File paths and platform independence

[wlandau]

In target_is_file() (parse_command.R line 240), I think

is_file <- grepl("/", x, fixed=TRUE)

should probably be replaced by

is_file <- grepl(.Platform$file.sep, x, fixed=TRUE)

to ensure platform independence. I have not checked for more occurrences of "/".

[richfitz]

I'm not totally sure about that; "/" in a path works on both windows and OSX/Linux but "" works only on Windows; so a project that has "" in it will never work cleanly on a non-Windows system.

But on the other hand I can see your point...

[wlandau]

My mistake, I had not actually tested this on Windows.