gnu: libsecret: Update to 0.20.5, use gexps and remove input labels.

* gnu/packages/gnome.scm (libsecret): Update to 0.20.5.
[outputs]: Delete doc output.
[configure-flags]: Use gexps.  Remove --with-html-dir and add -Dgtk_doc.
[phases]{disable-problematic-tests}: New phase.
{check}: Override and move after the install phase.
[inputs]: Move docbook-xsl and libxml2 to...
[native-inputs]: ... here.  Remove input labels.  Add dbus, docbook-xml-4.2,
python, python-dbus and python-pygobject.

gnu/packages/gnome.scm

@@ -4997,7 +4997,7 @@ and the GLib main loop, to integrate well with GNOME applications.")
 (define-public libsecret
   (package
     (name "libsecret")
-    (version "0.20.4")
+    (version "0.20.5")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -5006,28 +5006,49 @@ and the GLib main loop, to integrate well with GNOME applications.")
                     "libsecret-" version ".tar.xz"))
               (sha256
                (base32
-                "0a4xnfmraxchd9cq5ai66j12jv2vrgjmaaxz25kl031jvda4qnij"))))
-    (build-system gnu-build-system)
-    (outputs '("out" "doc"))
+                "0k9bs47rzb3dwvznb4179d6nw7rbzjdyd4y8hx6vazfd1wscxcrz"))))
+    (build-system meson-build-system)
     (arguments
-     `(#:tests? #f ; FIXME: Testing hangs.
+     (list
       #:configure-flags
-       (list (string-append "--with-html-dir="
-                            (assoc-ref %outputs "doc")
-                            "/share/gtk-doc/html"))))
+      #~(list "-Dgtk_doc=false")        ;requires gi-docgen
+      #:phases
+      #~(modify-phases %standard-phases
+          (add-after 'unpack 'disable-problematic-tests
+            (lambda _
+              (substitute* "libsecret/meson.build"
+                ;; The test-collection test fails non-deterministically (see:
+                ;; https://gitlab.gnome.org/GNOME/libsecret/-/issues/80).
+                ((".*'test-collection',.*") ""))))
+          (delete 'check)
+          (add-after 'install 'check
+            (lambda* (#:key tests? test-options #:allow-other-keys)
+              (when tests?
+                (setenv "HOME" "/tmp")
+                (setenv "XDG_DATA_DIRS" ;for /org/freedesktop/secrets/collection
+                        (string-append #$output "/share:"
+                                       (getenv "XDG_DATA_DIRS")))
+                (apply invoke "dbus-run-session" "--"
+                       "meson" "test" "--print-errorlogs" "-t" "0"
+                       test-options)))))))
     (native-inputs
-     `(("gettext" ,gettext-minimal)
-       ("glib:bin" ,glib "bin") ; for gdbus-codegen, etc.
-       ("gobject-introspection" ,gobject-introspection)
-       ("pkg-config" ,pkg-config)
-       ("vala" ,vala)
-       ("xsltproc" ,libxslt)))
+     (list dbus
+           docbook-xml-4.2
+           docbook-xsl
+           gettext-minimal
+           `(,glib "bin")               ;for gdbus-codegen, etc.
+           gobject-introspection
+           libxml2                      ;for XML_CATALOG_FILES
+           libxslt
+           pkg-config
+           python
+           python-dbus
+           python-pygobject
+           vala))
     (propagated-inputs
-     (list glib)) ; required by libsecret-1.pc
+     (list glib))                       ;required by libsecret-1.pc
     (inputs
-     ;; The ‘build’ phase complains about missing docbook-xml-4.2 but adding it
-     ;; doesn't seem to affect the build result.
-     (list docbook-xsl libgcrypt libxml2)) ; for XML_CATALOG_FILES
+     (list libgcrypt))
     (home-page "https://wiki.gnome.org/Projects/Libsecret/")
     (synopsis "GObject bindings for \"Secret Service\" API")
     (description