### Install Plain Release Locally

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Install the built plain release to `~/.local/libexec/expert` and create a symlink for `start_expert` to `~/.local/bin/expert`. You can specify a different installation prefix using the `--prefix` flag.

```sh
just install
```

--------------------------------

### Elixir GenServer Module Example

Source: https://github.com/expert-lsp/expert/blob/main/pages/architecture.md

This example demonstrates a basic Elixir GenServer module. The `use GenServer` macro injects several functions, highlighting why compilation is necessary for Expert to accurately analyze and provide code intelligence features.

```elixir
defmodule SomeServer do
  use GenServer
end
```

--------------------------------

### Start Expert LSP Executable

Source: https://github.com/expert-lsp/expert/blob/main/pages/development.md

Point your editor's LSP configuration to this executable path in the generated release. It uses stdio for communication.

```sh
<your-repo>/apps/expert/_build/prod/rel/plain/bin/start_expert --stdio
```

--------------------------------

### Build Expert Release

Source: https://github.com/expert-lsp/expert/blob/main/pages/development.md

Run this command to build the release version of Expert. Ensure you have followed the installation instructions first.

```sh
just release
```

--------------------------------

### Start Expert with Stdio Transport

Source: https://github.com/expert-lsp/expert/blob/main/pages/architecture.md

Launches the Expert LSP server using standard input/output for communication. This is the default transport method.

```shell
expert --stdio
```

--------------------------------

### Neovim Configuration (0.11.3+)

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Utilize the built-in LSP configuration in Neovim version 0.11.3 and later for the Expert language server. This method simplifies setup for newer Neovim versions.

```lua
vim.lsp.config('expert', {
  cmd = { 'expert', '--stdio' },
  root_markers = { 'mix.exs', '.git' },
  filetypes = { 'elixir', 'eelixir', 'heex' },
})

vim.lsp.enable 'expert'
```

--------------------------------

### Add First Dependency to Mix Project

Source: https://github.com/expert-lsp/expert/blob/main/apps/forge/test/fixtures/umbrella/apps/first/README.md

Add the 'first' package to your project's dependencies in mix.exs to install it.

```elixir
def deps do
  [
    {:first, "~> 0.1.0"}
  ]
end
```

--------------------------------

### Vim-LSP-Settings Configuration

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Disable prompts to install elixir-ls when using Vim-LSP-Settings by setting the 'expert' server for Elixir filetypes.

```viml
g:lsp_settings_filetype_elixir = ["expert"]

```

--------------------------------

### Doom Emacs lsp-mode and elixir-mode Setup

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Configure Doom Emacs to use lsp-mode and elixir-mode. This involves updating the init.el and config.el files, followed by a doom sync.

```emacs-lisp
(doom!
       :tools
       ; (lsp +eglot)
       (lsp)
       
       :lang
       (elixir))
```

```emacs-lisp
(with-eval-after-load 'lsp-mode
  (add-to-list 'lsp-language-id-configuration
               '(elixir-mode . "elixir"))

  (lsp-register-client
   (make-lsp-client
    :new-connection (lsp-stdio-connection '("expert" "--stdio"))
    ; :major-modes '(elixir-mode)
    :priority -1
    :activation-fn (lsp-activate-on "elixir")
    :server-id 'expert))
  )

(add-hook 'elixir-mode-hook #'lsp)
```

--------------------------------

### Neovim Configuration (>= 0.9.0)

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Configure Expert as a custom LSP using lspconfig in Neovim versions 0.9.0 and above. This setup is compatible with various package managers.

```lua
require('lspconfig').lexical.setup {
  cmd = { "my/home/projects/expert/apps/expert/burrito_out/expert_linux_amd64", "--stdio" },
  root_dir = function(fname)
    return require('lspconfig').util.root_pattern("mix.exs", ".git")(fname) or vim.loop.cwd()
  end,
  filetypes = { "elixir", "eelixir", "heex" },
  -- optional settings
  settings = {}
}
```

--------------------------------

### Example Module and Function Definition

Source: https://github.com/expert-lsp/expert/blob/main/pages/architecture.md

Illustrates a basic Elixir module definition with a function. The indexer creates separate definition entries for the module and the function.

```elixir
defmodule MyApp.User do
  def new(x), do: x
end
```

--------------------------------

### Start Expert with TCP Transport

Source: https://github.com/expert-lsp/expert/blob/main/pages/architecture.md

Launches the Expert LSP server using a specified TCP port for communication. Replace `<port>` with the desired port number.

```shell
expert --port <port>
```

