test scala with ruby

plugins.sbt

/* put this file in ~/.sbt/0.13/plugins/plugins.sbt */

/* style */
addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "0.8.0")

/* coursier -- faster dependencies */
addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.0-M14")

watch.rb

#!/usr/bin/env ruby

# REQUIREMENTS
#
# Needs ruby and the watchr gem, which can be installed
# globally via:
#
# sudo gem install watchr

# USAGE
#
# watchr watch.rb

dep = Gem::Dependency.new("watchr", "~>0.7.0")
unless dep.matching_specs.max_by(&:version)
  puts "You need to install '#{dep}'"
  puts "e.g. 'sudo gem install watchr'"
  exit!
end

IGNORED_DIRS = []
IGNORED_PATTERNS = []

is_watched = Proc.new do |f|
  File.directory?(f) &&
    IGNORED_DIRS.none? { |d| f.start_with?(d) } &&
    IGNORED_PATTERNS.none? { |p| p.match(f) }
end

code_dirs = Dir["./src/**/main/**/*"].select(&is_watched).
            map { |d| d[2..-1] }

test_dirs = Dir["./src/**/test/**/*"].select(&is_watched).
            map { |d| d[2..-1] }



puts "Watching test dirs: #{test_dirs}"
puts "Watching code dirs: #{code_dirs}"


sbt_style = "sbt scalastyle"
sbt_test = "sbt test"

(code_dirs + test_dirs).map { |d| /#{d}\/.+\.scala$/ }.each do |to_watch|
  watch(to_watch) do |md|
    system(sbt_style) && system(sbt_test)
  end
end