Recursively find and grep through multiple Excel spreadsheets

grep_xlsx_files.sh

# convert *.xlsx to *.xlsx.csv using https://github.com/dilshod/xlsx2csv
pip install xlsx2csv
# (shell-fu from http://stackoverflow.com/a/12965604)
find . -iname "*.xlsx" -exec sh -c 'xlsx2csv "$1" > "$1.csv"' x {} \; 

# grep .csv files
brew install ripgrep
rg -i -g "*.csv" "waldo"

# ...or plain ole grep
grep -ir --include "*.csv" "waldo" .