Trait Backend 

pub trait Backend:
    Send
    + Sync
    + Debug {
    // Required methods
    fn name(&self) -> &str;
    fn commit_id_length(&self) -> usize;
    fn change_id_length(&self) -> usize;
    fn git_repo(&self) -> Option<Repository>;
    fn read_file(
        &self,
        path: &RepoPath,
        id: &FileId,
    ) -> BackendResult<Box<dyn Read>>;
    fn write_file(
        &self,
        path: &RepoPath,
        contents: &mut dyn Read,
    ) -> BackendResult<FileId>;
    fn read_symlink(
        &self,
        path: &RepoPath,
        id: &SymlinkId,
    ) -> BackendResult<String>;
    fn write_symlink(
        &self,
        path: &RepoPath,
        target: &str,
    ) -> BackendResult<SymlinkId>;
    fn root_commit_id(&self) -> &CommitId;
    fn root_change_id(&self) -> &ChangeId;
    fn empty_tree_id(&self) -> &TreeId;
    fn read_tree(&self, path: &RepoPath, id: &TreeId) -> BackendResult<Tree>;
    fn write_tree(
        &self,
        path: &RepoPath,
        contents: &Tree,
    ) -> BackendResult<TreeId>;
    fn read_conflict(
        &self,
        path: &RepoPath,
        id: &ConflictId,
    ) -> BackendResult<Conflict>;
    fn write_conflict(
        &self,
        path: &RepoPath,
        contents: &Conflict,
    ) -> BackendResult<ConflictId>;
    fn read_commit(&self, id: &CommitId) -> BackendResult<Commit>;
    fn write_commit(&self, contents: &Commit) -> BackendResult<CommitId>;
}

Required Methods

fn name(&self) -> &str

A unique name that identifies this backend. Written to .jj/repo/store/backend when the repo is created.

fn commit_id_length(&self) -> usize

The length of commit IDs in bytes.

fn change_id_length(&self) -> usize

The length of change IDs in bytes.

fn git_repo(&self) -> Option<Repository>

fn read_file( &self, path: &RepoPath, id: &FileId, ) -> BackendResult<Box<dyn Read>>

fn write_file( &self, path: &RepoPath, contents: &mut dyn Read, ) -> BackendResult<FileId>

fn read_symlink(&self, path: &RepoPath, id: &SymlinkId) -> BackendResult<String>

fn write_symlink( &self, path: &RepoPath, target: &str, ) -> BackendResult<SymlinkId>

fn root_commit_id(&self) -> &CommitId

fn root_change_id(&self) -> &ChangeId

fn empty_tree_id(&self) -> &TreeId

fn read_tree(&self, path: &RepoPath, id: &TreeId) -> BackendResult<Tree>

fn write_tree(&self, path: &RepoPath, contents: &Tree) -> BackendResult<TreeId>

fn read_conflict( &self, path: &RepoPath, id: &ConflictId, ) -> BackendResult<Conflict>

fn write_conflict( &self, path: &RepoPath, contents: &Conflict, ) -> BackendResult<ConflictId>

fn read_commit(&self, id: &CommitId) -> BackendResult<Commit>

fn write_commit(&self, contents: &Commit) -> BackendResult<CommitId>

Implementors

impl Backend for GitBackend

impl Backend for LocalBackend