[R-pkg-devel] Writing to users config directory for CRAN package

[David Hugh-Jones]

Hi,

I'm considering submitting the package onetime (
https://github.com/hughjonesd/onetime/) to CRAN.

Onetime has functions for showing a message or warning only once (ever per
user). It does this by writing to a file in the user's configuration
directory, as reported by rappdirs::user_config_dir().

I know that CRAN has rules about not writing to the user's file system
without permission. What would be an appropriate way to do this? For
example, the function onetime_message_confirm() prints a message and then
asks "Show this again?[yN]" Would a "no" count as permission to write the
file?

Cheers,
David

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