Split listing support: Gitea and Radicle as separate apps

- setup: with RUNNER_DIR, fetch the runner registration token from Gitea's
  admin API (POST /admin/actions/runners/registration-token) instead of the
  gitea CLI on Gitea's volume; record secrets/setup-status (ok, unreachable,
  bad-credentials) and exit cleanly when Gitea cannot be used.
- mirror: Radicle is optional. Repositories wait until a node is there (key and
  control socket in RAD_HOME), re-checked every reconcile; RADICLE=off.
- page: /status.json; hide the Radicle parts without a node, banner when Gitea
  is unreachable or refuses the login.
- example workflow: runs-on: ipcr, the forge's own runner label.
- docs: two listings, split (IPCR-Forge) and all in one (IPCR-Forge-AIO).

forge/bridge_test.go

@@ -180,7 +180,9 @@ func TestExampleEmbedded(t *testing.T) {
 func TestWeb(t *testing.T) {
 	dir := t.TempDir()
 	st, _ := loadState(filepath.Join(dir, "repos.json"))
-	h := webHandler(st, filepath.Join(dir, "published.json"))
+	h := webHandler(st, filepath.Join(dir, "published.json"), func() siteStatus {
+		return siteStatus{Gitea: readSetupStatus(dir), Radicle: false}
+	})
 	get := func(p string) (int, string) {
 		w := httptest.NewRecorder()
 		h.ServeHTTP(w, httptest.NewRequest("GET", p, nil))
@@ -199,11 +201,102 @@ func TestWeb(t *testing.T) {
 	if c, b := get("/repos.json"); c != 200 || strings.TrimSpace(b) != "[]" {
 		t.Errorf("/repos.json: %d %q", c, b)
 	}
+	if c, b := get("/status.json"); c != 200 || strings.TrimSpace(b) != `{"gitea":"unknown","radicle":false}` {
+		t.Errorf("/status.json before setup: %d %q", c, b)
+	}
+	writeSetupStatus(dir, setupBadCredentials)
+	if _, b := get("/status.json"); strings.TrimSpace(b) != `{"gitea":"bad-credentials","radicle":false}` {
+		t.Errorf("/status.json after setup: %q", b)
+	}
 	if c, _ := get("/nothing"); c != 404 {
 		t.Errorf("/nothing: %d", c)
 	}
 }
 
+// fakeGitea answers the few API calls a test needs; anything else is a 404.
+func fakeGitea(t *testing.T, routes map[string]http.HandlerFunc) *httptest.Server {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if h, ok := routes[r.Method+" "+r.URL.Path]; ok {
+			h(w, r)
+			return
+		}
+		http.NotFound(w, r)
+	}))
+	t.Cleanup(srv.Close)
+	return srv
+}
+
+// Without a Radicle node, a public repository waits (and nothing is fetched); with one, the mirror
+// would run (radicleReady is what gates it).
+func TestSyncWithoutRadicle(t *testing.T) {
+	dir := t.TempDir()
+	srv := fakeGitea(t, map[string]http.HandlerFunc{
+		"GET /api/v1/repositories/7": func(w http.ResponseWriter, r *http.Request) {
+			w.Write([]byte(`{"id":7,"name":"app","full_name":"metadec/app","default_branch":"main"}`))
+		},
+	})
+	st, _ := loadState(filepath.Join(dir, "repos.json"))
+	rad := filepath.Join(dir, "radicle-home")
+	m := &mirror{gitea: newGitea(srv.URL, "gitea_admin", filepath.Join(dir, "token")), state: st,
+		repoDir: filepath.Join(dir, "repos"), radHome: rad}
+	m.sync(7)
+	got := st.get(7)
+	if got.State != stWaiting || got.Error != errNoRadicle || got.FullName != "metadec/app" {
+		t.Errorf("without Radicle: %+v", got)
+	}
+	if _, err := os.Stat(m.repoDir); err == nil {
+		t.Error("fetched a mirror with no Radicle node to push it to")
+	}
+
+	os.MkdirAll(filepath.Join(rad, "keys"), 0o755)
+	os.WriteFile(filepath.Join(rad, "keys", "radicle"), []byte("k"), 0o600)
+	if m.radicleReady() {
+		t.Error("ready with a key but no running node")
+	}
+	os.MkdirAll(filepath.Join(rad, "node"), 0o755)
+	os.WriteFile(filepath.Join(rad, "node", "control.sock"), nil, 0o600)
+	if !m.radicleReady() {
+		t.Error("not ready with a key and a control socket")
+	}
+	m.radicleOff = true
+	if m.radicleReady() {
+		t.Error("RADICLE=off ignored")
+	}
+}
+
+func TestRunnerToken(t *testing.T) {
+	dir := t.TempDir()
+	calls := 0
+	srv := fakeGitea(t, map[string]http.HandlerFunc{
+		"POST /api/v1/admin/actions/runners/registration-token": func(w http.ResponseWriter, r *http.Request) {
+			calls++
+			if u, p, ok := r.BasicAuth(); !ok || u != "gitea_admin" || p != "pw" {
+				http.Error(w, "unauthorized", http.StatusUnauthorized)
+				return
+			}
+			w.Write([]byte(`{"token":"reg-123"}`))
+		},
+	})
+	g := newGitea(srv.URL, "gitea_admin", filepath.Join(dir, "gitea-token"))
+	g.password = "pw"
+	if err := ensureRunnerToken(g, dir); err != nil {
+		t.Fatal(err)
+	}
+	if b, _ := os.ReadFile(filepath.Join(dir, "token")); string(b) != "reg-123" {
+		t.Errorf("token file %q", b)
+	}
+	// Registered: left alone.
+	os.WriteFile(filepath.Join(dir, ".runner"), []byte(`{"id":1}`), 0o600)
+	if err := ensureRunnerToken(g, dir); err != nil || calls != 1 {
+		t.Errorf("registered runner: err %v, %d calls", err, calls)
+	}
+	g.password = "wrong"
+	os.Remove(filepath.Join(dir, ".runner"))
+	if err := ensureRunnerToken(g, dir); err == nil {
+		t.Error("refused token request not reported")
+	}
+}
+
 // The same vector as gateway/admin_test.go: a Kubo key and its name, and a backup of it that ipcrd
 // must be able to open.
 const (

