Check whether file(s) exist

checkFile checks whether file exists, assertFile stops the program if files do not exist

Usage

checkFile(...)

assertFile(...)

Arguments

...

Files to be checked

Value

checkFile returns logical vector. assertFile returns an invisible TRUE if files exist, otherwise halts and prints error messages.

Details

assertFile is often used in scripts where missing a file would cause the script fail.

See also

isDir and assertDir

Author

Jitao David Zhang <jitao_david.zhang@roche.com>

Examples

myDesc <- system.file("DESCRIPTION", package="ribiosUtils")
myNEWS <- system.file("NEWS", package="ribiosUtils")
checkFile(myDesc, myNEWS)
#> [1] TRUE
assertFile(myDesc, myNEWS)