Additional sketches can't be opened via file association/command line argument

[per1234]

Describe the problem

In addition to opening them via the Arduino IDE GUI, sketches can be opened directly either via file association or by passing their path to the IDE command line invocation.

🐛 This only works once per IDE session. After that, attempting to open additional sketches in this manner has no effect.

To reproduce

1. Select File > Quit from the Arduino IDE menus if it is running.
2. Open a sketch via file association or command line argument:

   & ".\Arduino IDE" "C:\Users\per\Documents\Arduino\Foo"
   

   🙂 The IDE starts up with the specified sketch open, as expected.
3. Open a different sketch via file association or command line argument:

   & ".\Arduino IDE" "C:\Users\per\Documents\Arduino\Bar"
   

🐛 The command exits immediately with no effect. The specified sketch is not opened in an IDE window.

Expected behavior

Additional sketches can be opened via file association or command line argument when the IDE is already running.

Arduino IDE version

2.0.1

Operating system

• Windows
• Linux

Operating system version

• Windows 10
• Ubuntu 20.04

Additional context

I bisected the regression to 2b2463b / #1563

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Originally reported at https://forum.arduino.cc/t/arduino-ide-2-0-1-is-now-available/1046764/7

Issue checklist

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

[kittaakos]

Expected behavior

Additional sketches can be opened via file association or command line argument when the IDE is already running.

Additional context

I bisected the regression to 2b2463b / #1563

It does not work for me with 2.0.0 either. The second window never opens, and the first never opens to the correct sketch. I gave absolute paths to the main sketch file and folder, but neither worked. IDE2 opened a different sketch. This is on macOS with 2.0.0

[kittaakos]

This is on macOS

arduino-ide/arduino-ide-extension/src/electron-main/theia/electron-main-application.ts

Line 359 in f6275f9

!os.isOSX &&

[dalnel]

2.3.5 them same question