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#!/bin/sh
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[ -z "$1" -o -z "$2" ] && {
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# usage
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echo "usage: $0 <directory> <diff-extension>" 1>&2
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exit 1
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}
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find $1 \( -name "*$2" -o -name ".*$2" \) -print |
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while read f; do
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U=-u
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[ "`basename $f`" = "ChangeLog$2" ] && U=-U0
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diff ${U} $f `echo $f | sed s/$2\$//`
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done
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