Harden extraction verification, cleanup safety, and logging in v1.3.10

src/main/logger.ts

@@ -2,18 +2,46 @@ import fs from "node:fs";
 import path from "node:path";
 
 let logFilePath = path.resolve(process.cwd(), "rd_downloader.log");
+let fallbackLogFilePath: string | null = null;
 
 export function configureLogger(baseDir: string): void {
   logFilePath = path.join(baseDir, "rd_downloader.log");
+  const cwdLogPath = path.resolve(process.cwd(), "rd_downloader.log");
+  fallbackLogFilePath = cwdLogPath === logFilePath ? null : cwdLogPath;
+}
+
+function appendLine(filePath: string, line: string): { ok: boolean; errorText: string } {
+  try {
+    fs.mkdirSync(path.dirname(filePath), { recursive: true });
+    fs.appendFileSync(filePath, line, "utf8");
+    return { ok: true, errorText: "" };
+  } catch (error) {
+    return { ok: false, errorText: String(error) };
+  }
 }
 
 function write(level: "INFO" | "WARN" | "ERROR", message: string): void {
   const line = `${new Date().toISOString()} [${level}] ${message}\n`;
-  try {
-    fs.mkdirSync(path.dirname(logFilePath), { recursive: true });
-    fs.appendFileSync(logFilePath, line, "utf8");
-  } catch {
-    // ignore logging failures
+  const primary = appendLine(logFilePath, line);
+
+  if (fallbackLogFilePath) {
+    const fallback = appendLine(fallbackLogFilePath, line);
+    if (!primary.ok && !fallback.ok) {
+      try {
+        process.stderr.write(`LOGGER write failed (primary+fallback): ${primary.errorText} | ${fallback.errorText}\n`);
+      } catch {
+        // ignore stderr failures
+      }
+    }
+    return;
+  }
+
+  if (!primary.ok) {
+    try {
+      process.stderr.write(`LOGGER write failed: ${primary.errorText}\n`);
+    } catch {
+      // ignore stderr failures
+    }
   }
 }