barkeep: add package (#5633)

* barkeep: add package

* enable fmt for old compiler

packages/b/barkeep/xmake.lua

@@ -0,0 +1,41 @@
+package("barkeep")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://oir.github.io/barkeep/")
+    set_description("Small C++ header to display async animations, counters, and progress bars")
+    set_license("Apache-2.0")
+
+    add_urls("https://github.com/oir/barkeep/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/oir/barkeep.git")
+
+    add_versions("v0.1.3", "211425e348b570547b49d11edfb6e3750701d97cc89f073771b16d6012530a66")
+
+    add_configs("fmt", {description = "Use fmt format", default = true, type = "boolean"})
+
+    if is_plat("linux", "bsd") then
+        add_syslinks("pthread")
+    end
+
+    on_load(function (package)
+        if package:config("fmt") then
+            package:add("deps", "fmt")
+            package:add("defines", "BARKEEP_ENABLE_FMT_FORMAT")
+        else
+            package:add("defines", "BARKEEP_ENABLE_STD_FORMAT")
+        end
+    end)
+
+    on_install(function (package)
+        if package:has_tool("cxx", "cl") then
+            package:add("cxxflags", "/utf-8")
+        end
+
+        os.cp("barkeep", package:installdir("include"))
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void test() {
+                auto anim = barkeep::Animation({.message = "Working"});
+            }
+        ]]}, {configs = {languages = "c++20"}, includes = {"barkeep/barkeep.h"}}))
+    end)