bash - Directory of running script in Fish shell -

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I am trying to run SBT using fish shell. Below I am trying to achieve what is the equivalent bidding script: 

  java -xmx512m -jar `dirname $ 0` / sbt-launch.jar" $ @ "

I see in the fish document that Bash can be converted into fish from $ argv in $ @ but I can not see that How to change dirname $ 0

Do anyone know the same script in fish?

$ _ Only work directly through the reader / command line, or when the script's help

For me, it may work for you: 

  java-xmx512m -jar (dirname (status -f)) / sbt-launch .jar "$ argv" # Fish

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