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https://github.com/elixir-tools/elixir-tools.nvim

Neovim plugin for Elixir
https://github.com/elixir-tools/elixir-tools.nvim

elixir lua neovim plugin treesitter

Last synced: 11 days ago
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Neovim plugin for Elixir

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README 

        

# elixir-tools.nvim



# Overview



[![Discord](https://img.shields.io/badge/Discord-5865F3?style=flat&logo=discord&logoColor=white&link=https://discord.gg/nNDMwTJ8)](https://discord.gg/6XdGnxVA2A)

[![GitHub Discussions](https://img.shields.io/github/discussions/elixir-tools/discussions)](https://github.com/orgs/elixir-tools/discussions)



`elixir-tools.nvim` provides a nice experience for writing Elixir applications with [Neovim](https://github.com/neovim/neovim).



> **Note**

> This plugin does not provide autocompletion, I recommend using [nvim-cmp](https://github.com/hrsh7th/nvim-cmp).



> **Note**

> This plugin does not provide syntax highlighting, I recommend using [nvim-treesitter](https://github.com/nvim-treesitter/nvim-treesitter).



## Features



- [Next LS](https://github.com/elixir-tools/next-ls) installation and configuration.

- [Credo Language Server](https://github.com/elixir-tools/credo-language-server) installation and configuration.

- [ElixirLS](https://github.com/elixir-lsp/elixir-ls) installation and configuration.

- `:Mix` command with autocomplete

- [vim-projectionist](https://github.com/tpope/vim-projectionist) support



# Install



Requires 0.8



## lazy.nvim



```lua

{

  "elixir-tools/elixir-tools.nvim",

  version = "*",

  event = { "BufReadPre", "BufNewFile" },

  config = function()

    local elixir = require("elixir")

    local elixirls = require("elixir.elixirls")



    elixir.setup {

      nextls = {enable = true},

      credo = {},

      elixirls = {

        enable = true,

        settings = elixirls.settings {

          dialyzerEnabled = false,

          enableTestLenses = false,

        },

        on_attach = function(client, bufnr)

          vim.keymap.set("n", "fp", ":ElixirFromPipe", { buffer = true, noremap = true })

          vim.keymap.set("n", "tp", ":ElixirToPipe", { buffer = true, noremap = true })

          vim.keymap.set("v", "em", ":ElixirExpandMacro", { buffer = true, noremap = true })

        end,

      }

    }

  end,

  dependencies = {

    "nvim-lua/plenary.nvim",

  },

}

```



## packer.nvim



```lua

use({ "elixir-tools/elixir-tools.nvim", tag = "stable", requires = { "nvim-lua/plenary.nvim" }})

```



# Getting Started



## Minimal Setup



The minimal setup will configure both ElixirLS and credo-language-server.



```lua

require("elixir").setup()

```



Next LS, ElixirLS, and Credo Language Server can be enabled/disabled by setting the `enable` flag in the respective options table.



The defaults are shown below.



```lua

require("elixir").setup({

  nextls = {enable = false},

  credo = {enable = true},

  elixirls = {enable = true},

})

```



## Advanced Setup



While the plugin works with a minimal setup, it is much more useful if you add some personal configuration.



