| file_test | R Documentation |
Utility for shell-style file tests.
file_test(op, x, y)
op |
a character string specifying the test to be performed.
Unary tests (only |
x, y |
character vectors giving file paths. |
‘Existence’ here means being on the file system and accessible
by the stat system call (or a 64-bit extension) – on a
Unix-alike this requires execute permission on all of the directories in
the path that leads to the file, but no permissions on the file
itself.
For the meaning of "-x" on Windows see file.access.
file.exists which only tests for existence
(test -e on some systems) but not for not being a directory.
file.path, file.info
dir <- file.path(R.home(), "library", "stats")
file_test("-d", dir)
file_test("-nt", file.path(dir, "R"), file.path(dir, "demo"))
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