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Dash.nvim

Query Dash.app within Neovim with your fuzzy finder!

The theme used in the recording is lighthaus.nvim.

Note: Dash is a Mac-only app, so you'll only find this plugin useful on Mac.

Install

This plugin must be loaded after your fuzzy finder plugin of choice. Currently supported fuzzy finder plugins are:

• telescope.nvim
• fzf-lua
• snap

After installing Dash.nvim, you must run make install. This can be done through a post-install hook with most plugin managers.

Packer:

use({
  'mrjones2014/dash.nvim',
  run = 'make install',
})

Paq:

require("paq")({
  { 'mrjones2014/dash.nvim', run = 'make install' };
})

Vim-Plug:

Plug 'mrjones2014/dash.nvim', { 'do': 'make install' }

Build From Source

If you prefer not to trust the binaries hosted in the repository, you can build from source. This requires installing the latest stable Rust toolchain from rustup.rs. Once you have the Rust toolchain set up, you can clone this repository, and run make build-local install. make build-local will auto-detect the host machine's architecture and build for that target, and make install will copy the binaries into you Lua runtime path. Once you've done this, you can install into Neovim by pointing your plugin manager to the local repository path on disk instead of mrjones2014/dash.nvim.

Usage

Run :h dash to see these docs in Neovim.

Editor Commands

This plugin has two editor commands, :Dash and :DashWord, each of which accept a bang (!). By default, it will search Dash.app with keywords based on config (see file_type_keywords in configuration). The bang (!) will search without this keyword filtering.

:Dash [query] will open the fuzzy finder, and if [query] is passed, it will pre-fill the prompt with [query]. This is essentially an alias to :lua require('dash').search(bang, [query]).

:DashWord will open the fuzzy finder and pre-fill the prompt with the word under the cursor. This is essentially an alias to :lua require('dash').search(bang, <cword>).

The Lua function require('dash').search() will bind to the first supported fuzzy finder plugin it detects. Having multiple fuzzy finder plugins installed will result in undefined behavior. You can use a specific fuzzy finder's provider directly via :lua require('dash.providers.telescope').dash({ bang = false, initial_text = '' }), for example.

If using Telescope, you can also run :Telescope dash search or :Telescope dash search_no_filter.

If using fzf-lua, you can also run :FzfLua dash or :lua require('fzf-lua').dash({ bang = false, initial_text = '' }).

If using Snap, you can also run :lua require('dash.providers.snap').dash({ bang = false, initial_text = '' }).

Configuration

Configuration Table Structure

{
  -- configure path to Dash.app if installed somewhere other than /Applications/Dash.app
  dash_app_path = '/Applications/Dash.app',
  -- search engine to fall back to when Dash has no results, must be one of: 'ddg', 'duckduckgo', 'startpage', 'google'
  search_engine = 'ddg',
  -- debounce while typing, in milliseconds
  debounce = 0,
  -- map filetype strings to the keywords you've configured for docsets in Dash
  -- setting to false will disable filtering by filetype for that filetype
  -- filetypes not included in this table will not filter the query by filetype
  -- check src/lua_bindings/dash_config_binding.rs to see all defaults
  -- the values you pass for file_type_keywords are merged with the defaults
  -- to disable filtering for all filetypes,
  -- set file_type_keywords = false
  file_type_keywords = {
    dashboard = false,
    NvimTree = false,
    TelescopePrompt = false,
    terminal = false,
    packer = false,
    fzf = false,
    -- a table of strings will search on multiple keywords
    javascript = { 'javascript', 'nodejs' },
    typescript = { 'typescript', 'javascript', 'nodejs' },
    typescriptreact = { 'typescript', 'javascript', 'react' },
    javascriptreact = { 'javascript', 'react' },
    -- you can also do a string, for example,
    -- sh = 'bash'
  },
}

If you notice an issue with the default config or would like a new file type added, please file an issue or submit a PR!

With Telescope

require('telescope').setup({
  extensions = {
    dash = {
      -- your config here
    }
  }
})

With fzf-lua or Snap

require('dash').setup({
  -- your config here
})

Lua API

The public API consists of two main functions.

-- See src/lua_bindings/dash_config_binding.rs for available config keys
-- Also described in configuration section below
---@param config
require('dash').setup(config)

--- This will bind to the first fuzzy finder it finds to be available,
--- checked in order: telescope, fzf-lua
---@param bang boolean @bang searches without any filtering
---@param initial_text string @pre-fill text into the finder prompt
require('dash').search(bang, initial_text)

See backend for documentation on the backend data provider.

Backend

To build from source, you will need a Rust toolchain, which can be installed from rustup.rs. Once this is installed, you should be able to build via make build. Then, make install will copy the correct binary into the lua/ directory so that it is added to Lua's runtimepath.

The Rust backend is exposed as a Lua module. To require the module, you will need to have the file libdash_nvim.so for your architecture (M1 or Intel) on your runtimepath, as well as the deps directory, which must be in the same directory as the libdash_nvim.so shared library file.

