build git commit hash into project

Makefile

@@ -0,0 +1,9 @@
+GIT_COMMIT = $(shell git rev-list -1 HEAD)
+SOURCES = $(shell find . -type f -and -name "*.go" -or -name "*.html")
+
+all: subscribe-bot
+
+subscribe-bot: $(SOURCES)
+	go build -o $@ -ldflags "-X main.GitCommit=$(GIT_COMMIT)"
+
+.PHONY: all

main.go

@@ -17,6 +17,8 @@ import (
 
 var exit_chan = make(chan int)
 
+var GitCommit string
+
 func main() {
 	configPath := flag.String("config", "config.toml", "Path to the config file (defaults to config.toml)")
 	flag.Parse()
@@ -40,7 +42,7 @@ func main() {
 	}
 
 	go scrape.RunScraper(&config, bot, db, api)
-	go web.RunWeb(&config, api)
+	go web.RunWeb(&config, api, GitCommit)
 
 	signal_chan := make(chan os.Signal, 1)
 	signal.Notify(signal_chan,

web/templates/master.html

@@ -27,6 +27,17 @@
             </div>
 
             {{ template "content" . }}
+
+            <footer>
+                <hr />
+                <small>
+                    Maintained by <a href="https://osu.ppy.sh/u/2688103" target="_blank">IOException</a>
+                    &middot;
+                    <a href="https://git.mzhang.io/osu/subscribe-bot" target="_blank">Source code</a>
+                    &middot;
+                    subscribe-bot v{{ GitCommit }}
+                </small>
+            </footer>
         </div>
     </body>
 </html>

web/web.go

@@ -2,6 +2,7 @@ package web
 
 import (
 	"fmt"
+	"html/template"
 	"io/ioutil"
 	"net/http"
 	"os"
@@ -33,14 +34,15 @@ type Web struct {
 	config  *config.Config
 	api     *osuapi.Osuapi
 	hc      *http.Client
+	version string
 }
 
-func RunWeb(config *config.Config, api *osuapi.Osuapi) {
+func RunWeb(config *config.Config, api *osuapi.Osuapi, version string) {
 	hc := &http.Client{
 		Timeout: 10 * time.Second,
 	}
 
-	web := Web{config, api, hc}
+	web := Web{config, api, hc, version}
 	web.Run()
 }
 
@@ -58,6 +60,11 @@ func (web *Web) Run() {
 		Root:         "web/templates",
 		Master:       "master.html",
 		DisableCache: web.config.Debug,
+		Funcs: template.FuncMap{
+			"GitCommit": func() string {
+				return web.version
+			},
+		},
 	})
 
 	r.GET("/logout", web.logout)