uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/servers/web-apps/discourse/plugins/discourse-prometheus/Gemfile

@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+# gem "rails"
+gem 'prometheus_exporter', File.read(File.expand_path("../prometheus_exporter_version", __FILE__)).strip

pkgs/servers/web-apps/discourse/plugins/discourse-prometheus/Gemfile.lock

@@ -0,0 +1,13 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    prometheus_exporter (0.5.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  prometheus_exporter (= 0.5.0)
+
+BUNDLED WITH
+   2.3.9

pkgs/servers/web-apps/discourse/plugins/discourse-prometheus/default.nix

@@ -0,0 +1,26 @@
+{ lib, stdenv, mkDiscoursePlugin, fetchFromGitHub }:
+
+ mkDiscoursePlugin {
+  bundlerEnvArgs.gemdir = ./.;
+  name = "discourse-prometheus";
+  src = fetchFromGitHub {
+    owner = "discourse";
+    repo = "discourse-prometheus";
+    rev = "43536e4a4977718972a673dc2475ae07df9a0a45";
+    sha256 = "sha256-7sQldPLY7YW/sr4WBHWxJVvhvRK0LwO3+52HAIJFvY4=";
+  };
+
+  patches = [
+    # The metrics collector tries to run git to get the commit id but fails
+    # because we don't run Discourse from a Git repository.
+    ./no-git-version.patch
+    ./spec-import-fix-abi-version.patch
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/discourse/discourse-prometheus";
+    maintainers = with maintainers; [ dpausp ];
+    license = licenses.mit;
+    description = "Official Discourse Plugin for Prometheus Monitoring";
+  };
+}

pkgs/servers/web-apps/discourse/plugins/discourse-prometheus/gemset.nix

@@ -0,0 +1,12 @@
+{
+  prometheus_exporter = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1kmabnxz466zqnyqlzc693ny4l7i0rxvmc0znswvizc0zg4pri80";
+      type = "gem";
+    };
+    version = "0.5.0";
+  };
+}

pkgs/servers/web-apps/discourse/plugins/discourse-prometheus/no-git-version.patch

@@ -0,0 +1,36 @@
+diff --git a/lib/internal_metric/global.rb b/lib/internal_metric/global.rb
+index 682571b..7bdd431 100644
+--- a/lib/internal_metric/global.rb
++++ b/lib/internal_metric/global.rb
+@@ -30,30 +30,7 @@ module DiscoursePrometheus::InternalMetric
+       @active_app_reqs = 0
+       @queued_app_reqs = 0
+       @fault_logged = {}
+-
+-      begin
+-        @@version = nil
+-
+-        out, error, status = Open3.capture3('git rev-parse HEAD')
+-
+-        if status.success?
+-          @@version ||= out.chomp
+-        else
+-          raise error
+-        end
+-      rescue => e
+-        if defined?(::Discourse)
+-          Discourse.warn_exception(e, message: "Failed to calculate discourse_version_info metric")
+-        else
+-          STDERR.puts "Failed to calculate discourse_version_info metric: #{e}\n#{e.backtrace.join("\n")}"
+-        end
+-
+-        @@retries ||= 10
+-        @@retries -= 1
+-        if @@retries < 0
+-          @@version = -1
+-        end
+-      end
++      @@version = -1
+     end
+ 
+     def collect

pkgs/servers/web-apps/discourse/plugins/discourse-prometheus/prometheus_exporter_version

@@ -0,0 +1 @@
+0.5.0

pkgs/servers/web-apps/discourse/plugins/discourse-prometheus/spec-import-fix-abi-version.patch

@@ -0,0 +1,16 @@
+diff --git a/bin/collector b/bin/collector
+index 4fec65e..e59eac7 100755
+--- a/bin/collector
++++ b/bin/collector
+@@ -3,8 +3,10 @@
+ 
+ Process.setproctitle("discourse prometheus-collector")
+ 
++# We need the ABI version {MAJOR}.{MINOR}.0 here.
++abi_version = ENV['GEM_PATH'].split("/")[-1]
+ version = File.read(File.expand_path("../../prometheus_exporter_version", __FILE__)).strip
+-spec_file = File.expand_path("../../gems/#{RUBY_VERSION}/specifications/prometheus_exporter-#{version}.gemspec", __FILE__)
++spec_file = File.expand_path("../../gems/#{abi_version}/specifications/prometheus_exporter-#{version}.gemspec", __FILE__)
+ 
+ spec = Gem::Specification.load spec_file
+ spec.activate