Is it possible to save a REPL session in a file? Is there a minimum version of Scala requiered to do this? I remember having seen someone do it, but I can't fine it in :help or in the documentation.
This is possible as of Scala 2.11. Example usage:
scala> 1
res0: Int = 1
scala> 2
res1: Int = 2
scala> 3
res2: Int = 3
scala> :save xxx
scala> :load xxx
Loading xxx...
res3: Int = 1
res4: Int = 2
res5: Int = 3
You can :reset before a :load to get correct references to results:
scala> 1
res0: Int = 1
scala> res0 + 1
res1: Int = 2
scala> :save xxx
later that day...
scala> 7
res0: Int = 7
scala> :reset
Resetting interpreter state.
Forgetting this session history:
7
Forgetting all expression results and named terms: $intp
scala> :load xxx
Loading xxx...
res0: Int = 1
res1: Int = 2
Note that you have in addition of the native Scala REPL the shell-scripting project Ammonite, which does have a Save/Loadd Session feature:
Apart from plain saves and loads, which simply discard everything after the most recent save, you can also provide a name to these functions.
That lets you stop working on a branch, go do something else for a while, and be able to come back later to continue where you left off:
@ val (x, y) = (1, 2)
x: Int = 1
y: Int = 2
@ sess.save("xy initialized")
@ val z = x + y
z: Int = 3
@ sess.save("first z")
@ sess.load("xy initialized")
@ val z = x - y
z: Int = -1
来源：https://stackoverflow.com/questions/22104736/how-to-save-repl-session