Prefer DEB over RPM

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@open-audio-stack/core",
-  "version": "0.1.43",
+  "version": "0.1.44",
   "description": "Open-source audio plugin management software",
   "type": "module",
   "main": "./build/index.js",

src/classes/ManagerLocal.ts

@@ -206,8 +206,16 @@ export class ManagerLocal extends Manager {
     const excludedFormats: FileFormat[] = [];
     const system = getSystem();
     if (system === SystemType.Linux) {
-      if (!(await commandExists('dpkg'))) excludedFormats.push(FileFormat.DebianPackage);
-      if (!(await commandExists('rpm'))) excludedFormats.push(FileFormat.RedHatPackage);
+      const hasDpkg = await commandExists('dpkg');
+      const hasRpm = await commandExists('rpm');
+      // If both exist, prefer DEB over RPM
+      if (hasDpkg && hasRpm) {
+        excludedFormats.push(FileFormat.RedHatPackage);
+      } else if (!hasDpkg) {
+        excludedFormats.push(FileFormat.DebianPackage);
+      } else if (!hasRpm) {
+        excludedFormats.push(FileFormat.RedHatPackage);
+      }
     }
     const files: FileInterface[] = packageCompatibleFiles(
       pkgVersion,

tests/helpers/package.test.ts

@@ -1,7 +1,15 @@
 import { expect, test } from 'vitest';
-import { packageRecommendations, packageVersionLatest, PackageVersionValidator } from '../../src/helpers/package.js';
+import {
+  packageCompatibleFiles,
+  packageRecommendations,
+  packageVersionLatest,
+  PackageVersionValidator,
+} from '../../src/helpers/package.js';
 import { PLUGIN, PLUGIN_PACKAGE_MULTIPLE } from '../data/Plugin';
 import { PackageVersion } from '../../src/types/Package';
+import { Architecture } from '../../src/types/Architecture.js';
+import { SystemType } from '../../src/types/SystemType.js';
+import { FileFormat } from '../../src/types/FileFormat.js';
 
 test('Package version latest', () => {
   expect(packageVersionLatest(PLUGIN_PACKAGE_MULTIPLE)).toEqual('1.3.2');
@@ -64,3 +72,32 @@ test('Package validate invalid type', () => {
     },
   ]);
 });
+
+test('Package compatible files returns empty when only unsupported formats exist', () => {
+  const rpmOnlyPackage: PackageVersion = {
+    ...PLUGIN,
+    files: [PLUGIN.files[1]], // Only the RPM file
+  };
+  const excludedResult = packageCompatibleFiles(
+    rpmOnlyPackage,
+    [Architecture.X64],
+    [SystemType.Linux],
+    [FileFormat.RedHatPackage],
+  );
+  expect(excludedResult).toHaveLength(0);
+});
+
+test('Package compatible files respects exclusions when alternatives exist', () => {
+  const bothFormatsPackage: PackageVersion = {
+    ...PLUGIN,
+    files: [PLUGIN.files[0], PLUGIN.files[1]], // DEB and RPM files
+  };
+  const result = packageCompatibleFiles(
+    bothFormatsPackage,
+    [Architecture.X64],
+    [SystemType.Linux],
+    [FileFormat.RedHatPackage],
+  );
+  expect(result).toHaveLength(1);
+  expect(result[0].url).toContain('.deb');
+});