mrbgems: Add mruby-zmq

overlay/mruby-builder/mrbgems/default.nix

@@ -1,4 +1,12 @@
-{ stdenvNoCC, lib, fetchFromGitHub, fetchpatch, libffi }:
+{ stdenvNoCC
+, lib
+, fetchFromGitHub
+, fetchpatch
+
+, libffi
+, pkg-config
+, zeromq
+}:
 
 let
   inherit (lib) licenses;
@@ -343,4 +351,42 @@ rec {
 
     meta.licenses = licenses.mit;
   };
+
+  mruby-zmq = mkGem {
+    src = fetchFromGitHub {
+      repo = "mruby-zmq";
+      owner = "zeromq";
+      rev = "39b6dab7cb944595064ca3e9376637024d3bf483";
+      sha256 = "03n9890wx18v7pwnk5w8s10l7yij6hyj8y5q4jf296k56dr4g01m";
+    };
+
+    patches = [
+      (fetchpatch {
+        url = "https://github.com/zeromq/mruby-zmq/pull/16.patch";
+        sha256 = "1m63yl84hg80whqpr3yznk06yalaasiszwm3pjvsr2di8gyi0bm5";
+      })
+      ./mruby-zmq/0001-Work-around-missing-pthread.patch
+      ./mruby-zmq/0001-HACK-cross-build-is-not-special-with-Nixpkgs.patch
+    ];
+
+    gemBuildInputs = [
+      (zeromq.override {
+        enableDrafts = true;
+      })
+    ];
+
+    gemNativeBuildInputs = [
+      pkg-config
+    ];
+
+    requiredGems = [
+      mruby-errno
+      mruby-proc-irep-ext
+      mruby-simplemsgpack
+      mruby-pack
+      mruby-env
+    ];
+
+    meta.licenses = licenses.mpl20;
+  };
 }

overlay/mruby-builder/mrbgems/mruby-zmq/0001-HACK-cross-build-is-not-special-with-Nixpkgs.patch

@@ -0,0 +1,39 @@
+From c959a7e964c2f203e6a46405feb3bd036d460f5f Mon Sep 17 00:00:00 2001
+From: Samuel Dionne-Riel <samuel@dionne-riel.com>
+Date: Tue, 27 Oct 2020 00:26:16 -0400
+Subject: [PATCH] =?UTF-8?q?[HACK]=C2=A0cross-build=20is=20not=20special=20?=
+ =?UTF-8?q?with=20Nixpkgs?=
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+---
+ mrbgem.rake | 12 ------------
+ 1 file changed, 12 deletions(-)
+
+diff --git a/mrbgem.rake b/mrbgem.rake
+index ff42825..30fd90d 100644
+--- a/mrbgem.rake
++++ b/mrbgem.rake
+@@ -31,18 +31,6 @@ MRuby::Gem::Specification.new('mruby-zmq') do |spec|
+   end
+   if spec.build.toolchains.include? 'visualcpp'
+     spec.linker.libraries << 'libzmq'
+-  elsif build.is_a?(MRuby::CrossBuild)
+-    unless File.exists?("#{spec.build_dir}/lib/libzmq.a")
+-      sh "cd #{spec.dir}/libzmq && ./autogen.sh && mkdir -p #{spec.build_dir}/build && cd #{spec.build_dir}/build && #{spec.dir}/libzmq/configure CC=\"#{spec.cc.command}\" CFLAGS=\"#{spec.cc.flags.join(' ')}\" LDFLAGS=\"#{spec.linker.flags.join(' ')}\" CXX=\"#{spec.cxx.command}\" CXXFLAGS=\"#{spec.cxx.flags.join(' ')}\" --host=#{build.host_target} --build=#{build.build_target} --disable-shared --enable-static --without-docs --prefix=#{spec.build_dir} && make -j4 && make install"
+-    end
+-    spec.linker.flags_before_libraries << "\"#{spec.build_dir}/lib/libzmq.a\" -pthread"
+-    spec.linker.libraries << 'stdc++'
+-    spec.cc.include_paths << "#{spec.build_dir}/include"
+-    spec.cxx.include_paths << "#{spec.build_dir}/include"
+-    build.cc.include_paths << "#{spec.build_dir}/include"
+-    build.cxx.include_paths << "#{spec.build_dir}/include"
+-    spec.cxx.defines << 'ZMQ_BUILD_DRAFT_API=1'
+-    spec.cc.defines << 'ZMQ_BUILD_DRAFT_API=1'
+   else
+     `pkg-config --cflags libzmq 2>/dev/null`.split("\s").each do |cflag|
+       spec.cxx.flags << cflag
+-- 
+2.28.0
+

overlay/mruby-builder/mrbgems/mruby-zmq/0001-Work-around-missing-pthread.patch

@@ -0,0 +1,24 @@
+From 772fade0232b98460ba9557eba703593226ce804 Mon Sep 17 00:00:00 2001
+From: Samuel Dionne-Riel <samuel@dionne-riel.com>
+Date: Fri, 23 Oct 2020 20:59:10 -0400
+Subject: [PATCH] Work around missing -pthread
+
+It is unknown why `pkg-config` does not return `-pthread` for zeromq.
+
+---
+ mrbgem.rake | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/mrbgem.rake b/mrbgem.rake
+index ff42825..3b7ebdc 100644
+--- a/mrbgem.rake
++++ b/mrbgem.rake
+@@ -75,4 +75,5 @@ MRuby::Gem::Specification.new('mruby-zmq') do |spec|
+       spec.cc.defines << 'ZMQ_BUILD_DRAFT_API=1'
+     end
+   end
++  spec.linker.flags_before_libraries << "-pthread"
+ end
+-- 
+2.28.0
+