Use go modules for dependencies (#43)

* Use go modules for dependencies

* PR feedback: put back include in Makefile
It is necessary for travis because it uses Makefile targets in build-harness

* PR Feedback: Fix .travis.yml
Since make targets are based on go modules, travis.yml
definition needs to change appropriately to no longer
use godep and glide.

.travis.yml

@@ -2,7 +2,7 @@ sudo: required
 
 language: go
 go:
-  - 1.9.x
+  - 1.14.x
 
 addons:
   apt:
@@ -20,14 +20,10 @@ services:
 install:
 - make init
 - make travis/docker-login
-- make go/deps-build
 - make go/deps-dev
-- make go-get
 
 script:
-- make go/deps
-- make go/test
-- make go/lint
+- make lint
 - make go/build-all
 - ls -l release/
 - make docker/build

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.13.11 as builder
+FROM golang:1.14.3 as builder
 RUN mkdir -p /go/src/github.com/cloudposse/prometheus-to-cloudwatch
 WORKDIR /go/src/github.com/cloudposse/prometheus-to-cloudwatch
 COPY . .

Makefile

@@ -1,15 +1,19 @@
 SHELL = /bin/bash
 
-PATH:=$(PATH):$(GOPATH)/bin
-
 include $(shell curl --silent -o .build-harness "https://raw.githubusercontent.com/cloudposse/build-harness/master/templates/Makefile.build-harness"; echo .build-harness)
 
+.PHONY : go-build
+go-build: 
+	CGO_ENABLED=0 go build -v -o "./dist/bin/prometheus-to-cloudwatch" *.go
+
+## Lint code
+lint: $(GO) vet
+	$(call assert-set,GO)
+	find . ! -path "*/vendor/*" ! -path "*/.glide/*" -type f -name '*.go' | xargs -n 1 golint
 
-.PHONY : go-get
-go-get:
-	go get
+## Vet code
+vet: $(GO)
+	$(call assert-set,GO)
+	find . ! -path "*/vendor/*" ! -path "*/.glide/*" -type f -name '*.go' | xargs $(GO) vet -v
 
 
-.PHONY : go-build
-go-build: go-get
-	CGO_ENABLED=0 go build -v -o "./dist/bin/prometheus-to-cloudwatch" *.go

go.mod

@@ -0,0 +1,9 @@
+module github.com/cloudposse/prometheus-to-cloudwatch
+
+go 1.14
+
+require (
+	github.com/aws/aws-sdk-go v1.35.21 // indirect
+	github.com/gobwas/glob v0.2.3 // indirect
+	github.com/prometheus/common v0.14.0 // indirect
+)