package merlin
Install
Dune Dependency
Authors
Maintainers
Sources
sha256=e7f28ca520d1ab4a58e8ba876b665b1ecf9917cee7e5b3e3330afbd1d12a9e2a
sha512=40ae93397aea031c1b4450998b448fc1df9671d612be0a02986688e5dd1390ced1c31bb2cdde9c6b52f8be841ca9fd1931fc302b26ef19cb2e88925d3b360c37
README.md.html
README.md
Merlin is an editor service that provides modern IDE features for OCaml.
Emacs and Vim support is provided out-of-the-box. External contributors added support for Visual Studio Code, Sublime Text and Atom.
Easy installation with Opam
If you have a working Opam installation, Merlin is only two commands away:
opam install merlin
opam user-setup install
opam-user-setup takes care of configuring Emacs and Vim to make best use of your current install.
You can also configure the editor yourself, if you prefer.
Manually building and installing Merlin
Compilation
Dependencies: ocaml >= 4.02.3, ocamlfind, yojson >= 1.6.0, dune >= 1.8.
dune build -p merlin
Note: if you want to work on merlin, you'll want to avoid the -p merlin, to build in dev mode, with some extra warnings enabled. In that case you'll also need an extra dependency: menhir.
LSP
The LSP server has moved to its own project.
Installation
If you haven't encountered any errors in the previous step, just run:
$ dune install -p merlin
You can pass an explicit prefix to dune, using --prefix. It defaults to your current opam switch.
Editor setup
To setup Emacs and Vim, you need to instruct them to run the appropriate script when an OCaml file is opened.
In the rest of the document, <SHARE_DIR> refers to the directory where Merlin data files are installed.
It will usually be:
printed by the command
opam config var share, if you used opam"<prefix>/share" if you explicitly specified a prefix when configuring Merlin
Vim setup
Makes sure that ocamlmerlin binary can be found in PATH.
The only setup needed is to have the following directory in vim runtime path (append this to your .vimrc):
:set rtp+=<SHARE_DIR>/merlin/vim
The default configuration can be seen in:
<SHARE_DIR>/merlin/vim/plugin/merlin.vim
After adding merlin to vim runtime path, you will probably want to run :helptags <SHARE_DIR>/merlin/vim/doc to register Merlin documentation inside vim.
A more comprehensive documentation can be found on the vim-from-scratch wiki.
Emacs setup
Merlin comes with an emacs library (file: emacs/merlin.el) that implements a minor-mode that is supposed to be used on top of tuareg-mode.
All you need to do is add the following to your .emacs:
(push "<SHARE_DIR>/emacs/site-lisp" load-path) ; directory containing merlin.el
(setq merlin-command "<BIN_DIR>/ocamlmerlin") ; needed only if ocamlmerlin not already in your PATH
(autoload 'merlin-mode "merlin" "Merlin mode" t)
(add-hook 'tuareg-mode-hook 'merlin-mode)
(add-hook 'caml-mode-hook 'merlin-mode)
merlin-mode will make use of auto-complete-mode (available by package.el and the MELPA repository) if it is installed.
A more comprehensive documentation can be found on the emacs-from-scratch wiki.
Other editors
The wiki also contains pages for:
External contributors have implemented modes for more editors:
nuclide for Atom includes Merlin support
Next steps
To use Merlin with a multi-file project, it is necessary to have a .merlin file.
Read more in the wiki to learn how to make full use of Merlin in your projects.
Development of Merlin
Most of the development happens through the github page.
The mailing list welcomes general questions and discussions.
Merlin Labels
Area/Emacs: Related to Emacs
Area/Vim: Related to Vim
Kind/Bug: This issue describes a problem
Kind/Docs: This issue describes a documentation change
Kind/Feature-Request: Solving this issue requires implementing a new feature
Kind/To-discuss: Discussion needed to converge on a solution; often aesthetic. See mailing list for discussion
Status/0-More-info-needed: More information is needed before this issue can be triaged
Status/0-Triage: This issue needs triaging
Status/1-Acknowledged: This issue has been triaged and is being investigated
Status/2-Regression: Known workaround to be applied and tested
Status/3-Fixed-need-test: This issue has been fixed and needs checking
Status/4-Fixed: This issue has been fixed!
Status/5-Awaiting-feedback: This issue requires feedback on a previous fix
You can see current areas of development in our Merlin Project Roadmaps that we keep up to date.
Contributing to Merlin
Merlin needs your help and contributions!
Reporting Issues
When you encounter an issue, please report it with as much detail as possible. A thorough bug report is always appreciated :)
Check that our issue database doesn't already include that problem/suggestion. You can click "subscribe" on issues to follow their progress and updates.
When reporting issues, please include:
steps to reproduce the problem, if possible with some code triggering the issue,
version of the tools you are using: operating system, editor, OCaml.
Try to be as specific as possible:
avoid generic phrasing such as "doesn't work", explain why it is not working (editor is freezing, you got an error message, the answer is not what was expected, ...)
include the content of error messages.
If it seems relevant, also include information about your development environment:
the Opam version and switch in use,
other toolchains involved (OCaml flavors, cygwin, C compiler, shell, ...),
how the editor was setup.
Pull Requests
Found a bug and know how to fix it? Or have a feature you can implement directly? We appreciate pull requests to improve Merlin, and any significant fix should start life as an issue first.
Documentation and wiki
Help is greatly appreciated, the wiki needs love.
If the wiki didn't cover a topic and you found out the answer, updating the page or pointing out the issue will be very useful for future users.
Discussing with other Merlin users and contributors
Together with commenting on issues with direct feedback and relevant information, we use the mailing list to discuss ideas and current designs/implementations. User input helps us to converge on solutions, especially those for aesthetic and user-oriented topics.
List of Contributors
We would like to thank all people who contributed to Merlin.
Main collaborators:
Frédéric Bour, main developer
Thomas Refis, main developer
Gemma Gordon, project manager
Simon Castellan, contributed the initial Emacs mode
Contributors:
Sponsoring and donations
We would like to thank Jane Street for sponsoring and OCaml Labs for providing support and management.
And many thanks to our Bountysource backers.
Other acknowledgements
Distribution and configuration:
Louis Gesbert, opam-user-setup, out-of-the-box setup for Vim and Emacs
Edgar Aroutinian, ocaml-starterkit, collection of tools for beginners in OCaml
Support for other editors: