gistfile1.txt

#!/usr/bin/env bash

# Quick script that will prepent a `date:` field to all files. Helpful for a qiuck one time hack.

for file in $(find ${1} -type f); do
  last_modified=$(git log -n 1 --pretty=format:"%ad" --date=short -- "${file}")
  content="---\\ndate: ${last_modified}"

  echo "${file}"
  sed -i "1s/.*/${content}/" "${file}"
done