file path issues when testing on windows about data.table

[tdhock]

is quoting needed somewhere?

[MichaelChirico]

The key looks like here:

'file:' is not recognized as an internal or external command,
operable program or batch file.

As noted in nearby comments, the test is about simulating download.file() without needing internet access by passing file:// paths.

What does this do on the machine in question?

writeLines(letters, tmp<-tempfile())
download.file(paste0("file://", tmp), tmp2<-tempfile(), method="internal")
readLines(tmp2)

[tdhock]

> writeLines(letters, tmp<-tempfile())
> download.file(paste0("file://", tmp), tmp2<-tempfile(), method="internal")
> readLines(tmp2)
 [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q" "r" "s"
[20] "t" "u" "v" "w" "x" "y" "z"

so I think it has something to do with the fread logic "if there is a space it must be a system command"

[D3SL]

@tdhock that's exactly what it is. Despite the error message referring to v1.11.6 this seems like a very recent change in behavior, I never had this issue before.

This also makes fread incompatible with any map()-like commands without using an anonymous function so you can feed x to file= instead of the default first input.