rocket: add package (#4392)

packages/r/rocket/xmake.lua

@@ -0,0 +1,25 @@
+package("rocket")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/tripleslash/rocket")
+    set_description("Fast single header signal/slots library for C++")
+
+    add_urls("https://github.com/tripleslash/rocket/archive/348869fcda83f8b8b521c7654f83fea07ebe7a0a.tar.gz",
+             "https://github.com/tripleslash/rocket.git")
+
+    add_versions("2020.06.03", "de03b9c7f9b9478cfaa60683f95a7b0773dc0929d14e510c23f53b3804cc921f")
+
+    on_install(function (package)
+        io.replace("rocket.hpp", "return thread_id != std::thread::id{}", "return !(thread_id == std::thread::id{})", {plain = true})
+        io.replace("rocket.hpp", "&& thread_id != std::this_thread::get_id();", "&& !(thread_id == std::this_thread::get_id());", {plain = true})
+        os.cp("rocket.hpp", package:installdir("include"))
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void test() {
+                rocket::signal<void()> thread_unsafe_signal;
+                rocket::thread_safe_signal<void()> thread_safe_signal;
+                thread_unsafe_signal.connect([]() {});
+            }
+        ]]}, {configs = {languages = "c++17"}, includes = "rocket.hpp"}))
+    end)