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#!/bin/bash
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HADOOPDIR=/hadoop/cms/store/user/${USER}/$1
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rm unmerged/*.root
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echo "
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void mergeHadoopFiles() {
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TChain *chain = new TChain(\"tree\");
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chain->SetMaxTreeSize(5000000000LL); //default is 100000000000LL
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" > mergeHadoopFiles.C
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PREFIX=""
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for FILE in `ls $HADOOPDIR`; do
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echo cp ${HADOOPDIR}/${FILE} unmerged/
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cp ${HADOOPDIR}/${FILE} unmerged/
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echo "chain->Add(\"unmerged/${FILE}\");" >> mergeHadoopFiles.C
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PREFIX=`echo ${FILE} | sed 's/\(.*\)_merged.*.root/\1/'`
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done
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echo $PREFIX
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echo "
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chain->Merge(\"merged/${PREFIX}.root\", \"fast\");
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}" >> mergeHadoopFiles.C
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root -b -q mergeHadoopFiles.C
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