Travis CI caching hackeries

.create-travis-cache.sh

#!/bin/bash

# very simple script to generate a tar of dependencies in ivy cache for extraction in TravisCI.
# usage:  ./.create-travis-cache.sh <sbt-command>*
#
# By Default this will run `sbt update` with a clean cache directory and
# generate a .tar.bz2 with all the artifacts.   This file can be pushed into
# dropbox and expanded in your TravisCI server later for a slight improvement
# in resolution times.

STAGING_DIR="$(pwd)/sbt-zipped-home-cache"
TAR_NAME=sbt-cache.tar.bz2

# Create ivy cache of artifacts used
makeCache() {
  echo "Generating ivy cache..."
  sbt -d -Dsbt.boot.directory=${STAGING_DIR}/.sbt/boot -Dsbt.ivy.home=${STAGING_DIR}/.ivy2 -Divy.home=${STAGING_DIR}/.ivy2 update $@
}



# Create a new staging directory to save things.
makeTar() {
	pushd $STAGING_DIR

	# Now generate the TAR
	echo "Generating $TAR_NAME ..."
	tar -cjvf $TAR_NAME .ivy2 .sbt >/dev/null 2>&1

	#Now pop, we're done.
	popd
}


mkdir -p $STAGING_DIR/.ivy2
# Here we pass in optional commands to run.
makeCache "$@"
makeTar

.load-travis-cache.sh

#!/bin/bash

# WORKAROUND lack of caching in public repos:
# http://docs.travis-ci.com/user/caching/

curl -L https://www.dropbox.com/s/7v8qrukd6wmoydz/sbt-cache.tar.bz2 | tar xjf - -C $HOME

# always succeed: the cache is optional
exit 0

.travis.yml

language: scala
install:
  - bash ./.load-travis-cache.sh
.... TODO - YOUR STUFF HERE ...

typo in language.

also to be more general, using bash directly might be better incase people forget to chmod 755

@fommil thanks for the review!