gnu: ert-runner: Adjust ert-runner wrapper to honor EMACSLOADPATH.

* gnu/packages/emacs.scm (ert-runner): Use 'prefix instead of '= for setting
the EMACSLOADPATH environment variable. Reuse the already computed
EMACSLOADPATH for wrap-program. Specify the dependencies directly in the
inputs field.

Signed-off-by: Arun Isaac <arunisaac@systemreboot.net>

gnu/packages/emacs.scm

@@ -6176,64 +6176,49 @@ (define-public emacs-commander
 ;; Tests for ert-runner have a circular dependency with ecukes, and therefore
 ;; cannot be run
 (define-public ert-runner
-  (let ((dependencies
-         `(("emacs-ansi" ,emacs-ansi)
-           ("emacs-commander" ,emacs-commander)
-           ("emacs-dash" ,emacs-dash)
-           ("emacs-f" ,emacs-f)
-           ("emacs-s" ,emacs-s)
-           ("emacs-shut-up" ,emacs-shut-up))))
-    (package
-      (name "ert-runner")
-      (version "0.7.0")
-      (source
-       (origin
-         (method url-fetch)
-         (uri (string-append "https://github.com/rejeep/ert-runner.el/archive/v"
-                             version ".tar.gz"))
-         (file-name (string-append name "-" version ".tar.gz"))
-         (sha256
-          (base32
-           "1657nck9i96a4xgl8crfqq0s8gflzp21pkkzwg6m3z5npjxklgwp"))))
-      (build-system emacs-build-system)
-      (inputs dependencies)
-      (arguments
-       `(#:phases
-         (modify-phases %standard-phases
-           (add-after 'install 'install-executable
-             (lambda* (#:key inputs outputs #:allow-other-keys)
-               (let ((out (assoc-ref outputs "out")))
-                 (substitute* "bin/ert-runner"
-                   (("ERT_RUNNER=\"\\$\\(dirname \\$\\(dirname \\$0\\)\\)")
-                    (string-append "ERT_RUNNER=\"" out
-                                   "/share/emacs/site-lisp/guix.d/"
-                                   ,name "-" ,version)))
-                 (install-file "bin/ert-runner" (string-append out "/bin"))
-                 (wrap-program (string-append out "/bin/ert-runner")
-                   (list "EMACSLOADPATH" ":" '=
-                         (append
-                          ,(match dependencies
-                             (((labels packages) ...)
-                              `(map (lambda (label package version)
-                                      (string-append (assoc-ref inputs label)
-                                                     "/share/emacs/site-lisp/guix.d/"
-                                                     (string-drop package 6)
-                                                     "-" version))
-                                    ',labels
-                                    ',(map package-name packages)
-                                    ',(map package-version packages))))
-                          ;; empty element to include the default load path as
-                          ;; determined by emacs' standard initialization
-                          ;; procedure
-                          (list ""))))
-                 #t))))
-         #:include (cons* "^reporters/.*\\.el$" %default-include)))
-      (home-page "https://github.com/rejeep/ert-runner.el")
-      (synopsis "Opinionated Ert testing workflow")
-      (description "@code{ert-runner} is a tool for Emacs projects tested
+  (package
+    (name "ert-runner")
+    (version "0.7.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/rejeep/ert-runner.el/archive/v"
+                           version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1657nck9i96a4xgl8crfqq0s8gflzp21pkkzwg6m3z5npjxklgwp"))))
+    (build-system emacs-build-system)
+    (inputs
+     `(("emacs-ansi" ,emacs-ansi)
+       ("emacs-commander" ,emacs-commander)
+       ("emacs-dash" ,emacs-dash)
+       ("emacs-f" ,emacs-f)
+       ("emacs-s" ,emacs-s)
+       ("emacs-shut-up" ,emacs-shut-up)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'install 'install-executable
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let ((out (assoc-ref outputs "out")))
+               (substitute* "bin/ert-runner"
+                 (("ERT_RUNNER=\"\\$\\(dirname \\$\\(dirname \\$0\\)\\)")
+                  (string-append "ERT_RUNNER=\"" out
+                                 "/share/emacs/site-lisp/guix.d/"
+                                 ,name "-" ,version)))
+               (install-file "bin/ert-runner" (string-append out "/bin"))
+               (wrap-program (string-append out "/bin/ert-runner")
+                 (list "EMACSLOADPATH" ":" 'prefix
+                       (string-split (getenv "EMACSLOADPATH") #\:)))
+               #t))))
+       #:include (cons* "^reporters/.*\\.el$" %default-include)))
+    (home-page "https://github.com/rejeep/ert-runner.el")
+    (synopsis "Opinionated Ert testing workflow")
+    (description "@code{ert-runner} is a tool for Emacs projects tested
 using ERT.  It assumes a certain test structure setup and can therefore make
 running tests easier.")
-      (license license:gpl3+))))
+    (license license:gpl3+)))
 
 (define-public emacs-disable-mouse
   (package