DbUp supports basic variable substitution, to enable you should register variables when configuring DbUp:

  .WithVariable("TestVariable", "Value")

Then in your database script:

-- $TestVariable$ $AnotherVariable$
print '$TestVariable$'
SELECT * FROM dbo.$TestVariable

Will execute:

-- Value $AnotherVariable$
print 'Value'
SELECT * FROM dbo.Value

Variables can only contain letters, digits, _ and -. If there are any other characters between the $s it is not treated as a variable. If a variable is found within a script, but not supplied an exception will be thrown unless it is within a comment.

Note: there is no way to escape variables, if this causes you issues, create a GitHub issue or submit a pull request to allow escaping!