Server setup in the app

mac/Sources/Byre/Startup.swift

@@ -199,6 +199,7 @@ final class Connection {
 final class ConnectForm {
     var serverText = ""
     var problem: String?
+    var missing: [Check] = []
     var connecting = false
 
     func connect() async -> URL? {
@@ -223,7 +224,14 @@ final class ConnectForm {
     func installHere() async -> URL? {
         connecting = true
         problem = nil
+        missing = []
         do {
+            let checks = try await Server.checks()
+            if !checks.ready {
+                missing = checks.checks.filter { !$0.ok }
+                connecting = false
+                return nil
+            }
             let origin = try await Server.turnOn()
             serverText = origin.absoluteString
             try await waitForServer(origin)
@@ -294,6 +302,16 @@ struct ConnectView: View {
     let connected: (URL) -> Void
 
     var body: some View {
+        GeometryReader { g in
+            ScrollView {
+                fields
+                    .padding(.vertical, 24)
+                    .frame(maxWidth: .infinity, minHeight: g.size.height)
+            }
+        }
+    }
+
+    private var fields: some View {
         VStack(alignment: .leading, spacing: 10) {
             Text("Server URL")
             TextField("https://byre.example.ts.net", text: $form.serverText)
@@ -310,9 +328,14 @@ struct ConnectView: View {
                     .textSelection(.enabled)
                     .fixedSize(horizontal: false, vertical: true)
             }
+            if !form.missing.isEmpty {
+                Text("byre can't run on this Mac yet. Install what's missing, then click Run byre on this Mac again.")
+                    .fixedSize(horizontal: false, vertical: true)
+                    .padding(.top, 6)
+                ChecksView(checks: form.missing)
+            }
         }
         .frame(width: 460)
-        .frame(maxWidth: .infinity, maxHeight: .infinity)
     }
 
     private func connect() {