bash - Redirect only the last line of STDOUT to a file

Question

I'm compiling Scala code and write the output console output in file. I only want to save the last line of the STDOUT in a file. Here is the command:

scalac -Xplugin:divbyzero.jar Example.scala >> output.txt

The output of scalac -Xplugin:divbyzero.jar Example.scala is:

helex@mg:~/git-repositories/my_plugin$ scalac -Xplugin:divbyzero.jar Example.scala | tee -a output.txt
You have overwritten the standard meaning
Literal:()
rhs type: Int(1)
Constant Type: Constant(1)
We have a literal constant
List(localhost.Low)
Constant Type: Constant(1)
Literal:1
rhs type: Int(2)
Constant Type: Constant(2)
We have a literal constant
List(localhost.High)
Constant Type: Constant(2)
Literal:2
rhs type: Boolean(true)
Constant Type: Constant(true)
We have a literal constant
List(localhost.High)
Constant Type: Constant(true)
Literal:true
LEVEL: H
LEVEL: H
okay
LEVEL: H
okay
false
symboltable: Map(a -> 219 | Int | object TestIfConditionWithElseAccept2 | normalTermination | L, c -> 221 | Boolean | object TestIfConditionWithElseAccept2 | normalTermination | H, b -> 220 | Int | object TestIfConditionWithElseAccept2 | normalTermination | H)
pc: Set(L, H)

And I only want to save pc: Set(L, H) in the output file and not the rest. With the help of which command I can achieve my goal?

Answer 1

Just pipe stdout through tail -n 1 to your file