For building Spark only you may use sbt/sbt package. It's much faster. But if you use Spark in some infrastructure which requires the assembly, the only way is to use assembly target. 

On Fri, Oct 25, 2013 at 2:34 PM, Umar Javed <> wrote:
thanks. This takes a lot of time though. It takes me 10 mins for the build to finish after changing a single line of code. Is there a quicker way?

On Fri, Oct 25, 2013 at 2:35 AM, Sergey Soldatov <> wrote:
Hi Umar,
Exactly. You need to use sbt/sbt assembly
It will compile only changed files and build the assembly.


On Fri, Oct 25, 2013 at 1:29 PM, Umar Javed <> wrote:

After making a change to a .scala file in the spark source code, how I build it using sbt? Do I have to use 'sbt/sbt assembly' again?