fix: disable downloads of Electron 44+ on 32-bit Windows and ARM Linux

src/renderer/utils/disable-download.ts

@@ -1,20 +1,33 @@
 import semver from 'semver';
 
+const lastIa32AndArmv7lVersion = '44.0.0-alpha.3';
+
+/**
+ * Rules for Electron versions that have no build for a platform and
+ * architecture. Combinations without a rule can download any version.
+ */
+const unavailableVersions: Partial<
+  Record<string, (version: string) => boolean>
+> = {
+  // Apple Silicon builds start with 11.0.0.
+  // Reference: {@link https://www.electronjs.org/blog/apple-silicon}
+  'darwin-arm64': (version) => semver.lt(version, '11.0.0'),
+  // Windows arm64 builds start with 6.0.8.
+  'win32-arm64': (version) => !semver.satisfies(version, '>=6.0.8 || >=7.0.0'),
+  // Windows ia32 and Linux armv7l builds are no longer published after
+  // 44.0.0-alpha.3.
+  // Reference: {@link https://github.com/electron/electron/blob/main/docs/breaking-changes.md#removed-windows-32-bit-ia32-and-linux-32-bit-arm-armv7l-support}
+  'win32-ia32': (version) => semver.gt(version, lastIa32AndArmv7lVersion),
+  'linux-arm': (version) => semver.gt(version, lastIa32AndArmv7lVersion),
+};
+
 /**
- * disables download button for versions:
- * - below 11.0.0 on Apple Silicon.
- * - below 6.0.8 and 7.0.0 on Windows arm64
- * Reference: {@link https://www.electronjs.org/blog/apple-silicon}
+ * Whether the download button is disabled for an Electron version, because
+ * no build of it exists for the current platform and architecture.
  *
  * @param version - electron version
  */
 export function disableDownload(version: string): boolean {
-  return (
-    (window.ElectronFiddle.platform === 'darwin' &&
-      window.ElectronFiddle.arch === 'arm64' &&
-      semver.lt(version, '11.0.0')) ||
-    (window.ElectronFiddle.platform === 'win32' &&
-      window.ElectronFiddle.arch === 'arm64' &&
-      !semver.satisfies(version, '>=6.0.8 || >=7.0.0'))
-  );
+  const { platform, arch } = window.ElectronFiddle;
+  return unavailableVersions[`${platform}-${arch}`]?.(version) ?? false;
 }

tests/renderer/utils/disable-download.spec.ts

@@ -34,6 +34,28 @@ describe('disableDownload', () => {
     expect(disableDownload('8.0.0')).toBe(false);
   });
 
+  it('returns true for Electron 44 and higher on 32-bit Windows', () => {
+    overrideRendererPlatform('win32');
+    overrideRendererArch('ia32');
+
+    expect(disableDownload('43.0.0')).toBe(false);
+    expect(disableDownload('44.0.0-alpha.3')).toBe(false);
+    expect(disableDownload('44.0.0-alpha.4')).toBe(true);
+    expect(disableDownload('44.0.0')).toBe(true);
+    expect(disableDownload('44.5.1')).toBe(true);
+    expect(disableDownload('46.0.0-nightly.20261021')).toBe(true);
+  });
+
+  it('returns true for Electron 44 and higher on 32-bit ARM Linux', () => {
+    overrideRendererPlatform('linux');
+    overrideRendererArch('arm');
+
+    expect(disableDownload('43.0.0')).toBe(false);
+    expect(disableDownload('44.0.0-alpha.3')).toBe(false);
+    expect(disableDownload('44.0.0-alpha.4')).toBe(true);
+    expect(disableDownload('44.5.1')).toBe(true);
+  });
+
   it('always return false when the system is linux', () => {
     overrideRendererPlatform('linux');