gnu: Add rust-rustyline-7.

* gnu/packages/crates-io.scm (rust-rustyline-7): New variable.
(rust-rustyline-6): Inherit from above.

gnu/packages/crates-io.scm

@@ -34237,8 +34237,44 @@ sub-processes using a fork-like interface.")
         ("rust-tempfile" ,rust-tempfile-3)
         ("rust-wait-timeout" ,rust-wait-timeout-0.2))))))
 
+(define-public rust-rustyline-7
+  (package
+    (name "rust-rustyline")
+    (version "7.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "rustyline" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1v1czmy3ir7d06xldp8bg94l97hrm15hcgdxxkq3cwbizhdk09w2"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-bitflags" ,rust-bitflags-1)
+        ("rust-cfg-if" ,rust-cfg-if-1)
+        ("rust-dirs-next" ,rust-dirs-next-2)
+        ("rust-fs2" ,rust-fs2-0.4)
+        ("rust-libc" ,rust-libc-0.2)
+        ("rust-log" ,rust-log-0.4)
+        ("rust-memchr" ,rust-memchr-2)
+        ("rust-nix" ,rust-nix-0.19)
+        ("rust-scopeguard" ,rust-scopeguard-1)
+        ("rust-unicode-segmentation" ,rust-unicode-segmentation-1)
+        ("rust-unicode-width" ,rust-unicode-width-0.1)
+        ("rust-utf8parse" ,rust-utf8parse-0.2)
+        ("rust-winapi" ,rust-winapi-0.3)
+        ("skim" ,skim-0.7))))
+    (home-page "https://github.com/kkawakam/rustyline")
+    (synopsis "Readline implementation in Rust")
+    (description
+     "Rustyline, a readline implementation based on the linenoise package.")
+    (license license:expat)))
+
 (define-public rust-rustyline-6
   (package
+    (inherit rust-rustyline-7)
     (name "rust-rustyline")
     (version "6.3.0")
     (source
@@ -34250,7 +34286,6 @@ sub-processes using a fork-like interface.")
         (sha256
          (base32
           "04w4k0nwsra84h90rvwkr6vmjp3nshjqaj9rakfym8qr09xmw3bg"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:cargo-inputs
        (("rust-cfg-if" ,rust-cfg-if-0.1)
@@ -34270,12 +34305,7 @@ sub-processes using a fork-like interface.")
         ("rust-doc-comment" ,rust-doc-comment-0.3)
         ("rust-env-logger" ,rust-env-logger-0.7)
         ("rust-rustyline-derive" ,rust-rustyline-derive-0.3)
-        ("rust-tempfile" ,rust-tempfile-3))))
-    (home-page "https://github.com/kkawakam/rustyline")
-    (synopsis "Readline implementation in Rust")
-    (description
-     "Rustyline, a readline implementation based on the linenoise package.")
-    (license license:expat)))
+        ("rust-tempfile" ,rust-tempfile-3))))))
 
 (define-public rust-rustyline-derive-0.3
   (package