rename Rockerfiles and use semver aliases rocker feature

Makefile

@@ -82,4 +82,7 @@ test: fmtcheck
 	@ go get -v github.com/constabulary/gb/...
 	gb test compose/...
 
+version:
+	@echo $(VERSION)
+
 .PHONY: clean build_image test fmtcheck

Rockerfile

@@ -2,9 +2,30 @@
 # rocker is an extensible Dockerfile builder tool
 FROM dockerhub.grammarly.io/golang-1.4.2-cross:v2
 
+REQUIRE Version
+
 ADD . /src
 WORKDIR /src
 
-TAG --no-alias rocker-compose-build:latest
+RUN \
+  TIME=$(date "+%Y-%m-%d %H:%M GMT") \
+  CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GOPATH=/src:/src/vendor \
+  go build \
+    -a -installsuffix cgo \
+    -ldflags "-X main.Version '{{ .Version }}' -X main.GitCommit '$commit' -X main.GitBranch '$branch' -X main.BuildTime '$TIME'" \
+    -v -o /bin/rocker-compose src/cmd/rocker-compose/main.go
+
+EXPORT /bin/rocker-compose
+
+#========
+
+FROM alpine:3.2
+
+RUN apk --update add bash
+
+RUN mkdir -p /opt/rocker-compose/bin
+IMPORT rocker-compose /opt/rocker-compose/bin
+
+CMD ["/opt/rocker-compose/bin/rocker-compose"]
 
-# ATTACH ["bash"]
+PUSH --semver dockerhub.grammarly.io/rocker-compose:{{ .Version }}

Rockerfile.build-cross

@@ -0,0 +1,10 @@
+# Yeah, we have a tool called 'rocker' that is not open sourced yet.
+# rocker is an extensible Dockerfile builder tool
+FROM dockerhub.grammarly.io/golang-1.4.2-cross:v2
+
+ADD . /src
+WORKDIR /src
+
+TAG --no-alias rocker-compose-build:latest
+
+# ATTACH ["bash"]