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mod error {
use crate::handshake::refs::parse;
/// The error returned by [ls_refs()][crate::ls_refs()].
#[derive(Debug, thiserror::Error)]
#[allow(missing_docs)]
pub enum Error {
#[error(transparent)]
Io(#[from] std::io::Error),
#[error(transparent)]
Transport(#[from] gix_transport::client::Error),
#[error(transparent)]
Parse(#[from] parse::Error),
}
impl gix_transport::IsSpuriousError for Error {
fn is_spurious(&self) -> bool {
match self {
Error::Io(err) => err.is_spurious(),
Error::Transport(err) => err.is_spurious(),
_ => false,
}
}
}
}
pub use error::Error;
/// What to do after preparing ls-refs in [ls_refs()][crate::ls_refs()].
#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]
pub enum Action {
/// Continue by sending a 'ls-refs' command.
Continue,
/// Skip 'ls-refs' entirely.
///
/// This is useful if the `ref-in-want` capability is taken advantage of. When fetching, one must must then send
/// `want-ref`s during the negotiation phase.
Skip,
}
pub(crate) mod function {
use std::borrow::Cow;
use bstr::BString;
use gix_features::progress::Progress;
use gix_transport::client::{Capabilities, Transport, TransportV2Ext};
use maybe_async::maybe_async;
use super::{Action, Error};
use crate::{
handshake::{refs::from_v2_refs, Ref},
indicate_end_of_interaction, Command,
};
/// Invoke an ls-refs V2 command on `transport`, which requires a prior handshake that yielded
/// server `capabilities`. `prepare_ls_refs(capabilities, arguments, features)` can be used to alter the _ls-refs_. `progress` is used to provide feedback.
/// Note that `prepare_ls_refs()` is expected to add the `(agent, Some(name))` to the list of `features`.
#[maybe_async]
pub async fn ls_refs(
mut transport: impl Transport,
capabilities: &Capabilities,
prepare_ls_refs: impl FnOnce(
&Capabilities,
&mut Vec<BString>,
&mut Vec<(&str, Option<Cow<'static, str>>)>,
) -> std::io::Result<Action>,
progress: &mut impl Progress,
) -> Result<Vec<Ref>, Error> {
let ls_refs = Command::LsRefs;
let mut ls_features = ls_refs.default_features(gix_transport::Protocol::V2, capabilities);
let mut ls_args = ls_refs.initial_arguments(&ls_features);
if capabilities
.capability("ls-refs")
.and_then(|cap| cap.supports("unborn"))
.unwrap_or_default()
{
ls_args.push("unborn".into());
}
let refs = match prepare_ls_refs(capabilities, &mut ls_args, &mut ls_features) {
Ok(Action::Skip) => Vec::new(),
Ok(Action::Continue) => {
ls_refs.validate_argument_prefixes_or_panic(
gix_transport::Protocol::V2,
capabilities,
&ls_args,
&ls_features,
);
progress.step();
progress.set_name("list refs");
let mut remote_refs = transport
.invoke(
ls_refs.as_str(),
ls_features.into_iter(),
if ls_args.is_empty() {
None
} else {
Some(ls_args.into_iter())
},
)
.await?;
from_v2_refs(&mut remote_refs).await?
}
Err(err) => {
indicate_end_of_interaction(transport).await?;
return Err(err.into());
}
};
Ok(refs)
}
}
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