--------------------------------

### Vim-LSP Configuration with vim9script

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Configure Expert as the Elixir language server for Vim-LSP using vim9script. This example includes instructions for loading vim-lsp and registering the server.

```vim
# Loading vim-lsp with minpac:
call minpac#add("prabirshrestha/vim-lsp")
# ...or use your package manager of choice/Vim native packages

# Useful for debugging vim-lsp:
# g:lsp_log_verbose = 1
# g:lsp_log_file = expand('~/vim-lsp.log')

# Configure as the elixir language server
if executable("elixir")
    augroup lsp_expert
    autocmd!
    autocmd User lsp_setup call lsp#register_server({ name: "expert", cmd: (server_info) => "{{path_to_expert}}/expert/apps/expert/burrito_out/expert_linux_amd64", allowlist: ["elixir", "eelixir"] })
    autocmd FileType elixir setlocal omnifunc=lsp#complete
    autocmd FileType eelixir setlocal omnifunc=lsp#complete
    augroup end
endif

```

--------------------------------

### Clone Expert Repository

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Clone the Expert git repository to your local machine. Ensure you have Git LFS installed.

```sh
git clone git@github.com:expert-lsp/expert.git
```

--------------------------------

### Helix Configuration

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Add Expert as a language server in Helix by configuring the 'languages.toml' file. This setup is for Helix version 23.09 and above.

```toml
[language-server.expert]
command = "/my/home/projects/expert/apps/expert/burrito_out/expert_linux_amd64"
args = ["--stdio"]

[[language]]
name = "elixir"
language-servers = ["expert"]

[[language]]
name = "heex"
language-servers = ["expert"]

```

--------------------------------

### Add CompilationErrors to Mix Dependencies

Source: https://github.com/expert-lsp/expert/blob/main/apps/forge/test/fixtures/compilation_errors/README.md

To install the package, add `compilation_errors` to your `mix.exs` dependencies. This is the standard way to include Elixir packages in your project.

```elixir
def deps do
  [
    {:compilation_errors, "~> 0.1.0"}
  ]
end
```

--------------------------------

### Build Regular Release from Source

Source: https://github.com/expert-lsp/expert/blob/main/README.md

Run this command to build a regular release of Expert for your current system. The executable will be in the 'plain' release directory.

```bash
just release
```

--------------------------------

### Navigate to Expert Directory

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Change your current directory to the cloned Expert repository.

```sh
cd expert
```

--------------------------------

### Build Burrito Release

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Build the project as a burrito release. This will generate a binary named `expert_<os>_<arch>` in the `apps/expert/burrito_out` directory.

```sh
just burrito-local
```

--------------------------------

### Add Configuration to Mix Dependencies

Source: https://github.com/expert-lsp/expert/blob/main/apps/forge/test/fixtures/project_config/README.md

Add this to your `mix.exs` file to include the Configuration package.

```elixir
def deps do
  [
    {:configuration, "~> 0.1.0"}
  ]
end
```

--------------------------------

### Build Expert with Burrito

Source: https://github.com/expert-lsp/expert/blob/main/README.md

Build the Expert binary using the burrito method, which creates a release compatible with multiple systems. Requires Zig 0.15.2.

```bash
just burrito-local
```

--------------------------------

### Download Nightly Build with GH CLI

Source: https://github.com/expert-lsp/expert/blob/main/README.md

Use this command to download the latest nightly build of Expert for Linux AMD64 using the GitHub CLI.

```bash
gh release download nightly --pattern 'expert_linux_amd64' --repo expert-lsp/expert
```

--------------------------------

### Tail Expert Log Files

Source: https://github.com/expert-lsp/expert/blob/main/pages/development.md

While developing, tail both expert.log and project.log files in the .expert directory to monitor logs and OTP messages from the language server and project node.

```sh
tail -f .expert/*.log
```

--------------------------------

### Add Project Dependency to Mix.exs

Source: https://github.com/expert-lsp/expert/blob/main/apps/forge/test/fixtures/project/README.md

Include this snippet in your `mix.exs` file to add the Project library as a project dependency. Ensure the version number matches the latest release.

```elixir
def deps do
  [
    {:project, "~> 0.1.0"}
  ]
end
```

