tasks in build.sbt

[Channing]

Hi,

I'm trying to write tasks in a simple configuration, build.sbt, at the root of my project. I've read https://github.com/harrah/xsbt/wiki/Tasks but nothing I try from there works for me.

I am using v 0.11.0RC1

I've tried just adding a simple:

intTask := 5

 

in the build.sbt but I get 

 

.../build.sbt:44: error: not found: value intTask

intTask := 5

^

.../build.sbt:44: error: reassignment to val

intTask := 5

        ^

[error] Type error in expression

I then tried 

val intTask = TaskKey[Int]("int-task")

intTask := 5 

but that results in 

.../build.sbt:44: error: illegal start of simple expression

val intTask = TaskKey[Int]("int-task") 

What am I doing wrong? 

[Jason Zaugg]

The Light Configuration (build.sbt) isn't a single Scala program; instead it is a collection of independent expressions. So you can't define vals and refer to them from lower in the file.

Alternatives:

1. Inline the task key into the expression.

TaskKey[Int]("int-task") <:= 5

2. Use a block expression

{

   val intTask = TaskKey[Int]

   intTask := 5

}

3. Define the key `intTask` in the full configuration and refer to it from the light configuration.

-jason

[Channing Walton]

Hi,

I just tried:

TaskKey[Int]("int-task") <:= 5

But got

.../build.sbt:44: error: reassignment to val

Error occurred in an application involving default arguments.

TaskKey[Int]("int-task") <:= 5

[Josh Suereth]

You want := not <:=

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[Doug Tangren]

On Mon, Sep 19, 2011 at 8:47 AM, Josh Suereth <joshua....@gmail.com> wrote:

You want := not <:=

or possibly <<=. see https://github.com/harrah/xsbt/wiki/Settings for the list of available symbolic binding methods