Describe the bug

I have a script developed in python that may output a large amount of content.

It works normally on Xbar. When I switch to SwiftBar, I find that the program always displays three points as placeholders at startup.

When I check the process(ps -ef | grep *.py), I found that the script was running, but when I use run in Terminal..., it quickly produce output.

By manually interrupting the script, I get an error message on the status bar. The content of the message is what I originally wanted to output, but it is only 64KB long.

To Reproduce

Run any script that produces more than 64KB of content.

Expected behavior

Output longer content

Screenshots

Environment:

• macOS version: 12.3
• SwiftBar version: 1.4.3 (422)

Plugin Example:

#!/usr/bin/env /usr/bin/python3

# every menu item got 1KB size
LARGE_DATA = "*"*(1024-len("content 00 | extra="))

print("Long Content")
print("---")
# after changing 64 to 63, the problem disappears
for i in range(64):
    print(f"content {i:0>2} | extra={LARGE_DATA}")

Additional Context:

• I don't run Bartender/Dozer/etc. or tested the issue without it running

I guess the problem is that the default buffer size is only 64KB. When the output content is too large, the program will get stuck at line 82, so I adjusted the above code(line 82 to 85) to:

  
             outputData = outputPipe.fileHandleForReading.readDataToEndOfFile() 
             errorData = errorPipe.fileHandleForReading.readDataToEndOfFile() 

             waitUntilExit() 

Then the program can run normally.

Ralated issue: #294