Add git info to version

Dockerfile

@@ -17,6 +17,12 @@ RUN mkdir -p /src/ui/build
 RUN apk add -U --no-cache build-base git
 RUN go get -u github.com/go-bindata/go-bindata/...
 
+# Download and unpack static ffmpeg
+ARG FFMPEG_VERSION=4.1.4
+ARG FFMPEG_URL=https://www.johnvansickle.com/ffmpeg/old-releases/ffmpeg-${FFMPEG_VERSION}-amd64-static.tar.xz
+RUN wget -O /tmp/ffmpeg.tar.xz ${FFMPEG_URL}
+RUN cd /tmp && tar xJf ffmpeg.tar.xz && rm ffmpeg.tar.xz
+
 # Download project dependencies
 WORKDIR /src
 COPY go.mod go.sum ./
@@ -30,13 +36,6 @@ COPY --from=jsbuilder /src/build/static/js/* /src/ui/build/static/js/
 RUN rm -rf /src/build/css /src/build/js
 RUN make buildall
 
-# Download and unpack static ffmpeg
-ARG FFMPEG_VERSION=4.1.4
-ARG FFMPEG_URL=https://www.johnvansickle.com/ffmpeg/old-releases/ffmpeg-${FFMPEG_VERSION}-amd64-static.tar.xz
-RUN wget -O /tmp/ffmpeg.tar.xz ${FFMPEG_URL}
-RUN cd /tmp && tar xJf ffmpeg.tar.xz && rm ffmpeg.tar.xz
-
-
 #####################################################
 ### Build Final Image
 FROM alpine

Makefile

@@ -1,6 +1,11 @@
 GO_VERSION=1.13
 NODE_VERSION=v13.7.0
 
+GIT_HASH=$(shell git rev-parse --short HEAD)
+GIT_BRANCH=$(shell git symbolic-ref --short -q HEAD)
+GIT_TAG=$(shell git describe --tags --abbrev=0 2> /dev/null)
+GIT_COUNT=$(shell git rev-list HEAD --count)
+
 .PHONY: dev
 dev: check_env data
 	@goreman -f Procfile.dev -b 4533 start
@@ -22,10 +27,6 @@ test: check_go_env
 testall: check_go_env test
 	@(cd ./ui && npm test -- --watchAll=false)
 
-.PHONY: build
-build: check_go_env
-	go build
-
 .PHONY: setup
 setup: Jamstash-master
 	@which reflex     || (echo "Installing Reflex"   && GO111MODULE=off go get -u github.com/cespare/reflex)
@@ -69,7 +70,12 @@ ui/build: $(UI_SRC) $(UI_PUBLIC) ui/package-lock.json
 assets/embedded_gen.go: ui/build
 	go-bindata -fs -prefix "ui/build" -tags embed -nocompress -pkg assets -o assets/embedded_gen.go ui/build/...
 
+.PHONY: build
+build: check_go_env
+	go build -ldflags="-X main.gitCount=$(GIT_COUNT) -X main.gitHash=$(GIT_HASH) -X main.gitBranch=$(GIT_BRANCH) -X main.gitTag=$(GIT_TAG)"
+
 .PHONY: buildall
 buildall: check_go_env assets/embedded_gen.go
-	go build -tags embed
+	go build -ldflags="-X main.gitCount=$(GIT_COUNT) -X main.gitHash=$(GIT_HASH) -X main.gitBranch=$(GIT_BRANCH) -X main.gitTag=$(GIT_TAG)" \
+  		-tags embed
 

banner.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/deluan/navidrome/static"
+)
+
+var (
+	// This will be set in build time. If not, version will be set to "dev"
+	gitBranch string
+	gitTag    string
+	gitHash   string
+	gitCount  string
+)
+
+// Formats:
+// dev
+// v0.2.0 (596-5b84188)
+// master (600-9ed35cb)
+func getVersion() string {
+	if gitHash == "" {
+		return "dev"
+	}
+	version := fmt.Sprintf(" (%s-%s)", gitCount, gitHash)
+	if gitTag != "" {
+		return gitTag + version
+	}
+	return gitBranch + version
+}
+
+func getBanner() string {
+	data, _ := static.Asset("banner.txt")
+	return strings.TrimSuffix(string(data), "\n")
+}
+
+func ShowBanner() {
+	version := "Version: " + getVersion()
+	padding := strings.Repeat(" ", 52-len(version))
+	fmt.Printf("%s%s%s\n\n", getBanner(), padding, version)
+}

main.go

@@ -1,18 +1,9 @@
 package main
 
 import (
-	"fmt"
-
 	"github.com/deluan/navidrome/conf"
-	"github.com/deluan/navidrome/server"
-	"github.com/deluan/navidrome/static"
 )
 
-func ShowBanner() {
-	banner, _ := static.Asset("banner.txt")
-	fmt.Printf(string(banner), server.Version)
-}
-
 func main() {
 	conf.Load()
 

server/server.go

@@ -15,8 +15,6 @@ import (
 	"github.com/go-chi/cors"
 )
 
-const Version = "0.2.0"
-
 type Server struct {
 	Scanner *scanner.Scanner
 	router  *chi.Mux

static/banner.txt

@@ -4,5 +4,3 @@
 | . ` |/ _` \ \ / / |/ _` | '__/ _ \| '_ ` _ \ / _ \
 | |\  | (_| |\ V /| | (_| | | | (_) | | | | | |  __/
 \_| \_/\__,_| \_/ |_|\__,_|_|  \___/|_| |_| |_|\___|
-                                       Version %s
-

static/bindata.go

@@ -150,7 +150,6 @@ var _bannerTxt = []byte(` _   _             _     _
 | . ` + "`" + ` |/ _` + "`" + ` \ \ / / |/ _` + "`" + ` | '__/ _ \| '_ ` + "`" + ` _ \ / _ \
 | |\  | (_| |\ V /| | (_| | | | (_) | | | | | |  __/
 \_| \_/\__,_| \_/ |_|\__,_|_|  \___/|_| |_| |_|\___|
-                                       Version %s
 
 `)
 
@@ -164,7 +163,7 @@ func bannerTxt() (*asset, error) {
 		return nil, err
 	}
 
-	info := bindataFileInfo{name: "banner.txt", size: 317, mode: os.FileMode(420), modTime: time.Unix(1579927428, 0)}
+	info := bindataFileInfo{name: "banner.txt", size: 267, mode: os.FileMode(420), modTime: time.Unix(1579965459, 0)}
 	a := &asset{bytes: bytes, info: info}
 	return a, nil
 }