--------------------------------

### Neovim LSP Attach Callback for Expert Remote Shell

Source: https://github.com/expert-lsp/expert/blob/main/pages/development.md

This Lua code snippet configures Neovim's lsp-config to open a remote shell for the Expert LSP client when the 'connectionDetails' command is executed.

```lua
vim.api.nvim_create_autocmd("LspAttach", {
  group = vim.api.nvim_create_augroup("kickstart-lsp-attach", { clear = true }),

  callback = function(event)
    local client = vim.lsp.get_client_by_id(event.data.client_id)

    if client.name == "expert" then
      map("<leader>ed", function()
        client:request('workspace/executeCommand', {
          command = 'connectionDetails',
          arguments = {},
        }, function(err, result)
          if err then
            vim.notify('connectionDetails failed: ' .. vim.inspect(err), vim.log.levels.ERROR)
            return
          end

          vim.cmd('belowright split | terminal')
          vim.api.nvim_chan_send(vim.b.terminal_job_id, result.command .. '\n')
        end)
      end, "Expert remote shell")
    end
  end,
})

```

--------------------------------

### Emacs lsp-mode Configuration

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Configure lsp-mode and elixir-mode in Emacs using use-package. Ensure the elixir-mode is set to use the Expert server command.

```lisp
(use-package lsp-mode
  :ensure t
  :config
  (setq lsp-modeline-code-actions-segments '(count icon name))

  :init
  '(lsp-mode))


(use-package elixir-mode
  :ensure t
  :custom
  (lsp-elixir-server-command '("expert_linux_amd64" "--stdio")))
```

--------------------------------

### Add CompilationWarnings to Mix Dependencies

Source: https://github.com/expert-lsp/expert/blob/main/apps/forge/test/fixtures/compilation_warnings/README.md

Add this to your `mix.exs` file to include the compilation_warnings package in your project dependencies. Ensure the version is compatible.

```elixir
def deps do
  [
    {:compilation_warnings, "~> 0.1.0"}
  ]
end
```

--------------------------------

### Expert LSP Settings Schema

Source: https://github.com/expert-lsp/expert/blob/main/pages/configuration.md

Defines the structure and default values for Expert LSP configuration. Adjust these settings to control behavior like symbol search sensitivity and logging.

```json
{
  "workspaceSymbols": {
    "minQueryLength": 2
  },
  "logLevel": "info",
  "fileLogLevel": "info",
  "elixirSourcePath": "/path/to/elixir/source",
  "elixirExecutablePath": "/absolute/path/to/elixir",
  "erlangExecutablePath": "/absolute/path/to/erl"
}
```

--------------------------------

### Add ProjectMetadata Dependency to Mix.exs

Source: https://github.com/expert-lsp/expert/blob/main/apps/forge/test/fixtures/project_metadata/README.md

Add this to your `deps` function in `mix.exs` to include the ProjectMetadata package in your project.

```elixir
def deps do
  [
    {:project_metadata, "~> 0.1.0"}
  ]
end
```

--------------------------------

### Sublime Text LSP-Sublime Custom Client Configuration

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Configure Expert as a custom LSP client in Sublime Text using the LSP-Sublime package. This involves adding a client configuration to the LSP settings.

```json
"clients": {
  "elixir-expert": {
    "enabled": true,
    "command": ["/my/home/projects/expert/apps/expert/burrito_out/expert_linux_amd64", "--stdio"],
    "selector": "source.elixir"
  }
}

```

--------------------------------

### Add Second to Mix Dependencies

Source: https://github.com/expert-lsp/expert/blob/main/apps/forge/test/fixtures/umbrella/apps/second/README.md

Include this snippet in your `mix.exs` file to add the `second` package as a project dependency. Ensure the version constraint is appropriate for your project.

```elixir
def deps do
  [
    {:second, "~> 0.1.0"}
  ]
end
```

--------------------------------

### Expert LSP connectionDetails Command Response

Source: https://github.com/expert-lsp/expert/blob/main/pages/development.md

This JSON object contains the connection details required to attach a remote shell to a running Expert language server process.

```json
{
  "nodeName": "expert-manager-core-41110@127.0.0.1",
  "port": 59345,
  "cookie": "expert",
  "epmdModule": "Elixir.XPForge.EPMD",
  "epmdEbinPath": "/path/to/forge/ebin",
  "debugScriptPath": "/path/to/remote_shell.sh",
  "command": "'/path/to/remote_shell.sh' 'expert-manager-core-41110@127.0.0.1' '59345' 'Elixir.XPForge.EPMD' '/path/to/forge/ebin' 'expert'"
}
```

