From fcd75613ea1f8ae73ad6c0f70b18197584a94e2e Mon Sep 17 00:00:00 2001
From: Alexander Bantyev <balsoft@balsoft.ru>
Date: Sat, 16 Jul 2022 14:43:23 +0400
Subject: [PATCH] opam2json: init at v0.2

---
 .../tools/ocaml/opam2json/default.nix         | 25 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  2 ++
 2 files changed, 27 insertions(+)
 create mode 100644 pkgs/development/tools/ocaml/opam2json/default.nix

diff --git a/pkgs/development/tools/ocaml/opam2json/default.nix b/pkgs/development/tools/ocaml/opam2json/default.nix
new file mode 100644
index 000000000000..198a5f575eb4
--- /dev/null
+++ b/pkgs/development/tools/ocaml/opam2json/default.nix
@@ -0,0 +1,25 @@
+{ lib, stdenv, fetchFromGitHub, opam-installer, ocamlPackages }:
+stdenv.mkDerivation rec {
+  pname = "opam2json";
+  version = "0.2";
+
+  src = fetchFromGitHub {
+    owner = "tweag";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "fe8bm/V/4r2iNxgbitT2sXBqDHQ0GBSnSUSBg/1aXoI=";
+  };
+
+  buildInputs = with ocamlPackages; [ yojson opam-file-format cmdliner ];
+  nativeBuildInputs = with ocamlPackages; [ ocaml findlib opam-installer ];
+
+  preInstall = ''export PREFIX="$out"'';
+
+  meta = with lib; {
+    platforms = platforms.all;
+    description = "convert opam file syntax to JSON";
+    maintainers = [ maintainers.balsoft ];
+    license = licenses.gpl3;
+    homepage = "https://github.com/tweag/opam2json";
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f5f1a48ba964..7be1a321f144 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -13938,6 +13938,8 @@ with pkgs;
 
   opam-installer = callPackage ../development/tools/ocaml/opam/installer.nix { };
 
+  opam2json = callPackage ../development/tools/ocaml/opam2json { };
+
   wrapWatcom = callPackage ../development/compilers/open-watcom/wrapper.nix { };
   open-watcom-v2-unwrapped = callPackage ../development/compilers/open-watcom/v2.nix { };
   open-watcom-v2 = wrapWatcom open-watcom-v2-unwrapped { };