zfstools: add gem dependency which is no longer in ruby per default (#543062)

pkgs/by-name/zf/zfstools/Gemfile

@@ -0,0 +1,3 @@
+source "http://rubygems.org"
+
+gem "getoptlong"

pkgs/by-name/zf/zfstools/Gemfile.lock

@@ -0,0 +1,14 @@
+GEM
+  remote: http://rubygems.org/
+  specs:
+    getoptlong (0.2.1)
+
+PLATFORMS
+  ruby
+  x86_64-linux
+
+DEPENDENCIES
+  getoptlong
+
+BUNDLED WITH
+   2.6.9

pkgs/by-name/zf/zfstools/gemset.nix

@@ -0,0 +1,12 @@
+{
+  getoptlong = {
+    groups = [ "default" ];
+    platforms = [ ];
+    source = {
+      remotes = [ "http://rubygems.org" ];
+      sha256 = "198vy9dxyzibqdbw9jg8p2ljj9iknkyiqlyl229vz55rjxrz08zx";
+      type = "gem";
+    };
+    version = "0.2.1";
+  };
+}

pkgs/by-name/zf/zfstools/package.nix

@@ -1,25 +1,31 @@
 {
   lib,
+  bundlerEnv,
   stdenv,
   fetchFromGitHub,
-  ruby,
   zfs,
   freebsd,
   makeWrapper,
 }:
+let
+  rubyEnv = bundlerEnv {
+    name = "zfstools-gems";
+    gemdir = ./.;
+  };
+in
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "zfstools";
   version = "0.3.6";
 
   src = fetchFromGitHub {
-    sha256 = "16lvw3xbmxp2pr8nixqn7lf4504zaaxvbbdnjkv4dggwd4lsdjyg";
-    rev = "v${finalAttrs.version}";
-    repo = "zfstools";
     owner = "bdrewery";
+    repo = "zfstools";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-z8umKWn8vUb2lLattbtSn4BCHD0W92hRvuL2uvrgm5o=";
   };
 
-  buildInputs = [ ruby ];
+  buildInputs = [ rubyEnv.wrappedRuby ];
   nativeBuildInputs = [ makeWrapper ];
 
   installPhase = ''
@@ -36,9 +42,8 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   meta = {
-    inherit (finalAttrs) version;
-    inherit (finalAttrs.src.meta) homepage;
     description = "OpenSolaris-compatible auto-snapshotting script for ZFS";
+    homepage = "https://github.com/bdrewery/zfstools";
     longDescription = ''
       zfstools is an OpenSolaris-like and compatible auto snapshotting script
       for ZFS, which also supports auto snapshotting mysql databases.