Start nvim with file names from commit

git-vi

#!/bin/sh

case "$1" in
  -h|help|usage|--help)
    echo "$0 [head|modified|commit ref]"
    echo
    echo "examples:"
    echo " $0               # edit files from HEAD commit"
    echo " $0 -m            # edit modified files"
    echo " $0 -c HEAD~2     # edit files from commit"
    echo " $0 -c abc123     # edit files from commit"
    echo " $0 -c :/fix      # edit files from commit"
    ;;

  modified|m|-m)
    nvim $(git ls-files --modified)
    ;;

  commit|c|-c)
    nvim $(git diff-tree --no-commit-id --name-only -r "$2")
    ;;

  *|head|h|-h)
    nvim $(git diff-tree --no-commit-id --name-only -r HEAD)
    ;;
esac