imnodes: add package (#2398)

* imnodes: add package

* fix languages

packages/i/imnodes/xmake.lua

@@ -0,0 +1,43 @@
+package("imnodes")
+    set_homepage("https://github.com/Nelarius/imnodes")
+    set_description("A small, dependency-free node editor for dear imgui")
+    set_license("MIT")
+
+    add_urls("https://github.com/Nelarius/imnodes/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/Nelarius/imnodes.git")
+
+    add_versions("v0.5", "c19a1d8e3fabf71def02b98c43a3f4551f0a5bd3740a93474a356e8957ec2ab2")
+
+    add_deps("imgui")
+
+    on_install("windows", "linux", "macosx", "mingw", "android", "iphoneos", function (package)
+        local configs = {}
+        io.writefile("xmake.lua", [[
+            add_requires("imgui")
+            add_rules("mode.release", "mode.debug")
+            target("imnodes")
+                set_kind("$(kind)")
+                set_languages("c++11")
+                add_files("imnodes.cpp")
+                add_headerfiles("imnodes.h", "imnodes_internal.h")
+                add_defines("IMGUI_DEFINE_MATH_OPERATORS")
+                add_packages("imgui")
+                if is_plat("windows") and is_kind("shared") then
+                    add_rules("utils.symbols.export_all", {export_classes = true})
+                end
+        ]])
+        if package:config("shared") then
+            configs.kind = "shared"
+        end
+        import("package.tools.xmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <imnodes.h>
+            void test() {
+                ImNodes::CreateContext();
+                ImNodes::DestroyContext();
+            }
+        ]]}, {configs = {languages = "c++11"}}))
+    end)