Reproducible builds: WASM

Author: kaloudis

.gitignore

@@ -19,5 +19,8 @@ wasm-client.wasm
 # Mobile build output
 build/
 
+# Reproducible build output
+reproducible-builds/
+
 # Misc
 *.DS_Store

Dockerfile-wasm

@@ -0,0 +1,14 @@
+#Get golang 1.17.3-buster as a base image
+FROM golang:1.17.3-buster@sha256:ee3a388a872237ddb600de3ab9512e73df0043f8878f0f355baeb5b723ef16ec as builder
+
+#Define the working directory in the container
+WORKDIR /app
+
+#Copy all files from root into the container
+COPY . ./
+
+#Use go mod tidy to handle dependencies
+RUN go mod tidy
+
+#Run the make task
+RUN make wasm

Makefile

@@ -66,7 +66,7 @@ build:
 wasm:
 	# The appengine build tag is needed because of the jessevdk/go-flags library
 	# that has some OS specific terminal code that doesn't compile to WASM.
-	cd cmd/wasm-client; GOOS=js GOARCH=wasm go build -trimpath -ldflags="$(LDFLAGS)" -tags="$(RPC_TAGS)" -v -o wasm-client.wasm .
+	cd cmd/wasm-client; CGO_ENABLED=0 GOOS=js GOARCH=wasm go build -trimpath -ldflags="$(LDFLAGS)" -tags="$(RPC_TAGS)" -v -o wasm-client.wasm .
 	$(CP) cmd/wasm-client/wasm-client.wasm example/wasm-client.wasm
 
 apple:
@@ -91,6 +91,23 @@ android:
 
 mobile: ios android
 
+repro-wasm:
+	#Build the repro-wasm image
+	docker build -f Dockerfile-wasm -t repro-wasm-image --no-cache .
+
+	#Run the repro-wasm-image in a new container called repro-wasm
+	docker run --name repro-wasm  repro-wasm-image
+
+	#Copy the compiled WASM file to the host machine
+	mkdir -p reproducible-builds
+	docker cp repro-wasm:/app/cmd/wasm-client/wasm-client.wasm ./reproducible-builds/
+	
+	#Remove the repro-wasm container
+	docker rm repro-wasm
+
+	#Remove the repro-wasm-image
+	docker image rm repro-wasm-image
+
 # =======
 # TESTING
 # =======