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#!/bin/bash
cat - <<\EOF > /dev/null
Invoke e.g., like this
DU1=du-4.5.2 DU2=du ./du-tests
EOF
test -x "$DU1" || { echo DU1 envvar not set; exit 1; }
test -x "$DU2" || { echo DU2 envvar not set; exit 1; }
# Expects $DU1 and $DU2 to be the binaries to compare.
d1=$(mktemp -d)
cp -a $DU1 $d1/du
d2=$(mktemp -d)
cp -a $DU2 $d2/du
for args in \
'-Sa .' \
'-Sa ../..' \
'-Sa a' \
'-Sa /tmp /t' \
'-Sa /tmp' \
'/tmp /t' \
'-a /tmp /t' \
'-a a' \
'-ca .' \
'-ca ..' \
'-ca ../..' \
'-ca /tmp /t' \
'-ca /tmp' \
'-ca a' \
; do
echo Args: $args ======================
diff -u --label=$DU1 --label=$DU2 \
<(PATH=$d1 du $args 2>&1) <(PATH=$d2 du $args 2>&1)
done
rm -rf $d1 $d2
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