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use crate::{remote, Remote};
use git_refspec::RefSpec;

/// Access
impl Remote<'_> {
    /// Return the name of this remote or `None` if it wasn't persisted to disk yet.
    pub fn name(&self) -> Option<&str> {
        self.name.as_deref()
    }

    /// Return the set of ref-specs used for `direction`, which may be empty, in order of occurrence in the configuration.
    pub fn refspecs(&self, direction: remote::Direction) -> &[RefSpec] {
        match direction {
            remote::Direction::Fetch => &self.fetch_specs,
            remote::Direction::Push => &self.push_specs,
        }
    }

    /// Return the url used for the given `direction` with rewrites from `url.<base>.insteadOf|pushInsteadOf`, unless the instance
    /// was created with one of the `_without_url_rewrite()` methods.
    /// For pushing, this is the `remote.<name>.pushUrl` or the `remote.<name>.url` used for fetching, and for fetching it's
    /// the `remote.<name>.url`.
    /// Note that it's possible to only have the push url set, in which case there will be no way to fetch from the remote as
    /// the push-url isn't used for that.
    pub fn url(&self, direction: remote::Direction) -> Option<&git_url::Url> {
        match direction {
            remote::Direction::Fetch => self.url_alias.as_ref().or(self.url.as_ref()),
            remote::Direction::Push => self
                .push_url_alias
                .as_ref()
                .or(self.push_url.as_ref())
                .or_else(|| self.url(remote::Direction::Fetch)),
        }
    }
}

/// Modification
impl Remote<'_> {
    /// Read `url.<base>.insteadOf|pushInsteadOf` configuration variables and apply them to our urls, changing them in place.
    ///
    /// This happens only once, and one if them may be changed even when reporting an error.
    /// If both urls fail, only the first error (for fetch urls) is reported.
    pub fn rewrite_urls(&mut self) -> Result<&mut Self, remote::init::Error> {
        let url_err = match remote::init::rewrite_url(&self.repo.config, self.url.as_ref(), remote::Direction::Fetch) {
            Ok(url) => {
                self.url_alias = url;
                None
            }
            Err(err) => err.into(),
        };
        let push_url_err =
            match remote::init::rewrite_url(&self.repo.config, self.push_url.as_ref(), remote::Direction::Push) {
                Ok(url) => {
                    self.push_url_alias = url;
                    None
                }
                Err(err) => err.into(),
            };
        url_err.or(push_url_err).map(Err::<&mut Self, _>).transpose()?;
        Ok(self)
    }
}