Enum MountStorage 

pub enum MountStorage {
    Folder {
        path: PathBuf,
    },
    GitBranch {
        gitdir: PathBuf,
        branch: String,
    },
    Archive {
        path: PathBuf,
    },
    InMemory,
}

Storage reference for a Mount. One variant per crate::backend::MemBackend implementation. New backends add a variant; the file-adapter learns to round-trip it.

Variants

Folder

Folder backend — mem lives as a directory tree on disk. The mem root may be the workspace root itself (collapsed single-mem form: .memstead/config.json at root, no mems/ subfolder) or a sibling mem subfolder.

Fields

path: PathBuf

Absolute path to the mem root directory.

GitBranch

Git-branch backend — mem lives as a branch in a mem-repo gitdir. Multi-repo workspaces are supported by varying gitdir across mounts (see the Storage backend glossary entry’s per-mount git-repo block for the trade-offs).

Fields

gitdir: PathBuf

Absolute path to the gitdir (typically <workspace>/mem-repo/.git).

branch: String

Branch name within the gitdir holding the mem content.

Archive

Archive backend — mem lives inside a sealed .mem zip archive. Always read-only; mounts of this storage carry MountCapability::ReadOnly.

Fields

path: PathBuf

Absolute path to the sealed archive file.

InMemory

In-memory backend — mem lives entirely in RAM, with no filesystem path and no git. Created empty, dropped with the engine, leaving no on-disk residue. Serves ephemeral per-session playground mems. Carries no fields: there is nothing to locate on disk, and the backend holds all state itself (see crate::storage::InMemoryBackend).

Implementations

impl MountStorage

pub fn backend_id(&self) -> &'static str

Stable kebab-case backend identifier surfaced in error envelopes (e.g. MARKDOWN_EXPORT_UNSUPPORTED_BACKEND’s active_backend detail) and in the on-disk mounts.json serialisation. The kebab-case form matches the MountStorageWire #[serde(tag, rename_all = "kebab-case")] tag.

pub fn is_durable(&self) -> bool

Whether writes (and, for read-only backends, the loaded content) survive process restart / session-TTL eviction. Folder, GitBranch, and Archive all live on disk and persist; only InMemory is volatile — its state is dropped with the engine, so a commit_sha it returns denotes nothing durable. This is the fact the durability marker projects: derived from the storage kind, not from current_head() (which is None for both Folder and InMemory and so cannot tell them apart).

Trait Implementations

impl Clone for MountStorage

fn clone(&self) -> MountStorage

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MountStorage

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for MountStorage

impl PartialEq for MountStorage

fn eq(&self, other: &MountStorage) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MountStorage