watcher: add package (#2708)

* watcher: add package

* disable plat

* disable plat

packages/w/watcher/xmake.lua

@@ -0,0 +1,30 @@
+package("watcher")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/e-dant/watcher")
+    set_description("Filesystem watcher. Works anywhere. Simple, efficient and friendly.")
+    set_license("MIT")
+
+    set_urls("https://github.com/e-dant/watcher/archive/refs/tags/release/$(version).tar.gz",
+             "https://github.com/e-dant/watcher.git")
+
+    add_versions("0.9.5", "41b74d138eec106c35a99e7544def599453a8bf4cf4887ad627e1c9e3355287c")
+
+    if is_plat("linux", "bsd") then
+        add_syslinks("pthread")
+    elseif is_plat("macosx") then
+        add_frameworks("CoreFoundation", "CoreServices")
+    end
+
+    on_install("windows", "linux", "macosx", "mingw", "msys", "android", "cross", function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <wtr/watcher.hpp>
+            void test() {
+                auto cb = [](wtr::event const& ev) {};
+                auto watcher = wtr::watch(".", cb);
+            }
+        ]]}, {configs = {languages = "c++17"}}))
+    end)