cmake is required during the installation of the rugged gem
cmake is required during the installation of the rugged gem

The following error is encountered during the installation of the rugged gem:

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /usr/bin/ruby2.1 extconf.rb
    checking for cmake... no
    ERROR: CMake is required to build Rugged.
    *** extconf.rb failed ***

fscherwi/gitlabhq,atomaka/gitlabhq,revaret/gitlabhq,NARKOZ/gitlabhq,szechyjs/gitlabhq,mathstuf/gitlabhq,fearenales/gitlabhq,sakishum/gitlabhq,dwrensha/gitlabhq,gorgee/gitlabhq,revaret/gitlabhq,SkyWei/gitlabhq,Razer6/gitlabhq,duduribeiro/gitlabhq,eliasp/gitlabhq,rebecamendez/gitlabhq,atomaka/gitlabhq,rhels/gitlabhq,mrb/gitlabhq,Soullivaneuh/gitlabhq,dukex/gitlabhq,OlegGirko/gitlab-ce,manfer/gitlabhq,Telekom-PD/gitlabhq,initiummedia/gitlabhq,michaKFromParis/gitlabhq,martinma4/gitlabhq,OtkurBiz/gitlabhq,fendoudeqingchunhh/gitlabhq,Exeia/gitlabhq,nguyen-tien-mulodo/gitlabhq,cncodog/gitlab,ksoichiro/gitlabhq,mr-dxdy/gitlabhq,pulkit21/gitlabhq,larryli/gitlabhq,jirutka/gitlabhq,fpgentil/gitlabhq,bozaro/gitlabhq,LUMC/gitlabhq,jaepyoung/gitlabhq,icedwater/gitlabhq,pulkit21/gitlabhq,ibiart/gitlabhq,theodi/gitlabhq,icedwater/gitlabhq,manfer/gitlabhq,SkyWei/gitlabhq,julianengel/gitlabhq,k4zzk/gitlabhq,aaronsnyder/gitlabhq,liyakun/gitlabhq,johnmyqin/gitlabhq,sakishum/gitlabhq,allysonbarros/gitlabhq,darkrasid/gitlabhq,axilleas/gitlabhq,rebecamendez/gitlabhq,chenrui2014/gitlabhq,sekcheong/gitlabhq,hq804116393/gitlabhq,cinderblock/gitlabhq,NKMR6194/gitlabhq,fpgentil/gitlabhq,zBMNForks/gitlabhq,martinma4/gitlabhq,whluwit/gitlabhq,copystudy/gitlabhq,mente/gitlabhq,t-zuehlsdorff/gitlabhq,aaronsnyder/gitlabhq,tk23/gitlabhq,pjknkda/gitlabhq,jvanbaarsen/gitlabhq,stellamiranda/mobbr-gitlabhq,cui-liqiang/gitlab-ce,tempbottle/gitlabhq,kemenaran/gitlabhq,ksoichiro/gitlabhq,salipro4ever/gitlabhq,jrjang/gitlab-ce,delkyd/gitlabhq,whluwit/gitlabhq,hq804116393/gitlabhq,Telekom-PD/gitlabhq,hzy001/gitlabhq,tempbottle/gitlabhq,stoplightio/gitlabhq,rfeese/gitlab-ce,childbamboo/gitlabhq,tim-hoff/gitlabhq,icedwater/gitlabhq,salipro4ever/gitlabhq,williamherry/gitlabhq,wangcan2014/gitlabhq,sideci-sample/sideci-sample-gitlabhq,H3Chief/gitlabhq,chenrui2014/gitlabhq,Datacom/gitlabhq,k4zzk/gitlabhq,mr-dxdy/gitlabhq,flashbuckets/gitlabhq,koreamic/gitlabhq,youprofit/gitlabhq,theonlydoo/gitlabhq,SVArago/gitlabhq,mente/gitlabhq,michaKFromParis/gitlabhq,fearenales/gitlabhq,mrb/gitlabhq,ordiychen/gitlabhq,mrb/gitlabhq,larryli/gitlabhq,OlegGirko/gitlab-ce,theodi/gitlabhq,tempbottle/gitlabhq,youprofit/gitlabhq,yuyue2013/ss,williamherry/gitlabhq,bbodenmiller/gitlabhq,t-zuehlsdorff/gitlabhq,Razer6/gitlabhq,yama07/gitlabhq,mmkassem/gitlabhq,dukex