I hit an unexpected errno 30 on macos attempting to call createFile on a
directory in PATH. errno 30 is EROFS, this change propagates that error
as error.ReadOnlyFileSystem.
The logic used to allow providing a path for setting the CWD of a child process in https://codeberg.org/ziglang/zig/pulls/31090 applies here as well:
- Windows must provide a path when setting the CWD, so the path of an `Io.Dir` must be resolved before actually calling RtlSetCurrentDirectory_U
- A directory handle may have multiple paths associated with it, so providing the CWD as a string retains a legitimate use case in cases where the precise path matters
While the general guidance remains useful, it is not the case that
error.Canceled will always pass across the Group task function boundary.
Remove the too-aggressive assertions and add unit test coverage.
Closes#30096Closes#31340Closes#31358
This function works with a slice of futures and returns the index of a
completed one. This doesn't work very well in practice because it's
either too high level or too low level.
At the lower level we have Io.Batch for doing this kind of thing at the
Operation API layer.
At the higher level we have Io.Select which is a convenience wrapper
around an Io.Group and an Io.Queue.
xeondev