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Here's my PR for supporting slug based deploys on Heroku. It required a minor refactoring of
PendingMigrationCheck
to make the interface simpler so you can provide your ownmigration_check
class.The README has usage docs on how to use slug-based deploys and run migrations using the
migration_check
option.I'm using it right now for multiple production apps, so it's got real-world usage. I'm open to further refinements, so let me know what you think.