[SOLVED] (was: hg grep seems not very effective to find strings of old changesets!?)

[Uwe Brauer]

>>> "DLB" == Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

> On Sat, 23 Oct 2021 18:58:06 +0200, Uwe Brauer <oub at mat.ucm.es> declaimed
> the following:

>> 
>> Maybe I don't know enough of the sophisticated syntax of «hg grep» but I
>> have always found hg grep not very useful.
>> 
> https://www.mercurial-scm.org/repo/hg/help/grep

>> Here is an example: I have around 700 change sets in a current repository 
>> 
>> I found out that in revision 562, the string   \label{eq:section4-sh15}
>> appeared in a certain file. However hg grep was enable to find that
>> string in that particular revision.
>> 

> 	What was the exact invocation you used? 

> { } may need to be escaped as they are used to delimit an occurrence
> count/range

I tried 

hg grep -a  eq:section4-sh15 section4-sh.tex  

Which did not work, but


hg grep -a -r 0:tip eq:section4-sh15 section4-sh.tex  

Did! So the -r 0:tip option is very important, but the documentation is a bit sparse!

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