forge/example/.gitea/workflows/build.yml

@@ -7,13 +7,15 @@
 #                              the forge sets on every repository allowed to publish
 #   images: localhost:5000/…   this repository's own name there (no other is accepted)
 #   network=host               so buildx's builder can reach that registry
+#   runs-on: ipcr              the forge's own runner, the one that sees that registry (a Gitea app's
+#                              own runner, if there is one, does not)
 name: image
 on:
   push:
     tags: ['v*']
 jobs:
   image:
-    runs-on: ubuntu-latest
+    runs-on: ipcr
     steps:
       - uses: actions/checkout@v4
       - uses: docker/login-action@v3

forge/main.go

@@ -22,7 +22,11 @@
 //	GITEA_PASSWORD   setup only: its password, used once to mint the token and the hook
 //	SECRETS_DIR      gitea-token and hook-secret (default /secrets)
 //	STATE_DIR        repos.json and the bare mirrors (default /forge)
-//	RAD_HOME         the node's Radicle home (default /radicle-home)
+//	RAD_HOME         the node's Radicle home (default /radicle-home). Optional: without a node
+//	                 there (no key, or no control socket) nothing is mirrored until one appears
+//	RADICLE          off: never mirror to Radicle (default auto)
+//	RUNNER_DIR       setup only: act_runner's data folder; when set and the runner is not
+//	                 registered, setup leaves a registration token there (the split listing)
 //	WEB_LISTEN       the page (default :8080)
 //	HOOK_LISTEN      the webhook, internal only (default :8081)
 //	HOOK_URL         setup only: how Gitea reaches HOOK_LISTEN (default http://ipcr-forge:8081/hooks/gitea)
@@ -111,10 +115,11 @@ func serve() error {
 	}
 	secrets := env("SECRETS_DIR", "/secrets")
 	m := &mirror{
-		gitea:   newGitea(env("GITEA_URL", "http://gitea:3000"), env("GITEA_OWNER", "gitea_admin"), secrets+"/gitea-token"),
-		state:   st,
-		repoDir: stateDir + "/repos",
-		radHome: env("RAD_HOME", "/radicle-home"),
+		gitea:      newGitea(env("GITEA_URL", "http://gitea:3000"), env("GITEA_OWNER", "gitea_admin"), secrets+"/gitea-token"),
+		state:      st,
+		repoDir:    stateDir + "/repos",
+		radHome:    env("RAD_HOME", "/radicle-home"),
+		radicleOff: env("RADICLE", "auto") == "off",
 	}
 	if err := os.MkdirAll(m.repoDir, 0o755); err != nil {
 		return err
@@ -129,7 +134,9 @@ func serve() error {
 		log.Fatal(http.ListenAndServe(env("HOOK_LISTEN", ":8081"), hmux))
 	}()
 
