add modules to electron export, fix issues when downloading updates

electron/hwidUtil.js

@@ -0,0 +1,32 @@
+const child_process = require("child_process");
+const options = { encoding: "ascii", windowsHide: true, timeout: 200 };
+const platforms = {
+  win32: [
+    "REG QUERY HKLM\\SOFTWARE\\Microsoft\\Cryptography /v MachineGuid",
+    /MachineGuid\s+REG_SZ\s+(.*?)\s/,
+  ],
+  darwin: [
+    "ioreg -rd1 -c IOPlatformExpertDevice",
+    /"IOPlatformUUID" = "(.*?)"/,
+  ],
+  linux: [
+    "cat /var/lib/dbus/machine-id /etc/machine-id 2> /dev/null || true",
+    /^([\da-f]+)/,
+  ],
+};
+const crypto = require("crypto");
+
+/**
+ * Returns machine hardware id.
+ * Returns `undefined` if cannot determine.
+ * @return {string?}
+ */
+function getHwId() {
+  const getter = platforms[process.platform];
+  if (!getter) return;
+  const result = getter[1].exec(child_process.execSync(getter[0], options));
+  if (!result) return;
+  return crypto.createHash("md5").update(result[1]).digest("hex") ||
+    undefined;
+}
+exports.getHwId = getHwId;