write rubygems version to cache
write rubygems version to cache

travis-ci/heroku-buildpack-ruby,zunda/heroku-buildpack-ruby,ltrademark/heroku-buildpack-ruby,DouglasAllen/heroku-buildpack-ruby,donnykurnia/heroku-buildpack-ruby,jonasoberschweiber/heroku-buildpack-ruby,fcruxen/ruby-buildpack,CPPWind/ruby-buildpack,cordata/heroku-buildpack-ruby,sky-uk/help-heroku-buildpack,icelab/heroku-buildpack-ruby,rowanoulton/heroku-buildpack-ruby,hixi/heroku-buildpack-ruby,phusion/heroku-buildpack-ruby,mrhenry/heroku-buildpack-ruby,leonardykris/mos-ruby-buildpack,rvizza/heroku-buildpack-gsl-ruby,hellojustin/heroku-buildpack-custom-ruby,catalyzeio/buildpack-ruby,schu/buildpack-testing,blueapron/heroku-buildpack-ruby,anay/buildpack-ruby-with-oracle-jdk,recursecenter/heroku-buildpack-ruby,tdenovan/heroku-buildpack-ruby,Jonty/ruby-buildpack,rhomobile/heroku-buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,dtao/teeny-buildpack,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,d-reinhold/cf-buildpack-ruby,dleavitt/heroku-buildpack-ruby,fcruxen/ruby-buildpack,crdschurch/heroku-buildpack-ruby,musicglue/heroku-buildpack-ruby,lyoshenka/heroku-buildpack-ruby-jekyll,musicglue/heroku-buildpack-ruby,schu/buildpack-testing,Dim25/heroku-buildpack-ruby-GSL,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,ndbroadbent/heroku-buildpack-turbo-sprockets,orenyk/heroku-buildpack-ruby,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,schu/heroku-buildpack-ruby,phusion/heroku-buildpack-ruby,Jonty/ruby-buildpack,jayshreeanand/heroku-buildpack-ruby,takii/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,righi/instacart-heroku-buildpack,makifund/heroku-buildpack-ruby,trumaker/heroku-buildpack-turbo-sprockets,mattmanning/heroku-buildpack-ruby-jekyll,space150/heroku-buildpack-ruby,recursecenter/heroku-buildpack-ruby,ascot21/heroku-buildpack-turbo-sprockets,icelab/heroku-buildpack-ruby,takii/heroku-buildpack-ruby,rowanoulton/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,cmaggard/heroku-buildpack-turbo-sprockets,iamjarvo/ruby-buildpack,packetmonkey/heroku-buildpack-ruby,dieze/heroku-buildpack-ruby-hooks,gls1/heroku-buildpack-ruby-pdftk,diasks2/heroku-buildpack-mecab,fgbreel/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,redhotvengeance/heroku-buildpack-deep-thought,andycroll/heroku-buildpack-jekyll,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,0x00evil/heroku-buildpack-ruby,qnyp/heroku-buildpack-ruby-bower,gls1/heroku-buildpack-ruby-pdftk-new,iamjarvo/ruby-buildpack,sky-uk/ruby-buildpack,dleavitt/heroku-buildpack-ruby,aarongray/heroku-buildpack-ruby,ActiveState/heroku-buildpack-ruby,guidance-guarantee-programme/heroku-buildpack-princexml-old,shuber/heroku-buildpack-ruby,ericroberts/heroku-buildpack-ruby,takii/db2rubybuildpack,cloudfoundry/ruby-buildpack,jumptvs/BP_Ruby,zoomer/heroku-buildpack-ruby-bower,DouglasAllen/heroku-buildpack-ruby,tomwolfe/heroku-buildpack-gsl-ruby,teodor-pripoae/heroku-buildpack-ruby,mintybit/heroku-buildpack-ruby,sstelfox/buildpack-ruby,derrek/heroku-buildpack-ruby,DigitalInnovation/heroku-buildpack-mslabs,wolfoo2931/heroku-buildpack-ruby-2a352ae,hatofmonkeys/ruby-testing-buildpack,cloudn/buildpack-ruby,progrium/heroku-buildpack-ruby,HYPERHYPER/heroku-buildpack-ruby,pkgr/buildpack-ruby-precise-old,hixi/heroku-buildpack-ruby,teodor-pripoae/heroku-buildpack-ruby,mrhenry/heroku-buildpack-ruby,pilotcreative/heroku-buildpack-ruby,davidjrice/heroku-buildpack-couchbase-ruby,ltrademark/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,KoanHealth/heroku-buildpack-marvin