[bug#62754] [PATCH] doc: Use G-Expressions for package definition example.

[Ivan Sokolov <ivan-p-sokolov@ya.ru>]

Bruno Victal <mirai@makinata.eu> writes:

> * doc/guix.texi (Build Phases): Use G-Expressions for example.
> ---
>  doc/guix.texi | 29 +++++++++++++++++------------
>  1 file changed, 17 insertions(+), 12 deletions(-)
>
> diff --git a/doc/guix.texi b/doc/guix.texi
> index ed42488882..100ad93a3e 100644
> --- a/doc/guix.texi
> +++ b/doc/guix.texi
> @@ -10131,21 +10131,26 @@ Build Phases
>      ;; other fields omitted
>      (build-system gnu-build-system)
>      (arguments
> -     '(#:phases (modify-phases %standard-phases
> -                  (delete 'configure)
> -                  (add-before 'build 'set-prefix-in-makefile
> -                    (lambda* (#:key outputs #:allow-other-keys)
> -                      ;; Modify the makefile so that its
> -                      ;; 'PREFIX' variable points to "out".
> -                      (let ((out (assoc-ref outputs "out")))
> -                        (substitute* "Makefile"
> -                          (("PREFIX =.*")
> -                           (string-append "PREFIX = "
> -                                          out "\n")))))))))))
> +     (list
> +      #:phases
> +      #~(modify-phases %standard-phases
> +          (delete 'configure)
> +          (add-before 'build 'set-prefix-in-makefile
> +            (lambda* (#:key inputs #:allow-other-keys)
> +              ;; Modify the makefile so that its
> +              ;; 'PREFIX' variable points to "out" and
> +              ;; 'XMLLINT' points to the correct path.
> +              (substitute* "Makefile"
> +                (("PREFIX =.*")
> +                 (string-append "PREFIX = " #$output "\n"))
> +                (("XMLLINT =.*")
> +                 (string-append "XMLLINT = "
> +                                (search-input-file inputs "/bin/xmllint")
> +                                "\n"))))))))))
>  @end lisp
>  
>  The new phase that is inserted is written as an anonymous procedure,
> -introduced with @code{lambda*}; it honors the @code{outputs} parameter
> +introduced with @code{lambda*}; it honors the @code{inputs} parameter
>  we have seen before.  @xref{Build Utilities}, for more about the helpers
>  used by this phase, and for more examples of @code{modify-phases}.
>  
>
> base-commit: b78d6ceaa07be3c7582627cd28712b67102e521c

inputs parameter has not previously appeared in the documentation, the
sentence before last does not make sense anymore.