Internal: python rpc server log stdout and stderr to file

src/client/client-constants.ts

@@ -1,3 +1,5 @@
+import { app } from "electron";
+import * as mkdirp from "mkdirp";
 import * as net from "net";
 import * as path from "path";
 /**
@@ -43,6 +45,8 @@ const urls = {
 };
 
 const isAsar = process.mainModule.filename.indexOf("app.asar") !== -1;
+const logsFolder = isAsar ? path.join(app.getPath("userData"), "logs") : path.join(root, "logs");
+mkdirp.sync(logsFolder);
 
 const pythonServerPort = {
     dev: Promise.resolve(8765),
@@ -54,6 +58,7 @@ export const Constants = {
     isAsar,
     root,
     urls,
+    logsFolder,
     pythonServerPort,
     version: packageConfig.version,
 };

src/client/logger/logger-proxy.ts

@@ -1,14 +1,10 @@
 import * as bunyan from "bunyan";
-import { app } from "electron";
-import * as mkdirp from "mkdirp";
 import * as path from "path";
 
 import { Constants } from "../client-constants";
 import { PrettyStream } from "./pretty-stream";
 
-const logsFolder = Constants.isAsar ? path.join(app.getPath("userData"), "logs") : path.join(Constants.root, "logs");
-
-mkdirp.sync(logsFolder);
+const logsFolder = Constants.logsFolder;
 
 const stream = new PrettyStream();
 stream.pipe(process.stderr);
@@ -29,6 +25,22 @@ export const logger = bunyan.createLogger({
     ],
 });
 
+export const pythonLogger = bunyan.createLogger({
+    name: "BatchLabs Python",
+    level: "debug",
+    streams: [
+        {
+            stream: stream as any,
+        },
+        {
+            type: "rotating-file",
+            path: path.join(logsFolder, "python-server.log"),
+            period: "1d",       // daily rotation
+            count: 3,           // keep 3 back copies
+        },
+    ],
+});
+
 export const renderLogger = bunyan.createLogger({
     name: "BatchLabs Renderer",
     level: "debug",

src/client/python-process/python-rpc-server-process.ts

@@ -1,13 +1,15 @@
 import { ChildProcess, spawn } from "child_process";
+import * as fs from "fs";
 import * as net from "net";
 import * as path from "path";
 
 import { Constants } from "../client-constants";
-import { logger } from "../logger";
+import { logger, pythonLogger } from "../logger";
 import { getPythonPath } from "./python-executable";
 
 const asarPath = path.join(Constants.root, "../python-rpc/main");
 const localPath = path.join(Constants.root, "python/main.py");
+const logsFolder = Constants.logsFolder;
 
 export class PythonRpcServerProcess {
     private _spawedProcess: ChildProcess;
@@ -21,6 +23,16 @@ export class PythonRpcServerProcess {
         return this._getCommandLine().then((data) => {
             logger.info("Python path is", data.cmd, { args: data.args });
             const child = this._spawedProcess = spawn(data.cmd, [...data.args]);
+            pythonLogger.info("========================= STARTING PYTHON RPC SERVER PROCESS =========================");
+
+            child.stdout.on("data", (data) => {
+                pythonLogger.info(data);
+            });
+
+            child.stderr.on("data", (data) => {
+                pythonLogger.error(data);
+            });
+
             child.on("exit", (code) => {
                 if (this._askForKill) {
                     logger.info("Python rpc server has stopped!");