gnu: Add cl-adopt.

* gnu/packages/lisp-xyz.scm (cl-adopt, ecl-adopt, sbcl-adopt): New variables.

Signed-off-by: Guillaume Le Vaillant <glv@posteo.net>

gnu/packages/lisp-xyz.scm

@@ -708,6 +708,36 @@ (define-public ecl-command-line-arguments
 (define-public cl-command-line-arguments
   (sbcl-package->cl-source-package sbcl-command-line-arguments))
 
+(define-public sbcl-adopt
+  (package
+    (name "sbcl-adopt")
+    (version "1.2.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/sjl/adopt")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name "cl-adopt" version))
+       (sha256
+        (base32 "16kzkai96qk7vmclp8wxc9aghhnisw8gg9s7hra68300bgj86wzr"))))
+    (build-system asdf-build-system/sbcl)
+    (native-inputs (list sbcl-1am))
+    (inputs (list sbcl-bobbin sbcl-split-sequence))
+    (home-page "https://hg.stevelosh.com/adopt")
+    (synopsis "Common Lisp option parsing library")
+    (description
+     "@acronym{ADOPT, A Damn OPTion} is a simple UNIX-style option parser in
+Common Lisp, heavily influenced by Python's @code{optparse} and
+@code{argparse}.")
+    (license license:expat)))
+
+(define-public ecl-adopt
+  (sbcl-package->ecl-package sbcl-adopt))
+
+(define-public cl-adopt
+  (sbcl-package->cl-source-package sbcl-adopt))
+
 (define-public sbcl-cl-irc
   (let ((commit "963823537c7bfcda2edd4c44d172192da6722175")
         (revision "0"))