Add uvw (#744)

packages/u/uvw/xmake.lua

@@ -0,0 +1,33 @@
+package("uvw")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/skypjack/uvw")
+    set_description("Header-only, event based, tiny and easy to use libuv wrapper in modern C++")
+
+    add_urls("https://github.com/skypjack/uvw.git")
+
+    add_versions("2.10.0", "v2.10.0_libuv_v1.42")
+
+    add_deps("cmake", "libuv")
+
+    on_install("macosx", "linux", "iphoneos", "android@linux,macosx", "mingw@linux,macosx", "windows", function (package)
+        local configs = {}
+        table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:debug() and "Debug" or "Release"))
+        if package:config("shared") then
+            table.insert(configs, "-DBUILD_SHARED_LIBS=on")
+        else
+            table.insert(configs, "-DBUILD_SHARED_LIBS=off")
+        end
+        import("package.tools.cmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({
+            test = [[
+            #include <uvw.hpp>
+            void test() {
+                auto loop = uvw::Loop::getDefault();
+            }
+            ]]},
+            {configs = {languages = "c++17"}
+        }))
+    end)