Update makefile to make nicer release binaries

Fixes #46

.gitignore

@@ -1 +1,2 @@
 cmd/promxy/promxy
+build/*

Makefile

@@ -0,0 +1,21 @@
+BUILD := build
+GO ?= go
+GOFILES := $(shell find . -name "*.go" -type f ! -path "./vendor/*")
+GOFMT ?= gofmt -s
+
+.PHONY: clean
+clean:
+	$(GO) clean -i ./...
+	rm -rf $(EXECUTABLE) $(DIST) $(BINDATA)
+
+.PHONY: fmt
+fmt:
+	$(GOFMT) -w $(GOFILES)
+
+.PHONY: test
+test:
+	$(GO) test ./...
+
+.PHONY: release
+release:
+	./build.bash github.com/jacksontj/promxy/cmd/promxy $(BUILD)

build.bash

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+VERSION=`git describe --tags`
+
+package=$1
+destination=$2
+if [[ -z "$package" ]]; then
+  echo "usage: $0 <package-name> <destination>"
+  exit 1
+fi
+package_split=(${package//\// })
+package_name=${package_split[-1]}
+
+platforms=("linux/amd64" "linux/386" "darwin/amd64")
+
+for platform in "${platforms[@]}"
+do
+    platform_split=(${platform//\// })
+    GOOS=${platform_split[0]}
+    GOARCH=${platform_split[1]}
+    output_name=$package_name'-'$VERSION'-'$GOOS'-'$GOARCH
+    if [ $GOOS = "windows" ]; then
+        output_name+='.exe'
+    fi  
+
+    env GOOS=$GOOS GOARCH=$GOARCH CGO_ENABLED=0 go build -o $destination/$output_name $package
+    if [ $? -ne 0 ]; then
+        echo 'An error has occurred! Aborting the script execution...'
+        exit 1
+    fi
+done
+