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Source type: filetree

This source type interprets a directory structure of the following kind:

.clunky-migration-tool-source-filetree
 v0001
     from-scratch
         000-schema.sql
         010-data.sql
 v0002
     from-previous
         000-patch-schema.sql
         010-update-data.sql
     from-scratch
         000-schema.sql
         010-data.sql
 v0003
     from-previous
         000-patch-schema.sql
     from-scratch
         000-schema.sql
         010-data.sql

Function source_initialize is not needed and therefore not defined.

Function source_get_changes accepts a start version and an end version parameter. Version first references the first version, v0001 in the example above, and version last references the last version, v0003 in the example above.

Versions are considered in the lexicographical order of their names - using semantic versioning alone won't work. Downgrades are currently not supported: supplying a start version that is after or equal to the end version produces an empty result.

If the start version is scratch, the files in the from-scratch directory corresponding to the supplied end version are returned. Otherwise, the list of files in the from-previous directories spanning from the start version, but not including it, up to the end version is returned.

Examples

source_get_changes scratch v3
./v0003/from-scratch/000-schema.sql
./v0003/from-scratch/010-data.sql

source_get_changes v0003 v0003
# empty response

source_get_changes v0001 v0003
./v0002/from-previous/000-patch-schema.sql
./v0002/from-previous/010-update-data.sql
./v0003/from-previous/000-patch-schema.sql