use std::sync::atomic::AtomicBool; use git_features::progress::Progress; use crate::data::File; ///pub mod checksum {    /// Returned by [`data::File::verify_checksum()`][crate::data::File::verify_checksum()].    pub type Error = crate::verify::checksum::Error;} /// Checksums and verify checksumsimpl File {    /// The checksum in the trailer of this pack data file    pub fn checksum(&self) -> git_hash::ObjectId {        git_hash::ObjectId::from(&self.data[self.data.len() - self.hash_len..])    }     /// Verifies that the checksum of the packfile over all bytes preceding it indeed matches the actual checksum,    /// returning the actual checksum equivalent to the return value of [`checksum()`][File::checksum()] if there    /// is no mismatch.    ///    /// Note that if no `progress` is desired, one can pass [`git_features::progress::Discard`].    ///    /// Have a look at [`index::File::verify_integrity(…)`][crate::index::File::verify_integrity()] for an    /// even more thorough integrity check.    pub fn verify_checksum(        &self,        progress: impl Progress,        should_interrupt: &AtomicBool,    ) -> Result<git_hash::ObjectId, checksum::Error> {        crate::verify::checksum_on_disk_or_mmap(            self.path(),            &self.data,            self.checksum(),            self.object_hash,            progress,            should_interrupt,        )    }}