56 lines
1.1 KiB
Bash
56 lines
1.1 KiB
Bash
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#!/bin/sh
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# Splits an interval list into multiple files
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if [ $# -lt 2 ]; then
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echo "Usage: $0 <input> <output> [ .. <output> ]"
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exit 1
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else
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inputFile=$1
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shift
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totalLines=$(wc -l < $inputFile)
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exec 3< $inputFile
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numHeaders=0
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while true; do
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read -u 3 nextLine
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if [ $? -ne 0 ]; then break; fi
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if [[ $nextLine != @* ]]; then break; fi
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((numHeaders++))
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done
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numFiles=$#
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((numIntervals = totalLines - numHeaders))
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if [ $numIntervals -lt $numFiles ]; then
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echo "Error: Number of intervals $numIntervals is less than the number of files $numFiles."
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exec 3<&-
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exit 1
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fi
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((linesPerFile = numIntervals / numFiles))
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((remainder = numIntervals % numFiles))
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((linesPerFile++))
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fileNumber=0
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for outputFile in $@; do
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# Earlier files with get the remainder until it's no longer needed.
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if [ $fileNumber -eq $remainder ]; then ((linesPerFile--)); fi
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((fileNumber++))
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head -n $numHeaders $inputFile > $outputFile
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for ((line=0; line<$linesPerFile; line++)); do
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echo "$nextLine" >> $outputFile
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read -u 3 nextLine
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if [ $? -ne 0 ]; then break; fi
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done
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done
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exec 3<&-
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fi
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