Add makefile

Author: dennis-tra

.gitignore

@@ -7,6 +7,8 @@
 *.dylib
 pcp$
 
+out/**
+
 # Test binary, built with `go test -c`
 *.test
 

Makefile

@@ -0,0 +1,35 @@
+# ########################################################## #
+# Makefile for Golang Project
+# Includes cross-compiling, installation, cleanup
+# ########################################################## #
+
+ROOT_DIR:=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
+
+BINARY=pcp
+VERSION=0.1.0
+BUILD=`git rev-parse HEAD`
+PLATFORMS=darwin linux windows
+ARCHITECTURES=386 amd64 arm
+
+# Setup linker flags option for build that interoperate with variable names in src code
+LDFLAGS=-ldflags "-X main.Version=${VERSION} -X main.Build=${BUILD}"
+
+default: build
+
+all: clean release install
+
+build:
+	go build ${LDFLAGS} -o ${BINARY} cmd/pcp/pcp.go
+
+release:
+	$(foreach GOOS, $(PLATFORMS),\
+	$(foreach GOARCH, $(ARCHITECTURES), $(shell export GOOS=$(GOOS); export GOARCH=$(GOARCH); go build -o out/$(BINARY)-$(GOOS)-$(GOARCH) cmd/pcp/pcp.go)))
+
+install:
+	go install ${LDFLAGS}
+
+# Remove only what we've created
+clean:
+	rm -r out
+
+.PHONY: check clean install release all

cmd/pcp/pcp.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"os"
 
 	"github.com/urfave/cli/v2"
@@ -11,17 +12,18 @@ import (
 	"github.com/dennis-tra/pcp/pkg/send"
 )
 
-const (
+var (
 	// Version of the PCP command line tool.
-	Version = "0.0.1"
+	Version = "compile-time"
+	Build   = "compile-time"
 )
 
 func main() {
 
 	app := &cli.App{
 		Name:                 "pcp",
 		Usage:                "Peer Copy, a peer-to-peer data transfer tool.",
-		Version:              Version,
+		Version:              fmt.Sprintf("%s+%s", Version, Build[:7]),
 		EnableBashCompletion: true,
 		Commands: []*cli.Command{
 			receive.Command,