From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@gnu.org>
Subject: Re: New build system: copy-build-system
Date: Wed, 29 Jan 2020 00:04:52 +0100
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In-Reply-To: <87v9ovbsym.fsf@ambrevar.xyz> (Pierre Neidhardt's message of
 "Tue, 28 Jan 2020 14:39:45 +0100")
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To: Pierre Neidhardt <mail@ambrevar.xyz>
Cc: guix-devel@gnu.org

Hi Pierre,

Pierre Neidhardt <mail@ambrevar.xyz> skribis:

> Examples:
>
> - `("foo/bar" "share/my-app/")`: Install bar to "share/my-app/bar".
> - `("foo/bar" "share/my-app/baz")`: Install bar to "share/my-app/baz".
> - `("foo/" "share/my-app")`: Install the content of foo inside "share/my-=
app",
>   e.g. install "foo/sub/file" to "share/my-app/sub/file".
> - `("foo/" "share/my-app" #:include ("sub/file"))`: Install only "foo/sub=
/file" to "share/my-app/sub/file".
> - `("foo/sub" "share/my-app" #:include ("file"))`: Install "foo/sub/file"=
 to "share/my-app/file".

Looks like it could work.

I think the general approach should be: pick a handful of packages that
you=E2=80=99d like to rewrite to the new build system, provide the options =
that
support it (but not more), and verify that the resulting package
definitions are indeed shorter.

> Maybe instead of having two #:include and #:include-regexp we could have =
just
> one #:include in which the list elements have a "marker" that tells wheth=
er they
> are regexps or not.

Probably the former, so that strings are either always or never
interpreted as regexps.  (Guile doesn=E2=80=99t have special =E2=80=9Cmarke=
rs=E2=80=9D for
regexps.)

Ludo=E2=80=99.