Re: [RFC/PATCH] Configurable hyperlinking in gitk

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On 17/09/11 21:26, Chris Packham wrote:
> Hi,
> 
> On 17/09/11 14:29, Jeff Epler wrote:
>> Some time ago I hardcoded this into gitk for $DAY_JOB and find it very
>> useful.  I made it configurable in the hopes that it might be adopted
>> upstream. (unfortunately, the configurable version is radically
>> different from the original hard-coded version, so I can't say this
>> has had much testing yet)
> 
> This is definitely something folks at my $dayjob would be interested in.
> We've already done some customisation of gitweb to do something similar.
> I'm not actually sure what the changes where or how configurable they
> are. I'll see if I can dig them out on Monday someone else might want to
> polish them into something suitable (I might do it myself if I get some
> tuits).
> 
>> The definition of the allowed regular expression in the docs
>> probably needs some refinement.  Basically, they have to also be REs
>> that can be concatenated with the "|" character, which is not true
>> of REs that begin with the *** flavor selector (which I had not
>> heard of before rereading `man re_syntax` just now) or (?xyz)
>> embedded options.  Or maybe there's an efficient alternate approach
>> to scanning for the next non-overlapping match among several
>> patterns that doesn't involve concatenating the patterns.
>>
>> I'm not sure about the "one line" restriction; at first I thought
>> that everything was fed to 'appendwithlinks' in arbitrary chunks,
>> but not I see that they are mostly logical chunks (and probably only
>> the comment, not the headers or commit descriptors, will have
>> anything to linkify).  The problem again seems to be how to succinctly
>> describe what is permitted.
> 
> For my use case the one line restriction is fine. We tend to put the bug
> number in the headline anyway.
> 
> Sometimes when a commit fixes multiple bugs we put all the bug numbers
> in separated by commas. I don't know Tcl well enough to tell if your
> code supports that or not.
> 
>> There are probably better names for the configuration options, too.
> 
> It'd be nice if the config variables weren't gitk specific. .re and .sub
> could be applied to gitweb and maybe other git viewers outside of
> gig.git might decide to use them. My bikeshedding suggestion would be to
> just drop the gitk prefix and have linkify.re and linkify.sub.

That should be linkify.<name>.re and linkify.<name>.sub

>> Suggestions?  Problems?  Successes?
> 
> Re-compiling now. I won't be able to actually test it properly until I'm
> back in the office but I can at least check that the links are generated.

Slight complication. The URL of our bug tracker has an ampersand '&' in
it. Tcl's substitution does what one might expect and puts the matched
text where the '&' is. I've tried using url friendly %26 but something
eats the %. I've also tried backslashes to no avail.

To answer my own question since I started writing this email I've found
that using %% works (only the first one gets eaten). Not sure if that's
expected behaviour or not (printf escaping maybe?).

Also since I've been playing around I've tried a commit with multiple
bug numbers on one line and that works as expected.

Thanks
Chris
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