-	mux := webHandler(st, env("IPCR_PUBLISHED", "/srv/ipcr-state/published.json"))
+	mux := webHandler(st, env("IPCR_PUBLISHED", "/srv/ipcr-state/published.json"), func() siteStatus {
+		return siteStatus{Gitea: readSetupStatus(secrets), Radicle: m.radicleReady()}
+	})
 	if ipcr := os.Getenv("IPCR_ADMIN"); ipcr != "" {
 		au, err := newAuth(splitList(env("PUBLIC_HOSTS", "")), m.gitea.base, secrets, stateDir+"/session-key")
 		if err != nil {

forge/mirror.go

@@ -21,6 +21,8 @@ type mirror struct {
 	state   *state
 	repoDir string // one bare repository per Gitea repository: <id>.git
 	radHome string
+	// RADICLE=off: never mirror, whatever is mounted.
+	radicleOff bool
 	// Called after each reconcile pass (the admin pages keep IPCR's allowlist in step).
 	onReconcile func()
 }
@@ -56,6 +58,15 @@ func (m *mirror) sync(id int64) {
 		}
 		return
 	}
+	if !m.radicleReady() {
+		// No node (the split listing without the Radicle app, or the node not started yet). Nothing
+		// is fetched; the reconcile loop looks again, so installing Radicle later starts the mirror.
+		if cur.State != stWaiting || cur.Error != errNoRadicle {
+			cur.State, cur.Error = stWaiting, errNoRadicle
+			m.save(cur)
+		}
+		return
+	}
 	if err := m.publish(r, &cur); err != nil {
 		cur.State, cur.Error = stError, err.Error()
 		log.Printf("sync %s: %v", r.FullName, err)
@@ -65,6 +76,22 @@ func (m *mirror) sync(id int64) {
 	m.save(cur)
 }
 
+const errNoRadicle = "no Radicle node: mirrored once the Radicle app is installed and running"
+
+// radicleReady reports whether a Radicle node is there to mirror into: its key (rad auth ran) and
+// its control socket (the node runs) in RAD_HOME.
+func (m *mirror) radicleReady() bool {
+	if m.radicleOff {
+		return false
+	}
+	for _, p := range []string{"keys/radicle", "node/control.sock"} {
+		if _, err := os.Stat(filepath.Join(m.radHome, p)); err != nil {
+			return false
+		}
+	}
+	return true
+}
+
 func (m *mirror) save(r repoState) {
 	if err := m.state.put(r); err != nil {
 		log.Printf("state: %v", err)

forge/setup.go

@@ -5,6 +5,7 @@ import (
 	"embed"
 	"encoding/base64"
 	"encoding/hex"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io/fs"
@@ -58,9 +59,16 @@ func ensureOrg(g *gitea, org string) error {
 //	                         the root organisation when there is one.
 //	an OAuth2 application    the admin pages' Gitea login (PUBLIC_HOSTS → its redirect URIs);
 //	                         SECRETS_DIR/oauth-client-id and oauth-client-secret.
+//	RUNNER_DIR/token         when RUNNER_DIR is set and the runner there is not registered yet: a
+//	                         global runner registration token (the split listing, which cannot run
+//	                         `gitea actions generate-runner-token` on Gitea's own volume).
+//	SECRETS_DIR/setup-status how the last run went with Gitea (ok, unreachable, bad-credentials),
+//	                         for the forge's page.
 //
 // The admin password is used here only and never stored. If it was changed since install, the
-// step leaves the existing token and hook alone instead of failing the start.
+// step leaves the existing token and hook alone instead of failing the start. When Gitea cannot be
+// used at all (not installed, or the password is wrong and there is no token yet), the step records
+// why and exits cleanly: the page says what to do, and the next start tries again.
 func setup() error {
 	secrets := env("SECRETS_DIR", "/secrets")
 	g := newGitea(env("GITEA_URL", "http://gitea:3000"), env("GITEA_OWNER", "gitea_admin"), filepath.Join(secrets, "gitea-token"))
@@ -68,6 +76,11 @@ func setup() error {
 	if g.password == "" {
 		return errors.New("GITEA_PASSWORD is required")
 	}
+	status := func(s string) {
+		if err := writeSetupStatus(secrets, s); err != nil {
+			log.Printf("setup: status: %v", err)
+		}
+	}
 
