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annotate bin/share_by_task.sh @ 101:e2e64c3d763e

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bug4 fixed, but that created a new, earlier bug
author Henry S. Thompson <ht@inf.ed.ac.uk>
date Mon, 11 Sep 2023 22:06:45 +0100
parents dfdb95e5d774
children
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11
dfdb95e5d774 catch-up
Henry S. Thompson <ht@inf.ed.ac.uk>
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1 #!/bin/bash
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2 # Usage: share_by_task.sh [-f format] [-s from to] N task
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3 # Filter a sequence by mod N == task
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4 # Sequence is stdin, or if -s then seq $from $t
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5 if [ "$1" = '-f' ]
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Henry S. Thompson <ht@inf.ed.ac.uk>
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6 then
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7 shift
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8 f=$1
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9 shift
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10 else
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11 f='%s\n'
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12 fi
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13
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14 if [ "$1" = '-s' ]
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15 then
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16 shift
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17 source="seq $1 $2"
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18 shift
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19 shift
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20 else
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21 source="cat"
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Henry S. Thompson <ht@inf.ed.ac.uk>
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22 fi
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23
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24 pos=0
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25 ${source} | while read v
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26 do
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27 if [ $((++pos % $1)) -eq $2 ]
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Henry S. Thompson <ht@inf.ed.ac.uk>
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28 then
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Henry S. Thompson <ht@inf.ed.ac.uk>
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29 printf "$f" $v
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30 fi
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31 done