mod _ref {    use crate::{signature::decode, Signature, SignatureRef};    use bstr::ByteSlice;     impl<'a> SignatureRef<'a> {        /// Deserialize a signature from the given `data`.        pub fn from_bytes<E>(data: &'a [u8]) -> Result<SignatureRef<'a>, nom::Err<E>>        where            E: nom::error::ParseError<&'a [u8]> + nom::error::ContextError<&'a [u8]>,        {            decode(data).map(|(_, t)| t)        }         /// Create an owned instance from this shared one.        pub fn to_owned(&self) -> Signature {            Signature {                name: self.name.to_owned(),                email: self.email.to_owned(),                time: self.time,            }        }         /// Trim whitespace surrounding the name and email and return a new signature.        pub fn trim(&self) -> SignatureRef<'a> {            SignatureRef {                name: self.name.trim().as_bstr(),                email: self.email.trim().as_bstr(),                time: self.time,            }        }    }} mod convert {    use crate::{Signature, SignatureRef};     impl Signature {        /// An empty signature, similar to 'null'.        pub fn empty() -> Self {            Signature::default()        }         /// Borrow this instance as immutable        pub fn to_ref(&self) -> SignatureRef<'_> {            SignatureRef {                name: self.name.as_ref(),                email: self.email.as_ref(),                time: self.time,            }        }    }     impl From<SignatureRef<'_>> for Signature {        fn from(other: SignatureRef<'_>) -> Signature {            let SignatureRef { name, email, time } = other;            Signature {                name: name.to_owned(),                email: email.to_owned(),                time,            }        }    }} mod write {    use std::io;     use bstr::{BStr, ByteSlice};    use quick_error::quick_error;     use crate::{Signature, SignatureRef, SPACE};     quick_error! {        /// The Error produced by [`Signature::write_to()`].        #[derive(Debug)]        #[allow(missing_docs)]        enum Error {            IllegalCharacter {                display("Signature name or email must not contain '<', '>' or \\n")            }        }    }     impl From<Error> for io::Error {        fn from(err: Error) -> Self {            io::Error::new(io::ErrorKind::Other, err)        }    }     /// Output    impl Signature {        /// Serialize this instance to `out` in the git serialization format for actors.        pub fn write_to(&self, out: impl io::Write) -> io::Result<()> {            self.to_ref().write_to(out)        }        /// Computes the number of bytes necessary to serialize this signature        pub fn size(&self) -> usize {            self.to_ref().size()        }    }     impl<'a> SignatureRef<'a> {        /// Serialize this instance to `out` in the git serialization format for actors.        pub fn write_to(&self, mut out: impl io::Write) -> io::Result<()> {            out.write_all(validated_token(self.name)?)?;            out.write_all(SPACE)?;            out.write_all(b"<")?;            out.write_all(validated_token(self.email)?)?;            out.write_all(b"> ")?;            self.time.write_to(out)        }        /// Computes the number of bytes necessary to serialize this signature        pub fn size(&self) -> usize {            self.name.len() + 2 /* space <*/ + self.email.len() +  2 /* > space */ + self.time.size()        }    }     fn validated_token(name: &BStr) -> Result<&BStr, Error> {        if name.find_byteset(b"<>\n").is_some() {            return Err(Error::IllegalCharacter);        }        Ok(name)    }} mod init {    use bstr::BString;     use crate::{Signature, Time};     impl Signature {        /// Return an actor identified `name` and `email` at the current local time, that is a time with a timezone offset from        /// UTC based on the hosts configuration.        #[cfg(feature = "local-time-support")]        pub fn now_local(            name: impl Into<BString>,            email: impl Into<BString>,        ) -> Result<Self, git_features::time::tz::Error> {            let offset = git_features::time::tz::current_utc_offset()?;            Ok(Signature {                name: name.into(),                email: email.into(),                time: Time {                    seconds_since_unix_epoch: std::time::SystemTime::now()                        .duration_since(std::time::UNIX_EPOCH)                        .expect("the system time doesn't run backwards that much")                        .as_secs() as u32,                    offset_in_seconds: offset,                    sign: offset.into(),                },            })        }         /// Return an actor identified `name` and `email` at the current local time, or UTC time if the current time zone could        /// not be obtained.        #[cfg(feature = "local-time-support")]        pub fn now_local_or_utc(name: impl Into<BString>, email: impl Into<BString>) -> Self {            let offset = git_features::time::tz::current_utc_offset().unwrap_or(0);            Signature {                name: name.into(),                email: email.into(),                time: Time {                    seconds_since_unix_epoch: std::time::SystemTime::now()                        .duration_since(std::time::UNIX_EPOCH)                        .expect("the system time doesn't run backwards that much")                        .as_secs() as u32,                    offset_in_seconds: offset,                    sign: offset.into(),                },            }        }         /// Return an actor identified by `name` and `email` at the current time in UTC.        ///        /// This would be most useful for bot users, otherwise the [`now_local()`][Signature::now_local()] method should be preferred.        pub fn now_utc(name: impl Into<BString>, email: impl Into<BString>) -> Self {            let utc_offset = 0;            Signature {                name: name.into(),                email: email.into(),                time: Time {                    seconds_since_unix_epoch: seconds_since_unix_epoch(),                    offset_in_seconds: utc_offset,                    sign: utc_offset.into(),                },            }        }    }     fn seconds_since_unix_epoch() -> u32 {        std::time::SystemTime::now()            .duration_since(std::time::UNIX_EPOCH)            .expect("the system time doesn't run backwards that much")            .as_secs() as u32    }} ///mod decode;pub use decode::decode;