git add with grep

.gitconfig

[alias]
  grep-add = "!sh -c 'git ls-files -m -o --exclude-standard | grep $1 | xargs git add' -"
  grep-add-patch = "!sh -c 'git add -p `git ls-files -m -o --exclude-standard | grep $1`' -"

my_aliases.zsh

alias gga='git grep-add'
alias ggap='git grep-add-patch'

single alias for git add -p with and without grep

# enable single alias for both git add -p and grep + git add -p 
function git-add-patch; {
  if (( $# == 0 )); then
    git add -p
  else
    git grep-add-patch $1
  fi;
}

alias gap='git-add-patch'

$ gap pattern
$ gap