fix(install): use arch-aware install dir and mkdir -p to fix fresh macOS

On Apple Silicon new machines /usr/local/bin does not exist; Homebrew
installs to /opt/homebrew instead. The -w check returned false for the
missing directory, causing sudo mv to also fail with "No such file or
directory". Now selects /opt/homebrew/bin on arm64 (when present) and
falls back to /usr/local/bin on x86_64, creating the directory first if
it does not exist.

Author: fullstackjam

src/lib/server/install-script.test.ts

@@ -196,4 +196,13 @@ describe('generateInstallScript', () => {
 
 		expect(script).toContain('openboot install "testuser/my-config" "$@"');
 	});
+
+	it('should use /opt/homebrew/bin on arm64 and mkdir -p if dir is missing', () => {
+		const script = generateInstallScript('testuser', 'my-config');
+
+		expect(script).toContain('/opt/homebrew/bin');
+		expect(script).toContain('mkdir -p');
+		// must not assume /usr/local/bin always exists
+		expect(script).not.toMatch(/sudo mv \/tmp\/openboot-install \/usr\/local\/bin\/openboot/);
+	});
 });

src/lib/server/install-script.ts

@@ -227,10 +227,21 @@ install_openboot() {
   curl -fsSL "\$binary_url" -o /tmp/openboot-install
   chmod +x /tmp/openboot-install
 
-  if [[ -w "/usr/local/bin" ]]; then
-    mv /tmp/openboot-install /usr/local/bin/openboot
+  local install_dir
+  if [[ "\$arch_name" == "arm64" ]] && [[ -d "/opt/homebrew/bin" ]]; then
+    install_dir="/opt/homebrew/bin"
   else
-    sudo mv /tmp/openboot-install /usr/local/bin/openboot
+    install_dir="/usr/local/bin"
+  fi
+
+  if [[ ! -d "\$install_dir" ]]; then
+    sudo mkdir -p "\$install_dir"
+  fi
+
+  if [[ -w "\$install_dir" ]]; then
+    mv /tmp/openboot-install "\$install_dir/openboot"
+  else
+    sudo mv /tmp/openboot-install "\$install_dir/openboot"
   fi
 
   echo ""