>From 9d67b6438d8e5c42d6d4e9c8eca46038c80f05ea Mon Sep 17 00:00:00 2001
From: Artyom Bologov <aartaka@protonmail.com>
Date: Wed, 24 Jan 2024 23:20:52 +0400
Subject: [PATCH] gnu: Add guile-lmdb.

* gnu/packages/guile-xyz.scm (guile-lmdb): New variable.
---
 gnu/packages/guile-xyz.scm | 41 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm
index 9c4c308d05..08f4a67d07 100644
--- a/gnu/packages/guile-xyz.scm
+++ b/gnu/packages/guile-xyz.scm
@@ -2012,6 +2012,47 @@ (define-public guile-dbd-mysql
 for MySQL.")
     (license license:gpl2+)))
 
+(define-public guile-lmdb
+  (package
+    (name "guile-lmdb")
+    (version "0.0.1")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/aartaka/guile-lmdb")
+                    (commit "438143ca9ba157faec6f4c2740092c31c733fbfe")))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0p43c8ppbhzpi944in0z2jqr7acl8pm7s1x0p5f0idqda6n6f828"))))
+    (build-system guile-build-system)
+    (arguments
+     '(#:source-directory "modules"
+       #:phases (modify-phases %standard-phases
+                  (add-before 'build 'substitute-lmdb-so
+                    (lambda* (#:key inputs #:allow-other-keys)
+                      (let ((lmdb (string-append (assoc-ref inputs "lmdb")
+                                                 "/lib/liblmdb.so")))
+                        (substitute*
+                            '("modules/lmdb/lmdb.scm")
+                          (("liblmdb.so")
+                           lmdb))
+                        #t))))))
+    (native-inputs (list guile-3.0))
+    (inputs (list guile-3.0 lmdb))
+    (home-page "https://github.com/aartaka/guile-lmdb")
+    (synopsis "Bindings for LMDB (Lightning Memory-Mapped Database) in Guile.")
+    (description "Scheme wrapper around liblmdb.so.
+Most name are the same as LMDB ones, except for prefix absence.
+Several conveniences are added on top:
+@itemize
+@item @code{call-with-env-and-txn} and @code{call-with-cursor} wrappers.
+@item @code{for-cursor} procedure for cursor iteration.
+@item @code{val} and @code{stat} types.
+@item Error signaling instead of integer return values.
+@end itemize\n")
+    (license license:gpl3+)))
+
 (define-public guile-config
   (package
     (name "guile-config")
-- 
2.41.0