Fix npx bootstrap: non-fatal postinstall and binary fallback

Author: lightsofapollo

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "attn"
-version = "0.1.16"
+version = "0.1.17"
 edition = "2024"
 description = "A beautiful markdown viewer that launches from the CLI"
 license = "MIT"

Cargo.toml

@@ -2,7 +2,6 @@
 
 const {
   chmodSync,
-  copyFileSync,
   createWriteStream,
   existsSync,
   mkdirSync,
@@ -58,10 +57,29 @@ async function main() {
   const args = process.argv.slice(2);
   const packageJson = JSON.parse(readFileSync(packageJsonPath, "utf8"));
   const version = packageJson.version;
-
-  const appPath = await resolveAppPath(version);
   const headless = isHeadlessInvocation(args);
 
+  let appPath = null;
+  try {
+    appPath = await resolveAppPath(version);
+  } catch (error) {
+    console.error(`attn: app install unavailable (${error.message}); falling back to binary.`);
+  }
+
+  if (!appPath) {
+    if (!existsSync(runtimeBinaryPath)) {
+      await ensureRuntimeBinary(version);
+    }
+    if (!existsSync(runtimeBinaryPath)) {
+      throw new Error("runtime binary is missing after fallback download attempt.");
+    }
+    if (isNpxInvocation) {
+      await maybePromptInstallAlias();
+    }
+    run(runtimeBinaryPath, args);
+    return;
+  }
+
   if (isNpxInvocation) {
     await maybePromptInstallAlias();
   }
@@ -100,6 +118,23 @@ async function resolveAppPath(version) {
   return managedVersionApp;
 }
 
+async function ensureRuntimeBinary(version) {
+  const assetSuffix = resolveAssetSuffix(process.platform, process.arch);
+  if (!assetSuffix) {
+    throw new Error(
+      `unsupported platform ${process.platform}/${process.arch}. Currently supported: darwin-arm64.`
+    );
+  }
+
+  const url = `https://github.com/lightsofapollo/attn/releases/download/v${version}/attn-v${version}-${assetSuffix}`;
+  const tempPath = `${runtimeBinaryPath}.tmp`;
+  mkdirSync(runtimeDir, { recursive: true });
+  await download(url, tempPath);
+  chmodSync(tempPath, 0o755);
+  renameSync(tempPath, runtimeBinaryPath);
+  console.error(`attn: installed runtime binary ${runtimeBinaryPath}`);
+}
+
 function findGlobalAppInstall() {
   const candidates = [
     "/Applications/attn.app",
@@ -303,4 +338,3 @@ function download(url, destination) {
     request.on("error", reject);
   });
 }
-

bin/attn.js

@@ -1,6 +1,6 @@
 {
   "name": "attnmd",
-  "version": "0.1.16",
+  "version": "0.1.17",
   "description": "A beautiful markdown viewer that launches from the CLI",
   "license": "MIT",
   "repository": {

package.json

@@ -39,8 +39,9 @@ download(url, tempPath)
   })
   .catch((error) => {
     safeRemove(tempPath);
-    console.error(`attn: failed to download release binary: ${error.message}`);
-    process.exit(1);
+    console.warn(`attn: runtime prefetch failed: ${error.message}`);
+    console.warn("attn: continuing; runtime will be installed on first launch.");
+    process.exit(0);
   });
 
 function resolveAssetSuffix(platform, arch) {