Module export 

The official emulator’s export format (Cloud Datastore’s managed export), byte for byte.

An export named N is a directory N/ holding:

• N.overall_export_metadata: a log of two records, the version byte 0x33 and an OverallExportMetadata message pointing at each kind directory’s metadata, with its entity count and output size; an empty export has no pointer and no kind directory;
• all_namespaces/all_kinds/all_namespaces_all_kinds.export_metadata: a plain message with the export’s name, start and end time (microseconds), and its output files;
• all_namespaces/all_kinds/output-0: a log with one entity per document.

docs/export-format.md describes every field; tests/fixtures/export_import.json in the hidane crate holds exports written by the official emulator.

Modules

datastore

Datastore mode’s entities as App Engine EntityProtos, the records of an export the official emulator writes in --database-mode datastore-mode (tests/fixtures/datastore_export.json in the hidane crate).

entity

Documents as App Engine EntityProtos, the records of an export’s output-* files.

log

The LevelDB log format the export files are written in.

Structs

ExportedDocument

A document as an export holds it.

Malformed

Malformed protobuf.

Pointer

An OverallExportMetadata pointer to a kind directory’s metadata.

Enums

OverallError

Why an overall metadata file was refused.

Constants

KIND_METADATA

Where the one kind directory’s metadata sits, relative to the export directory.

OUTPUT

The one output file, relative to the kind directory.

VERSION

The first record of an overall metadata file.

Functions

export_metadata

The contents of a kind directory’s .export_metadata.

overall_metadata

The contents of {name}.overall_export_metadata.

parse_export_metadata

The output files a kind’s metadata lists, relative to its directory.

parse_overall_metadata

The kind metadata paths an overall metadata file points at, relative to its directory.