Starting IDE creates "undefined" folder in current directory

[JayPi4c]

Describe the bug
It is more an oddity than a bug.
Whenever I start the IDE the program creates a folder called "undefined" in my home directory. This folder contains only one folder called "Arduino IDE" which contains logs of the IDE. I think it's good that the logs are saved in an easy to find location. But all the time I'm looking into my home-folder the "undefined" folder kind of confuses me.

To Reproduce
Steps to reproduce the behavior:

1. Start the IDE
2. go to home folder
3. be happy with "undefined" folder

Expected behavior
Just giving it a more precise name would make me happy.

Screenshots

Desktop (please complete the following information):

• OS: Linux Ubuntu 20.04.2 LTS
• Version: 2.0.0-beta.7

Additional context
As already mentioned in #110 it is not perfectly documented how to install the IDE correctly, so i guess it could also be an error of me in the installation process. In my point of view I went a straight forward way, downloading the newest IDE, unzipping the contents and copying the files to /opt/
To have it listed in the applications menu of Ubuntu I created the file Arduino 2.0 (beta).desktop in ~/.local/share/applications with the following content:

[Desktop Entry]
Type=Application
# desktop entry spec version
Version=6.4.2
Name=Arduino 2.0 (beta)
Comment=Arduino IDE 2.0 beta
Exec=/opt/arduino-ide_2.0.0-beta.07/arduino-ide
Icon=/opt/arduino-1.8.13/lib/arduino.png
MimeType=image/svg+xml;
Terminal=false
Categories=Development
X-Desktop-File-Install-Version=0.24

It is mostly a copy of another .desktop file in the directory.

Now starting the IDE results in generating the undefined-folder. Everything else works perfectly.

[ralphtheninja]

FWIW, I noticed this bug as well and did some digging. I think this is actually a bug inside Theia. But there's just too much typescript interface over engineered junk in the way and I could not find where a simple directory is created.

Another observation I made is that the undefined folder is created in the folder where you're starting the ide from, so if that's ~/arduino, then the ~/arduino/undefined folder will be created.

[ggl]

I found it. It's here:

resources/app/node_modules/node-log-rotate/lib/utils/find-log-file-name.js

The module seems to be initialized here.

The default_1 function returns this log file name, with an obviously undefined path. It annoyed me to a great extent so I commented the return line and it doesn't do it any more.