update ci to push latest

.goreleaser.yml

@@ -26,4 +26,3 @@ dockers:
   dockerfile: Dockerfile
   image_templates:
   - "nuvo/{{.ProjectName}}:{{ .Tag }}"
-  - "nuvo/{{.ProjectName}}:latest"

.travis.yml

@@ -9,7 +9,7 @@ services:
 deploy:
 - provider: script
   skip_cleanup: true
-  script: docker login -u $DOCKER_USER -p $DOCKER_PASSWORD && curl -sL https://git.io/goreleaser | bash
+  script: curl -sL https://git.io/goreleaser | bash
   on:
     tags: true
     condition: $TRAVIS_OS_NAME = linux

Makefile

@@ -4,8 +4,11 @@ GIT_TAG := $(shell git describe --tags --always)
 GIT_COMMIT := $(shell git rev-parse --short HEAD)
 LDFLAGS := "-X main.GitTag=${GIT_TAG} -X main.GitCommit=${GIT_COMMIT}"
 DIST := $(CURDIR)/dist
+DOCKER_USER := $(shell printenv DOCKER_USER)
+DOCKER_PASSWORD := $(shell printenv DOCKER_PASSWORD)
+TRAVIS := $(shell printenv TRAVIS)
 
-all: bootstrap build
+all: bootstrap build docker push
 
 fmt:
 	go fmt ./pkg/... ./cmd/...
@@ -17,6 +20,24 @@ vet:
 build: fmt vet
 	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags $(LDFLAGS) -o bin/cain cmd/cain.go
 
+# Build cain docker image
+docker: fmt vet
+	cp bin/cain cain
+	docker build -t nuvo/cain:latest .
+	rm cain
+
+
+# Push will only happen in travis ci
+push:
+ifdef TRAVIS
+ifdef DOCKER_USER
+ifdef DOCKER_PASSWORD
+	docker login -u $(DOCKER_USER) -p $(DOCKER_PASSWORD)
+	docker push nuvo/cain:latest
+endif
+endif
+endif
+
 bootstrap:
 ifndef HAS_DEP
 	wget -q -O $(GOPATH)/bin/dep https://github.com/golang/dep/releases/download/$(DEP_VERSION)/dep-linux-amd64