How to deal with obsolete files?

[manoelneto]

Looks like the UPDATE_SNAPSHOT flag doesn't remove obsolete snapshots. Should I do it manually then?

[boardfish]

Yeah, it would seem so. VCR had a similar discussion, and there's a formatter available there that hits some false positives in my experience. I'm not sure how the same would look for rspec-snapshot, so in the meantime, I did the following inside each snapshot directory (I only have one right now):

rg -IN --only-matching 'match_snapshot\("(.*)"\)' -r '$1.snap' | sort -u > ../safe_snapshots.txt
for i in *; do
    if ! grep -qxFe "$i" ../safe_snapshots.txt; then
        echo "Deleting: $i"
        # the next line is commented out.  Test it.  Then uncomment to remove the files
        # rm "$i"
    fi
done

This won't work if you alias match_snapshot or use it as part of a matcher.