 	// Gitea may still be migrating, and its admin account may not exist yet. Bounded: an install
 	// step that blocks forever holds the install open forever.
@@ -79,12 +92,20 @@ func setup() error {
 		}
 		if code == http.StatusUnauthorized && g.hasToken() {
 			log.Printf("setup: the admin password no longer works; keeping the existing token and webhook")
+			status(setupOK)
 			return nil
 		}
 		time.Sleep(3 * time.Second)
 	}
 	if err != nil {
-		return fmt.Errorf("Gitea not ready after 240s: %w", err)
+		if code == http.StatusUnauthorized {
+			log.Printf("setup: Gitea refuses %s's password, and there is no token yet: set the forge's Gitea admin credentials (%v)", g.owner, err)
+			status(setupBadCredentials)
+		} else {
+			log.Printf("setup: Gitea not reachable at %s after 240s, is the Gitea app installed? (%v)", g.base, err)
+			status(setupUnreachable)
+		}
+		return nil
 	}
 
 	if !g.hasToken() {
@@ -153,12 +174,54 @@ func setup() error {
 		}
 	}
 
+	if dir := os.Getenv("RUNNER_DIR"); dir != "" {
+		if err := ensureRunnerToken(g, dir); err != nil {
+			return fmt.Errorf("runner registration token: %w", err)
+		}
+	}
+
 	if name := env("EXAMPLE_REPO", "ipcr-hello"); name != "-" && name != "" {
 		// Not fatal: the forge works without its example.
 		if err := ensureExample(g, owner, name); err != nil {
 			log.Printf("setup: example repository: %v", err)
 		}
 	}
+	status(setupOK)
+	return nil
+}
+
+// What the last setup run found, in SECRETS_DIR/setup-status (read by the page, see web.go).
+const (
+	setupOK             = "ok"
+	setupUnreachable    = "unreachable"
+	setupBadCredentials = "bad-credentials"
+)
+
+func writeSetupStatus(secrets, s string) error {
+	b, _ := json.Marshal(map[string]string{"gitea": s})
+	return writeSecret(filepath.Join(secrets, "setup-status"), string(b))
+}
+
+// ensureRunnerToken leaves a global runner registration token in dir/token for act_runner, unless
+// the runner there is already registered (dir/.runner). Gitea returns the same token until it is
+// used, so a repeated call before registration is harmless.
+func ensureRunnerToken(g *gitea, dir string) error {
+	if b, err := os.ReadFile(filepath.Join(dir, ".runner")); err == nil && len(b) > 0 {
+		return nil
+	}
+	var t struct {
+		Token string `json:"token"`
+	}
+	if _, err := g.call("POST", "/admin/actions/runners/registration-token", nil, &t); err != nil {
+		return err
+	}
+	if t.Token == "" {
+		return errors.New("Gitea returned no token")
+	}
+	if err := writeSecret(filepath.Join(dir, "token"), t.Token); err != nil {
+		return err
+	}
+	log.Printf("setup: runner registration token written")
 	return nil
 }
 

forge/state.go

@@ -15,7 +15,7 @@ import (
 const (
 	stSynced  = "synced"  // Radicle has what Gitea has
 	stError   = "error"   // the last sync failed; retried on the next event or reconcile
-	stWaiting = "waiting" // empty repository: nothing to publish yet
+	stWaiting = "waiting" // empty repository, or no Radicle node yet: nothing to publish to
 	stFrozen  = "frozen"  // no longer public in Gitea (or deleted): no further sync, nothing retracted
 )
 

forge/web.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"net/http"
 	"os"
+	"path/filepath"
 )
 
 //go:embed web
@@ -13,7 +14,7 @@ var webFiles embed.FS
 // webHandler serves the forge's public page. Everything on it is public anyway: links, the
 // documentation, IPCR's list of published images (public on IPFS) and the list of mirrored
 // repositories (public on Radicle). Nothing here changes anything.
-func webHandler(st *state, publishedFile string) *http.ServeMux {
+func webHandler(st *state, publishedFile string, status func() siteStatus) *http.ServeMux {
 	mux := http.NewServeMux()
 	page, _ := webFiles.ReadFile("web/index.html")
 	icon, _ := webFiles.ReadFile("web/icon.png")
@@ -42,12 +43,36 @@ func webHandler(st *state, publishedFile string) *http.ServeMux {
 		w.Header().Set("Cache-Control", "no-store")
 		json.NewEncoder(w).Encode(st.list())
 	})
+	mux.HandleFunc("GET /status.json", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.Header().Set("Cache-Control", "no-store")
+		json.NewEncoder(w).Encode(status())
+	})
 	mux.HandleFunc("GET /healthz", func(w http.ResponseWriter, r *http.Request) {
 		w.Write([]byte("ok\n"))
 	})
 	return mux
 }
 
