Subject: [PATCH 29/39] gnu: Add ocaml-protocol-version-header.

From: Csepp <[email-masked]>
Date: Mon, 9 Jan 2023 01:35:19 +0100

From: raingloom <[email-masked]>

* gnu/packages/ocaml.scm (ocaml-protocol-version-header): New variable.
---
 gnu/packages/ocaml.scm | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index 9f05552c15..64d7c8065a 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -6846,6 +6846,29 @@ (define-public ocaml4.07-bin-prot
                  license:asl2.0
                  license:bsd-3)))))
 
+(define-public ocaml-protocol-version-header
+  (package
+    (name "ocaml-protocol-version-header")
+    (version "0.15.0")
+    (source (origin
+              (method url-fetch)
+              (uri
+               "https://ocaml.janestreet.com/ocaml-core/v0.15/files/protocol_version_header-v0.15.0.tar.gz")
+              (sha256
+               (base32
+                "1izks6hxqd4gjxmwiv5ng52js8jbccl5hmyrvdqznjycp9ky9i6h"))))
+    (build-system dune-build-system)
+    (propagated-inputs (list ocaml-core ocaml-ppx-jane))
+    (properties `((upstream-name . "protocol_version_header")))
+    (home-page "https://github.com/janestreet/protocol_version_header")
+    (synopsis "Protocol versioning")
+    (description
+     "This library offers a lightweight way for applications protocols to
+version themselves.  The more protocols that add themselves to
+@code{Known_protocol}, the nicer error messages we will get when connecting to
+a service while using the wrong protocol.")
+    (license license:expat)))
+
 (define-public ocaml-octavius
   (package
     (name "ocaml-octavius")
-- 
2.38.1