项目位置在SBT中意味着什么？

Question

To define a project, I do

project in file(".")

What is the function of file(".") , as opposed to settings baseDirectory ?

For example, what is the difference between

lazy val myProject = project in file("foo")

and

lazy val myProject = (project in file(".")).settings(
  baseDirectory := file("foo"))

Answer 1

For projects, there is no difference between using project in file(...) and setting baseDirectory yourself. use show baseDirectory to convince yourself :)

However, since baseDirectory is a setting, it can be used with any scope, eg you can set the base directory for a specific configuration or task.