The outline-indent Emacs package provides a minor mode that enables code folding and outlining based on indentation levels for various indentation-based text files, such as YAML, Python, and other indented text files.

In addition to code folding, outline-indent allows moving indented sub-trees up and down, promoting and demoting sections to adjust indentation levels, customizing the ellipsis, and inserting a new line with the same indentation level as the current line, among other features.

The outline-indent package leverages the built-in outline-minor-mode, which is maintained by the Emacs developers and has less chance of being abandoned like origami.el.

The outline-indent Emacs package offers a similar functionality to Vim’s set foldmethod=indent setting. Just as in Vim, it allows to fold and unfold code sections based on their indentation levels.

Installation

To install the outline-indent from MELPA:

1. If you haven’t already done so, add MELPA repository to your Emacs configuration.
2. Add the following code to your Emacs init file to install the outline-indent package from MELPA:

(use-package outline-indent
  :ensure t
  :custom
  (outline-indent-ellipsis " ▼ "))Code language: Lisp (lisp)

More information about outline-indent

• Usage, Installation, Frequently Asked Questions: outline-indent @GitHub