

Makes sense; thanks.  Maybe if I feel really adventurous I will,
one day, look at the code :-)
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