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use std::path::{Path, PathBuf};
use crate::Bundle;
/// Returned by [`Bundle::at()`]
#[derive(thiserror::Error, Debug)]
#[allow(missing_docs)]
pub enum Error {
#[error("An 'idx' extension is expected of an index file: '{0}'")]
InvalidPath(PathBuf),
#[error(transparent)]
Pack(#[from] crate::data::header::decode::Error),
#[error(transparent)]
Index(#[from] crate::index::init::Error),
}
/// Initialization
impl Bundle {
/// Create a `Bundle` from `path`, which is either a pack file _(*.pack)_ or an index file _(*.idx)_.
///
/// The corresponding complementary file is expected to be present.
///
/// The `object_hash` is a way to read (and write) the same file format with different hashes, as the hash kind
/// isn't stored within the file format itself.
pub fn at(path: impl AsRef<Path>, object_hash: gix_hash::Kind) -> Result<Self, Error> {
Self::at_inner(path.as_ref(), object_hash)
}
fn at_inner(path: &Path, object_hash: gix_hash::Kind) -> Result<Self, Error> {
let ext = path
.extension()
.and_then(std::ffi::OsStr::to_str)
.ok_or_else(|| Error::InvalidPath(path.to_owned()))?;
Ok(match ext {
"idx" => Self {
index: crate::index::File::at(path, object_hash)?,
pack: crate::data::File::at(path.with_extension("pack"), object_hash)?,
},
"pack" => Self {
pack: crate::data::File::at(path, object_hash)?,
index: crate::index::File::at(path.with_extension("idx"), object_hash)?,
},
_ => return Err(Error::InvalidPath(path.to_owned())),
})
}
}
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