> **Note**

> For ElixirLS, not specifying the `repo`, `branch`, or `tag` options will default to the latest release.



```lua

local elixir = require("elixir")

local elixirls = require("elixir.elixirls")



elixir.setup {

  nextls = {

    enable = false, -- defaults to false

    port = 9000, -- connect via TCP with the given port. mutually exclusive with `cmd`. defaults to nil

    cmd = "path/to/next-ls", -- path to the executable. mutually exclusive with `port`

    init_options = {

      mix_env = "dev",

      mix_target = "host",

      experimental = {

        completions = {

          enable = false -- control if completions are enabled. defaults to false

        }

      }

    },

    on_attach = function(client, bufnr)

      -- custom keybinds

    end

  },

  credo = {

    enable = true, -- defaults to true

    port = 9000, -- connect via TCP with the given port. mutually exclusive with `cmd`. defaults to nil

    cmd = "path/to/credo-language-server", -- path to the executable. mutually exclusive with `port`

    version = "0.1.0-rc.3", -- version of credo-language-server to install and use. defaults to the latest release

    on_attach = function(client, bufnr)

      -- custom keybinds

    end

  },

  elixirls = {

    -- specify a repository and branch

    repo = "mhanberg/elixir-ls", -- defaults to elixir-lsp/elixir-ls

    branch = "mh/all-workspace-symbols", -- defaults to nil, just checkouts out the default branch, mutually exclusive with the `tag` option

    tag = "v0.14.6", -- defaults to nil, mutually exclusive with the `branch` option



    -- alternatively, point to an existing elixir-ls installation (optional)

    -- not currently supported by elixirls, but can be a table if you wish to pass other args `{"path/to/elixirls", "--foo"}`

    cmd = "/usr/local/bin/elixir-ls.sh",



    -- default settings, use the `settings` function to override settings

    settings = elixirls.settings {

      dialyzerEnabled = true,

      fetchDeps = false,

      enableTestLenses = false,

      suggestSpecs = false,

    },

    on_attach = function(client, bufnr)

      vim.keymap.set("n", "fp", ":ElixirFromPipe", { buffer = true, noremap = true })

      vim.keymap.set("n", "tp", ":ElixirToPipe", { buffer = true, noremap = true })

      vim.keymap.set("v", "em", ":ElixirExpandMacro", { buffer = true, noremap = true })

    end

  }

}

```



# Features



## Commands



:Elixir {command} [{subcommand}]



: The main elixir-tools command



      ```vim

      :Elixir nextls uninstall

      ```

### Full List



| Command | Subcommand     | Description                                                                                          |

|---------|----------------|------------------------------------------------------------------------------------------------------|

| nextls  | alias-refactor | Aliases the module under the cursor, refactoring similar calls as well                                |

| nextls  | to-pipe        | Extracts the first argument to a pipe call                                                           |

| nextls  | from-pipe      | Inlines the pipe call to a function call inlining the first argument                                 |

| nextls  | uninstall      | Removes the `nextls` executable from the default location: `~/.cache/elixir-tools/nextls/bin/nextls` |



## Next LS



> **Note**

> Next LS is **disabled** by default. Once it reaches feature parity with ElixirLS, it will switch to enabled by default.



> **Note**

> Next LS creates a `.elixir-tools` directory in your project root, but it's automatically ignored by git.



The language server for Elixir that just works. 😎



You can read more about it at https://www.elixir-tools.dev/next-ls.



### Automatic Installation



Next LS is distributed as pre-compiled binaries, which are available from the Next LS GitHub releases page. elixir-tools.nvim will prompt you to install it if it is not found, and then

will consequently download it from GitHub.



If you are using a package manager like [Mason](https://github.com/williamboman/mason.nvim), you can set the `cmd` property of the `nextls` setup table

and it will not prompt you to install and use it from there.



### Commands



Next LS command are available as subcommands of the `:Elixir` command



## Credo Language Server



> **Note**

> Credo Language Server integration utilizes `Mix.install/2`, so you must be running Elixir >= 1.12



> **Note**

> Credo Language Server creates a `.elixir-tools` directory in your project root. You'll want to add that to your gitignore.



- Uses your project's Credo version.

- Full project diagnostics

- Code Actions



## ElixirLS



### Automatic Installation



When a compatible installation of ElixirLS is not found, you will be prompted to install it. The plugin will download the source code to the `.elixir_ls` directory and compile it using the Elixir and OTP versions used by your current project.



Caveat: This assumes you are developing your project locally (outside of something like Docker) and they will be available.



Caveat: This currently downloads the language server into the `.elixir_ls` directory in your repository, but it does install it into `~/.cache` and will re-use it when needed.



![auto-install-elixirls](https://user-images.githubusercontent.com/5523984/160333851-94d448d9-5c80-458c-aa0d-4c81528dde8f.gif)



### Root Path Detection



`elixir-tools.nvim` should be able to properly set the root directory for umbrella and non-umbrella apps. The nvim-lspconfig project's root detection doesn't properly account for umbrella projects.



