gnu: Add elixir-db-connection.

* gnu/packages/databases.scm: New file.
(elixir-db-connection): New variable.
* gnu/local.mk: Add it.

Change-Id: I5cce923ba48e517bb4651c9596a8c52d622f59d4
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/local.mk

@@ -261,6 +261,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/electronics.scm			\
   %D%/packages/elf.scm				\
   %D%/packages/elixir.scm			\
+  %D%/packages/elixir-databases.scm		\
   %D%/packages/elixir-markup.scm		\
   %D%/packages/elixir-xyz.scm			\
   %D%/packages/elm.scm				\

gnu/packages/elixir-databases.scm

@@ -0,0 +1,55 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2025 Giacomo Leidi <goodoldpaul@autistici.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages elixir-databases)
+  #:use-module (gnu packages erlang-xyz)
+  #:use-module (gnu packages elixir-xyz)
+  #:use-module (guix build-system mix)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix gexp)
+  #:use-module ((guix licenses)
+                #:prefix license:)
+  #:use-module (guix packages))
+
+(define-public elixir-db-connection
+  (package
+    (name "elixir-db-connection")
+    (version "2.8.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (hexpm-uri "db_connection" version))
+       (sha256
+        (base32 "1zd8kp85wh7bbzr5x4kc75l53r5q9xwrhfz04vrpd793kd43s6m6"))))
+    (build-system mix-build-system)
+    (arguments
+     (list
+      ;; Tests require a db process
+      #:tests? #f
+      #:build-per-environment #f))
+    (propagated-inputs (list erlang-telemetry))
+    (synopsis
+     "Database connection behaviour")
+    (description
+     "This package provides @code{elixir-db-connection}, a library implementing
+database connection behaviour and database connection pool.  It is designed for
+handling transaction, prepare/execute, cursors and client process
+describe/encode/decode.")
+    (home-page "https://hexdocs.pm/db_connection/")
+    (license license:asl2.0)))