--------------------------------

### Configure Expert Language Server in Zed

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Update your Zed settings.json to enable Expert as the language server for Elixir. This configuration specifies the binary arguments and integrates Expert into the Elixir language server list.

```json
{
  "lsp": {
    "expert": {
      "binary": {
        "arguments": ["--stdio"]
      }
    }
  },
  "languages": {
    "Elixir": {
      "language_servers": [
        "expert",
        "!elixir-ls",
        "!next-ls",
        "!lexical",
        "..."
      ]
    }
  }
}
```

--------------------------------

### Spawn Remote Shell Command

Source: https://github.com/expert-lsp/expert/blob/main/pages/development.md

Use this command structure with the debugScriptPath and other details from the connectionDetails response to spawn a remote shell connected to the language server.

```sh
<debugScriptPath> <nodeName> <port> <epmdModule> <epmdEbinPath> [cookie]
```

--------------------------------

### Expert Credo Plugin Loaded Message

Source: https://github.com/expert-lsp/expert/blob/main/apps/expert_credo/README.md

When the Expert Credo plugin is successfully loaded, you will see this informational message in your project's `.expert/project.log` file. This confirms the plugin is active.

```text
info: Loaded [:expert_credo]
```

--------------------------------

### VS Code Expert Wrapper Script

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

A bash script to wrap the Expert executable, ensuring the --stdio flag is passed. This is useful for extensions like Lexical that do not support passing additional arguments.

```bash
#!/bin/bash
~/.local/bin/expert_linux_amd64 --stdio
```

--------------------------------

### Add Main to Mix Dependencies

Source: https://github.com/expert-lsp/expert/blob/main/apps/forge/test/fixtures/workspace_folders/main/README.md

Add the Main package to your project's dependencies in mix.exs. Ensure you are using a compatible version.

```elixir
def deps do
  [
    {:main, "~> 0.1.0"}
  ]
end
```

--------------------------------

### Build Expert Release with Elixir Parser

Source: https://github.com/expert-lsp/expert/blob/main/pages/development.md

Set the EXPERT_PARSER environment variable to 'elixir' when building the release to use the built-in Elixir parser instead of Spitfire.

```sh
EXPERT_PARSER=elixir just release
```

--------------------------------

### Add Secondary to Mix Dependencies

Source: https://github.com/expert-lsp/expert/blob/main/apps/forge/test/fixtures/workspace_folders/secondary/README.md

Add this to your `deps` function in `mix.exs` to include the Secondary package in your project.

```elixir
def deps do
  [
    {:secondary, "~> 0.1.0"}
  ]
end
```

--------------------------------

### Add Expert Credo as a Dev Dependency

Source: https://github.com/expert-lsp/expert/blob/main/apps/expert_credo/README.md

Add this to your `deps` function in `mix.exs` to include the expert_credo plugin as a development or test dependency. It's essential for expert to run code checks.

```elixir
def deps do
  [
    {:expert_credo, ">= 0.1.0", only: [:dev, :test]}
  ]
end
```

--------------------------------

### Emacs eglot Server Programs Configuration

Source: https://github.com/expert-lsp/expert/blob/main/pages/installation.md

Configure eglot to use Expert as the language server for Elixir and Heex modes. This configuration handles different operating systems and Emacs versions.

```emacs-lisp
(with-eval-after-load 'eglot
  (setf (alist-get '(elixir-mode elixir-ts-mode heex-ts-mode)
                   eglot-server-programs
                   nil nil #'equal)
        (if (and (fboundp 'w32-shell-dos-semantics)
                 (w32-shell-dos-semantics))
            '(("expert_windows_amd64" "--stdio"))
          (eglot-alternatives
           '(("expert_linux_amd64" "--stdio"))))))
```

```emacs-lisp
(with-eval-after-load 'eglot
  (setf (alist-get 'elixir-mode eglot-server-programs)
        (if (and (fboundp 'w32-shell-dos-semantics)
                 (w32-shell-dos-semantics))
            '(("expert_windows_amd64" "--stdio"))
          (eglot-alternatives
           '(("expert_linux_amd64" "--stdio"))))))
```

```emacs-lisp
(with-eval-after-load 'eglot
  (add-to-list 'eglot-server-programs
               `((elixir-ts-mode heex-ts-mode) .
                 ,(if (and (fboundp 'w32-shell-dos-semantics)
                           (w32-shell-dos-semantics))
                      '(("expert_windows_amd64" "--stdio"))
                    (eglot-alternatives
                     '(("expert_linux_amd64" "--stdio")))))))

```

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