bug#58046: Poedit fails to open PO files

[paren--- via Bug reports for GNU Guix <bug-guix@gnu.org>]

On Sat Sep 24, 2022 at 8:02 PM BST, Luis Felipe via Bug reports for GNU Guix wrote:
> WORKAROUND
>
> Start Poedit in a guix shell that adds gettext:
>
> guix shell poedit gettext
> poedit
>
> Then, you can open the PO files normally.
>
> So it seems the package definition for Poedit is missing gettext as a run-time dependency (?).

What might be referred to as a "run-time dependency" is called a
"propagated input" in Guix, where a dependency of X is installed
whenever X itself is installed. They are generally considered
undesirable and should be avoided, so when we're faced with this
sort of problem we usually do:

  (inputs (list gettext))

and add a phase:

  (add-after 'unpack 'patch-invocations
    (lambda* (#:key inputs #:allow-other-keys)
      (substitute* "src/foo/bar.c"
        (("\"msgfmt\"")
         (string-append
          "\""
          (search-input-file inputs "bin/msgfmt")
          "\"")))))

    -- (