Re: [GSOC][RFC] Add more builtin patterns for userdiff, as Mircroproject.

>
> Hello everyone,
> I'm Sergius, a Computer Science undergraduate student, and I want to
> begin Contributing to the Git project. So far, I've gone through
> Matheus' tutorial on First steps Contributing to Git, and I found it
> very helpful. I've also read the Contribution guidelines keenly and
> built Git from source.

> which I'm willing to work on. It talked about enhancing Git's
> "userdiff" feature in "userdiff.c" which is crucial for identifying
> function names in various programming languages, thereby improving the
> readability of "git diff" outputs.
>
> From my understanding, the project involves extending the `userdiff`
> feature to support additional programming languages that are currently
> not covered such as Shell, Swift, Go and the others.

> Here is a sample of how a language is defined in `userdiff.c`:
>
> > #define PATTERNS(lang, rx, wrx) { \
> > .name = lang, \
> > .binary = -1, \
> > .funcname = { \
> > .pattern = rx, \
> > .cflags = REG_EXTENDED, \
> > }, \
> > .word_regex = wrx "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+", \
> > .word_regex_multi_byte = wrx "|[^[:space:]]", \
> > }
>
> In this code, `lang` is the name of the language, `rx` is the regular
> expression for identifying function names, and `wrx` is the word
> regex.
>
> Approach: I Identified the Programming Languages that are not
> currently supported by the userdiff feature by reviewing the existing
> patterns in userdiff.c and comparing them with some popular
> programming languages.
> For each supported language, I would define a regular expression that
> could help identify function names in that language. This could
> include researching each language's syntax and testing their
> expressions to ensure that they work well.

> Also, I'd add a new IPATTERN definition for each language to the
> "userdiff.c" file, then rebuild Git and test the changes by creating a
> repo with files in the newly supported languages then run "git diff"
> to ensure the line @@ ... @@ produces their correct function names.
> Then submit a patch.