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use std::{borrow::Cow, path::PathBuf};
use crate::{
bstr::ByteSlice,
config::tree::{gitoxide, Key},
Repository,
};
impl Repository {
/// Return `true` if the repository is a shallow clone, i.e. contains history only up to a certain depth.
pub fn is_shallow(&self) -> bool {
self.shallow_file()
.metadata()
.map_or(false, |m| m.is_file() && m.len() > 0)
}
/// Return a shared list of shallow commits which is updated automatically if the in-memory snapshot has become stale
/// as the underlying file on disk has changed.
///
/// The list of shallow commits represents the shallow boundary, beyond which we are lacking all (parent) commits.
/// Note that the list is never empty, as `Ok(None)` is returned in that case indicating the repository
/// isn't a shallow clone.
///
/// The shared list is shared across all clones of this repository.
pub fn shallow_commits(&self) -> Result<Option<crate::shallow::Commits>, crate::shallow::open::Error> {
self.shallow_commits.recent_snapshot(
|| self.shallow_file().metadata().ok().and_then(|m| m.modified().ok()),
|| {
let buf = match std::fs::read(self.shallow_file()) {
Ok(buf) => buf,
Err(err) if err.kind() == std::io::ErrorKind::NotFound => return Ok(None),
Err(err) => return Err(err.into()),
};
let mut commits = buf
.lines()
.map(gix_hash::ObjectId::from_hex)
.collect::<Result<Vec<_>, _>>()?;
commits.sort();
if commits.is_empty() {
Ok(None)
} else {
Ok(Some(commits))
}
},
)
}
/// Return the path to the `shallow` file which contains hashes, one per line, that describe commits that don't have their
/// parents within this repository.
///
/// Note that it may not exist if the repository isn't actually shallow.
pub fn shallow_file(&self) -> PathBuf {
let shallow_name = self
.config
.resolved
.string_filter_by_key(
gitoxide::Core::SHALLOW_FILE.logical_name().as_str(),
&mut self.filter_config_section(),
)
.unwrap_or_else(|| Cow::Borrowed("shallow".into()));
self.common_dir().join(gix_path::from_bstr(shallow_name))
}
}
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