GNU bug report logs - #37523
Print hint if build fails due to invalid character in package source base name

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From: Hartmut Goebel <h.goebel@HIDDEN>
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Organization: crazy-compilers.com
Subject: Print hint if build fails due to invalid character in package source
 base name
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Followup to <http://issues.guix.gnu.org/issue/26175#4>:

guix shall print a hint if building fails due to the package source base
name containing a character invalid in a store filename (e.g. "@" or "%")=
.

Currently, when building such a package, one gets an error message like:

guix build: error: invalid character `@' in name
`kde-l10n-ca@HIDDEN'

guix build should catch this error and print a hint like:

You may add a =E2=80=98file-name=E2=80=99 field to the package source to =
work around this.


Ludovic Court=C3=A8s wrote on Sun Sep 08 22:07:10+0200 2019

> Unfortunately it cannot really be caught. I mean, you could catch
> =E2=80=98&store-protocol-error=E2=80=99 error conditions, but then the =
error message is
> just a string, there=E2=80=99s no error code you can compare against.


Example package raising this error:

(use-modules (guix packages) (guix download) (guix build-system gnu))

(package
=C2=A0 (name "kde-l10n-ca-valencia")
=C2=A0 (version "14.11.80")
=C2=A0 (source
=C2=A0=C2=A0 (origin
=C2=A0=C2=A0=C2=A0=C2=A0 (method url-fetch)
=C2=A0=C2=A0=C2=A0=C2=A0 (uri (string-append "mirror://kde//Attic/applica=
tions/"
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ver=
sion "/src/kde-l10n/"
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 "kd=
e-l10n-ca@valencia-" version ".tar.xz"))
=C2=A0=C2=A0=C2=A0=C2=A0 (sha256 (base32
"1mqadassxcm0m9r1l02m5vr4bbandn48xz8gifvxmb4wiz8i8d0w"))))
=C2=A0 (build-system gnu-build-system)
=C2=A0 (synopsis "") (description "") (license "") (home-page ""))

--=20
Regards
Hartmut Goebel

| Hartmut Goebel          | h.goebel@HIDDEN               |
| www.crazy-compilers.com | compilers which you thought are impossible |