Scala as shell script alt

[Marc Haubenstock]

Hi,

As I recently discovered scala can be used as a shell script language (btw. how cool is that?!? )

 [http://scala-lang.org/documentation/getting-started.html]

Has anyone tried using scala as such? Whats the user experience / performance i.e. noticeable execution degradation?

[Yago Alonso]

I use Scala scripting to manipulate XML files and it's great, specially since you can very easily combine it with sed / awk thanks to the scala.sys.process package. But yeah, startup time is a nuisance. It gets much better if you add the -savedcompiled option on your script at the head of your script. 

#!/bin/sh

exec scala -savecompiled "$0" "$@"

!#

 #your scala script goes here

[Marc Haubenstock]

Ah, thanks for that flag. Ill try it out once I have the time to convert my bash script into scala!

[Sebastian Nozzi]

Does -savecompiled produce a compiled file in the same directory as the source file?

Or in some hidden temp directory?

2013/11/10 Marc Haubenstock <marc.dha...@gmail.com>

Ah, thanks for that flag. Ill try it out once I have the time to convert my bash script into scala!

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[Yago Alonso]

It saves a .jar file on the same directory, and checks the script for modification every time it runs. If there have been changes, it will recompile

[Yago Alonso]

At yesterday's meetup, someone was asking about how to handle dependencies on scripts. This link is  the whole story on how to do it with sbt.