Provide build option 'server_only'

xmake.lua

@@ -5,7 +5,10 @@ set_license("LGPL-3.0")
 add_rules("mode.release", "mode.debug")
 set_languages("c++17")
 
-add_rules("mode.release", "mode.debug")
+
+option("server_only")
+    set_showmenu(true)
+option_end()
 
 add_defines("ASIO_STANDALONE", "ASIO_HAS_STD_TYPE_TRAITS", "ASIO_HAS_STD_SHARED_PTR", 
     "ASIO_HAS_STD_ADDRESSOF", "ASIO_HAS_STD_ATOMIC", "ASIO_HAS_STD_CHRONO", 
@@ -24,7 +27,12 @@ elseif is_os("macosx") then
 end
 
 add_requires("asio 1.24.0", "nlohmann_json", "spdlog 1.11.0")
+add_packages("spdlog")
+includes("thirdparty")
 
+if has_config("server_only") then
+    includes("application/signal_server")
+else
     if is_os("windows") then
         add_requires("vcpkg::ffmpeg 5.1.2", {configs = {shared = false}})
         add_requires("vcpkg::libnice 0.1.21")
@@ -42,9 +50,6 @@ elseif is_os("macosx") then
         add_requires("openh264 2.1.1", {configs = {shared = false}})
     end
 
-add_packages("spdlog")
-
-includes("thirdparty")
     includes("application/remote_desk")
     includes("application/signal_server")
 
@@ -237,3 +242,4 @@ target("nicetest")
             "pcre2-8", "pcre2-16", "pcre2-32", "pcre2-posix", 
             "zlib", "ffi", "libcrypto", "libssl", "intl", "iconv", "charset", "bz2",
             "Shell32", "Advapi32", "Dnsapi", "Shlwapi", "Iphlpapi")
+end