54 lines
2.1 KiB
Go
54 lines
2.1 KiB
Go
// Package snapshot implements export/import/wipe of MetaMesh metadata.
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//
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// The on-disk format is a ZIP archive containing one nested-JSON file per
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// indexed root. Schema is defined by ManifestSchemaVersion; readers must
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// reject archives whose schemaVersion exceeds what they know.
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//
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// v2 (current): root identifiers are UUIDv7 (Crockford Base32). Entries
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// under metadata/<root>.json carry the flat string properties; the cids
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// and duplicates Redis SETs are NOT serialized yet — they are rebuilt
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// transparently on import because SetMetadataFlat / MergeMetadataFlat
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// auto-register reverse-index aliases for any cid_*/midhash256 field they
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// see (see internal/storage/cid_resolution.go).
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//
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// v1 (legacy): roots were content-hash-typed tokens like "midhash256:abc".
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// v1 archives can no longer be imported — they would resurrect the
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// privileged-hashID schema this layer was built to retire.
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package snapshot
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import "time"
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// ManifestSchemaVersion is the on-disk format version. Bump when the layout
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// of metadata/{root}.json or the manifest changes in a non-additive way.
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const ManifestSchemaVersion = 2
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// MetadataDir is the path inside the ZIP that holds per-CID JSON files.
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const MetadataDir = "metadata/"
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// ManifestFile is the path inside the ZIP that holds the manifest JSON.
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const ManifestFile = "manifest.json"
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// IndexFile is the path inside the ZIP that holds the file index (CID list).
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const IndexFile = "index.json"
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// Manifest is the metadata header stored at the root of every snapshot ZIP.
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type Manifest struct {
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SchemaVersion int `json:"schemaVersion"`
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GeneratedAt time.Time `json:"generatedAt"`
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SourceHost string `json:"sourceHost,omitempty"`
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MetaCoreVer string `json:"metaCoreVersion,omitempty"`
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FileCount int `json:"fileCount"`
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Includes Includes `json:"includes"`
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}
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// Includes records which optional sections are present in a snapshot.
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type Includes struct {
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Metadata bool `json:"metadata"`
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PluginOutput bool `json:"pluginOutput,omitempty"`
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}
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// IndexFileBody is the structure of index.json inside the ZIP.
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type IndexFileBody struct {
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HashIDs []string `json:"hashIds"`
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}
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