Script Pre-Processors are a really handy extensibility hook into DbUp, it allows you to modify a script before it is executed. Some examples of how this can/is used:

  • Variable Substitution
  • Replacing incompatible types
  • For SqlCe/SQLite we automatically replace nvarchar(max) with ntext
  • Stripping the $schema$. variable out of databases which do not support schemas

Writing your own

To create your own pre-processor just implement the IScriptPreprocessor interface then register is with your DbUp builder:

  .WithPreProcessor(new MyPreprocessor())