use gix_ref::{Category, FullName}; use crate::{    Reference,    bstr::{BStr, ByteSlice},    remote,    repository::{branch_remote_ref_name, branch_remote_tracking_ref_name},}; /// Remotesimpl<'repo> Reference<'repo> {    /// Find the name of our remote for `direction` as configured in `branch.<name>.remote|pushRemote` respectively.    /// Return `None` if no remote is configured.    ///    /// See also [`Repository::branch_remote_name()`](crate::Repository::branch_remote_name()) for more details.    pub fn remote_name(&self, direction: remote::Direction) -> Option<remote::Name<'_>> {        let (category, shortname) = self.name().category_and_short_name()?;        match category {            Category::RemoteBranch => {                let mut remotes = None;                remote_name_from_tracking_branch(shortname, |candidate| {                    remotes                        .get_or_insert_with(|| self.repo.remote_names())                        .contains(candidate)                })                .and_then(|name| name.to_str().ok())                .map(|name| remote::Name::Symbol(name.into()))            }            Category::LocalBranch => self.repo.branch_remote_name(shortname, direction),            _ => None,        }    }     /// Find the remote along with all configuration associated with it suitable for handling this reference.    ///    /// See also [`Repository::branch_remote()`](crate::Repository::branch_remote()) for more details.    pub fn remote(        &self,        direction: remote::Direction,    ) -> Option<Result<crate::Remote<'repo>, remote::find::existing::Error>> {        self.repo.branch_remote(self.name().shorten(), direction)    }     /// Return the name of this reference on the remote side.    ///    /// See [`Repository::branch_remote_ref_name()`](crate::Repository::branch_remote_ref_name()) for details.    #[doc(alias = "upstream", alias = "git2")]    pub fn remote_ref_name(        &self,        direction: remote::Direction,    ) -> Option<Result<FullName, branch_remote_ref_name::Error>> {        self.repo.branch_remote_ref_name(self.name(), direction)    }     /// Return the name of the reference that tracks this reference on the remote side.    ///    /// See [`Repository::branch_remote_tracking_ref_name()`](crate::Repository::branch_remote_tracking_ref_name()) for details.    #[doc(alias = "upstream", alias = "git2")]    pub fn remote_tracking_ref_name(        &self,        direction: remote::Direction,    ) -> Option<Result<FullName, branch_remote_tracking_ref_name::Error>> {        self.repo.branch_remote_tracking_ref_name(self.name(), direction)    }} /// Infer the remote name from a remote-tracking branch name without its `refs/remotes/` prefix.////// A name with exactly one slash, like `origin/main`, is unambiguous and yields `origin` even if that remote is not/// configured. With multiple slashes, both remote and branch names may contain slashes, so configured remote names are/// considered from longest to shortest: for `team/origin/topic`, `team/origin` wins over `team` when both exist./// A name without a slash, or a multi-slash name without a matching configured remote prefix, yields `None`./// `is_configured_remote` is only called for multi-slash names, for which configuration is needed to disambiguate.pub(crate) fn remote_name_from_tracking_branch(    shortname: &BStr,    mut is_configured_remote: impl FnMut(&BStr) -> bool,) -> Option<&BStr> {    if shortname.find_iter("/").take(2).count() == 1 {        let slash_pos = shortname.find_byte(b'/').expect("it was just found");        return Some(shortname[..slash_pos].as_bstr());    }    shortname        .rfind_iter("/")        .map(|slash_pos| shortname[..slash_pos].as_bstr())        .find(|candidate| is_configured_remote(candidate))}