surma
4b27e9afd5
Local workflow, smart-HTTP clone/fetch/push and public HTTPS clone/fetch match native git in stdout and exit codes. Only WASI imports (wasi:http, exit-with-code).
55 lines
2.0 KiB
Rust
55 lines
2.0 KiB
Rust
use gix_error::Result;
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use std::{path::Path, sync::atomic::AtomicBool};
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use gix_error::{Class, ClassificationMarker, ResultExt, bail};
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use gix_utils::progress::Progress;
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/// Returns the `index` at which the following `index + 1` value is not an increment over the value at `index`.
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pub fn fan(data: &[u32]) -> Option<usize> {
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data.windows(2)
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.enumerate()
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.find_map(|(win_index, v)| (v[0] > v[1]).then_some(win_index))
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}
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/// Calculate the hash of the given kind by trying to read the file from disk at `data_path` or falling back on the mapped content in `data`.
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/// `Ok(expected)` is returned if the hash matches, otherwise the error is classified as corruption.
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pub fn checksum_on_disk_or_mmap(
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data_path: &Path,
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data: &[u8],
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expected: gix_hash::ObjectId,
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object_hash: gix_hash::Kind,
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progress: &mut dyn Progress,
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should_interrupt: &AtomicBool,
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) -> Result<gix_hash::ObjectId> {
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let data_len_without_trailer = data.len() - object_hash.len_in_bytes();
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let actual = match gix_hash::bytes_of_file(
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data_path,
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data_len_without_trailer as u64,
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object_hash,
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progress,
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should_interrupt,
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) {
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Ok(id) => id,
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Err(err) if err.is_cancelled() => return Err(err),
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Err(err) => match err.downcast_any_ref::<std::io::Error>().map(std::io::Error::kind) {
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Some(std::io::ErrorKind::Interrupted) => {
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bail!(ClassificationMarker::with_source(Class::Retryable, err));
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}
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Some(_) => {
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let start = std::time::Instant::now();
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let mut hasher = gix_hash::hasher(object_hash);
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hasher.update(&data[..data_len_without_trailer]);
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progress.inc_by(data_len_without_trailer);
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progress.show_throughput(start);
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hasher.try_finalize()?
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}
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None => return Err(err),
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},
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};
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actual
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.verify(&expected)
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.or_raise(|| gix_error::corruption("Failed to verify pack file checksum"))?;
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Ok(actual)
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}
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