git log + fzf + delta => returns git_sha

glog.fish

# ported from https://github.com/junegunn/fzf/wiki/examples#git
function glog --description 'git log + fzf + delta => returns git_sha'
  set -lx git_dir (git rev-parse --git-dir 2> /dev/null)
  if test -n "$git_dir"
    set -l EXTRACTED_SHA "echo {} | head -1 | cut -d' ' -f1"
    set -l VIEW_LINE "$EXTRACTED_SHA | xargs -I % sh -c 'git show --color=always % | delta'"
    set -l FORMAT "%C(auto)%h%d %s %C(black)%C(bold)%cr% C(auto)%aE"
    set -l commit_sha (git log --color=always --format="$FORMAT" $argv \
      | fzf --no-sort --reverse --tiebreak=index --no-multi --ansi --preview="$VIEW_LINE" \
      | cut -d' ' -f1)
    if test -n "$commit_sha"
      echo $commit_sha
    end
  else
    echo "'$PWD' is not a git repository"
  end
end