Module migrate 

Migrations: a document of an older version rewritten into the current version’s shape.

Each step takes a document of one version to the next, working on its JSON before any type reads it, since the older version’s types are gone. A document is taken through every step from its own version to VERSION, then read as a document of the current version, so everything the current reader checks, it still checks (ADR-112).

from	to	what changes
0.1	0.2	attachments, the source file’s other files, is renamed source_files, leaving “attachment” to mean a file carried beside the design in a .hprz; a .ork source’s airframe_not_as_written, which 0.1 didn’t record, is worked out from the configurations, or set to UNKNOWN when they don’t show it

Constants

OLDEST

The oldest version this reader migrates from.

UNKNOWN

The reason a 0.1 document migrates with when none of its configurations shows whether its .ork airframe was read exactly as written.

Functions

migrates_from

Whether this reader migrates a document of version to the current one.