one thing i quite like about scala is that ability to run it in
“interpreted” mode via the scala command. that allows me —
similiar to python or ipython — to experiment and quickly try things
out or even test my classes and objects.
what was a bit of a pain was getting the proper classpath constructed
so that not only target/classes was picked up but also all the
required dependencies. poking a bit around in maven’s plugin
documentation i came across the dependency plugin and in particular
the dependency:build-classpath mojo, armed with that information i
came up with the following rather useful shell script:
#!/bin/bash
top=$(pwd)
cwd=$(pwd)
while [ "$top" != "/" -a ! -e "$top/pom.xml" ] ; do
cd ..
top=$(pwd)
done
cd $cwd
if [ -e "$top/pom.xml" ] ; then
cd $top
echo "generating scala classpath based on maven pom.xml"
mvn dependency:build-classpath -Dmdep.outputFile=.classpath-scala
echo "starting scala"
scala -cp target/classes:$(cat .classpath-scala)
else
echo "cannot find top level pom.xml! must have taken a wrong turn somewhere. sorry."
exit 1
fi
save under a convenient name, stir, and enjoy: call this script instead of calling scala directly.
all content posted on these pages is an expression of my own mind.
my employer is welcome to
share these opinions but then again he might not want to.
and as has been pointed out to me, a simple
does the job as well! oh, well…
comment by dirk husemann — January 18, 2010 @ 09:57