require 'formula' class Hadoop < Formula url 'http://www.apache.org/dyn/closer.cgi?path=hadoop/core/hadoop-0.21.0/hadoop-0.21.0.tar.gz' homepage 'http://hadoop.apache.org/common/' md5 'ec0f791f866f82a7f2c1319a54f4db97' def shim_script target <<-EOS.undent #!/bin/bash exec #{libexec}/bin/#{target} $@ EOS end def install rm_f Dir["bin/*.bat"] libexec.install %w[bin conf lib webapps mapred] libexec.install Dir['*.jar'] bin.mkpath Dir["#{libexec}/bin/*"].each do |b| n = Pathname.new(b).basename (bin+n).write shim_script(n) end inreplace "#{libexec}/conf/hadoop-env.sh", "# export JAVA_HOME=/usr/lib/j2sdk1.6-sun", "export JAVA_HOME=$(/usr/libexec/java_home)" end def caveats; <<-EOS.undent In Hadoop's config file: #{libexec}/conf/hadoop-env.sh $JAVA_HOME has been set to be the output of: /usr/libexec/java_home EOS end end