+// siteStatus is what the page needs to know about the apps the forge relies on: Gitea (as the
+// setup step last found it) and whether a Radicle node is there to mirror into.
+type siteStatus struct {
+	Gitea   string `json:"gitea"` // ok | unreachable | bad-credentials | unknown (setup has not run)
+	Radicle bool   `json:"radicle"`
+}
+
+// readSetupStatus reads what the setup step left in SECRETS_DIR/setup-status.
+func readSetupStatus(secrets string) string {
+	var s struct {
+		Gitea string `json:"gitea"`
+	}
+	b, err := os.ReadFile(filepath.Join(secrets, "setup-status"))
+	if err != nil || json.Unmarshal(b, &s) != nil || s.Gitea == "" {
+		return "unknown"
+	}
+	return s.Gitea
+}
+
 // adminRoutes adds the admin pages: the page itself (signed-in Gitea admins only), the login, and
 // the API it calls.
 func adminRoutes(mux *http.ServeMux, au *auth, adm *adminAPI) {

forge/web/index.html

@@ -67,6 +67,8 @@
   .scroll { overflow-x: auto; }
   .state { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
   .state.synced { color: var(--ok); } .state.waiting, .state.frozen { color: var(--warn); } .state.error { color: var(--bad); }
+  [hidden] { display: none !important; }
+  .banner { border: 1px solid var(--bad); border-radius: 8px; padding: 10px 14px; margin: 16px 0; }
   footer { margin-top: 48px; color: var(--muted); font-size: 13px; }
 </style>
 </head>
@@ -83,11 +85,12 @@
 <p class="lede">From <code>git push</code> to <code>docker pull</code> on any server. Work in Gitea as
 usual: its Actions build your images, IPCR serves them from IPFS, and every public repository is
 mirrored to the Radicle peer-to-peer network.</p>
+<div class="banner" id="status-banner" hidden></div>
 
 <div class="cards">
   <a class="card" id="link-gitea" href="#"><b>Gitea</b><span>Your repositories, pull requests, issues and builds. Sign in as <code>gitea_admin</code>.</span></a>
   <a class="card" href="#images"><b>Published images</b><span>What this forge serves from IPFS, with the line to put in a compose file.</span></a>
-  <a class="card" href="#repos"><b>On Radicle</b><span>The public repositories mirrored to the Radicle network. Public.</span></a>
+  <a class="card" href="#repos" data-radicle><b>On Radicle</b><span>The public repositories mirrored to the Radicle network. Public.</span></a>
 </div>
 
 <h2 id="how">How it works</h2>
@@ -102,7 +105,7 @@ mirrored to the Radicle peer-to-peer network.</p>
 </div>
 <p>Steps 2 and 3 are automatic and usually take a few minutes. The very first build on this server
 takes longer (about 5 to 10 minutes) while it downloads its build images.</p>
-<p>Alongside, every <b>public</b> repository is copied to <a class="radicle-link" href="#">Radicle</a>
+<p data-radicle>Alongside, every <b>public</b> repository is copied to <a class="radicle-link" href="#">Radicle</a>
 within seconds of each push: branches and tags, signed by this server's Radicle node. Gitea stays
 the one place to work. The Radicle copy is for distribution: anyone can <code>rad clone</code> it,
 and it stays available even when this server is not. Private repositories are never copied.</p>
@@ -131,7 +134,8 @@ git push -u origin main</code></pre>
     Applications</b>).</li>
   <li><b>Add a workflow</b> at <code>.gitea/workflows/build.yml</code>. This one builds the
     <code>Dockerfile</code> at the root for every <code>v*</code> tag. It is a GitHub-style
-    workflow with three differences: it logs in to <code>localhost:5000</code>, this forge's staging
+    workflow with four differences: it runs on <code>ipcr</code>, this forge's own runner (the
+    only one that reaches the staging registry), it logs in to <code>localhost:5000</code>, this forge's staging
     registry, as the repository itself (the forge sets the <code>IPCR_PUSH_TOKEN</code> secret on
     every public repository allowed to publish), the image goes there under the repository's own
     name, and buildx's builder runs with <code>network=host</code> so it can reach that registry.
@@ -141,7 +145,7 @@ on:
     tags: ['v*']
 jobs:
   image:
-    runs-on: ubuntu-latest
+    runs-on: ipcr
     steps:
       - uses: actions/checkout@v4
       - uses: docker/login-action@v3
@@ -200,7 +204,10 @@ image's content address and can never change.</p>
 <p class="muted">New releases need no change to either record: they update the publisher name.</p>
 
