After installing Scala using MacPorts, scala command is not found

I am running Snow Le开发者_StackOverflow中文版opard and installed MacPorts. I then installed the latest (as of this writing) Scala version as:

$ sudo port install scala29

What to do after this? When I try to execute the Scala interpreter, I get:

-bash: scala: command not found

I'm using MacPorts 2.1.2 and things seems to changed a bit again.

$ sudo port select --list scala

Shows

Available versions for scala:
    none (active)
    scala2.9

Command suggested by nezda does not work properly: $ sudo port select --set scala2.9

gives error

Error: The 'set' command expects two arguments: <group>, <version>

But following helps

$ sudo port select --set scala scala2.9

Activates Scala 2.9

Selecting 'scala2.9' for 'scala' succeeded. 'scala2.9' is now active.

Checking scala again

$ sudo port select --list scala
Available versions for scala:
        none
    scala2.9 (active)

And I can run Scala now.

This seems to have changed. On Lion + MacPorts 2.1.1, I had to do the following:

Verify this shows the version:

    sudo port select --list scala

Mine showed:

    Available versions for scala:
        none (active)
        scala29

If it is not selected, you can use this command to select it:

    sudo port select --set scala scala29

Open a new terminal (ensuring $PATH is up to date) and verify scala is now 2.9.x.

Okay, so I actually had to search this since the Scala install has changed since the last time I did it. The executables should have been linked from /opt/local/bin, to use them without prefixing the folders do this:

cd /opt/local/bin
sudo scala_select scala29

Now you should be able to run the scala command from any directory.

As of January 2013 this answer is outdated, Arnost Valicek's answer is known to work.

I think it's:

sudo port select --set scala scala29