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[red-knot]: Add a VendoredFileSystem implementation (#11863)

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Co-authored-by: Micha Reiser <micha@reiser.io>
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Alex Waygood 2024-06-18 16:43:39 +01:00 • committed by GitHub
parent f666d79cd7
commit 1d73d60bd3
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10 changed files with 582 additions and 172 deletions
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72
crates/ruff_db/src/file_system.rs
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@ -3,8 +3,8 @@ use std::ops::Deref;
use std::path::{Path, StripPrefixError};
use camino::{Utf8Path, Utf8PathBuf};
use filetime::FileTime;
use crate::file_revision::FileRevision;
pub use memory::MemoryFileSystem;
pub use os::OsFileSystem;
@ -514,55 +514,6 @@ impl Metadata {
}
}
/// A number representing the revision of a file.
///
/// Two revisions that don't compare equal signify that the file has been modified.
/// Revisions aren't guaranteed to be monotonically increasing or in any specific order.
///
/// Possible revisions are:
/// * The last modification time of the file.
/// * The hash of the file's content.
/// * The revision as it comes from an external system, for example the LSP.
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub struct FileRevision(u128);
impl FileRevision {
pub fn new(value: u128) -> Self {
Self(value)
}
pub const fn zero() -> Self {
Self(0)
}
#[must_use]
pub fn as_u128(self) -> u128 {
self.0
}
}
impl From<u128> for FileRevision {
fn from(value: u128) -> Self {
FileRevision(value)
}
}
impl From<u64> for FileRevision {
fn from(value: u64) -> Self {
FileRevision(u128::from(value))
}
}
impl From<FileTime> for FileRevision {
fn from(value: FileTime) -> Self {
let seconds = value.seconds() as u128;
let seconds = seconds << 64;
let nanos = u128::from(value.nanoseconds());
FileRevision(seconds | nanos)
}
}
#[derive(Copy, Clone, Eq, PartialEq, Debug, Hash)]
pub enum FileType {
File,
@ -583,24 +534,3 @@ impl FileType {
matches!(self, FileType::Symlink)
}
}
#[cfg(test)]
mod tests {
use filetime::FileTime;
use crate::file_system::FileRevision;
#[test]
fn revision_from_file_time() {
let file_time = FileTime::now();
let revision = FileRevision::from(file_time);
let revision = revision.as_u128();
let nano = revision & 0xFFFF_FFFF_FFFF_FFFF;
let seconds = revision >> 64;
assert_eq!(file_time.nanoseconds(), nano as u32);
assert_eq!(file_time.seconds(), seconds as i64);
}
}