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Also add a WCStr type
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If possible, we should try not to use verbatim paths in Command::current_dir. It might work but it might also break code (including some Windows APIs) that assume the current directory isn't verbatim.
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Redox OS is moving away from name:/path style paths to /scheme/name/path
style paths which are already handled correctly without has_redox_scheme.
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UEFI paths can be of 4 types:
1. Absolute Shell Path: Uses shell mappings
2. Absolute Device Path: this is what we want
3: Relative root: path relative to the current root.
4: Relative
Absolute shell path can be identified with `:` and Absolute Device path
can be identified with `/`. Relative root path will start with `\`.
The algorithm is mostly taken from edk2 UEFI shell implementation and is
somewhat simple. Check for the path type in order.
For Absolute Shell path, use `EFI_SHELL->GetDevicePathFromMap` to
get a BorrowedDevicePath for the volume.
For Relative paths, we use the current working directory to construct
the new path.
BorrowedDevicePath abstraction is needed to interact with
`EFI_SHELL->GetDevicePathFromMap` which returns a Device Path Protocol
with the lifetime of UEFI shell.
Absolute Shell paths cannot exist if UEFI shell is missing.
Signed-off-by: Ayush Singh <ayush@beagleboard.org>
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I am working on fs support for UEFI [0], which similar to windows has prefix
components, but is not quite same as Windows. It also seems that Prefix
is tied closely to Windows and cannot really be extended [1].
This PR just tries to remove coupling between Prefix and absolute path
checking to allow platforms to provide there own implementation to check
if a path is absolute or not.
I am not sure if any platform other than windows currently uses Prefix,
so I have kept the path.prefix().is_some() check in most cases.
[0]: https://github.com/rust-lang/rust/pull/135368
[1]: https://github.com/rust-lang/rust/issues/52331#issuecomment-2492796137
Signed-off-by: Ayush Singh <ayush@beagleboard.org>
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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Many tiny changes to stdlib doc comments to make them consistent (for example
"Returns foo", rather than "Return foo", per RFC1574), adding missing periods, paragraph
breaks, backticks for monospace style, and other minor nits.
https://github.com/rust-lang/rfcs/blob/master/text/1574-more-api-documentation-conventions.md#appendix-a-full-conventions-text
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