a1a29f7c0b
Add a system for writing, running, and tracking database migrations (changes to the database schema) over time, inspired by but significantly simpler than postmodern-passenger-pigeon. Migrations can be generated by running (PANETTONE.MODEL:GENERATE-MIGRATION "name"), and are numerically ordered lisp files that define (at least) a function called UP, which runs the migration. The migrations that have been run against the database are tracked in the `migrations` table, and when the `(PANETTONE.MODEL:MIGRATE)` function is called (as it is on startup), all migrations that have not yet been run are run within a transaction. This includes one migration `1-init-schema.lisp`, which migrates the database (idempotently) to the current state of the schema. Change-Id: Id243a47763abea649784b12f25a6d05c2267381c Reviewed-on: https://cl.tvl.fyi/c/depot/+/11253 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org> |
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| atward | ||
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