/gitlabhq,martijnvermaat/gitlabhq,nguyen-tien-mulodo/gitlabhq,aaronsnyder/gitlabhq,zrbsprite/gitlabhq,wangcan2014/gitlabhq,yfaizal/gitlabhq,nmav/gitlabhq,DanielZhangQingLong/gitlabhq,sue445/gitlabhq,fpgentil/gitlabhq,eliasp/gitlabhq,dreampet/gitlab,ordiychen/gitlabhq,stoplightio/gitlabhq,ttasanen/gitlabhq,123Haynes/gitlabhq,rumpelsepp/gitlabhq,jrjang/gitlabhq,larryli/gitlabhq,jrjang/gitlab-ce,copystudy/gitlabhq,xuvw/gitlabhq,SkyWei/gitlabhq,stoplightio/gitlabhq,gorgee/gitlabhq,LUMC/gitlabhq,mavimo/gitlabhq,theonlydoo/gitlabhq,ttasanen/gitlabhq,chadyred/gitlabhq,ZeoAlliance/gitlabhq,iiet/iiet-git,daiyu/gitlab-zh,folpindo/gitlabhq,yama07/gitlabhq,vjustov/gitlabhq,liyakun/gitlabhq,aaronsnyder/gitlabhq,luzhongyang/gitlabhq,revaret/gitlabhq,initiummedia/gitlabhq,Datacom/gitlabhq,t-zuehlsdorff/gitlabhq,htve/GitlabForChinese,szechyjs/gitlabhq,johnmyqin/gitlabhq,ksoichiro/gitlabhq,theonlydoo/gitlabhq,adaiguoguo/gitlab_globalserarch,copystudy/gitlabhq,szechyjs/gitlabhq,ferdinandrosario/gitlabhq,michaKFromParis/gitlabhq,cinderblock/gitlabhq,jrjang/gitlab-ce,Exeia/gitlabhq,Kambda/mobbr-gitlabhq,nmav/gitlabhq,pjknkda/gitlabhq,fgbreel/gitlabhq,whluwit/gitlabhq,sekcheong/gitlabhq,iiet/iiet-git,kemenaran/gitlabhq,stanhu/gitlabhq,zBMNForks/gitlabhq,tim-hoff/gitlabhq,Kambda/Mobbr,H3Chief/gitlabhq,cncodog/gitlab,ayufan/gitlabhq,pulkit21/gitlabhq,mente/gitlabhq,Devin001/gitlabhq,yfaizal/gitlabhq,hq804116393/gitlabhq,openwide-java/gitlabhq,bigsurge/gitlabhq,H3Chief/gitlabhq,mavimo/gitlabhq,hacsoc/gitlabhq,pjknkda/gitlabhq,kitech/gitlabhq,williamherry/gitlabhq,ordiychen/gitlabhq,LUMC/gitlabhq,MauriceMohlek/gitlabhq,cui-liqiang/gitlab-ce,jvanbaarsen/gitlabhq,rumpelsepp/gitlabhq,whluwit/gitlabhq,mathstuf/gitlabhq,DanielZhangQingLong/gitlabhq,allistera/gitlabhq,shinexiao/gitlabhq,folpindo/gitlabhq,allysonbarros/gitlabhq,123Haynes/gitlabhq,gopeter/gitlabhq,ferdinandrosario/gitlabhq,openwide-java/gitlabhq,mente/gitlabhq,rhels/gitlabhq,duduribeiro/gitlabhq,bigsurge/gitlabhq,yatish27/gitlabhq,icedwater/gitlabhq,since2014/gitlabhq,yuyue2013/ss,k4zzk/gitlabhq,ikappas/gitlabhq,shinexiao/gitlabhq,luzhongyang/gitlabhq,ayufan/gitlabhq,fantasywind/gitlabhq,rumpelsepp/gitlabhq,duduribeiro/gitlabhq,mavimo/gitlabhq,flashbuckets/gitlabhq,Burick/gitlabhq,it33/gitlabhq,Devin001/gitlabhq,hacsoc/gitlabhq,allysonbarros/gitlabhq,theodi/gitlabhq,Tyrael/gitlabhq,htve/GitlabForChinese,TheWatcher/gitlabhq,dreampet/gitlab,gopeter/gitlabhq,stanhu/gitlabhq,joalmeid/gitlabhq,8thcolor/testing-public-gitlabhq,windymid/test2,DanielZhangQingLong/gitlabhq,vjustov/gitlabhq,MauriceMohlek/gitlabhq,ikappas/gitlabhq,mmkassem/gitlabhq,yatish27/gitlabhq,yatish27/gitlabhq,LytayTOUCH/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