implot: add package (#2399)

packages/i/implot/xmake.lua

@@ -0,0 +1,42 @@
+package("implot")
+    set_homepage("https://github.com/epezent/implot")
+    set_description("Immediate Mode Plotting")
+    set_license("MIT")
+
+    add_urls("https://github.com/epezent/implot/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/epezent/implot.git")
+
+    add_versions("v0.15", "3df87e67a1e28db86828059363d78972a298cd403ba1f5780c1040e03dfa2672")
+
+    add_deps("imgui")
+
+    on_install("windows", "linux", "macosx", "mingw", "android", "iphoneos", function (package)
+        local configs = {}
+        io.writefile("xmake.lua", [[
+            add_requires("imgui")
+            add_rules("mode.release", "mode.debug")
+            target("implot")
+                set_kind("$(kind)")
+                set_languages("c++11")
+                add_files("*.cpp|implot_demo.cpp")
+                add_headerfiles("*.h")
+                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 <implot.h>
+            void test() {
+                ImPlot::CreateContext();
+                ImPlot::DestroyContext();
+            }
+        ]]}, {configs = {languages = "c++11"}}))
+    end)