[New Package] prometheus_cpp (#5265)

packages/prometheus_cpp.rb

+require 'package'
+
+class Prometheus_cpp < Package
+  description 'Prometheus Client Library for Modern C++'
+  homepage 'https://github.com/jupp0r/prometheus-cpp/'
+  version '0.12.1'
+  compatibility 'all'
+  source_url 'https://github.com/jupp0r/prometheus-cpp/releases/download/v0.12.1/prometheus-cpp-with-submodules.tar.gz'
+  source_sha256 'f116cee772df7bf23fc89fb71c13ad4420601e304a382d77da725da0d0dc4cac'
+
+  depends_on 'zstd'
+  depends_on 'civetweb'
+  depends_on 'gtest' => :build
+  depends_on 'benchmark' => :build
+  
+  def self.build
+    Dir.mkdir "builddir"
+    Dir.chdir "builddir" do
+      system "cmake -G 'Ninja' #{CREW_CMAKE_OPTIONS} \
+              -DENABLE_PULL=ON \
+		          -DENABLE_PUSH=ON \
+		          -DENABLE_COMPRESSION=ON \
+		          -DENABLE_TESTING=ON \
+		          -DBUILD_SHARED_LIBS=ON \
+		          -DUSE_THIRDPARTY_LIBRARIES=OFF .."
+      system "ninja"
+    end
+  end
+
+  def self.install
+    system "DESTDIR=#{CREW_DEST_DIR} ninja -C builddir install"
+  end
+
+  def self.check
+    system "ninja -C builddir test"
+  end
+end