Integrated a makefile

.drone.yml

@@ -1,14 +1,9 @@
 build:
   image: golang:1.5
-  environment:
-    - GO15VENDOREXPERIMENT=1
-    - GOOS=linux
-    - GOARCH=amd64
-    - CGO_ENABLED=0
   commands:
-    - go get
-    - go build
-    - go test
+    - make deps
+    - make build
+    - make test
 
 publish:
   docker:
@@ -21,9 +16,8 @@ publish:
 
 plugin:
   name: Email
-  desc: Send build status notifications via email.
+  desc: Send build status notifications via Email
   type: notify
   image: plugins/drone-email
   labels:
     - email
-

Dockerfile

@@ -1,9 +1,15 @@
-# Docker image for Drone's email notification plugin
+# Docker image for the Drone Email plugin
 #
-#     CGO_ENABLED=0 go build -a -tags netgo
+#     cd $GOPATH/src/github.com/drone-plugins/drone-email
+#     make deps build
 #     docker build --rm=true -t plugins/drone-email .
 
-FROM gliderlabs/alpine:3.1
-RUN apk-install ca-certificates
+FROM alpine:3.2
+
+RUN apk update && \
+  apk add \
+    ca-certificates && \
+  rm -rf /var/cache/apk/*
+
 ADD drone-email /bin/
-ENTRYPOINT ["/bin/drone-email"]
+ENTRYPOINT ["/bin/drone-email"]

Makefile

@@ -0,0 +1,22 @@
+.PHONY: clean deps test build
+
+export GOOS ?= linux
+export GOARCH ?= amd64
+export CGO_ENABLED ?= 0
+
+CI_BUILD_NUMBER ?= 0
+
+LDFLAGS += -X "main.buildDate=$(shell date -u '+%Y-%m-%d %H:%M:%S %Z')"
+LDFLAGS += -X "main.build=$(CI_BUILD_NUMBER)"
+
+clean:
+	go clean -i ./...
+
+deps:
+	go get -t ./...
+
+test:
+	go test -cover ./...
+
+build:
+	go build -ldflags '-s -w $(LDFLAGS)'