gnu: Add guile-kolam.

* gnu/packages/guile-xyz.scm (guile-kolam): New variable.

gnu/packages/guile-xyz.scm

@@ -17,7 +17,7 @@
 ;;; Copyright © 2017 Nikita <nikita@n0.is>
 ;;; Copyright © 2017, 2018, 2021 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2018, 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
-;;; Copyright © 2018, 2019, 2020, 2021 Arun Isaac <arunisaac@systemreboot.net>
+;;; Copyright © 2018, 2019, 2020, 2021, 2022 Arun Isaac <arunisaac@systemreboot.net>
 ;;; Copyright © 2018 Pierre-Antoine Rouby <pierre-antoine.rouby@inria.fr>
 ;;; Copyright © 2018 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2019 swedebugia <swedebugia@riseup.net>
@@ -4843,3 +4843,30 @@ (define-public guile-schemetran
 of numbers.  Scheme is great at expressing your coding thoughts.  This project
 is an attempt to combine both into something useful.")
       (license license:asl2.0))))
+
+(define-public guile-kolam
+  (package
+    (name "guile-kolam")
+    (version "0.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://kolam.systemreboot.net/releases/kolam-"
+                           version ".tar.lz"))
+       (sha256
+        (base32
+         "083r3n3wvzysa9jhlwjj1xppdm6ja56rkizr6hvj4q1806v8n6mn"))))
+    (build-system gnu-build-system)
+    (arguments
+     '(#:make-flags '("GUILE_AUTO_COMPILE=0"))) ; to prevent guild warnings
+    (native-inputs
+     (list guile-3.0 lzip))
+    (propagated-inputs
+     (list guile-json-4))
+    (home-page "https://kolam.systemreboot.net")
+    (synopsis "GraphQL implementation for Scheme")
+    (description "@code{guile-kolam} is a GraphQL implementation for Scheme.  kolam
+features a parser to parse and serialize GraphQL documents, a type system to
+create GraphQL schemas, an execution engine to execute GraphQL queries, and a
+HTTP handler to implement a HTTP GraphQL endpoint.")
+    (license license:agpl3+)))