feat: add goreleaser config

create a release using goreleaser
add dist folder to ignore list

add self documented Makefile

.gitignore

@@ -24,3 +24,4 @@ _testmain.go
 *.exe
 *.test
 *.prof
+dist

.goreleaser.yml

@@ -0,0 +1,22 @@
+build: 
+  ldflags: -s -w -X main.Version={{.Version}}
+  binary: trawl
+  env: 
+    - CGO_ENABLED=0 
+  goos: 
+    - linux
+    - darwin
+  goarch: 
+    - amd64
+archive:
+  format: tar.gz
+snapshot: 
+  name_template: "{{.Commit}}"
+fpm:
+  vendor: Rob Phoenix
+  homepage: https://github.com/robphoenix/trawl
+  maintainer: Rob Phoenix
+  description: A strong fishing net for dragging along the sea bottom to collect IP addresses and similar flotsam & jetsam
+  formats:
+    - deb
+  bindir: /usr/local/bin

Makefile

@@ -0,0 +1,14 @@
+snapshot: # create a snapshot
+	goreleaser --snapshot --rm-dist --skip-validate --skip-publish
+
+release: # create a release build
+	goreleaser --rm-dist
+
+install: # just compile and install
+	go install
+
+# Absolutely awesome: http://marmelab.com/blog/2016/02/29/auto-documented-makefile.html
+help:
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+
+.DEFAULT_GOAL := help

main.go

@@ -14,7 +14,7 @@ import (
 	"github.com/rdegges/go-ipify"
 )
 
-const (
+var (
 	// Version of current release
 	Version = "v0.4.0"
 )