#  Add vim/emacs modeline support \(\#44210\) · gitcafe/zed

[View on GitCafe](https://git.cafe/gitcafe/zed/commit/4186e5764f0719632c02165bd03d8ea790742b88)

Repository: [gitcafe/zed](https://git.cafe/gitcafe/zed)

Visibility: public

Requested revision: 4186e5764f0719632c02165bd03d8ea790742b88

Requested commit: 4186e5764f0719632c02165bd03d8ea790742b88

Commit: 4186e5764f0719632c02165bd03d8ea790742b88

Tree: 7a8709cc72211b4b5f8330912d5a1a7233613cbc

Author: Marc-Andre Lureau

Committer: GitHub

## Message

```
 Add vim/emacs modeline support  (#44210)

Many editors such as vim and emacs support "modelines", a comment at the
beginning of the file that allows the file type to be explicitly
specified along with per-file specific settings

- The amount of configurations, style and settings mapping cannot be
handled in one go, so this opens up a lot of potential improvements.
- I left out the possiblity to have "zed" specific modelines for now,
but this could be potentially interesting.
- Mapping the mode or filetype to zed language names isn't obvious
either. We may want to make it configurable.

This is my first contribution to zed, be kind. I struggled a bit to find
the right place to add those settings. I use a similar approach as done
with editorconfig (merge_with_editorconfig). There might be better ways.

Closes #4762

Release Notes:

- Add basic emacs/vim modeline support.

Supersedes #41899, changes:
- limit reading to the first and last 1kb
- add documentation
- more variables handled
- add Arc around ModelineSettings to avoid extra cloning
- changed the way mode -> language mapping is done, thanks to
`modeline_aliases` language config
- drop vim ex: support
- made "Local Variables:" handling a separate commit, so we can drop it
easily
- various code style improvements

---------

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
```

## Parents

- [8273e6d8687a70af709846d7e4cd8784bf5cc2aa](https://git.cafe/gitcafe/zed/commit/8273e6d8687a70af709846d7e4cd8784bf5cc2aa?format=markdown)

[Source at this commit](https://git.cafe/gitcafe/zed/tree/4186e5764f0719632c02165bd03d8ea790742b88?format=markdown)