Version

* log on startup
* display on about page
* use compile flag
* set with git tag value

.drone.yml

@@ -30,6 +30,7 @@ steps:
     settings:
       registry: reg.meutel.net
       repo: reg.meutel.net/go-bouquins
+      build_args: "version=$DRONE_TAG"
       username: 
         from_secret: registry_login
       password: 
@@ -73,6 +74,6 @@ trigger:
 
 ---
 kind: signature
-hmac: 402ef53d245969c2df4d6ec14d51d3d9665856c8fa0ec8248755a209fb66ff36
+hmac: 6d31a8c73df2a63f6f04334ebf20ad9c7e4a992acb15097b1f887433748f0fd7
 
 ...

Dockerfile

@@ -1,11 +1,12 @@
 FROM golang as builder
 
+ARG version
 WORKDIR /go/src/meutel.net/meutel/go-bouquins
 
 COPY . .
 
 RUN GO111MODULE=on go get .
-RUN GO111MODULE=on CGO_ENABLED=1 GOOS=linux go build -a -installsuffix cgo -o app .
+RUN GO111MODULE=on CGO_ENABLED=1 GOOS=linux go build -ldflags "-X main.version=$version" -a -installsuffix cgo -o app .
 RUN curl -X POST -s --data-urlencode 'input@assets/css/bouquins.css' https://cssminifier.com/raw > assets/css/bouquins.min.css
 
 # deployment image

README.md

@@ -15,6 +15,12 @@ Bouquins in Go
 * JS: https://www.danstools.com/javascript-minify/
 * CSS: curl -X POST -s --data-urlencode 'input@assets/css/bouquins.css' https://cssminifier.com/raw > assets/css/bouquins.min.css
 
+## Versionning
+
+Build with flag to define `main.version`
+
+    go build -ldflags "-X main.version=myVersion"
+
 ## Deployment archive
 
 tar czf ~/tmp/go-bouquins.tar.gz go-bouquins assets/ templates/

bouquins/bouquins.go

@@ -19,9 +19,6 @@ import (
 )
 
 const (
-	// Version defines application version
-	Version = "master"
-
 	tplBooks    = "book.html"
 	tplAuthors  = "author.html"
 	tplSeries   = "series.html"
@@ -56,11 +53,11 @@ const (
 	// URLAbout url of about page
 	URLAbout = "/about/"
 	// URLJs url of js assets
-	URLJs = "/" + Version + "/js/"
+	URLJs = "/js/"
 	// URLCss url of css assets
-	URLCss = "/" + Version + "/css/"
+	URLCss = "/css/"
 	// URLFonts url of fonts assets
-	URLFonts = "/" + Version + "/webfonts/"
+	URLFonts = "/webfonts/"
 	// URLCalibre url of calibre resources (covers, ebooks files)
 	URLCalibre = "/calibre/"
 )
@@ -186,7 +183,6 @@ type SeriesFull struct {
 type Model struct {
 	Title    string
 	Page     string
-	Version  string
 	Username string
 }
 
@@ -195,7 +191,6 @@ func (app *Bouquins) NewModel(title, page string, req *http.Request) *Model {
 	return &Model{
 		Title:    title,
 		Page:     page,
-		Version:  Version,
 		Username: app.Username(req),
 	}
 }
@@ -285,18 +280,21 @@ type ReqParams struct {
 }
 
 // TemplatesFunc adds functions to templates
-func TemplatesFunc(prod bool) *template.Template {
+func TemplatesFunc(prod bool, version string) *template.Template {
 	return template.New("").Funcs(template.FuncMap{
 		"assetUrl": func(name string, ext string) string {
 			sep := "."
 			if prod {
 				sep = ".min."
 			}
-			return "/" + Version + "/" + ext + "/" + name + sep + ext
+			return "/" + ext + "/" + name + sep + ext
 		},
 		"humanSize": func(sz int64) string {
 			return datasize.ByteSize(sz).HumanReadable()
 		},
+		"version": func() string {
+			return version
+		},
 		"bookCover": func(book *BookFull) string {
 			fmt.Println(book.Path)
 			return "/calibre/" + url.PathEscape(book.Path) + "/cover.jpg"

main.go

@@ -2,11 +2,12 @@ package main
 
 import (
 	"database/sql"
-	"gopkg.in/yaml.v2"
 	"log"
 	"net/http"
 	"os"
 
+	"gopkg.in/yaml.v2"
+
 	"golang.org/x/oauth2"
 
 	"github.com/gorilla/sessions"
@@ -15,6 +16,10 @@ import (
 	"meutel.net/meutel/go-bouquins/bouquins"
 )
 
+var (
+	version string
+)
+
 // ReadConfig loads configuration file and initialize default value
 func ReadConfig() (*bouquins.Conf, error) {
 	conf := new(bouquins.Conf)
@@ -53,7 +58,7 @@ func initApp() *bouquins.Bouquins {
 		log.Fatalln(err)
 	}
 
-	tpl, err := bouquins.TemplatesFunc(conf.Prod).ParseGlob("templates/*.html")
+	tpl, err := bouquins.TemplatesFunc(conf.Prod, version).ParseGlob("templates/*.html")
 	if err != nil {
 		log.Fatalln(err)
 	}
@@ -86,9 +91,9 @@ func initApp() *bouquins.Bouquins {
 }
 
 func assets(calibre string) {
-	http.Handle(bouquins.URLJs, http.StripPrefix("/"+bouquins.Version, http.FileServer(http.Dir("assets"))))
+	http.Handle(bouquins.URLJs, http.FileServer(http.Dir("assets")))
-	http.Handle(bouquins.URLCss, http.StripPrefix("/"+bouquins.Version, http.FileServer(http.Dir("assets"))))
+	http.Handle(bouquins.URLCss, http.FileServer(http.Dir("assets")))
-	http.Handle(bouquins.URLFonts, http.StripPrefix("/"+bouquins.Version, http.FileServer(http.Dir("assets"))))
+	http.Handle(bouquins.URLFonts, http.FileServer(http.Dir("assets")))
 }
 
 func handle(f func(res http.ResponseWriter, req *http.Request) error) func(res http.ResponseWriter, req *http.Request) {
@@ -120,6 +125,7 @@ func router(app *bouquins.Bouquins) {
 }
 
 func main() {
+	log.Println("go-bouquins", version)
 	app := initApp()
 	defer app.DB.Close()
 	defer app.UserDB.Close()

templates/about.html

@@ -1,5 +1,6 @@
 {{ template "header.html" . }}
 <div class="container" id="about">
+  <p>go-bouquins {{ version }}</p>
   <p><b>bouquins</b> est une interface web pour le gestionnaire de livres numériques <a href="https://calibre-ebook.com/">calibre</a>. Cette version utilise le langage <a href="https://golang.org/">Go</a>, le framework <a href="https://getbootstrap.com/">bootstap</a> et le framework <a href="https://vuejs.org/">Vue.js</a>.</p>
   <p>Ce logiciel est open-source et distribué sous <a href="https://opensource.org/licenses/BSD-3-Clause">license BSD</a>. Le code source est disponible ici: <a href="https://git.meutel.net/meutel/go-bouquins">https://git.meutel.net/meutel/go-bouquins</a>.
 </div>