#4 - version details

.goreleaser.yml

@@ -4,6 +4,8 @@ before:
 builds:
 - env:
   - CGO_ENABLED=0
+- ldflags:
+  - -X "main.buildVersion={{.Env.TRAVIS_TAG}}{{.Env.TRAVIS_BUILD_NUMBER}}" -X "main.buildCommit={{.Env.TRAVIS_COMMIT}}"
 archive:
   replacements:
     darwin: Darwin

Makefile

@@ -0,0 +1,26 @@
+OUTPUT?=gitstrap
+BUILD_VERSION?=0.0
+BUILD_HASH?=stub
+BUILD_DATE?=2019.01.01
+
+all: clean build test lint
+
+build: $(OUTPUT)
+
+
+$(OUTPUT):
+	go build \
+		-ldflags "-X main.buildVersion=$(BUILD_VERSION) -X main.buildCommit=$(BUILD_HASH) -X main.buildDate=$(BUILD_DATE)" \
+		-o $(OUTPUT)
+
+clean:
+	rm -f $(OUTPUT)
+
+test: $(OUTPUT)
+	go test .
+
+lint: $(OUTPUT)
+	gometalinter .
+
+.PHONY: build clean test lint
+

main.go

@@ -16,17 +16,28 @@ import (
 )
 
 var (
-	token string
-	conf  *cfg.YamlConfig
-	ctx   context.Context
-	cli   *github.Client
+	token        string
+	conf         *cfg.YamlConfig
+	ctx          context.Context
+	cli          *github.Client
+	buildVersion string
+	buildCommit  string
+	buildDate    string
 )
 
 func main() {
 	var config string
+	var flagVersion bool
 	flag.StringVar(&token, "token", "", "Github API token")
 	flag.StringVar(&config, "config", ".gitstrap.yaml", "Gitstrap config (default .gitstrap)")
+	flag.BoolVar(&flagVersion, "version", false, "Show version")
 	flag.Parse()
+	if flagVersion {
+		fmt.Printf("gitstrap version: %s\n"+
+			"commit hash: %s\n"+
+			"build date: %s\n", buildVersion, buildCommit, buildDate)
+		os.Exit(0)
+	}
 	if token == "" {
 		flagErr("Github token required")
 	}