Add version command to print version (#60)

Makefile

@@ -1,3 +1,10 @@
+ROOT_PACKAGE := github.com/stormcat24/protodep
+VERSION_PACKAGE := $(ROOT_PACKAGE)/version
+LDFLAG_GIT_COMMIT := "$(VERSION_PACKAGE).gitCommit"
+LDFLAG_GIT_COMMIT_FULL := "$(VERSION_PACKAGE).gitCommitFull"
+LDFLAG_BUILD_DATE := "$(VERSION_PACKAGE).buildDate"
+LDFLAG_VERSION := "$(VERSION_PACKAGE).version"
+
 .PHONY: tidy
 tidy:
 	GO111MODULE=on go mod tidy
@@ -10,11 +17,19 @@ APP := protodep
 GOARCH := $(shell go env GOARCH)
 GOOS := $(shell go env GOOS)
 
-build: tidy vendor
-		GO111MODULE=on GOOS=$(GOOS) GOARCH=$(GOARCH) go build -ldflags="-w -s" -o bin/protodep -mod=vendor main.go
+build: tidy vendor version
+		$(eval GIT_COMMIT := $(shell git describe --tags --always))
+		$(eval GIT_COMMIT_FULL := $(shell git rev-parse HEAD))
+		$(eval BUILD_DATE := $(shell date '+%Y%m%d'))
+		GO111MODULE=on GOOS=$(GOOS) GOARCH=$(GOARCH) go build -ldflags="-w -s -X $(LDFLAG_GIT_COMMIT)=$(GIT_COMMIT) -X $(LDFLAG_GIT_COMMIT_FULL)=$(GIT_COMMIT_FULL) -X $(LDFLAG_BUILD_DATE)=$(BUILD_DATE) -X $(LDFLAG_VERSION)=$(GIT_COMMIT)" \
+			-o bin/protodep -mod=vendor main.go
 
 define build-artifact
-		GO111MODULE=on GOOS=$(1) GOARCH=$(2) go build -ldflags="-w -s" -o artifacts/$(3) -mod=vendor main.go
+		$(eval GIT_COMMIT := $(shell git describe --tags --always))
+		$(eval GIT_COMMIT_FULL := $(shell git rev-parse HEAD))
+		$(eval BUILD_DATE := $(shell date '+%Y%m%d'))
+		GO111MODULE=on GOOS=$(1) GOARCH=$(2) go build -ldflags="-w -s -X $(LDFLAG_GIT_COMMIT)=$(GIT_COMMIT) -X $(LDFLAG_GIT_COMMIT_FULL)=$(GIT_COMMIT_FULL) -X $(LDFLAG_BUILD_DATE)=$(BUILD_DATE) -X $(LDFLAG_VERSION)=$(BUILD_DATE)-$(GIT_COMMIT)" \
+			-o artifacts/$(3) -mod=vendor main.go
 		cd artifacts && tar cvzf $(APP)_$(1)_$(2).tar.gz $(3)
 		rm ./artifacts/$(3)
 		@echo [INFO]build success: $(1)_$(2)

cmd/init.go

@@ -1,6 +1,6 @@
 package cmd
 
 func init() {
-	RootCmd.AddCommand(upCmd)
+	RootCmd.AddCommand(upCmd, versionCmd)
 	initDepCmd()
 }

cmd/version.go

@@ -0,0 +1,28 @@
+package cmd
+
+import (
+	"fmt"
+	"github.com/spf13/cobra"
+
+	"github.com/stormcat24/protodep/version"
+)
+
+const art = `
+ ________  ________  ________  _________  ________  ________  _______   ________   
+|\   __  \|\   __  \|\   __  \|\___   ___\\   __  \|\   ___ \|\  ___ \ |\   __  \  
+\ \  \|\  \ \  \|\  \ \  \|\  \|___ \  \_\ \  \|\  \ \  \_|\ \ \   __/|\ \  \|\  \ 
+ \ \   ____\ \   _  _\ \  \\\  \   \ \  \ \ \  \\\  \ \  \ \\ \ \  \_|/_\ \   ____\
+  \ \  \___|\ \  \\  \\ \  \\\  \   \ \  \ \ \  \\\  \ \  \_\\ \ \  \_|\ \ \  \___|
+   \ \__\    \ \__\\ _\\ \_______\   \ \__\ \ \_______\ \_______\ \_______\ \__\   
+    \|__|     \|__|\|__|\|_______|    \|__|  \|_______|\|_______|\|_______|\|__|`
+
+var versionCmd = &cobra.Command{
+	Use: "version",
+	Short: "Show protodep version",
+	RunE: func(cdm *cobra.Command, args []string) error {
+		fmt.Println(art)
+		fmt.Println("")
+		fmt.Println(version.Get())
+		return nil
+	},
+}

version/version.go

@@ -0,0 +1,36 @@
+package version
+
+import "fmt"
+
+var (
+	gitCommit     = "unspecified"
+	gitCommitFull = "unspecified"
+	buildDate     = "unspecified"
+	version       = "unspecified"
+)
+
+type Info struct {
+	GitCommit     string
+	GitCommitFull string
+	BuildDate     string
+	Version       string
+}
+
+func Get() Info {
+	return Info{
+		GitCommit:     gitCommit,
+		GitCommitFull: gitCommitFull,
+		BuildDate:     buildDate,
+		Version:       version,
+	}
+}
+
+func (i Info) String() string {
+	return fmt.Sprintf(
+		`{"Version": "%s", "GitCommit": "%s", "GitCommitFull": "%s", "BuildDate": "%s"}`,
+		i.Version,
+		i.GitCommit,
+		i.GitCommitFull,
+		i.BuildDate,
+	)
+}