Merge pull request #1599 from uberhacker/add-librsync-package

Add librsync package

packages/librsync.rb

+require 'package'
+
+class Librsync < Package
+  description 'remote delta-compression library'
+  homepage 'https://librsync.github.io/'
+  version '2.0.1'
+  source_url 'https://github.com/librsync/librsync/archive/v2.0.1.tar.gz'
+  source_sha256 '6fce69041aa4fc72a21f1ab280a7299b82df2b1fa0a25d8695fd527e6752625e'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  depends_on 'cmake' => :build
+  depends_on 'zlibpkg'
+
+  def self.build
+    system "cmake . -DPREFIX=#{CREW_PREFIX} -DCMAKE_INSTALL_LIBDIR=#{CREW_DEST_LIB_PREFIX} -DCMAKE_C_FLAGS='-fPIC'"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end