compile the jarfile in docker

Dockerfile

@@ -1,12 +1,25 @@
-FROM alpine:3.20
-LABEL maintainer sndsgd
+FROM debian:trixie-slim AS build
+ARG VERSION
 
-ARG JARFILE_URL
+RUN apt-get update && apt-get install -y \
+  build-essential curl gcc git gnupg nodejs openjdk-21-jdk-headless python3 zip
 
-RUN apk add --update --no-cache curl openjdk11-jre \
-    && curl ${JARFILE_URL} -o /opt/closure-compiler.jar \
-    && chmod 0755 /opt/closure-compiler.jar \
-    && echo -e "#!/bin/sh -e\nexec java -jar /opt/closure-compiler.jar \$@" > /usr/local/bin/closure-compiler \
-    && chmod +x /usr/local/bin/closure-compiler
+WORKDIR /opt
+RUN curl -fsSL https://github.com/bazelbuild/bazelisk/releases/download/v1.25.0/bazelisk-amd64.deb -o /tmp/bazelisk-amd64.deb \
+  && dpkg -i /tmp/bazelisk-amd64.deb
 
-ENTRYPOINT ["/usr/local/bin/closure-compiler"]
+RUN git clone --depth=1 --branch ${VERSION} https://github.com/google/closure-compiler.git
+
+WORKDIR /opt/closure-compiler
+
+# use the tag from git (as opposed to ${VERSION}) to ensure we have the correct version
+RUN GIT_TAG=$(git describe --tags --abbrev=0) && \
+  bazelisk build --define=COMPILER_VERSION=$GIT_TAG --verbose_failures //:compiler_uberjar_deploy.jar
+
+# runtime image
+FROM debian:trixie-slim
+LABEL maintainer=sndsgd
+
+RUN apt-get update && apt-get install --yes --no-install-recommends openjdk-21-jre-headless
+COPY --from=build /opt/closure-compiler/bazel-bin/compiler_uberjar_deploy.jar /opt/closure-compiler.jar
+ENTRYPOINT ["java", "-jar", "/opt/closure-compiler.jar"]

Makefile

@@ -16,16 +16,14 @@ help:
 	| awk 'BEGIN {FS = ":.*?## "}; {printf "\033[33m%s\033[0m~%s\n", $$1, $$2}' \
 	| column -s "~" -t
 
-VERSION_URL ?= https://repo1.maven.org/maven2/com/google/javascript/closure-compiler/
-VERSION_PATTERN ?= '(?<=>)[^/]+(?=/)'
+VERSION_URL ?= https://github.com/google/closure-compiler/tags
+VERSION_PATTERN ?= '/google/closure-compiler/releases/tag/v[0-9]+'
 .PHONY: ensure-version
 ensure-version:
 ifeq ($(VERSION),)
-	$(info fetching latest version...)
-	@$(eval VERSION = $(shell curl -s $(VERSION_URL) | grep '<a href="v' | sort | tail -n 1 | grep -Po $(VERSION_PATTERN)))
-	@$(eval FETCHED_VERSION = $(VERSION))
+	$(eval VERSION = $(shell curl -s $(VERSION_URL) | grep -Po $(VERSION_PATTERN) | head -n 1 | sed 's|.*/tag/||'))
+	$(eval FETCHED_VERSION = $(VERSION))
 endif
-	@$(eval JARFILE_URL := $(VERSION_URL)$(VERSION)/closure-compiler-$(VERSION).jar)
 	@$(eval IMAGE := $(IMAGE_NAME):$(VERSION))
 
 IMAGE_ARGS ?= --quiet
@@ -35,9 +33,15 @@ image: ensure-version
 	$(info building image for closure compiler $(VERSION)...)
 	@docker build \
 	  $(IMAGE_ARGS) \
-		--build-arg JARFILE_URL=$(JARFILE_URL) \
+		--build-arg VERSION=$(VERSION) \
 		--tag $(IMAGE) \
 		$(CWD)
+	@VERSION_OUTPUT=$$(docker run --rm $(IMAGE) --version | grep "Version: " | awk '{print $$2}' | tr -d '[:space:]'); \
+	if [ "$$VERSION_OUTPUT" != "$(VERSION)" ]; then \
+		echo "unexpected version: '$$VERSION_OUTPUT' (expected: $(VERSION))"; \
+		docker image rm $(IMAGE); \
+		exit 1; \
+	fi
 ifeq ($(VERSION),$(FETCHED_VERSION))
 	@docker tag $(IMAGE) $(LATEST_IMAGE)
 endif

README.md

@@ -15,6 +15,10 @@ docker run --rm \
   -v "$(pwd)":"$(pwd)" \
   -w "$(pwd)" \
   ghcr.io/sndsgd/closure-compiler:latest \
+  --compilation_level=ADVANCED \
+  --language_out=ECMASCRIPT6_STRICT \
+  --summary_detail_level=10 \
+  --warning_level=VERBOSE \
   --js="$(pwd)/path/to/src/**.js" \
   --js="$(pwd)/path/to/entrypoint.js"
 ```

tests/app.js

@@ -5,7 +5,4 @@ console.log(lib.foobar(lib.foobar("--")));
 console.log(lib.kilogramsToPounds(100));
 
 document.body.appendChild(lib.createDiv("help"))
-document.body.appendChild(lib.createDiv("help1"))
-document.body.appendChild(lib.createDiv("help2"))
-document.body.appendChild(lib.createDiv("help3"))
-document.body.appendChild(lib.createDiv("help4", "foo"))
+document.body.appendChild(lib.createDiv("help", "pls"))