bug#34900: Add emacs-semantic-refactor

[Marius Bakke <mbakke@fastmail.com>]

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Jack Hill <jackhill@jackhill.us> writes:

> Hi Guix,
>
> The attached patch adds the emacs-semantic-refactor package.

Thanks!

> When reviewing this patch some particular things to look out for/questions 
> I have:
>
> 0) There are different sections in the (gnu packages emacs-xyz) module 
> that are delineated by comments (e.g. Emacs Hacking, Web Browsing, and 
> Miscellaneous). I've added the definition of emacs-semantic-refactor near 
> the end of the file in the Miscellaneous section. I wonder if this is 
> correct or if it should go in the Emacs Hacking section. Paredit, which 
> would be used in similar scenarios to semantic-refactor is in the Emacs 
> Hacking section.

I don't have a good answer, so I went with your initial approach.

> 1) The upstream source contains a number of animated gif files 
> demonstrating usage in the srefactor-demos directory. I do not see a build 
> process for these, and assume they were created by hand. Are we free to 
> distribute these in Guix?

As long as they are free to use and redistribute (i.e. not under a
separate license), it should be okay for Guix.  GIFs generally don't
come with build instructions :-)

> 2) semantic-refactor has an optional integration with projectile whose 
> availability is checked for with (featurep 'projectile). I have not added 
> projectile as an input or propagated-input. Is this OK?

Great!  Optional dependencies are typically not propagated.

> 3) I'm still new to writing package definitions, so extra scrutiny is 
> warranted, particularly for the synopsis and description.

I added a "This package provides a ..." prefix to the description to
provide a little more context for the prospective reader.

Pushed as ea4a1e5d0b13b5c548804ac854e6eb30c5149ce4, thank you!

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