### Run Tests



ElixirLS provides a codelens to identify and run your tests. If you configure `enableTestLenses = true` in the settings table, you will see the codelens as virtual text in your editor and can run them with `vim.lsp.codelens.run()`.



![elixir-test-lens](https://user-images.githubusercontent.com/5523984/159722637-ef1586d5-9d47-4e1a-b68b-6a90ad744098.gif)



### Commands



:ElixirFromPipe



: Convert pipe operator to nested expressions.



:ElixirToPipe



: Convert nested expressions to the pipe operator.



![manipulate_pipes](https://user-images.githubusercontent.com/5523984/160508641-cedb6ebf-3ec4-4229-9708-aa360b15a2d5.gif)



:[range]ElixirExpandMacro



: For the given [range], expand any macros and display it in a floating window.



![expand_macro](https://user-images.githubusercontent.com/5523984/162372669-4782baba-1889-4145-8a4f-e3bf13a6450d.gif)



:ElixirRestart



: Restart ElixirLS, you must then reconnect your buffer with `:edit`.



:ElixirOutputPanel



: Open the output panel that displays logs and compiler information from the server.



```lua

require("elixir.elixirls").open_output_panel()

require("elixir.elixirls").open_output_panel({ window = "split" })

require("elixir.elixirls").open_output_panel({ window = "vsplit" })

require("elixir.elixirls").open_output_panel({ window = "float" })

```



## Mix



You can run any `mix` command in your project, complete with... autocomplete!



:Mix {args}



: Run any mix command.



![elixir-nvim-mix-demo](https://user-images.githubusercontent.com/5523984/181859468-19d47a55-3f63-4af5-8698-4b5dd3459141.gif)



## Projectionist



[vim-projectionist](https://github.com/tpope/vim-projectionist) integration!



:Esource {args}



: Create or edit a regular source module.



    ```vim

    Esource my_app/accounts/team

    ```



:Etest {args}



: Create or edit a regular test module.



    ```vim

    Etest my_app/accounts/team

    ```



:Etask {args}



: Create or edit a Mix task module.



    ```vim

    Etask server.start

    ```



:Econtroller {args}



: Create or edit a Phoenix controller module.



    ```vim

    Econtroller my_project_web/users

    ```



:Eview {args}



: Create or edit a Phoenix view module.



    ```vim

    Eview my_project_web/users

    ```



:Ehtml {args}



: Create or edit a Phoenix HTML module.



    ```vim

    Ehtml my_project_web/users

    ```



:Ejson {args}



: Create or edit a Phoenix JSON module.



    ```vim

    Ejson my_project_web/users

    ```



:Ecomponent {args}



: Create or edit a Phoenix.Component module.



    ```vim

    Ecomponent my_project_web/users

    ```



:Eliveview {args}



: Create or edit a Phoenix.LiveView module.



    ```vim

    Eliveview my_project_web/users

    ```



:Elivecomponent {args}



: Create or edit a Phoenix.LiveComponent module.



    ```vim

    Elivecomponent my_project_web/users

    ```



:Echannel {args}



: Create or edit a Phoenix channel module.



:Efeature {args}



: Create or edit a Wallaby test module.



## Contributing



### Setup



elixir-tools.nvim uses a combination of [Nix](https://nixos.org) and [just](https://github.com/casey/just) to provide the development tooling, but you can also install all of this manually.



#### Nix + just



```bash

# enter a nix shell, provides language deps and just

$ nix develop



# install test runner and plugin dependencies

$ just init



# run tests, optionally include the Neovim version to test

$ just test

$ just test 0.8.3



# format the code

$ just format

```



#### Manually



Install the following software:



- [Neovim](https://neovim.io)

- [Lua 5.1](https://sourceforge.net/projects/luabinaries/files/5.1.5/)

- [Luarocks](https://github.com/luarocks/luarocks/wiki/Download)

- [nvim-test](https://github.com/lewis6991/nvim-test)

- [plenary.nvim](https://github.com/nvim-lua/plenary.nvim) (into the folder "deps")

- [stylua](https://github.com/JohnnyMorganz/StyLua)



To run the tests, you can reference the commands run in the justfile