version: add commit id to binary during build

Makefile

@@ -1,5 +1,7 @@
 export GO111MODULE=on
 TOP_LEVEL=$(shell git rev-parse --show-toplevel)
+COMMIT_HASH=$(shell git describe --always --tags --long)
+COMMIT=$(if $(shell git status --porcelain --untracked-files=no),$(COMMIT_HASH)-dirty,$(COMMIT_HASH))
 CONTAINER_RUNTIME := $(shell command -v podman 2> /dev/null || echo docker)
 PATH := bin:$(PATH)
 
@@ -8,11 +10,11 @@ all: doc binary debug test check
 
 .PHONY: binary
 binary: doc
-	go build -v -o bin/zot -tags=jsoniter ./cmd/zot
+	go build -v -ldflags "-X  github.com/anuvu/zot/pkg/api.Commit=${COMMIT}" -o bin/zot -tags=jsoniter ./cmd/zot
 
 .PHONY: debug
 debug: doc
-	go build -v -gcflags all='-N -l' -o bin/zot-debug -tags=jsoniter ./cmd/zot
+	go build -v -gcflags all='-N -l' -ldflags "-X  github.com/anuvu/zot/pkg/api.Commit=${COMMIT}" -o bin/zot-debug -tags=jsoniter ./cmd/zot
 
 .PHONY: test
 test:

pkg/api/config.go

@@ -4,6 +4,9 @@ import (
 	dspec "github.com/opencontainers/distribution-spec"
 )
 
+//nolint (gochecknoglobals)
+var Commit string
+
 type StorageConfig struct {
 	RootDirectory string
 }
@@ -39,6 +42,7 @@ type LogConfig struct {
 
 type Config struct {
 	Version string
+	Commit  string
 	Storage StorageConfig
 	HTTP    HTTPConfig
 	Log     LogConfig `mapstructure:",omitempty"`
@@ -47,6 +51,7 @@ type Config struct {
 func NewConfig() *Config {
 	return &Config{
 		Version: dspec.Version,
+		Commit:  Commit,
 		HTTP:    HTTPConfig{Address: "127.0.0.1", Port: "8080"},
 		Log:     LogConfig{Level: "debug"},
 	}

pkg/cli/root.go

@@ -85,7 +85,7 @@ func NewRootCmd() *cobra.Command {
 		Long:  "`zot`",
 		Run: func(cmd *cobra.Command, args []string) {
 			if showVersion {
-				log.Info().Str("version", dspec.Version).Msg("distribution-spec")
+				log.Info().Str("distribution-spec", dspec.Version).Str("commit", api.Commit).Msg("version")
 			}
 			_ = cmd.Usage()
 		},