b0655f90

By: Tom Sydney Kerckhove <syd@cs-syd.eu>

Let a scenario carry whether it is a file or a directory

scenarioDir, scenarioDirRecur and scenarioDirOfDirs took a FilePath and handed
the callback a FilePath, so the one thing the caller had to know about a
scenario, whether it was a file or a directory, was the one thing the type
would not tell them. scenarioDirOfDirs handing out a directory and scenarioDir
handing out a file had the same signature.

They now take a Path b Dir and hand over a Path b File or a Path b Dir. The base
is the one the directory was given with, so a relative directory still names its
scenarios relative to the working directory, and running scenarios over a
withSystemTempDir still works with the absolute path it gives.

Test descriptions are unchanged, separator and all, so a --filter over them
still selects the same tests.

sydtest-test no longer depends on filepath: joining a scenario directory to a
file in it was the only thing it wanted System.FilePath for, and Path's own </>
does that with the types lined up.

Timeline