neovim/runtime/doc/provider.txt

*provider.txt*		Nvim


		 NVIM REFERENCE MANUAL    by Thiago de Arruda


Providers	 						    *provider*

Nvim delegates some features to dynamic "providers".

				      Type <M-]> to see the table of contents.

==============================================================================
Python integration		    	      *provider-python*

Nvim supports the Vim legacy |python-vim| and |python3| interfaces via
external Python interpreters connected via |RPC|.
Note: Only the Vim 7.3 API is supported; bindeval (Vim 7.4) is not.

PYTHON QUICKSTART ~

If you used a package manager to install Nvim, you might already have the
required `neovim` Python package. Run |:CheckHealth| to see if your system is
up-to-date.

Following are steps to install the package with Python's `pip` tool.

Note: Depending on your system, `pip` might refer to Python 2 or Python 3,
      which is why the following instructions mention `pip2` or `pip3`
      explicitly. If one of these is not available, try `pip`.

To use Vim Python 2/3 plugins with Nvim:

- For Python 2 plugins, make sure an interpreter for Python 2.6 or 2.7 is
  available in your `$PATH`, then install the `neovim` Python package systemwide: >
    $ sudo pip2 install --upgrade neovim
<
  or for the current user: >
    $ pip2 install --user --upgrade neovim
<
- For Python 3 plugins, make sure an interpreter for Python 3.3 or above is
  available in your `$PATH`, then install the `neovim` Python package systemwide: >
    $ sudo pip3 install --upgrade neovim
<
  or for the current user: >
    $ pip3 install --user --upgrade neovim
<
Note: The `--upgrade` flag ensures you have the latest version even if
      a previous version was already installed.

PYTHON PROVIDER CONFIGURATION ~
						*g:python_host_prog*
						*g:python3_host_prog*
Program to use for evaluating Python code. Setting this makes startup faster.
Also useful for working with virtualenvs.  >
    let g:python_host_prog  = '/path/to/python'
    let g:python3_host_prog = '/path/to/python3'
<
						*g:loaded_python_provider*
To disable Python 2 support: >
    let g:loaded_python_provider = 1
<
						*g:loaded_python3_provider*
To disable Python 3 support: >
    let g:loaded_python3_provider = 1

PYTHON VIRTUALENVS ~

If you plan to use per-project virtualenvs often, you should assign
a virtualenv for Neovim and hard-code the interpreter path via
|g:python_host_prog| (or |g:python3_host_prog|) so that the "neovim" python
package is not required for each Environment. Example using pyenv: >
    pyenv install 3.4.4
    pyenv virtualenv 3.4.4 py3neovim
    pyenv activate py3neovim
    pip install neovim
    pyenv which python  # Note the path

The last command reports the interpreter path. Add it to your init.vim: >
    let g:python3_host_prog = '/full/path/to/py3neovim/bin/python'

More information:
https://github.com/zchee/deoplete-jedi/wiki/Setting-up-Python-for-Neovim

==============================================================================
Ruby integration		    	      *provider-ruby*

Nvim supports the Vim legacy |ruby-vim| interface via external Ruby
interpreters connected via |RPC|.

Run |:CheckHealth| to see if your system is up-to-date.

RUBY QUICKSTART ~

To use Vim Ruby plugins with Nvim, just install the latest `neovim` RubyGem: >
    $ gem install neovim

RUBY PROVIDER CONFIGURATION ~
						*g:loaded_ruby_provider*
To disable Ruby support: >
    let g:loaded_ruby_provider = 1
<
						*g:ruby_host_prog*
Command to start the Ruby host. By default this is `neovim-ruby-host`. For users
who use per-project Ruby versions with tools like RVM or rbenv, setting this can
prevent the need to install the `neovim` gem in every project.

To use an absolute path (e.g. to an rbenv installation): >
    let g:ruby_host_prog = '~/.rbenv/versions/2.4.1/bin/neovim-ruby-host'
<

To use the RVM "system" Ruby installation: >
    let g:ruby_host_prog = 'rvm system do neovim-ruby-host'
<

==============================================================================
Clipboard integration 			      *provider-clipboard* *clipboard*

Nvim has no direct connection to the system clipboard. Instead it is
accessible through a |provider| which transparently uses shell commands for
communicating with the clipboard.

Clipboard access is implicitly enabled if any of the following clipboard tools
are found in your `$PATH`.

  - xclip
  - xsel (newer alternative to xclip)
  - pbcopy/pbpaste (macOS)
  - lemonade (for SSH) https://github.com/pocke/lemonade
  - doitclient (for SSH) http://www.chiark.greenend.org.uk/~sgtatham/doit/

If you would like to configure the provider: >
    let g:clipboard = {
          \   'name': 'myClipboard',
          \   'copy': {
          \      '+': 'copyCommand',
          \      '*': 'copyCommand',
          \    },
          \   'paste': {
          \      '+': 'pasteCommand',
          \      '*': 'pasteCommand',
          \   },
          \   'cache_enabled': 1,
          \ }

If the cache is enabled, then when a selection is copied and the copy command
is executed, neovim will cache this selection until the copy command process
dies. Then, when pasting, if the copy command process has not died, the cached
selection is returned instead of executing the paste command.

The presence of a suitable clipboard tool implicitly enables the '+' and '*'
registers.

If you want to ALWAYS use the clipboard for ALL operations (as opposed
to interacting with the '+' and/or '*' registers explicitly), set the
following option:
>
    set clipboard+=unnamedplus
<
See 'clipboard' for details and more options.

==============================================================================
X11 selection mechanism			      *clipboard-x11* *x11-selection*

The clipboard providers for X11 store text in what is known as "selections".
Selections are "owned" by an application, so when the application is closed,
the selection text is lost.

The contents of selections are held by the originating application (e.g., upon
a copy), and only passed on to another application when that other application
asks for them (e.g., upon a paste).

							      *quoteplus* *quote+*

There are three documented X11 selections: `PRIMARY`, `SECONDARY`, and `CLIPBOARD`.
`CLIPBOARD` is typically used in X11 applications for copy/paste operations
(`Ctrl-c`/`v`), while `PRIMARY` is used for the last selected text, which is
generally inserted with the middle mouse button.

Nvim's X11 clipboard providers only utilize the `PRIMARY` and `CLIPBOARD`
selections, used for the '*' and '+' registers, respectively.

==============================================================================
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