feat: add version command (#565)

Makefile

@@ -1,14 +1,15 @@
 #!/usr/bin/make -f
 
 VERSION := $(shell echo $(shell git describe --tags 2>/dev/null || git log -1 --format='%h') | sed 's/^v//')
-COMMIT := $(shell git log -1 --format='%H')
 DOCKER := $(shell which docker)
+versioningPath := "github.com/celestiaorg/orchestrator-relayer/cmd/blobstream/version"
+LDFLAGS=-ldflags="-X '$(versioningPath).buildTime=$(shell date)' -X '$(versioningPath).lastCommit=$(shell git rev-parse HEAD)' -X '$(versioningPath).semanticVersion=$(shell git describe --tags --dirty=-dev 2>/dev/null || git rev-parse --abbrev-ref HEAD)'"
 
 all: install
 
 install: go.sum
 	@echo "--> Installing blobstream"
-	@go install -mod=readonly ./cmd/blobstream
+	@go install -mod=readonly ${LDFLAGS} ./cmd/blobstream
 
 go.sum: mod
 	@echo "--> Verifying dependencies have expected content"
@@ -24,7 +25,7 @@ pre-build:
 
 build: mod
 	@mkdir -p build/
-	@go build -o build ./cmd/blobstream
+	@go build -o build ${LDFLAGS} ./cmd/blobstream
 
 build-docker:
 	@echo "--> Building Docker image"

cmd/blobstream/root/cmd.go

@@ -4,6 +4,7 @@ import (
 	"github.com/celestiaorg/orchestrator-relayer/cmd/blobstream/bootstrapper"
 	"github.com/celestiaorg/orchestrator-relayer/cmd/blobstream/generate"
 	"github.com/celestiaorg/orchestrator-relayer/cmd/blobstream/query"
+	"github.com/celestiaorg/orchestrator-relayer/cmd/blobstream/version"
 
 	"github.com/celestiaorg/celestia-app/x/qgb/client"
 	"github.com/celestiaorg/orchestrator-relayer/cmd/blobstream/deploy"
@@ -30,6 +31,7 @@ func Cmd() *cobra.Command {
 		generate.Command(),
 		query.Command(),
 		bootstrapper.Command(),
+		version.Cmd,
 	)
 
 	rootCmd.SetHelpCommand(&cobra.Command{})

cmd/blobstream/version/build_info.go

@@ -0,0 +1,35 @@
+package version
+
+import (
+	"fmt"
+	"runtime"
+)
+
+var (
+	buildTime       string
+	lastCommit      string
+	semanticVersion string
+
+	systemVersion = fmt.Sprintf("%s/%s", runtime.GOARCH, runtime.GOOS)
+	golangVersion = runtime.Version()
+)
+
+// BuildInfo represents all necessary information about the current build.
+type BuildInfo struct {
+	BuildTime       string
+	LastCommit      string
+	SemanticVersion string
+	SystemVersion   string
+	GolangVersion   string
+}
+
+// GetBuildInfo returns information about the current build.
+func GetBuildInfo() *BuildInfo {
+	return &BuildInfo{
+		buildTime,
+		lastCommit,
+		semanticVersion,
+		systemVersion,
+		golangVersion,
+	}
+}

cmd/blobstream/version/version.go

@@ -0,0 +1,23 @@
+package version
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var Cmd = &cobra.Command{
+	Use:   "version",
+	Short: "Show information about the current binary build",
+	Args:  cobra.NoArgs,
+	Run:   printBuildInfo,
+}
+
+func printBuildInfo(_ *cobra.Command, _ []string) {
+	buildInfo := GetBuildInfo()
+	fmt.Printf("Semantic version: %s\n", buildInfo.SemanticVersion)
+	fmt.Printf("Commit: %s\n", buildInfo.LastCommit)
+	fmt.Printf("Build Date: %s\n", buildInfo.BuildTime)
+	fmt.Printf("System version: %s\n", buildInfo.SystemVersion)
+	fmt.Printf("Golang version: %s\n", buildInfo.GolangVersion)
+}