Route preview automation through live owner streams

apps/desktop/scripts/electron-launcher.mjs

@@ -100,25 +100,41 @@ function shellSingleQuote(value) {
   return `'${value.replaceAll("'", "'\\''")}'`;
 }
 
-function writeDevelopmentLauncherScript(targetBinaryPath, electronBinaryPath) {
-  const mainEntryPath = NodePath.join(desktopDir, "dist-electron", "main.cjs");
+export function makeDevelopmentLauncherScript({
+  electronBinaryPath,
+  mainEntryPath,
+  desktopRoot,
+  environment,
+}) {
   const envEntries = [
-    ["VITE_DEV_SERVER_URL", process.env.VITE_DEV_SERVER_URL],
-    ["T3CODE_PORT", process.env.T3CODE_PORT],
-    ["T3CODE_HOME", process.env.T3CODE_HOME],
-    ["T3CODE_COMMIT_HASH", process.env.T3CODE_COMMIT_HASH],
-    ["T3CODE_OTLP_TRACES_URL", process.env.T3CODE_OTLP_TRACES_URL],
-    ["T3CODE_OTLP_EXPORT_INTERVAL_MS", process.env.T3CODE_OTLP_EXPORT_INTERVAL_MS],
+    ["VITE_DEV_SERVER_URL", environment.VITE_DEV_SERVER_URL],
+    ["T3CODE_PORT", environment.T3CODE_PORT],
+    ["T3CODE_HOME", environment.T3CODE_HOME],
+    ["T3CODE_COMMIT_HASH", environment.T3CODE_COMMIT_HASH],
+    ["T3CODE_OTLP_TRACES_URL", environment.T3CODE_OTLP_TRACES_URL],
+    ["T3CODE_OTLP_EXPORT_INTERVAL_MS", environment.T3CODE_OTLP_EXPORT_INTERVAL_MS],
     ["T3CODE_DESKTOP_APP_USER_MODEL_ID", APP_BUNDLE_ID],
   ].filter((entry) => typeof entry[1] === "string" && entry[1].trim().length > 0);
+  return [
+    "#!/bin/sh",
+    ...envEntries.map(
+      ([name, value]) =>
+        `if [ -z "\${${name}:-}" ]; then export ${name}=${shellSingleQuote(value)}; fi`,
+    ),
+    `exec ${shellSingleQuote(electronBinaryPath)} --t3code-dev-root=${shellSingleQuote(desktopRoot)} ${shellSingleQuote(mainEntryPath)} "$@"`,
+    "",
+  ].join("\n");
+}
+
+function writeDevelopmentLauncherScript(targetBinaryPath, electronBinaryPath) {
   NodeFS.writeFileSync(
     targetBinaryPath,
-    [
-      "#!/bin/sh",
-      ...envEntries.map(([name, value]) => `export ${name}=${shellSingleQuote(value)}`),
-      `exec ${shellSingleQuote(electronBinaryPath)} --t3code-dev-root=${shellSingleQuote(desktopDir)} ${shellSingleQuote(mainEntryPath)} "$@"`,
-      "",
-    ].join("\n"),
+    makeDevelopmentLauncherScript({
+      electronBinaryPath,
+      mainEntryPath: NodePath.join(desktopDir, "dist-electron", "main.cjs"),
+      desktopRoot: desktopDir,
+      environment: process.env,
+    }),
   );
   NodeFS.chmodSync(targetBinaryPath, 0o755);
 }
@@ -286,6 +302,12 @@ function buildMacLauncher(electronBinaryPath) {
     currentMetadata &&
     JSON.stringify(currentMetadata) === JSON.stringify(expectedMetadata)
   ) {
+    if (isDevelopment) {
+      // The launcher also handles protocol activations outside the dev runner,
+      // so refresh its fallback environment on every launch. Never let a value
+      // captured by an older parent app override the live dev-runner environment.
+      writeDevelopmentLauncherScript(targetBinaryPath, electronBinaryPath);
+    }
     registerMacLauncherBundle(targetAppBundlePath);
     return targetBinaryPath;
   }

apps/desktop/scripts/electron-launcher.test.mjs

@@ -0,0 +1,28 @@
+import { assert, describe, it } from "vite-plus/test";
+
+import { makeDevelopmentLauncherScript } from "./electron-launcher.mjs";
+
+describe("electron development launcher", () => {
+  it("uses captured values only as fallbacks for a live runner environment", () => {
+    const script = makeDevelopmentLauncherScript({
+      electronBinaryPath: "/repo/node_modules/electron/Electron",
+      mainEntryPath: "/repo/apps/desktop/dist-electron/main.cjs",
+      desktopRoot: "/repo/apps/desktop",
+      environment: {
+        VITE_DEV_SERVER_URL: "http://127.0.0.1:8526",
+        T3CODE_PORT: "16566",
+        T3CODE_HOME: "/tmp/t3",
+      },
+    });
+
+    assert.include(
+      script,
+      "if [ -z \"${VITE_DEV_SERVER_URL:-}\" ]; then export VITE_DEV_SERVER_URL='http://127.0.0.1:8526'; fi",
+    );
+    assert.notInclude(script, "\nexport VITE_DEV_SERVER_URL=");
+    assert.include(
+      script,
+      "exec '/repo/node_modules/electron/Electron' --t3code-dev-root='/repo/apps/desktop' '/repo/apps/desktop/dist-electron/main.cjs' \"$@\"",
+    );
+  });
+});