fix: bug in makefile

Signed-off-by: Andrew Steurer <94206073+asteurer@users.noreply.github.com>

Author: asteurer

examples/wasip3/Makefile

@@ -1,14 +1,19 @@
-GO := ../../go-$(shell uname -s | tr 'A-Z' 'a-z')-$(shell uname -m | sed -e 's/aarch64/arm64/' -e 's/x86_64/amd64/')-bootstrap
+GO := go-$(shell uname -s | tr 'A-Z' 'a-z')-$(shell uname -m | sed -e 's/aarch64/arm64/' -e 's/x86_64/amd64/')-bootstrap
 
-$(GO)/bin/go:
-	curl -OL https://github.com/dicej/go/releases/download/go1.25.5-wasi-on-idle/$(GO).tbz
-	tar xf $(GO).tbz
+install-patched-go:
+	@if [ ! -d "../../$(GO)" ]; then \
+		curl -OL https://github.com/dicej/go/releases/download/go1.25.5-wasi-on-idle/$(GO).tbz --output-dir ../../; \
+		tar xf ../../$(GO).tbz -C ../../; \
+		rm ../../$(GO).tbz; \
+	else \
+		echo "Go bootstrap already exists at ../../$(GO), skipping download"; \
+	fi
 
-generate-bindings:
+generate-bindings: install-patched-go
 	componentize-go --world wasip3-example bindings --format
 
-build-component: generate-bindings $(GO)/bin/go
-	componentize-go --world wasip3-example componentize --go $(GO)/bin/go
+build-component: generate-bindings
+	componentize-go --world wasip3-example componentize --go ../../$(GO)/bin/go
 
 .PHONY: run
 run: build-component