Re: Small texlive variant

[Ludovic Courtès]

Andreas Enge <address@hidden> skribis:

> On Tue, Jan 19, 2016 at 10:20:42AM +0100, Ludovic Courtès wrote:
>> This is a bit verbose.  I think it would be nice to have a data
>> structure to describe what we are deleting, along these lines
>> (untested):
>
> I agree, computer science 101 tells us to use a function when repeating the
> same sequence of statements on separate data. This is what I did in the new
> attached patch; I also "flattened out" the deletion as you suggest.
>
> However, the data structure thing was too complicated for me and I think not
> really needed.

I think it was clearer and separated concerns better (filtering
vs. deleting.)  :-)

The version you propose is acceptable too.

> From 8a2ebb8163c54f80f2a5e4708956b87b134ada85 Mon Sep 17 00:00:00 2001
> From: Andreas Enge <address@hidden>
> Date: Fri, 15 Jan 2016 16:00:47 +0100
> Subject: [PATCH] gnu: Add texlive-minimal.
>
> * gnu/packages/texlive.scm (texlive-texmf-minimal, texlive-minimal):
>   New variables.

[...]

> +             (with-directory-excursion "texmf-dist"
> +               (for-each delete-file-recursively
> +                         '("doc" "source" "tex4ht"))
> +               ;; Delete all subdirectories of "fonts", except for those
> +               ;; named "cm", that is, "afm/public/amsfonts/cm",

This comment is too indented and redundant with the code below, I think.

> +             (let ((delete
> +                     ;; delete all files and directories in SUBDIR
> +                     ;; except for those given in the list EXCLUDE

Make it an inner ‘define’, to reduce indentation.

Also the docstring should be below the formal parameter list, and should
be a sentence.

> +                     (lambda (subdir exclude)

I’d make exclude a keyword parameter, for clarity.

With these changes, it would look like:

  (define* (delete directory #:key (except '()))
    ;; Delete all the files and directories in DIRECTORIES, except those
    ;; listed in in EXCEPT.
    …)

How does that sound?

Thanks!

Ludo’.