Multistage k6 Dockerfile, add code coverage

.circleci/config.yml

@@ -3,6 +3,9 @@ jobs:
   build:
     docker:
       - image: circleci/golang:latest
+    environment:
+      GOPATH: /home/circleci/.go_workspace
+    working_directory: /home/circleci/.go_workspace/src/github.com/loadimpact/k6
     steps:
       - checkout
       - setup_remote_docker:
@@ -13,14 +16,29 @@ jobs:
             git submodule update --init
             docker info
             echo "{\"https://index.docker.io/v1/\":{\"auth\":\"$DOCKER_AUTH\",\"email\":\"$DOCKER_EMAIL\"}}" >~/.dockercfg
+      - run:
+          name: Run linter
+          command: |
+            export PATH=$GOPATH/bin:$PATH
+            go get -t ./...
+            go get -u github.com/alecthomas/gometalinter
+            gometalinter --install
+            gometalinter --deadline 10m --config gometalinter.json --vendor ./...
+      - run:
+          name: Run tests and code coverage
+          command: |
+            export PATH=$GOPATH/bin:$PATH
+            go get github.com/axw/gocov/gocov
+            go get github.com/mattn/goveralls
+            gocov test -timeout 30s ./... > ~/coverage.json
+            goveralls -service=circle-ci -gocovdata=~/coverage.json -repotoken=$COVERALLS_REPO_TOKEN || true
       - run:
           name: Build application Docker image
           command: |
             docker build -t loadimpact/k6 .
       - run:
-          name: Run tests
+          name: Run tests on generated Docker image
           command: |
-            docker run --entrypoint /bin/sh loadimpact/k6 -c 'apk --no-cache add --virtual .deps git make build-base && cd $GOPATH/src/github.com/loadimpact/k6 && go get -t ./... && go get github.com/alecthomas/gometalinter && gometalinter --install && make check'
             docker run loadimpact/k6 --help
             docker run loadimpact/k6 help
             docker run loadimpact/k6 run --help

Dockerfile

@@ -1,9 +1,15 @@
-FROM golang:1.9-alpine
-
+FROM golang:1.9-alpine as builder
 WORKDIR $GOPATH/src/github.com/loadimpact/k6
 ADD . .
-RUN apk --no-cache add --virtual .build-deps make git build-base && \
-	go get . && go install . && rm -rf $GOPATH/pkg && \
-	apk del .build-deps
+RUN apk --no-cache add --virtual .build-deps git make build-base && \
+  go get . && CGO_ENABLED=0 go install -a -ldflags '-s -w' && \
+  go get github.com/GeertJohan/go.rice && \
+  cd $GOPATH/src/github.com/GeertJohan/go.rice/rice && \
+  go get . && go install && \
+  cd $GOPATH/src/github.com/loadimpact/k6 && \
+  rice append --exec=$GOPATH/bin/k6 -i ./js/compiler -i ./js/lib
 
-ENTRYPOINT ["k6"]
+FROM scratch
+WORKDIR /root/
+COPY --from=builder /go/bin/k6 /root
+ENTRYPOINT ["./k6"]

Makefile

@@ -12,7 +12,7 @@ format:
 
 .PHONY: check
 check:
-	gometalinter --deadline 10m --config gometalinter.json ./...
+	gometalinter --deadline 10m --config gometalinter.json --vendor ./...
 	go test -timeout 30s ./...
 
 .PHONY: docs