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rappdirs

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rappdirs is a port of appdirs to R. It lets you find the appropriate directory to save caches, logs, and data, on Linux, Mac, and Windows.

Motivation

What directory should your app use for storing user data? If running on Mac OS X, you should use:

~/Library/Application Support/<AppName>

If on Windows (at least English Win XP) that should be:

C:\Documents and Settings\<User>\Application Data\Local Settings\<AppAuthor>\<AppName>

or possibly:

C:\Documents and Settings\<User>\Application Data\<AppAuthor>\<AppName>

for roaming profiles but that is another story.

On Linux (and other Unices) the dir, according to the XDG spec (and subject to some interpretation), is either:

~/.config/<AppName>     

or possibly:

~/.local/share/<AppName>

Installation

Stable version:

install.packages("rappdirs")

Development version:

pak::pak("r-lib/rappdirs")

Usage

This kind of thing is what rappdirs is for. rappdirs will help you choose an appropriate:

For example, on Mac:

library(rappdirs)
appname <- "SuperApp"
appauthor <- "Acme"
user_config_dir(appname, appauthor)
#> [1] "~/Library/Application Support/SuperApp"
user_data_dir(appname, appauthor)
#> [1] "~/Library/Application Support/SuperApp"
site_data_dir(appname, appauthor)
#> [1] "/Library/Application Support/SuperApp"
user_cache_dir(appname, appauthor)
#> [1] "~/Library/Caches/SuperApp"
user_log_dir(appname, appauthor)
#> [1] "~/Library/Logs/SuperApp"