Imported From: https://issues.scala-lang.org/browse/SI-8503?orig=1
Reporter: Eric Kolotyluk (kolotyluk)
Affected Versions: 2.10.3

Michele Esposito (mresposito) said:
see PR: scala/scala#3691

@som-snytt said:
It seems to me that -version should behave the same as other info messages like -Xshow-phases or -help.

I would refactor -version to CompilerCommand to enforce that uniformity.

Then the question is whether the current behavior is useful. I'm not sure why scalac differs from the runner, but arguably scalac -version foo.scala && scala Foo means I think my file was recompiled if it is run. I just wanted to make sure I always use the correct version of the compiler.

Similarly, scala -Xshow-phases foo.scala && scala bar.scala just means I want to verify some info in the middle of the compound command.

Maybe it needs the equivalent of -Xfatal-warnings, such as -Xfatal-info for the current behavior.

Michele Esposito (mresposito) said:
I agree that -version should conform with -Xshow-phases and -help, and other additional comands. However, those also throw exitCode=1. And, as you have noted, also scalac -version throws exitCode=1.

So, what do you think this should be changed to? I think that the correct behaviour would be to output to stderr, but return no error code

@som-snytt said:
Just to clarify:

apm@mara:~$ scalac -version
Scala compiler version 2.10.4-RC3 -- Copyright 2002-2013, LAMP/EPFL
apm@mara:~$ echo $?
0
apm@mara:~$ scalacm -version
Scala compiler version 2.11.0-RC3 -- Copyright 2002-2013, LAMP/EPFL
apm@mara:~$ echo $?
0
apm@mara:~$ scalacm -version junk.scala
Scala compiler version 2.11.0-RC3 -- Copyright 2002-2013, LAMP/EPFL
apm@mara:~$ echo $?
0

The difference is:

apm@mara:~$ scalam -version
Scala code runner version 2.11.0-RC3 -- Copyright 2002-2013, LAMP/EPFL
apm@mara:~$ echo $?
1

My proposal was that you can request whether info messages result in a non-zero exit code.

@som-snytt said:
This version makes the info output uniformly exit code zero albeit output on stderr, consistent with java.

scala/scala#3800