use quick_error::quick_error;use std::fmt; /// The four types of objects that git differentiates.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]#[allow(missing_docs)]pub enum Kind {    Tree,    Blob,    Commit,    Tag,}quick_error! {    /// The Error used in [`Kind::from_bytes()`].    #[derive(Debug, Clone)]    #[allow(missing_docs)]    pub enum Error {        InvalidObjectKind(kind: crate::BString) {            display("Unknown object kind: {:?}", std::str::from_utf8(kind))        }    }} impl Kind {    /// Parse a `Kind` from its serialized loose git objects.    pub fn from_bytes(s: &[u8]) -> Result<Kind, Error> {        Ok(match s {            b"tree" => Kind::Tree,            b"blob" => Kind::Blob,            b"commit" => Kind::Commit,            b"tag" => Kind::Tag,            _ => return Err(Error::InvalidObjectKind(s.into())),        })    }     /// Return the name of `self` for use in serialized loose git objects.    pub fn as_bytes(&self) -> &[u8] {        match self {            Kind::Tree => b"tree",            Kind::Commit => b"commit",            Kind::Blob => b"blob",            Kind::Tag => b"tag",        }    }} impl fmt::Display for Kind {    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {        f.write_str(std::str::from_utf8(self.as_bytes()).expect("Converting Kind name to utf8"))    }} ///pub mod tree {    /// The mode of items storable in a tree, similar to the file mode on a unix file system.    ///    /// Used in [mutable::Entry][crate::mutable::tree::Entry] and [immutable::Entry][crate::immutable::tree::Entry].    #[derive(Clone, Copy, PartialEq, Eq, Debug, Ord, PartialOrd, Hash)]    #[repr(u16)]    #[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]    #[allow(missing_docs)]    pub enum EntryMode {        Tree = 0o040000u16,        Blob = 0o100644,        BlobExecutable = 0o100755,        Link = 0o120000,        Commit = 0o160000,    }     impl EntryMode {        /// Return true if this entry mode represents a Tree/directory        pub fn is_tree(&self) -> bool {            *self == EntryMode::Tree        }         /// Return true if this entry mode represents anything BUT Tree/directory        pub fn is_no_tree(&self) -> bool {            *self != EntryMode::Tree        }    }}