Fix Modrinth exports of external files with omitted side field

core/mod.go

@@ -45,12 +45,12 @@ type ModOption struct {
 	Default     bool   `toml:"default,omitempty"`
 }
 
-// The three possible values of Side (the side that the mod is on) are "server", "client", and "both".
+// The four possible values of Side (the side that the mod is on) are "server", "client", "both", and "" (equivalent to "both")
-// noinspection GoUnusedConst
 const (
 	ServerSide    = "server"
 	ClientSide    = "client"
 	UniversalSide = "both"
+	EmptySide     = ""
 )
 
 // LoadMod attempts to load a mod file from a path

curseforge/export.go

@@ -72,7 +72,7 @@ var exportCmd = &cobra.Command{
 		// Filter mods by side
 		// TODO: opt-in optional disabled filtering?
 		for _, mod := range mods {
-			if len(mod.Side) == 0 || mod.Side == side || mod.Side == "both" || side == "both" {
+			if mod.Side == side || mod.Side == core.EmptySide || mod.Side == core.UniversalSide || side == core.UniversalSide {
 				mods[i] = mod
 				i++
 			}

modrinth/export.go

@@ -138,7 +138,7 @@ var exportCmd = &cobra.Command{
 					envInstalled = "required"
 				}
 				var clientEnv, serverEnv string
-				if dl.Mod.Side == core.UniversalSide {
+				if dl.Mod.Side == core.UniversalSide || dl.Mod.Side == core.EmptySide {
 					clientEnv = envInstalled
 					serverEnv = envInstalled
 				} else if dl.Mod.Side == core.ClientSide {