-setup,dieze/heroku-buildpack-ruby-hooks,hatofmonkeys/ruby-testing-buildpack,gls1/heroku-buildpack-ruby-pdftk-new,ibmdb/db2rubybuildpack,bwaite-jaroop/heroku-buildpack-ruby,jasonlevens/heroku-buildpack-ruby,tdenovan/heroku-buildpack-ruby,rhomobile/heroku-buildpack-ruby,ilpoldo/heroku-buildpack-ruby,ablease/custom-buildpack,barakav/heroku-buildpack-ruby,beydogan/ruby-buildpack,jeremyvdw/heroku-buildpack-ruby-jekyll,cloudn/buildpack-ruby,fcruxen/ruby-buildpack,sky-uk/ruby-buildpack,makifund/heroku-buildpack-ruby,Git-Host/prelang-buildpack,zunda/heroku-buildpack-ruby,ilpoldo/heroku-buildpack-ruby,sky-uk/ruby-buildpack,Genius/heroku-buildpack-ruby,qstream/heroku-buildpack-ruby,awebneck/heroku-buildpack-canvas,hpcloud/heroku-buildpack-ruby,mperejda/heroku-buildpack-ruby,ablease/custom-buildpack,d-reinhold/cf-buildpack-ruby,allomov/fat-free-heroku-buildpack-ruby,reesio/heroku-buildpack-ruby,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,moneyadviceservice/heroku-buildpack-ruby-bowndler,bskyb-commerce/ruby-buildpack,gbenedict/heroku-buildpack-ruby,takii/db2rubybuildpack,mattwalters/heroku-buildpack-ruby,bwaite-jaroop/heroku-buildpack-ruby,hpcloud/ruby-buildpack,Scalingo/ruby-buildpack,schu/heroku-buildpack-ruby,wakermahmud/heroku-buildpack-jekyll,bskyb-commerce/help-heroku-buildpack,hpcloud/ruby-buildpack,simonnordberg/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,pkgr/heroku-buildpack-ruby,jumptvs/BP_Ruby,sky-uk/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,gbenedict/heroku-buildpack-ruby,shuber/heroku-buildpack-ruby,michaelphines/alexa-nest,vhx/heroku-buildpack,lyoshenka/heroku-buildpack-ruby-jekyll,guidance-guarantee-programme/heroku-buildpack-princexml-old,ericboehs/heroku-buildpack-ruby,dtao/deft-buildpack-ruby,tenjikinc/heroku-buildpack-ruby,hatofmonkeys/ruby-testing-buildpack,cloudn/buildpack-ruby,hpcloud/ruby-buildpack,bskyb-commerce/help-heroku-buildpack,dlorson/gentle-buildpack,anay/buildpack-ruby-with-oracle-jdk,ActiveState/heroku-buildpack-ruby,dtao/deft-buildpack-ruby,bskyb-commerce/ruby-buildpack,ndbroadbent/heroku-buildpack-turbo-sprockets,samfrench/heroku-buildpack-ruby,qnyp/heroku-buildpack-ruby-bower,wolfoo2931/heroku-buildpack-ruby-2a352ae,electricobjects/heroku-buildpack-ruby,pkgr/heroku-buildpack-ruby,ibmdb/db2rubybuildpack,heroku/heroku-buildpack-ruby,fgbreel/heroku-buildpack-ruby,engineyard/heroku-buildpack-ruby,Jonty/ruby-buildpack,orenyk/heroku-buildpack-ruby,Git-Host/prelang-buildpack,Altoros/ruby-buildpack,brightbytes/heroku-buildpack-ruby-without-assets-precompile,awebneck/heroku-buildpack-canvas,swipesense/heroku-buildpack-ruby,davidjrice/heroku-buildpack-couchbase-ruby,codykrieger/heroku-buildpack-jekyll,AdStage/heroku-buildpack-ruby,bskyb-commerce/ruby-buildpack,ascot21/heroku-buildpack-turbo-sprockets,cmaggard/heroku-buildpack-turbo-sprockets,Altoros/ruby-buildpack,stolt45/heroku-buildpack-ruby-with-sqlite3,stolt45/heroku-buildpack-ruby-with-sqlite3,crdschurch/heroku-buildpack-ruby,progrium/heroku-buildpack-ruby,jonasoberschweiber/heroku-buildpack-ruby,leonardykris/mos-ruby-buildpack,diasks2/heroku-buildpack-mecab,barakav/heroku-buildpack-ruby,dlorson/gentle-buildpack,amaltson/heroku-buildpack-ruby,ablease/custom-buildpack,jasonlevens/heroku-buildpack-ruby,bellycard/heroku-buildpack-ruby,daltonrenaldo/heroku-buildpack-ruby,packetmonkey/heroku-buildpack-ruby,hellojustin/heroku-buildpack-custom-ruby,sanemat/heroku-buildpack-ruby-tachikoma,zidekmat/buildpack-ruby,dtao/teeny-buildpack,catalyzeio/buildpack-ruby,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