[bug#66901] [PATCH] scripts: edit: Fix relative file-name with 'load-path' option.

[Ludovic Courtès]

Hi!

Simon Tournier <zimon.toutoune@gmail.com> skribis:

> * guix/scripts/edit.scm (search-path*): Use 'canonicalize-path' if
> 'search-path' fails.

[...]

> $ guix edit -L src/example hi
> guix edit: error: file 'src/example/first.scm' not found in search path 
> ("src/example" 
> "/gnu/store/yzib23ah0rlmim0j4737g2wrhx1r1q3r-guix-module-union/share/guile/site/3.0"
>  "/gnu/store/84rvhd3j7pfqrh7717cv7ddv2dc8xad5-guile-3.0.9/share/guile/3.0" 
> "/gnu/store/84rvhd3j7pfqrh7717cv7ddv2dc8xad5-guile-3.0.9/share/guile/3.0" 
> "/gnu/store/84rvhd3j7pfqrh7717cv7ddv2dc8xad5-guile-3.0.9/share/guile/site/3.0"
>  "/gnu/store/84rvhd3j7pfqrh7717cv7ddv2dc8xad5-guile-3.0.9/share/guile/site" 
> "/gnu/store/84rvhd3j7pfqrh7717cv7ddv2dc8xad5-guile-3.0.9/share/guile" 
> "/home/simon/.guix-profile/share/guile/site/3.0" 
> "/home/simon/.config/guix/profiles/emacs/emacs/share/guile/site/3.0" 
> "/home/simon/.guix-profile/share/guile/site/3.0" 
> "/home/simon/.config/guix/profiles/emacs/emacs/share/guile/site/3.0")
>
>
> The issue is that the procedure 'search-path' returns #f.  It looks similar as
> fixed bug #42543 [1] by d10474c38d58bdc676e64336769dc2e00cdfa8ed.
>
> Here, I do not know how to avoid 'canonicalize-path' when 'search-path'
> returns #f because some relative.

[...]

>  (define (search-path* path file)
>    "Like 'search-path' but exit if FILE is not found."
> -  (let ((absolute-file-name (search-path path file)))
> +  (let ((absolute-file-name (or (search-path path file)
> +                                ;; It could be that FILE is a relative name
> +                                ;; i.e., not relative to an element of PATH.
> +                                (and (file-exists? file)
> +                                     (canonicalize-path file)))))

I think we can remove the ‘canonicalize-path’ call here since we know
that FILE denotes a valid file at that point.  (That’d avoid the extra
work ‘canonicalize-path’ does.)

Otherwise LGTM!

Thanks,
Ludo’.