Constants

The Rust backend exports the following constants for use:

• require('libdash_nvim').DASH_APP_BASE_PATH => "/Applications/Dash.app"
• require('libdash_nvim).DASH_APP_CLI_PATH => "/Contents/Resources/dashAlfredWorkflow"

libdash_nvim.config (table)

This table stores the internal configuration. You can access it via require('libdash_nvim').config. See src/lua_bindings/dash_config_binding.rs or configuration above for configuration keys.

libdash_nvim.default_config (table)

This table stores the default configuration. You should not modify this table, treat it as read-only. This is mainly to help with merging your custom config with the default config, but can be useful for debugging purposes. For example:

:lua print(vim.inspect(require('libdash_nvim').default_config))

libdash_nvim.setup (function)

This method is used to set the internal configuration of the backend. It takes a table, which will be merged with the default configuration. See src/lua_bindings/dash_config_binding.rs or configuration above for configuration keys.

require('libdash_nvim').setup({
  -- your custom configuration here
})

libdash_nvim.query (function)

This method takes a table as its argument. The table should have the following keys:

• search_text - the search text entered by the user
• buffer_type - the current buffer type, this will be used to determine filter keywords from config
• ignore_keywords - disables filtering by keywords if true (e.g. if run with bang, :Dash! or :DashWord!)

local libdash = require('libdash_nvim')
local results = libdash.query({
  search_text = 'match arms',
  buffer_type = 'rust',
  ignore_keywords = false
})

The query method returns a table list of tables (a Rust Vec<DashItem> serialized to a Lua table, see src/dash_item.rs) with the following properties:

• value - the number value of the item, to be used when selected
• ordinal - a value to sort by, currently this is the same value as display
• display - a display value
• keyword - the keyword (if there was one) on the query that returned this result
• query - the full query that returned this result
• is_fallback - indicates whether the item represents a search engine fallback and should be handled as such

If no items are returned from querying Dash, it will return a single item with an extra key, is_fallback = true. The table will look something like the following:

{
  value = 'https://duckduckgo.com/?q=rust match arms',
  ordinal = '1',
  display = 'Search with DuckDuckGo: rust match arms',
  keyword = 'rust',
  query = 'rust:match arms',
  is_fallback = true,
}

libdash_nvim.open_item (function)

Takes an item returned from querying Dash via the require('libdash_nvim').query function and opens it in Dash.

local libdash = require('libdash_nvim')
local results = libdash.query({
  search_text = 'match arms',
  buffer_type = 'rust',
  ignore_keywords = false
})
local selected = results[1]
require('libdash_nvim').open_item(selected)

libdash_nvim.open_url (function)

Simply takes a URL string and opens it in the default browser/handler for the URL protocol. This is used for both opening the search engine fallback via an HTTPS URL, as well as opening the selected DashItem in Dash.app via the dash-workflow-callback:// URL protocol.

require('libdash_nvim').open_url('https://duckduckgo.com/?q=array.prototype.filter')
require('libdash_nvim').open_url('dash-workflow-callback://5')

Contributing

Git Hooks

If you plan on changing Rust code, you will need to install the git hooks via make install-hooks. The git hooks require you have a Rust toolchain installed. You can install a Rust toolchain from rustup.rs.

Developing Locally

The best way to develop and test locally is to install the plugin from a locally cloned repository. If you're using Packer, you can just do:

use({
  '~/git/dash.nvim', -- or whatever your local path is
  run = 'make install',
})

Otherwise you can add it manually via:

vim.opt.runtimepath:append('~/git/dash.nvim') -- or whatever your local path is

There is also a make dev task which will set the $DASH_NVIM_DEV environment variable and open nvim for you. When the $DASH_NVIM_DEV environment variable is set, there will be an extra command available, :DashDevReload. This will reload Telescope, fzf-lua, and Snap (whichever ones you have installed), as well as the dash and libdash_nvim Lua modules.

To recompile the Rust backend for your machine's CPU architecture and install the module, run make build-local install. make build-local will auto-detect your machine's architecture and build for that target, and make install will copy the compiled binaries into your Lua runtime path.

Running Tests

You can run all tests (both Rust and Lua) with make test.

Lua Tests

This uses busted, luassert (both through plenary.nvim) and matcher_combinators to define tests in spec/ directory. These dependencies are required only to run tests, that's why they are installed as git submodules.

To run Lua tests, run make test-lua. This runs tests in Neovim with a minimal profile, spec.vim. This runs Neovim with only this plugin, and the testing dependencies.

If you have entr(1) installed, you can run the tests in watch mode using make watch.

Rust Tests

Rust tests use built-in Rust assertions and test modules. To run Rust tests, run make test-rust.

Code Style

Use snake_case for everything. All Lua code should be checked and formatted with luacheck and stylua. Only presentation-layer code (such as providers for various fuzzy finder plugins) should be in the Lua code, any core functionality most likely belongs in the Rust backend.

All Rust code should be checked and formatted using rust-analyzer, and linted using clippy, which can be run via make lint-rust.