root/bin/join_passthru @ 743
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#!/bin/sh
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# Joins two map spreadsheets A->B0 and B0->B1 to A->B1, B1 a modification of B0
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selfDir="$(dirname -- "$0")" |
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test "$#" -eq 2 || { echo "Usage: $0 map_0 map_1 >joined_map" >&2; exit 2;} |
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"$selfDir/join" <"$1" "$2"|"$selfDir/union" "$1" |