,vhx/heroku-buildpack,cloudfoundry/ruby-buildpack,moneyadviceservice/heroku-buildpack-ruby-bowndler,daltonrenaldo/heroku-buildpack-ruby,takii/db2rubybuildpack,travis-ci/heroku-buildpack-ruby,Jonty/ruby-buildpack,mintybit/heroku-buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk,cloudControl/buildpack-ruby,wakermahmud/heroku-buildpack-jekyll,tomwolfe/heroku-buildpack-gsl-ruby,jumptvs/BP_Ruby,pietrop/heroku-buildpack-ruby,d-reinhold/cf-buildpack-ruby,donnykurnia/heroku-buildpack-ruby,ruby/heroku-buildpack-www-ruby-lang,simonnordberg/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,takii/db2rubybuildpack,mattwalters/heroku-buildpack-ruby,pietrop/heroku-buildpack-ruby,Dim25/heroku-buildpack-ruby-GSL,michaelphines/alexa-nest,jonseaberg/heroku-buildpack-turbo-sprockets,erintherad/heroku-buildpack-ruby,tpope/heroku-buildpack-ruby-tpope,sanemat/heroku-buildpack-ruby-tachikoma,sstelfox/buildpack-ruby,sky-uk/help-heroku-buildpack,pilotcreative/heroku-buildpack-ruby,amaltson/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,KoanHealth/heroku-buildpack-marvin-setup,mperejda/heroku-buildpack-ruby,DigitalInnovation/heroku-buildpack-mslabs,zoomer/heroku-buildpack-ruby-bower,ChefSteps/heroku-buildpack-ruby,HYPERHYPER/heroku-buildpack-ruby,DyegoCosta/heroku-buildpack-ruby,tpope/heroku-buildpack-ruby-tpope,codykrieger/heroku-buildpack-jekyll,engineyard/heroku-buildpack-ruby,ibmdb/db2rubybuildpack,jgable/buildpack-ruby-rack-setup-tasks,fcruxen/ruby-buildpack,cloudfoundry/ruby-buildpack,CPPWind/ruby-buildpack,aarongray/heroku-buildpack-ruby,swipesense/heroku-buildpack-ruby,AdStage/heroku-buildpack-ruby,redhotvengeance/heroku-buildpack-deep-thought,jeremyvdw/heroku-buildpack-ruby-jekyll,stefansundin/heroku-buildpack-ruby,derrek/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,Micka33/heroku-buildpack-ruby-liblua,electricobjects/heroku-buildpack-ruby,cordata/heroku-buildpack-ruby,tenjikinc/heroku-buildpack-ruby,ablease/custom-buildpack,space150/heroku-buildpack-ruby,DyegoCosta/heroku-buildpack-ruby,blueapron/heroku-buildpack-ruby,pkgr/buildpack-ruby-precise-old,ekaranto/rails4-bluemix-buildpack,stefansundin/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,Altoros/ruby-buildpack,cloudControl/buildpack-ruby,ChefSteps/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,ericroberts/heroku-buildpack-ruby,mattmanning/heroku-buildpack-ruby-jekyll,rvizza/heroku-buildpack-gsl-ruby,CPPWind/ruby-buildpack,travis-ci/heroku-buildpack-ruby,zidekmat/buildpack-ruby,reesio/heroku-buildpack-ruby,pkgr/buildpack-ruby-precise-old,samfrench/heroku-buildpack-ruby,Genius/heroku-buildpack-ruby,0x00evil/heroku-buildpack-ruby,hpcloud/heroku-buildpack-ruby,progrium/heroku-buildpack-ruby,jumptvs/BP_Ruby,AdStage/heroku-buildpack-ruby,hpcloud/ruby-buildpack,scottatron/moc-buildpack,orlando/heroku-buildpack-ruby,allomov/fat-free-heroku-buildpack-ruby,Micka33/heroku-buildpack-ruby-liblua,phusion/heroku-buildpack-ruby,scottatron/moc-buildpack,Altoros/ruby-buildpack,jayshreeanand/heroku-buildpack-ruby,erintherad/heroku-buildpack-ruby,beydogan/ruby-buildpack,davidjrice/heroku-buildpack-couchbase-ruby,bellycard/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,trumaker/heroku-buildpack-turbo-sprockets,ericboehs/heroku-buildpack-ruby,righi/instacart-heroku-buildpack,qstream/heroku-buildpack-ruby,jgable/buildpack-ruby-rack-setup-tasks,cloudn/buildpack-ruby,sanemat/heroku-buildpack-ruby-tachikoma,CPPWind/ruby-buildpack,bskyb-commerce/ruby-buildpack,orlando/heroku-buildpack-ruby,Scalingo/ruby-buildpack