Bash script to pull git repositories, clone them, view log and grab the first email address seen.

git_log_first_email.sh

#!/bin/bash
# Set up a repos.txt file that contains a list of all the repos
# one repo per line. Then create an emails.txt file which is where
# all the emails will go. It'll be a CSV file so you can verify.
# This is a quick hacky way to get emails, not sure if I covered all
# valid characters in regex but didn't need precision. Feel free to
# make it better!

reponame="https://github.com/[a-zA-Z0-9._-]+/([a-zA-Z0-9._-]+)$"
email="<([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.\w+)>"
file="emails.txt"  # Where emails go (CSV file)

while read p; do
  echo "Working on $p"
  git clone $p;
  [[ $p =~ $reponame ]]
  folder="${BASH_REMATCH[1]}"
  echo "Folder: $folder"
  cd $folder
  var=`git log`
  [[ $var =~ $email ]]
  cd ..
  echo "Add ${BASH_REMATCH[1]} to emails.txt"
  printf "$p, ${BASH_REMATCH[1]}\n" >> $file
  rm -rf $folder
done < repos.txt