update drogon package (#426)

* add mysql as an optional dep, disable it if not used

* separate deps into config options

* don't add any logic for c-ares or openssl, invalid cmake options are just ignored anyway and don't impede installation

packages/d/drogon/xmake.lua

@@ -14,10 +14,15 @@ package("drogon")
     add_patches("1.6.0", path.join(os.scriptdir(), "patches", "1.6.0", "trantor.patch"), "87e317bf5e45b3f3dfe781db8a0af9603ebdab057a6aedbc36d8aec9e0da58a7")
     add_patches("1.6.0", path.join(os.scriptdir(), "patches", "1.6.0", "resolv.patch"), "dc144ff1cdcfee413efbcdc568fed587318289e8fa1bb0da9d2ea94a15588b25")
 
+    add_configs("c_ares", {description = "Enable async DNS query support.", default = false, type = "boolean"})
+    add_configs("mysql", {description = "Enable mysql support.", default = false, type = "boolean"})
+    add_configs("openssl", {description = "Enable openssl support.", default = true, type = "boolean"})
+    add_configs("postgresql", {description = "Enable postgresql support.", default = false, type = "boolean"})
+    add_configs("sqlite3", {description = "Enable sqlite3 support.", default = false, type = "boolean"})
+
     add_deps("cmake")
     add_deps("trantor", "jsoncpp", "brotli", "zlib")
-    add_deps("c-ares", "sqlite3", "openssl", "mysql", {optional = true})
-    add_deps("postgresql", {optional = true, system = true})
+
     if is_plat("windows") then
         add_syslinks("ws2_32", "rpcrt4", "crypt32", "advapi32")
     else
@@ -27,24 +32,49 @@ package("drogon")
         end
     end
 
+    on_load(function(package)
+        local configdeps = {c_ares     = "c-ares",
+                            mysql      = "mysql",
+                            openssl    = "openssl",
+                            postgresql = "postgresql",
+                            sqlite3    = "sqlite3"}
+
+        for name, dep in pairs(configdeps) do
+            if package:config(name) then
+                package:add("deps", dep)
+            end
+        end
+    end)
+
     on_install("windows|x64", "macosx", "linux", function (package)
         io.replace("cmake/templates/config.h.in", "\"@COMPILATION_FLAGS@@DROGON_CXX_STANDARD@\"", "R\"(@COMPILATION_FLAGS@@DROGON_CXX_STANDARD@)\"", {plain = true})
 
         local configs = {"-DBUILD_EXAMPLES=OFF"}
         table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:debug() and "Debug" or "Release"))
+
         -- no support for windows shared library
         if not package:is_plat("windows") then
             table.insert(configs, "-DBUILD_DROGON_SHARED=" .. (package:config("shared") and "ON" or "OFF"))
         end
-        if not package:dep("postgresql"):fetch() then
-            table.insert(configs, "-DBUILD_POSTGRESQL=OFF")
-        end
-        if not package:dep("sqlite3"):fetch() then
-            table.insert(configs, "-DBUILD_SQLITE=OFF")
-        end
-        if not package:dep("mysql"):fetch() then
-            table.insert(configs, "-DBUILD_MYSQL=OFF")
+
+        for name, enabled in pairs(package:configs()) do
+            if not package:extraconf("configs", name, "builtin") then
+                if enabled then
+                    if name == "sqlite3" then
+                        table.insert(configs, "-DBUILD_SQLITE=ON")
+                    else
+                        table.insert(configs, "-DBUILD_" .. name:upper() .. "=ON")
+                    end
+                else
+                    if name == "sqlite3" then
+                        table.insert(configs, "-DBUILD_SQLITE=OFF")
+                    else
+                        table.insert(configs, "-DBUILD_" .. name:upper() .. "=OFF")
+                    end
+                end
+            end
         end
+
         if package:config("pic") ~= false then
             table.insert(configs, "-DCMAKE_POSITION_INDEPENDENT_CODE=ON")
         end