Add argh (#1253)

* Add argh

I didn't figure out how to run the official binary test in `on_test`,
but it's a very refreshing header-only project,
so if it gets compiled successfully it will run fine.

* update descriptions

* remove cmake

* Update xmake.lua

Co-authored-by: myuan <[email protected]>
Co-authored-by: ruki <[email protected]>

packages/a/argh/xmake.lua

@@ -0,0 +1,33 @@
+package("argh")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/adishavit/argh")
+    set_description("Argh! A minimalist argument handler.")
+    set_license("BSD-3-Clause")
+
+    add_urls("https://github.com/adishavit/argh/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/adishavit/argh.git")
+    add_versions("v1.3.2", "4b76d8c55e97cc0752feee4f00b99dc58464dd030dea9ba257c0a7d24a84f9dd")
+
+    on_install(function (package)
+        os.cp("argh.h", package:installdir("include"))
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <iostream>
+            using namespace std;
+                    
+            int test(int argc, char* argv[]) {
+                argh::parser cmdl;
+                cmdl.parse(argc, argv, argh::parser::PREFER_PARAM_FOR_UNREG_OPTION);
+                if (cmdl["-v"]) cout << "Verbose, I am." << endl;
+                cout << "Positional args:\n";
+                for (auto& pos_arg : cmdl) cout << '\t' << pos_arg << endl;
+                cout << "\nFlags:\n";
+                for (auto& flag : cmdl.flags()) cout << '\t' << flag << endl;
+                cout << "\nParameters:\n";
+                for (auto& param : cmdl.params()) cout << '\t' << param.first << " : " << param.second << endl;
+                return EXIT_SUCCESS;
+            }
+        ]]}, {configs = {languages = "cxx17"}, includes = "argh.h"}))
+    end)