Made the makefiles more flexible

src/Makefile

@@ -1,25 +1,26 @@
 GOBIN ?= go
-LDFLAGS = -s -w
-LDFLAGS_WIN = -H windowsgui -s -w
-GOFLAGS = -trimpath
+GOMODTIDY ?= $(GOBIN) mod tidy
+LDFLAGS ?= -s -w
+LDFLAGS_WIN ?= -H windowsgui -s -w
+GOFLAGS ?= -trimpath
 SOURCES = server.go twitch.go youtube.go owncast.go kick.go
 SOURCES_GUI = $(SOURCES) gui.go
 BIN = streamgoose
 
 unix:
-	$(GOBIN) mod tidy
+	$(GOMODTIDY)
 	$(GOBIN) build $(GOFLAGS) -ldflags "$(LDFLAGS)" -o $(BIN) $(SOURCES_GUI)
 
 unix-headless:
-	$(GOBIN) mod tidy
+	$(GOMODTIDY)
 	$(GOBIN) build $(GOFLAGS) -ldflags "$(LDFLAGS)" -o $(BIN) $(SOURCES)
 
 win64:
-	$(GOBIN) mod tidy
+	$(GOMODTIDY)
 	GOOS=windows GOARCH=amd64 $(GOBIN) build $(GOFLAGS) -ldflags "$(LDFLAGS_WIN)" -o $(BIN).exe $(SOURCES_GUI)
 
 win64-headless:
-	$(GOBIN) mod tidy
+	$(GOMODTIDY)
 	GOOS=windows GOARCH=amd64 $(GOBIN) build $(GOFLAGS) -ldflags "$(LDFLAGS)" -o $(BIN).exe $(SOURCES)
 
 clean:

src/gui.go

@@ -1,3 +1,4 @@
+// build +gui
 /*
   StreamGoose UI — Go reference implementation