diff --horizon-lines=lines

diff --horizon-lines=lines

[m@d m0nk]

Hello All,

I am trying to understand the practical use of "--horizon-lines=lines"
option in the diff utility.

Can i get some pointers on two sample files which can demonstrate the
use of --horizon-lines=lines

I understood the theory / definition from the info / man file.
However, I am unable to reproduce the scenario.

Request some pointers.

-- 

__| madm0nk |__
th3 sib3rian m0nk
--------------------------

Re: diff --horizon-lines=lines

[Eliot Moss]

On 5/27/2020 10:27 PM, m@d m0nk via Cygwin wrote:
> Hello All,
> 
> I am trying to understand the practical use of "--horizon-lines=lines"
> option in the diff utility.
> 
> Can i get some pointers on two sample files which can demonstrate the
> use of --horizon-lines=lines
> 
> I understood the theory / definition from the info / man file.
> However, I am unable to reproduce the scenario.
> 
> Request some pointers.

This stackexchange post may give some insight (it did for me):

https://unix.stackexchange.com/questions/158097/diff-horizon-lines-lines-explained

Regards - EM

Re: diff --horizon-lines=lines

[m@d m0nk]

Thanks EM.I did go through the post, I understood the concept/theory,
but I am unable to do a practical demo of it. Do you have a sample
file set for demo or can you suggest something?

On Thu, May 28, 2020 at 8:10 AM Eliot Moss <moss@cs.umass.edu> wrote:
>
> On 5/27/2020 10:27 PM, m@d m0nk via Cygwin wrote:
> > Hello All,
> >
> > I am trying to understand the practical use of "--horizon-lines=lines"
> > option in the diff utility.
> >
> > Can i get some pointers on two sample files which can demonstrate the
> > use of --horizon-lines=lines
> >
> > I understood the theory / definition from the info / man file.
> > However, I am unable to reproduce the scenario.
> >
> > Request some pointers.
>
> This stackexchange post may give some insight (it did for me):
>
> https://unix.stackexchange.com/questions/158097/diff-horizon-lines-lines-explained
>
> Regards - EM



-- 

__| madm0nk |__
th3 sib3rian m0nk
--------------------------

Re: diff --horizon-lines=lines

[Brian Inglis]

On 2020-05-27 20:42, m@d m0nk via Cygwin wrote:
> On Thu, May 28, 2020 at 8:10 AM Eliot Moss wrote:
>> On 5/27/2020 10:27 PM, m@d m0nk via Cygwin wrote:
>>> I am trying to understand the practical use of "--horizon-lines=lines"
>>> option in the diff utility.
>>> Can i get some pointers on two sample files which can demonstrate the
>>> use of --horizon-lines=lines
>>> I understood the theory / definition from the info / man file.
>>> However, I am unable to reproduce the scenario.
>>> Request some pointers.

>> This stackexchange post may give some insight (it did for me):
>> https://unix.stackexchange.com/questions/158097/diff-horizon-lines-lines-explained
> Thanks EM.I did go through the post, I understood the concept/theory,
> but I am unable to do a practical demo of it. Do you have a sample
> file set for demo or can you suggest something?

The option --horizon-lines is intended to adjust (normally increase) the amount
of context kept for matching around a hunk of differences, independent of the
displayed context lines, before diff concludes that hunk is independent of any
subsequent changes and emit the hunk with
suppress-common-lines|--context|--unified lines of context around it.

Often a few blank (or other common text) lines will match any other range of a
few blank (or other common text) lines and diff will decide the hunk is
complete, so you may end up with a number of small separate added/deleted hunks,
rather than a larger hunk where some lines may have been changed.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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