Problem/Motivation
Following the proposed solution for #2842222: D7 Plain text fields incorrectly migrated to D8 as Text (formatted) as outlined in #107, we need a plugin to process the field type other than the current static map.
Proposed resolution
Write a process plugin called process_field which will take two configuration: the source field type and the name of a method to be called.
The plugin will then instantiate the appropriate Field plugin based on the given field type and call the given method on the instantiated Field plugin, which will return the processed destination field type.
Remaining tasks
Write a patch, Review
User interface changes
None.
API changes
None.
Data model changes
None.
