thin_fetch/command/
ls_refs.rs

1use std::str::FromStr;
2
3use crate::{Command, Error, HashKind, Reference, WithError, bail, command::Execute};
4
5/// List remote references.
6///
7/// ## Example
8///
9/// ```
10/// # use thin_fetch::command::LsRefs;
11/// # use thin_fetch::HashKind;
12/// let ls_refs = LsRefs {
13///     peel: false,
14///     symrefs: false,
15///     unborn: false,
16///     ref_prefix: Some("refs/heads/".to_owned()),
17///     hash_kind: HashKind::Sha1,
18/// };
19/// ```
20#[derive(Default)]
21pub struct LsRefs {
22    pub peel: bool,
23    pub symrefs: bool,
24    pub unborn: bool,
25    pub ref_prefix: Option<String>,
26    pub hash_kind: HashKind,
27}
28
29impl From<&LsRefs> for Command {
30    fn from(value: &LsRefs) -> Self {
31        let mut cmd = Command::new("ls-refs").object_format(value.hash_kind);
32
33        if value.peel {
34            cmd = cmd.arg("peel");
35        }
36        if value.symrefs {
37            cmd = cmd.arg("symrefs");
38        }
39        if value.unborn {
40            cmd = cmd.arg("unborn");
41        }
42        if let Some(ref_prefix) = &value.ref_prefix {
43            cmd = cmd.arg(format!("ref-prefix {ref_prefix}"));
44        }
45
46        cmd
47    }
48}
49
50impl Execute for LsRefs {
51    type Output = Vec<Reference>;
52
53    fn execute(&self, repo: &crate::Repo) -> Result<Self::Output, Error> {
54        let cmd = self.into();
55        let parcel = repo.call(&cmd)?;
56
57        if parcel.sections.is_empty() {
58            return Ok(vec![]);
59        }
60
61        if parcel.sections.len() > 1 {
62            bail!("expected 1 response, got {}", parcel.sections.len());
63        }
64
65        let refs = parcel.sections.into_iter().next().unwrap();
66
67        refs.chunks
68            .into_iter()
69            .map(|a| {
70                let str = String::from_utf8(a).with_err_msg("could not decode ref as utf-8");
71                str.and_then(|s| Reference::from_str(&s).with_err_msg("could not parse reference"))
72            })
73            .collect()
74    }
75}
thin_fetch/command/ls_refs.rs

thin_fetch/command/
ls_refs.rs
