Feature request: provide hook into "Initialize Brewfile" process

[kyounger]

I'm wondering if there might be a way to get some kind of hook defined after a Brewfile is updated automatically. In my situation, I would like to auto-commit that change via chezmoi. Perhaps calling a defined shell function callback or filesystem shell script?

[rcmdnk]

I just added _post_brewfile_update function in brew-wrap.

By using brew-wrap, you can add actions after Brewfile is updated.

Add the following lines to your .bashrc or .zshrc:

if [ -f $(brew --prefix)/etc/brew-wrap ];then
  source $(brew --prefix)/etc/brew-wrap

  _post_brewfile_update () {
    echo "Brewfile was updated!"
  }
fi

If you add a new package by brew install <package>,
then it shows Brewfile was updated!.

If you do not want to use brew-warp,
maybe the minimal setup is like:

brew () {
  local exe="command brew"
  if [ "$1" != "file" ];then
    $exe "$@"
    return $?
  fi
  shift
  exe="command brew-file"
  local brewfile=$(cat $(brew-file get_files))
  eval $exe "$@"
  ret=$?
  if ! diff <(echo "$brewfile") <(cat $(brew-file get_files)) >/dev/null;then
    echo "Brewfile was updated!"
  fi
  return $ret
}

Then, if brew file init changes your Brewfile,
it shows Brewfile was updated!

You can modify commands in there as you like.