Re: 02/03: build: go-build-system: Use WHEN for side-effect conditionals.

[Mark H Weaver <mhw@netris.org>]

Hi Maxim,

guix-commits@gnu.org writes:

> apteryx pushed a commit to branch master
> in repository guix.
>
> commit 7e84d3eef724ef18f8e1c1b0932b6f74d3ae3e35
> Author: Maxim Cournoyer <maxim.cournoyer@gmail.com>
> Date:   Thu Apr 4 23:26:04 2019 -0400
>
>     build: go-build-system: Use WHEN for side-effect conditionals.
>     
>     * guix/build/go-build-system.scm (unpack): Replace single branch `if' by
>     `when'.

The summary above does reflect the changes made:

> diff --git a/guix/build/go-build-system.scm b/guix/build/go-build-system.scm
> index 973ee6e..92a5c86 100644
> --- a/guix/build/go-build-system.scm
> +++ b/guix/build/go-build-system.scm
> @@ -158,6 +158,10 @@ unpacking."
>        ((display "WARNING: The Go import path is unset.\n")))
>    (if (string-null? unpack-path)
>        (set! unpack-path import-path))
> +  (when (string-null? import-path)
> +    ((display "WARNING: The Go import path is unset.\n")))
> +  (when (string-null? unpack-path)
> +    (set! unpack-path import-path))
>    (let ((dest (string-append (getenv "GOPATH") "/src/" unpack-path)))
>      (mkdir-p dest)
>      (if (file-is-directory? source)

You added the 'when's, but left the 'if's, so now it's redundant.

Also, please remove the extra pair of parentheses around the WARNING.
If that code is ever run, it will result in an error, because it will
try to call (as a procedure with no arguments) the value returned by
'display'.

      Thanks,
        Mark