Add support for building and bundling windows binaries.

Makefile

@@ -7,10 +7,13 @@ build-cross: cmd/gaurun/gaurun.go cmd/gaurun_recover/gaurun_recover.go gaurun/*.
 	GO111MODULE=on GOOS=linux GOARCH=amd64 go build -o bin/linux/amd64/gaurun-${VERSION}/gaurun_recover  cmd/gaurun_recover/gaurun_recover.go
 	GO111MODULE=on GOOS=darwin GOARCH=amd64 go build -o bin/darwin/amd64/gaurun-${VERSION}/gaurun cmd/gaurun/gaurun.go
 	GO111MODULE=on GOOS=darwin GOARCH=amd64 go build -o bin/darwin/amd64/gaurun-${VERSION}/gaurun_recover cmd/gaurun_recover/gaurun_recover.go
+	GO111MODULE=on GOOS=windows GOARCH=amd64 go build -o bin/windows/amd64/gaurun-${VERSION}/gaurun.exe cmd/gaurun/gaurun.go
+	GO111MODULE=on GOOS=windows GOARCH=amd64 go build -o bin/windows/amd64/gaurun-${VERSION}/gaurun_recover.exe cmd/gaurun_recover/gaurun_recover.go
 
 dist: build-cross
 	cd bin/linux/amd64 && tar zcvf gaurun-linux-amd64-${VERSION}.tar.gz gaurun-${VERSION}
 	cd bin/darwin/amd64 && tar zcvf gaurun-darwin-amd64-${VERSION}.tar.gz gaurun-${VERSION}
+	cd bin/windows/amd64 && tar zcvf gaurun-windows-amd64-${VERSION}.tar.gz gaurun-${VERSION}
 
 bin/gaurun: cmd/gaurun/gaurun.go gaurun/*.go buford/**/*.go gcm/*.go
 	GO111MODULE=on go build -o bin/gaurun cmd/gaurun/gaurun.go

buford/token/token.go

@@ -41,6 +41,7 @@ type Token struct {
 }
 
 // AuthKeyFromFile loads a .p8 certificate from a local file and returns a
+// private key.
 func AuthKeyFromFile(filename string) (*ecdsa.PrivateKey, error) {
 	bytes, err := ioutil.ReadFile(filename)
 	if err != nil {
@@ -50,6 +51,7 @@ func AuthKeyFromFile(filename string) (*ecdsa.PrivateKey, error) {
 }
 
 // AuthKeyFromBytes loads a .p8 certificate from an in memory byte array and
+// returns a private key.
 func AuthKeyFromBytes(bytes []byte) (*ecdsa.PrivateKey, error) {
 	block, _ := pem.Decode(bytes)
 	if block == nil {

buford/token/token_test.go

@@ -4,8 +4,8 @@ import (
 	"crypto/ecdsa"
 	"crypto/elliptic"
 	"crypto/rand"
-	"errors"
 	"io/ioutil"
+	"runtime"
 	"testing"
 	"time"
 
@@ -27,9 +27,15 @@ func TestValidTokenFromP8Bytes(t *testing.T) {
 }
 
 func TestNoSuchFileP8File(t *testing.T) {
-	token, err := token.AuthKeyFromFile("")
-	assert.Equal(t, errors.New("open : no such file or directory").Error(), err.Error())
-	assert.Nil(t, token)
+	// assume *nix 'system file not found' error is returned by default.
+	expected := "open : no such file or directory"
+	if runtime.GOOS == "windows" {
+		expected = "open : The system cannot find the file specified."
+	}
+
+	privateKey, err := token.AuthKeyFromFile("")
+	assert.Equal(t, expected, err.Error())
+	assert.Nil(t, privateKey)
 }
 
 func TestInvalidP8File(t *testing.T) {

gaurun/server_test.go

@@ -3,6 +3,7 @@ package gaurun
 import (
 	"net/http"
 	"net/url"
+	"runtime"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -31,8 +32,16 @@ func TestRegisterHandlers(t *testing.T) {
 func TestGetListener(t *testing.T) {
 	validConfigs := []ConfToml{
 		{Core: SectionCore{Port: "8080"}},
-		{Core: SectionCore{Port: "unix:/tmp/gaurun.sock"}},
 	}
+
+	if runtime.GOOS != "windows" {
+		// Only provide a config with a unix socket if *nix based.
+		validConfigs = append(
+			validConfigs,
+			ConfToml{Core: SectionCore{Port: "unix:/tmp/gaurun.sock"}},
+		)
+	}
+
 	invalidConfigs := []ConfToml{
 		// port is empty
 		{},