gnu: src: Add bash-minimal to inputs, use gexps.

* gnu/packages/version-control.scm (src)
[arguments]: Use gexps.
[inputs]: Add bash-minimal.

Change-Id: I122b0c496792a5dea731c2e70d32cba7286df0b1

gnu/packages/version-control.scm

@@ -3363,19 +3363,18 @@ (define-public src
                 "0r9i399kkagpwj08nwf1f7c6lr50xjzzgmzwyjjy6ppgcc53a809"))))
     (build-system gnu-build-system)
     (arguments
-     '(#:make-flags
-       (list (string-append "prefix=" (assoc-ref %outputs "out")))
+     (list
+      #:make-flags
+      #~(list (string-append "prefix=" #$output))
       #:phases
-       (modify-phases %standard-phases
+      #~(modify-phases %standard-phases
           (delete 'configure)           ; no 'configure' script
           (add-after 'install 'wrap-program
-           (lambda* (#:key inputs outputs #:allow-other-keys)
-             (let* ((out  (assoc-ref outputs "out"))
-                    (prog (string-append out "/bin/src"))
-                    (rcs  (assoc-ref inputs "rcs")))
+            (lambda* (#:key inputs #:allow-other-keys)
+              (let* ((prog (string-append #$output "/bin/src"))
+                     (rcs  (search-input-file inputs "bin/rcs")))
                 (wrap-program prog
-                 `("PATH" ":" prefix (,(string-append rcs "/bin"))))
-               #t)))
+                  `("PATH" ":" prefix (,(dirname rcs)))))))
           (replace 'check
             (lambda _
               (setenv "HOME" (getenv "TMPDIR"))
@@ -3386,9 +3385,10 @@ (define-public src
      ;; For testing.
      (list git perl))
     (inputs
-     `(("cssc" ,cssc)
-       ("python" ,python-wrapper)
-       ("rcs" ,rcs)))
+     (list bash-minimal
+           cssc
+           python-wrapper
+           rcs))
     (synopsis "Simple revision control")
     (home-page "http://www.catb.org/~esr/src/")
     (description