Add Makefile

This makefile is ported over from directxman12/k8s-prometheus-adapter,
and adds make targets to populate vendor, build the sample adapter,
run tests, and run/verify gofmt.

Author: DirectXMan12

.gitignore

@@ -1,4 +1,4 @@
 *.swp
 *~
-sample-main
 vendor
+_output

Makefile

@@ -0,0 +1,22 @@
+ARCH?=amd64
+OUT_DIR?=./_output
+
+.PHONY: all test verify-gofmt gofmt verify
+
+all: build
+build: vendor
+	CGO_ENABLED=0 GOARCH=$(ARCH) go build -a -tags netgo -o $(OUT_DIR)/$(ARCH)/sample-adapter github.com/directxman12/custom-metrics-boilerplate
+
+vendor: glide.lock
+	glide install -v
+
+test: vendor
+	CGO_ENABLED=0 go test ./pkg/...
+
+verify-gofmt:
+	./hack/gofmt-all.sh -v
+
+gofmt:
+	./hack/gofmt-all.sh
+
+verify: verify-gofmt test

hack/gofmt-all.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# Copyright 2017 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+verify=0
+if [[ ${1:-} = "--verify" || ${1:-} = "-v" ]]; then
+  verify=1
+fi
+
+find_files() {
+  find . -not \( \( \
+    -wholename './_output' \
+    -o -wholename './vendor' \
+  \) -prune \) -name '*.go'
+}
+
+if [[ $verify -eq 1 ]]; then
+  diff=$(find_files | xargs gofmt -s -d 2>&1)
+  if [[ -n "${diff}" ]]; then
+    echo "gofmt -s -w $(echo "${diff}" | awk '/^diff / { print $2 }' | tr '\n' ' ')"
+    exit 1
+  fi
+else
+  find_files | xargs gofmt -s -w
+fi