Layer

Defined in: packages/core/src/kernel/layer.ts:50

Metadata + content of a single overlay layer.

Remarks

A LayerStore holds these keyed by Layer.id. Layers form a chain via Layer.parent; the root of the chain has parent unset.

See

• createLayerFromFs
• LayerStore

Properties

command?

readonly optional command?: string

Defined in: packages/core/src/kernel/layer.ts:56

Build command that produced this layer (absent for layers created by commit/import).

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created

readonly created: number

Defined in: packages/core/src/kernel/layer.ts:58

Creation timestamp in ms since epoch, set by createLayerFromFs.

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fs

readonly fs: FrozenMemoryFS

Defined in: packages/core/src/kernel/layer.ts:62

Frozen upper memoryFS holding this layer’s diff (adds, modifications, and .wh.* whiteouts).

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id

readonly id: string

Defined in: packages/core/src/kernel/layer.ts:52

Chain-aware SHA-256 id: sha256(parent + contentHash). Globally unique within a store.

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parent?

readonly optional parent?: string

Defined in: packages/core/src/kernel/layer.ts:54

Parent layer id in the chain; undefined for the base layer.

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size

readonly size: number

Defined in: packages/core/src/kernel/layer.ts:60

Total bytes of file content in the frozen diff (excluding whiteouts), from computeLayerSize.