On 09/02/22 00:00, Eric Blake wrote:
> On Thu, Sep 01, 2022 at 05:25:55PM +0100, Richard W.M. Jones wrote:
>>>
>>> Can we introduce some xfuncname pattern for these "state machine" C
>>> files? The STATE_MACHINE hunk header is totally useless. I'd like
>>> "NEWSTYLE.OPT_META_CONTEXT.START". :)
>>
>> It took me a while to work out what this means, but yes I agree.
>> It seems the following should work but does not for me:
>>
>> .git/config add:
>> [diff "nbdstate"]
>> xfuncname = "^ [A-Z.]*:$"
>
> Probably also want _0-9 in that [].
>
>>
>> .git/info/attributes:
>> generator/states-*.c diff=nbdstate
>
> We could also put it in .gitattributes (we've already done it for *.ml
> files, where we give the user the 'git config' command to run to take
> advantage of it). It's a shame it's not quite automatic from a fresh
> git checkout, but the idea should work if done right.
>
> Here's what I tested. In .gitattributes:
>
> # Use the following one-time config to get nicer diffs of generator state
> files:
> # git config diff.states.xfuncname '^([a-zA-Z_]| [A-Z._0-9]*:$)'
> generator/states-*.c diff=states
>
> then run that git config, then looking at 'git log -p
> generator/states-*.c', the diff for 30ee21f6 is a lot more legible,
> with lines like:
>
> +++ b/generator/states-reply-structured.c
> @@ -89,13 +89,8 @@ REPLY.STRUCTURED_REPLY.CHECK:
> }
>
> /* Skip an unexpected structured reply, including to an unknown cookie. */
> - if (cmd == NULL || !h->structured_replies) {
>
> where the @@ line points to the right sub-state.
>
So that's commit 32f02567d50c009e835a3a167cf5e1a996257729 now; thanks!
Laszlo
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