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plenary.nvim

All the lua functions I don't want to write twice.

plenary:

full; complete; entire; absolute; unqualified.

Note that this library is useless outside of Neovim since it requires Neovim functions. It should be usable with any recent version of Neovim though.

At the moment, it is very much in pre-alpha 😄 Expect changes to the way some functions are structured. I'm hoping to finish some document generators to provide better documentation for people to use and consume and then at some point we'll stabilize on a few more stable APIs.

Installation

Plug 'nvim-lua/plenary.nvim'

Modules

  • plenary.job
  • plenary.path
  • plenary.context_manager
  • plenary.test_harness
  • plenary.neorocks (This may move to packer.nvim, but I have added some improvements to use it more as a library.)

plenary.job

A Lua module to interactive with system processes. Pass in your command, the desired args, env and cwd. Define optional callbacks for on_stdout, on_stderr and on_exit and start your Job.

Note: Each job has an empty environment.

local Job = require'plenary.job'

Job:new({
  command = 'rg',
  args = { '--files' },
  cwd = '/usr/bin',
  env = { ['a'] = 'b' },
  on_exit = function(j, return_val)
    print(return_val)
    print(j:result())
  end,
}):sync() -- or start()

plenary.path

A Lua module that implements a bunch of the things from pathlib from Python, so that paths are easy to work with.

plenary.context_manager

Implements with and open just like in Python. For example:

local with = context_manager.with
local open = context_manager.open

local result = with(open("README.md"), function(reader)
  return reader:read()
end)

assert(result == "# plenary.nvim")

plenary.test_harness

Supports (simple) busted-style testing. It implements a mock-ed busted interface, that will allow you to run simple busted style tests in separate neovim instances.

To run the current spec file in a floating window, you can use the keymap <Plug>PlenaryTestFile. For example:

nmap <leader>t <Plug>PlenaryTestFile

To run a whole directory from the command line, you could do something like:

nvim --headless -c 'PlenaryBustedDirectory tests/plenary/ {minimal_init = "tests/minimal_init.vim"}'

Where the first argument is the directory you'd like to test. It will search for files with the pattern *_spec.lua and execute them in parallel in separate neovim instances.

The second argument is an optional init.vim to specify so that you can make reproducible tests!

The exit code is 0 when success and 1 when fail, so you can use it easily in a Makefile!

NOTE:

So far, the only supported busted items are:

  • describe
  • it
  • pending
  • assert.* etc. (from luassert, which is bundled)

OTHER NOTE:

We used to support luaunit and original busted but it turns out it was way too hard and not worthwhile for the difficulty of getting them setup, particularly on other platforms or in CI. Now, we have a dep free (or at least, no other installation steps necessary) busted implementation that can be used more easily.

Please take a look at the new APIs and make any issues for things that aren't clear. I am happy to fix them and make it work well :)

plenary.filetype

Will detect the filetype based on extension/special filename/shebang or modeline

  • require'plenary.filetype'.detect(filepath, opts) is a function that does all of above and exits as soon as a filetype is found
  • require'plenary.filetype'.detect_from_extension(filepath)
  • require'plenary.filetype'.detect_from_name(filepath)
  • require'plenary.filetype'.detect_from_modeline(filepath)
  • require'plenary.filetype'.detect_from_shebang(filepath)

Add filetypes by creating a new file named ~/.config/nvim/data/plenary/filetypes/foo.lua and register that file with :lua require'plenary.filetype'.add_file('foo'). Content of the file should look like that:

return {
  extension = {
    -- extension = filetype
    -- example:
    ['jl'] = 'julia',
  },
  file_name = {
    -- special filenames, likes .bashrc
    -- we provide a decent amount
    -- name = filetype
    -- example:
    ['.bashrc'] = 'bash',
  },
  shebang = {
    -- Shebangs are supported as well. Currently we provide
    -- sh, bash, zsh, python, perl with different prefixes like
    -- /usr/bin, /bin/, /usr/bin/env, /bin/env
    -- shebang = filetype
    -- example:
    ['/usr/bin/node'] = 'javascript',
  }
}

plenary.popup

popup_* clone of Vim's commands. If it gets good enough, will submit PR to Neovim and write C wrappers to provide compatibility layer for Neovim.

Status: WIP

plenary.window

Window helper functions to wrap some of the more difficult cases. Particularly for floating windows.

Status: WIP

Troubleshooting

If you're having trouble / things are hanging / other problems:

$ export DEBUG_PLENARY=true

This will enable debuggin for the plugin.

plenary.neorocks

Install lua packages with luarocks!

Include the following somewhere in your configuration (either heredoc or sourced lua file):

local neorocks = require("plenary.neorocks")

-- Installs neorocks if necessary and then installs the package you need.
--  Is not synchronous, so should be called from Neovim's command line most likely.
neorocks.install('penlight', 'pl')

-- ensure_installed(package_name, lua_name, headless)
-- Only installs if currently not installed.
--
--   package_name : str             - Name of the package for luarocks
--   lua_name     : (optional) str  - Name of the package that you can require. Used to determine if we have it installed already (not from luarocks)
neorocks.ensure_installed('penlight', 'pl')
neorocks.ensure_installed('lua-cjson', 'cjson')

Inspiration: https://github.com/theHamsta/nvim_rocks . However, I've used quite a different end goal (following XDG_CONFIG standards, using package.path and package.cpath to load the packages and a different strategy of loading).

Bundled with:

Currently comes bundled with slightly modified versions of:

And more to come :)

  • Floating window wrappers
  • Easy border windows to any floating window

Used by: