Show deployment version

Dockerfile

@@ -1,10 +1,11 @@
 FROM golang:1.25-alpine AS builder
+ARG GIT_COMMIT=unknown
 WORKDIR /build
 COPY go.mod go.sum ./
 RUN go mod download
 COPY *.go ./
 COPY migrations/ ./migrations/
-RUN CGO_ENABLED=0 go build -o dmrmap .
+RUN CGO_ENABLED=0 go build -ldflags "-X main.version=${GIT_COMMIT}" -o dmrmap .
 
 FROM alpine:3.19
 WORKDIR /app

compose.yml

@@ -10,7 +10,10 @@ services:
     restart: unless-stopped
 
   dmrmap:
-    build: .
+    build:
+      context: .
+      args:
+        GIT_COMMIT: ${GIT_COMMIT:-unknown}
     depends_on:
       - postgres
     environment:

main.go

@@ -6,6 +6,8 @@ import (
 	"os"
 )
 
+var version = "dev"
+
 func main() {
 	dsn := envOr("DATABASE_URL", "postgres://dmrmap:dmrmap@localhost:5432/dmrmap?sslmode=disable")
 	jsonPath := envOr("JSON_PATH", "rptrs.json")
@@ -38,6 +40,7 @@ func main() {
 	mux.HandleFunc("/api/repeaters/route", handleRouteRepeaters(db))
 	mux.HandleFunc("/api/repeater", handleRepeaterByID(db))
 	mux.HandleFunc("/api/repeaters/search", handleSearchRepeaters(db))
+	mux.HandleFunc("/api/version", handleVersion())
 
 	if adminToken := os.Getenv("ADMIN_TOKEN"); adminToken != "" {
 		mux.HandleFunc("/admin/", handleAdminPage())
@@ -58,6 +61,13 @@ func main() {
 	log.Fatal(http.ListenAndServe(addr, mux))
 }
 
+func handleVersion() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.Write([]byte(`{"version":"` + version + `"}`))
+	}
+}
+
 func envOr(key, fallback string) string {
 	if v := os.Getenv(key); v != "" {
 		return v

static/app.js

@@ -1515,6 +1515,20 @@
 
     window.addEventListener("hashchange", checkHash);
 
+    // === Version ===
+    fetch("/api/version")
+        .then(function (resp) { return resp.json(); })
+        .then(function (data) {
+            if (data.version && data.version !== "dev" && data.version !== "unknown") {
+                var el = document.getElementById("app-version");
+                if (el) {
+                    el.textContent = data.version;
+                    el.parentElement.style.display = "";
+                }
+            }
+        })
+        .catch(function () {});
+
     // === Init ===
     fetchTgRegistry();
 

static/index.html

@@ -73,7 +73,7 @@
             Routing by <a href="https://project-osrm.org" target="_blank" rel="noopener">OSRM</a>.
             Map by <a href="https://www.openstreetmap.org/copyright" target="_blank" rel="noopener">OpenStreetMap</a>.
             Built by <a rel="me" href="https://social.darc.de/@DA6KM" target="_blank" rel="noopener">DA6KM</a>.<br>
-            <a href="/impressum.html" id="link-impressum" data-i18n="impressum">Impressum</a> · <a href="/datenschutz.html" id="link-datenschutz" data-i18n="datenschutz">Datenschutz</a> · <a href="https://git.kida.io/marcus/DMRmap" target="_blank" rel="noopener" data-i18n="source">Source</a><br>
+            <a href="/impressum.html" id="link-impressum" data-i18n="impressum">Impressum</a> · <a href="/datenschutz.html" id="link-datenschutz" data-i18n="datenschutz">Datenschutz</a> · <a href="https://git.kida.io/marcus/DMRmap" target="_blank" rel="noopener" data-i18n="source">Source</a> <span class="app-version" style="display:none">(<code id="app-version"></code>)</span><br>
         </div>
     </div>
     <div id="cps-modal" class="cps-modal" style="display:none">

static/style.css

@@ -593,6 +593,10 @@ html, body {
     color: var(--text-faint);
 }
 
+.app-version code {
+    font-size: 10px;
+}
+
 /* Popups */
 
 .rptr-popup h3 {