git_helpers.sh

function git_likely_authority() {
  # Outputs a ranked list of likely author(itie)s regarding tracked files matching *${1}*
  # (Makes it easier to discover who likely knows most about the matched files)
  # (Note: Not always indicative if large refactors/renamings have occurred)
  # E.g. `git_likely_authority some_pattern_that_matches_a_path`
  git ls-files "*${1}*" |
  grep -v -E 'node_modules|vendor' | # edit to avoid certain files/dirs
  xargs -n1 git blame --line-porcelain |
  sed -n 's/^author //p' |
  sort -f |
  uniq -ic |
  sort -nr
}

function git_blame_string() {
  # Outputs a ranked list of authors that introduce or removed the given <string>
  # E.g. `git_blame_word SomeFunctionName`
  git log -S"${1}" --stat | sed -n 's/^Author: //p' | sort -f | uniq -ic | sort -nr
}

the_example_output

➜ jquery git:(master) git_blame_string toggleClass
    14 John Resig <jeresig@gmail.com>
     4 Brandon Aaron <brandon.aaron@gmail.com>
     3 Ariel Flesler <aflesler@gmail.com>
     2 jeresig <jeresig@gmail.com>
     2 Yehuda Katz <wycats@Yehuda-Katz.local>
     2 Timmy Willison <timmywillisn@gmail.com>
     2 Richard Gibson <richard.gibson@gmail.com>
     1 Yehuda Katz <wycats@gmail.com>
     1 Oleg <markelog@gmail.com>
     1 Jörn Zaefferer <joern.zaefferer@gmail.com>
     1 David Serduke <davidserduke@gmail.com>
     1 Anton M <obhvsbypqghgc@gmail.com>