Can a Scala script reference other uncompiled scala code in the same directory?

Question

If I have two separate uncompiled scala files in the same directory as:

// hello.scala
object hello {
  def world() = println("hello world")
}

and:

// do.scala
hello.world()

I get an error when running do.scala:

$ scala do.scala
error: not found: value hello

Instead I have to compile the hello.scala file first and put it on the classpath to get it to work:

$ scalac hello.scala
$ scala -cp hello do.scala
hello world

Is there a way to get one script to call the other uncompiled scala file using the right use of import, package, classpath, the scala command line tool or something else?

I did post a similar question a while ago. The answers might be useful: stackoverflow.com/questions/3760645/… — Guillaume Belrose
– Guillaume Belrose, Commented Apr 4, 2012 at 13:31

timday · Accepted Answer · 2012-04-04 13:10:49Z

8

Maybe not exactly what you're looking for, but from the Scala REPL shell you can do

:load hello.scala
:load do.scala

to achieve the same result:

$ scala
Welcome to Scala version 2.9.1 (Java HotSpot(TM) Server VM, Java 1.6.0_26).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :load hello.scala
Loading hello.scala...
defined module hello

scala> :load do.scala
Loading do.scala...
hello world

scala>

If you're wanting something non-interactive for scripting

$ cat <<EOF | scala
:load hello.scala
:load do.scala
EOF

works too.

Use :help for more interesting things the REPL shell can do.

edited Apr 4, 2012 at 13:10

answered Apr 4, 2012 at 12:59

timday

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3 Comments

user1305156 Over a year ago

Interesting. If I had other jars I needed to call from the code could I use the same trick but with "cat <<EOF | scala -cp jarfile.jar"?

user1305156 Over a year ago

Doing this or just "cat myreplcommandsfile | scala" works but makes my shell unusable after that annoyingly.

timday Over a year ago

I note there is another REPL trick ':cp <path>' which claims to allow you to add a jar or a directory to the classpath. And yes I noticed it did something horrible to my xterm state after it finished too but I thought it was just me. Not sure what the fix for that is; simply redirecting output doesn't seem to help.

pr1001 · Accepted Answer · 2012-04-04 12:16:37Z

2

Looking into on the fly compilation/embedding the compiler. Twitter's util-eval is one such example.

answered Apr 4, 2012 at 12:16

pr1001

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1 Comment

Sasha Over a year ago

Util-eval is removed.

Hsiao L · Accepted Answer · 2020-02-06 19:45:19Z

0

You can just put

:load /path/file

at the first line in the file you are going to load.

answered Feb 6, 2020 at 19:45

Hsiao L

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