just a nifty script
#!/bin/bash
#cd “$PWD/data/mods”
cd stable/data/mods # <<< Your cataclysm directory
grep -R obsolete | grep modinfo | cut -f1 -d ‘:’ | while read ln; do
while IFS= read ln2; do
echo "${ln2/'"obsolete": true'/'"obsolete": false'}"
done < "$ln" > tmp
mv tmp "$ln"
done