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Base path of package (with DESCRIPTION file), per default at current getwd. Derived from devtools::package_file
packagePath(path = ".", file = NULL, warnonly = FALSE)
Path character string
Path to (or below) package directory. DEFAULT: "."
Optional file name to be added to path. DEFAULT: NA
Logical: if no part of the path is a package, give a warning and return the original input instead of stopping with an error. DEFAULT: FALSE
Berry Boessenkool, berry-b@gmx.de, Sep 2017
getwd
# packagePath() # may fail on cran checks
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