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use crate::change::{Change, ChangeHeader};
use crate::pristine::{ChangeId, Hash, InodeMetadata, Position, Vertex};
#[cfg(feature = "ondisk-repos")]
pub mod filesystem;
pub mod memory;
pub trait ChangeStore {
fn has_contents(&self, hash: Hash, change_id: Option<ChangeId>) -> bool;
fn get_contents<F: Fn(ChangeId) -> Option<Hash>>(
&self,
hash: F,
key: Vertex<ChangeId>,
buf: &mut Vec<u8>,
) -> Result<usize, anyhow::Error>;
fn get_header(&self, h: &Hash) -> Result<ChangeHeader, anyhow::Error> {
Ok(self.get_change(h)?.hashed.header)
}
fn get_contents_ext(
&self,
key: Vertex<Option<Hash>>,
buf: &mut Vec<u8>,
) -> Result<usize, anyhow::Error>;
fn get_dependencies(&self, hash: &Hash) -> Result<Vec<Hash>, anyhow::Error> {
Ok(self.get_change(hash)?.hashed.dependencies)
}
fn get_extra_known(&self, hash: &Hash) -> Result<Vec<Hash>, anyhow::Error> {
Ok(self.get_change(hash)?.hashed.extra_known)
}
fn knows(&self, hash0: &Hash, hash1: &Hash) -> Result<bool, anyhow::Error> {
Ok(self.get_change(hash0)?.knows(hash1))
}
fn has_edge(
&self,
change: Hash,
from: Position<Option<Hash>>,
to: Position<Option<Hash>>,
flags: crate::pristine::EdgeFlags,
) -> Result<bool, anyhow::Error> {
let change_ = self.get_change(&change)?;
Ok(change_.has_edge(change, from, to, flags))
}
fn change_deletes_position<F: Fn(ChangeId) -> Option<Hash>>(
&self,
hash: F,
change: ChangeId,
pos: Position<Option<Hash>>,
) -> Result<Vec<Hash>, anyhow::Error>;
fn save_change(&self, p: &Change) -> Result<Hash, anyhow::Error>;
fn del_change(&self, h: &Hash) -> Result<bool, anyhow::Error>;
fn get_change(&self, h: &Hash) -> Result<Change, anyhow::Error>;
fn get_file_name<'a, F: Fn(ChangeId) -> Option<Hash>>(
&self,
hash: F,
vertex: Vertex<ChangeId>,
buf: &'a mut Vec<u8>,
) -> Result<(InodeMetadata, &'a str), anyhow::Error> {
buf.clear();
self.get_contents(hash, vertex, buf)?;
assert!(buf.len() >= 2);
let (a, b) = buf.as_slice().split_at(2);
Ok((InodeMetadata::from_basename(a), std::str::from_utf8(b)?))
}
}
impl crate::change::Atom<Option<Hash>> {
pub(crate) fn deletes_pos(&self, pos: Position<Option<Hash>>) -> Vec<Hash> {
let mut h = Vec::new();
if let crate::change::Atom::EdgeMap(ref n) = self {
for edge in n.edges.iter() {
if edge.to.change == pos.change && edge.to.start <= pos.pos && pos.pos < edge.to.end
{
if let Some(c) = edge.introduced_by {
h.push(c)
}
}
}
}
h
}
}