Temporary files are not cleaned up

[per1234]

Describe the problem

Arduino Firmware Uploader creates some temporary folders:

• Name format: 55770067919477794103602099745
• Name: fwuploader

These persist even after the process completes.

The class of folder first on that list accumulates over time, which may eventually cause a performance impact.

To reproduce

1. Take note of the contents of your temporary folder.
   • Windows:

     C:\Users\<user name>\AppData\Local\Temp
     

   • Linux:

     /tmp
     

   • macOS

     $TMPDIR
     

2. Run the following command:

   arduino-fwuploader firmware list
   

3. Examine the contents of your temporary folder.

🐛 An additional 55770067919477794103602099745 folder is present.
🐛 The fwuploader folder is still present.

Expected behavior

Temporary files are cleaned up on exit.

Arduino Language Server version

2b1ab09

Operating system

• Windows
• Linux
• macOS

Operating system version

• Windows 11
• Ubuntu 22.04
• macOS Ventura

Additional context

Some operating systems may eventually do a clean-up on the temporary folder, but this is not guaranteed. It is better for the application to take care of clean up of any temporary files once they are no longer needed.

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Additional reports:

• https://forum.arduino.cc/t/cleanup-of-tmp-seems-inop-kubuntu-20-04/1072075
• https://forum.arduino.cc/t/windows-10-ide-2-0-2-slow-start/1061136/4
• https://forum.arduino.cc/t/rc9-2-temporary-directories/1022812
• https://forum.arduino.cc/t/temporary-files-from-the-arduino-ide/1067309

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Related:

• Collect all temporary files in a temporary directory arduino-ide#1779

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest version
• My report contains all necessary details