check-parity.sh

#!/bin/bash

cd $(dirname $(realpath $0))/parity

find \( -name data -o -name '*.vol*+*.par2' \) -prune -or -name '*.par2' -type f \
     \( -exec par2 verify -qq {} \; -o -print \) | sed 's/\.par2$//; s/^/Bad file: /'

gen-parity.sh

#!/bin/bash

cd $(dirname $(realpath $0))

rm -r parity

mkdir -p parity

ln -sfT ../ parity/data

find * -name parity -prune -or -type d -exec mkdir -p parity/{} \; -exec ln -sfT ../../{} parity/{}/data \;

cd parity

for d in . *; do
    if [[ -d $d ]] && [[ $d != data ]]; then
        pushd $d
        find -L data -maxdepth 1 -type f -exec bash -c 'par2 create -q -r25 $(basename $0).par2 $0' {} \;
        popd > /dev/null
    fi
done

repair-from-parity.sh

#!/bin/bash

cd $(dirname $(realpath $0))

for f in $(./check-parity | sed 's/^Bad file: //'); do
    par2 repair -q parity/$f.par2
done