 <h2 id="repos">On Radicle</h2>
-<p>Public repositories of this forge, as mirrored to the Radicle network by this server's node
+<p id="no-radicle" class="note" hidden>No Radicle node on this server, so nothing is mirrored yet.
+Install the <b>Radicle</b> app from the store: every public repository is then mirrored within one
+reconcile (ten minutes at most).</p>
+<p data-radicle>Public repositories of this forge, as mirrored to the Radicle network by this server's node
 (<code id="node-id">…</code>). Clone one with <code>rad clone &lt;id&gt;</code> from any Radicle node.</p>
 <div id="repos-body"><p class="muted">Loading…</p></div>
 <p class="muted">A repository that turns private or is deleted in Gitea is no longer synced
@@ -235,8 +242,8 @@ for IPFS peers. Details: <a href="https://github.com/Yundera/ipcr" target="_blan
   <tr><th>Address</th><th>What</th></tr>
   <tr><td><a id="t-gitea" href="#"></a></td><td>Gitea: repositories, Actions, users (<code>gitea_admin</code>)</td></tr>
   <tr><td><a id="t-forge" href="#"></a></td><td>This page (public)</td></tr>
-  <tr><td><a id="t-radicle" href="#"></a></td><td>Radicle explorer (public)</td></tr>
-  <tr><td><a id="t-radicle-api" href="#"></a></td><td>Radicle API and read-only git over HTTPS (public)</td></tr>
+  <tr data-radicle><td><a id="t-radicle" href="#"></a></td><td>Radicle explorer (public)</td></tr>
+  <tr data-radicle><td><a id="t-radicle-api" href="#"></a></td><td>Radicle API and read-only git over HTTPS (public)</td></tr>
   <tr><td><code>ipcr.localhost:4767</code></td><td>IPCR registry, for this server's Docker only</td></tr>
   <tr><td><a id="t-ipcr" href="#"></a></td><td>Public front door: <code>docker pull</code> this forge's images from anywhere (read-only)</td></tr>
   <tr><td>TCP 8776 · TCP/UDP 4768</td><td>Radicle peers · IPFS peers</td></tr>
@@ -363,6 +370,27 @@ for IPFS peers. Details: <a href="https://github.com/Yundera/ipcr" target="_blan
       imagesBody.appendChild(el("p", "Nothing published yet. Tag v1.0.0 on the example repository (above), or push a v* tag from a repository with a workflow; its image appears here a few minutes later.", "muted"));
     });
 
+  // What the forge relies on: Gitea (as the setup step last found it), and a Radicle node to mirror
+  // into. The split listing installs neither, so either may be missing.
+  fetch("status.json", { cache: "no-store" })
+    .then(function (r) { return r.json(); })
+    .then(function (st) {
+      if (!st.radicle) {
+        all("[data-radicle]", function (e) { e.hidden = true; });
+        document.getElementById("no-radicle").hidden = false;
+      }
+      var msg = {
+        "unreachable": "Gitea is not reachable. This forge needs the Gitea app on this server: install it, then restart IPCR Forge.",
+        "bad-credentials": "Gitea refused the forge's admin login (gitea_admin and the server's default password, unless changed in the app's settings). Set FORGE_GITEA_ADMIN and FORGE_GITEA_PASSWORD to a Gitea site admin, then restart IPCR Forge."
+      }[st.gitea];
+      if (msg) {
+        var b = document.getElementById("status-banner");
+        b.textContent = msg;
+        b.hidden = false;
+      }
+    })
+    .catch(function () {});
+
   // Radicle mirrors: the forge service's state.
   var reposBody = document.getElementById("repos-body");
   fetch("repos.json", { cache: "no-store" })