use super::Db;use crate::{hash, loose, zlib::stream::DeflateWriter};use git_object::{owned, HashKind};use quick_error::quick_error;use std::{fs, io, io::Write, path::PathBuf};use tempfile::NamedTempFile; quick_error! { #[derive(Debug)] pub enum Error { Io(err: io::Error, msg: &'static str, path: PathBuf) { display("Could not {} '{}'", msg, path.display()) source(err) } IoRaw(err: io::Error) { display("An IO error occurred while writing an object") source(err) from() } Persist(err: tempfile::PersistError, target: PathBuf) { display("Could not turn temporary file into persisted file at '{}'", target.display()) source(err) } }} impl crate::Write for Db { type Error = Error; fn write_buf(&self, kind: git_object::Kind, from: &[u8], hash: HashKind) -> Result<owned::Id, Self::Error> { match hash { HashKind::Sha1 => { let mut to = self.write_header(kind, from.len() as u64, hash)?; to.write_all(from) .map_err(|err| Error::Io(err, "stream all data into tempfile in", self.path.to_owned()))?; to.flush()?; self.finalize_object(to) } } } fn write_stream( &self, kind: git_object::Kind, size: u64, mut from: impl io::Read, hash: HashKind, ) -> Result<owned::Id, Self::Error> { match hash { HashKind::Sha1 => { let mut to = self.write_header(kind, size, hash)?; io::copy(&mut from, &mut to) .map_err(|err| Error::Io(err, "stream all data into tempfile in", self.path.to_owned()))?; to.flush()?; self.finalize_object(to) } } }} type HashAndTempFile = DeflateWriter<NamedTempFile>; impl Db { fn write_header( &self, kind: git_object::Kind, size: u64, hash: HashKind, ) -> Result<hash::Write<HashAndTempFile>, Error> { let mut to = hash::Write::new( DeflateWriter::new( NamedTempFile::new_in(&self.path) .map_err(|err| Error::Io(err, "create named temp file in", self.path.to_owned()))?, ), hash, ); loose::object::header::encode(kind, size, &mut to) .map_err(|err| Error::Io(err, "write header to tempfile in", self.path.to_owned()))?; Ok(to) } fn finalize_object( &self, hash::Write { hash, inner: file }: hash::Write<HashAndTempFile>, ) -> Result<owned::Id, Error> { let id = owned::Id::from(hash.digest()); let object_path = loose::db::sha1_path(id.to_borrowed(), self.path.clone()); let object_dir = object_path .parent() .expect("each object path has a 1 hex-bytes directory"); if let Err(err) = fs::create_dir(object_dir) { match err.kind() { io::ErrorKind::AlreadyExists => {} _ => return Err(err.into()), } } let file = file.into_inner(); file.persist(&object_path) .map_err(|err| Error::Persist(err, object_path))?; Ok(id) }}
use super::Db;
use crate::{hash, loose, zlib::stream::DeflateWriter};
use git_object::{owned, HashKind};
use quick_error::quick_error;
use std::{fs, io, io::Write, path::PathBuf};
use tempfile::NamedTempFile;
quick_error! {
#[derive(Debug)]
pub enum Error {
Io(err: io::Error, msg: &'static str, path: PathBuf) {
display("Could not {} '{}'", msg, path.display())
source(err)
}
IoRaw(err: io::Error) {
display("An IO error occurred while writing an object")
source(err)
from()
}
Persist(err: tempfile::PersistError, target: PathBuf) {
display("Could not turn temporary file into persisted file at '{}'", target.display())
source(err)
}
}
}
impl crate::Write for Db {
type Error = Error;
fn write_buf(&self, kind: git_object::Kind, from: &[u8], hash: HashKind) -> Result<owned::Id, Self::Error> {
match hash {
HashKind::Sha1 => {
let mut to = self.write_header(kind, from.len() as u64, hash)?;
to.write_all(from)
.map_err(|err| Error::Io(err, "stream all data into tempfile in", self.path.to_owned()))?;
to.flush()?;
self.finalize_object(to)
}
}
}
fn write_stream(
&self,
kind: git_object::Kind,
size: u64,
mut from: impl io::Read,
hash: HashKind,
) -> Result<owned::Id, Self::Error> {
match hash {
HashKind::Sha1 => {
let mut to = self.write_header(kind, size, hash)?;
io::copy(&mut from, &mut to)
.map_err(|err| Error::Io(err, "stream all data into tempfile in", self.path.to_owned()))?;
to.flush()?;
self.finalize_object(to)
}
}
}
}
type HashAndTempFile = DeflateWriter<NamedTempFile>;
impl Db {
fn write_header(
&self,
kind: git_object::Kind,
size: u64,
hash: HashKind,
) -> Result<hash::Write<HashAndTempFile>, Error> {
let mut to = hash::Write::new(
DeflateWriter::new(
NamedTempFile::new_in(&self.path)
.map_err(|err| Error::Io(err, "create named temp file in", self.path.to_owned()))?,
),
hash,
);
loose::object::header::encode(kind, size, &mut to)
.map_err(|err| Error::Io(err, "write header to tempfile in", self.path.to_owned()))?;
Ok(to)
}
fn finalize_object(
&self,
hash::Write { hash, inner: file }: hash::Write<HashAndTempFile>,
) -> Result<owned::Id, Error> {
let id = owned::Id::from(hash.digest());
let object_path = loose::db::sha1_path(id.to_borrowed(), self.path.clone());
let object_dir = object_path
.parent()
.expect("each object path has a 1 hex-bytes directory");
if let Err(err) = fs::create_dir(object_dir) {
match err.kind() {
io::ErrorKind::AlreadyExists => {}
_ => return Err(err.into()),
}
}
let file = file.into_inner();
file.persist(&object_path)
.map_err(|err| Error::Persist(err, object_path))?;
Ok(id)
}
}