feat: App - Support setting base URL during build

packages/app/src/app.tsx

@@ -279,6 +279,7 @@ export function AppInterface(props: {
           <GlobalSyncProvider>
             <Dynamic
               component={props.router ?? Router}
+              base={import.meta.env.BASE_URL.replace(/\/$/, "") || undefined}
               root={(routerProps) => <RouterRoot appChildren={props.children}>{routerProps.children}</RouterRoot>}
             >
               <Route path="/" component={HomeRoute} />

packages/app/src/entry.tsx

@@ -98,10 +98,13 @@ if (!(root instanceof HTMLElement) && import.meta.env.DEV) {
 }
 
 const getCurrentUrl = () => {
+  let serverBaseUrl = import.meta.env.VITE_OPENCODE_SERVER_BASE_URL ?? ""
+  // Normalizing slashes. Add starting slash if needed, remove trailing slash. Default value will be empty string.
+  serverBaseUrl = ("/" + serverBaseUrl.replace(/^\//, "")).replace(/\/$/, "")
   if (location.hostname.includes("opencode.ai")) return "http://localhost:4096"
   if (import.meta.env.DEV)
-    return `http://${import.meta.env.VITE_OPENCODE_SERVER_HOST ?? "localhost"}:${import.meta.env.VITE_OPENCODE_SERVER_PORT ?? "4096"}`
-  return location.origin
+    return `http://${import.meta.env.VITE_OPENCODE_SERVER_HOST ?? "localhost"}:${import.meta.env.VITE_OPENCODE_SERVER_PORT ?? "4096"}{serverBaseUrl}`
+  return location.origin + serverBaseUrl
 }
 
 const getDefaultUrl = () => {

packages/app/src/env.d.ts

@@ -1,6 +1,7 @@
 import "solid-js"
 
 interface ImportMetaEnv {
+  readonly BASE_URL: string
   readonly VITE_OPENCODE_SERVER_HOST: string
   readonly VITE_OPENCODE_SERVER_PORT: string
 }

packages/app/vite.config.ts

@@ -2,6 +2,7 @@ import { defineConfig } from "vite"
 import desktopPlugin from "./vite"
 
 export default defineConfig({
+  base: process.env.VITE_BASE_URL || "/",
   plugins: [desktopPlugin] as any,
   server: {
     host: "0.0.0.0",