Support shell detection in helper mode #704
Merged
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Description
Shell detection in for command completion installation goes through a few hoops to determine the correct shell. If it can't, in this case due to double forking and detaching in the background of the helper if will fail.
Additionally shellingham.posix was not being picked up by the pyinstaller build.
Dump traceback for unhandled errors when running under helper
Related links:
https://github.com/sarugaku/shellingham#notes-for-application-developers
Checklist: