Re: [PATCH] git-curl-compat.h: addition of all symbols defined by curl

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On Tue, Mar 15 2022, Elia Pinto wrote:

> This file was produced from a modified version of symbols.pl
> (https://github.com/curl/curl/blob/master/docs/libcurl/symbols.pl) and
> by manually adding the previous comments describing the dates of release
> of some curl versions not currently reported in the symbols-in-versions.
>
> To do this the symbols are listed in the order defined in the file
> symbols-in-versions rather than as they were previously inserted based
> on release dates.
>
> Most of these symbols are not used by git today. However, inserting
> them all starting from an automatic tool makes it largely unnecessary
> to update this file and therefore reduces the possibility
> of introducing possible errors in the future.
> [...]
>  1 file changed, 2875 insertions(+), 69 deletions(-)

*gulp* :)

> +#define LIBCURL_HAS(x) \
> +  (defined(x ## _FIRST) && (x ## _FIRST <= LIBCURL_VERSION_NUM) && \
> +   (!defined(x ## _LAST) || ( x ## _LAST >= LIBCURL_VERSION_NUM)))

As the recent author of this file I think there's certainly space to
improve it, e.g. perhaps this macro & the change Junio suggests
downthread, but...

> +#define CURLALTSVC_H1_FIRST 0x074001 /* Added in 7.64.1 */
> +#define GIT_CURL_HAVE_CURLALTSVC_H1 \

[snip ~3k lines lines]

I'd really prefer for us not to go down this route. If you look at the
patches I did where I removed the version comparisons in favor of these
GIT_* constants the improvement was in readability & discovery. I.e. to
see at a glance where this project was on curl compatibility &
compatibility shims.

If we add a new version-dependant curl feature the time saving is really
not going to be in adding a trivial GIT_CURL_* line to the file. It's
always going to be the compatibility shim itself that takes *much*
longer.

Right now you can easily discover where we need those shims with "git
grep GIT_?CURL" (the "?" needing fixing, as noted downthread), after
this...




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