feat: nextls

bin/nextls

@@ -0,0 +1,14 @@
+#!/usr/bin/env -S elixir --sname undefined
+
+System.no_halt(true)
+
+Logger.configure(level: :none)
+
+Mix.start()
+Mix.shell(Mix.Shell.Process)
+
+Mix.install([{:next_ls, System.get_env("NEXTLS_VERSION")}])
+
+Logger.configure(level: :info)
+
+Application.ensure_all_started(:next_ls)

lua/elixir/init.lua

@@ -1,5 +1,6 @@
 local elixirls = require("elixir.elixirls")
 local credo = require("elixir.credo")
+local nextls = require("elixir.nextls")
 local mix = require("elixir.mix")
 local projectionist = require("elixir.projectionist")
 local utils = require("elixir.utils")
@@ -17,6 +18,13 @@ M.credo.default_bin = (
   vim.fn.fnamemodify(debug.getinfo(1).source, ":h") .. "/../../bin/credo-language-server"
 ):gsub("^@", "")
 
+M.nextls = {}
+
+M.nextls.default_bin = (vim.fn.fnamemodify(debug.getinfo(1).source, ":h") .. "/../../bin/nextls"):gsub(
+  "^@",
+  ""
+)
+
 local enabled = function(value)
   return value == nil or value == true
 end
@@ -26,6 +34,7 @@ function M.setup(opts)
 
   opts.elixirls = opts.elixirls or {}
   opts.credo = opts.credo or {}
+  opts.nextls = opts.nextls or {}
 
   if not opts.credo.cmd then
     opts.credo.cmd = M.credo.default_bin
@@ -35,6 +44,14 @@ function M.setup(opts)
     opts.credo.version = utils.latest_release("elixir-tools", "credo-language-server")
   end
 
+  if not opts.nextls.cmd then
+    opts.nextls.cmd = M.nextls.default_bin
+  end
+
+  if not opts.nextls.version then
+    opts.nextls.version = utils.latest_release("elixir-tools", "next-ls")
+  end
+
   mix.setup()
   projectionist.setup()
   if enabled(opts.elixirls.enable) then
@@ -43,6 +60,10 @@ function M.setup(opts)
   if enabled(opts.credo.enable) then
     credo.setup(opts.credo)
   end
+
+  if enabled(opts.nextls.enable) then
+    nextls.setup(opts.nextls)
+  end
 end
 
 return M

lua/elixir/nextls/init.lua

@@ -0,0 +1,45 @@
+local M = {}
+
+if not vim.uv then
+  vim.uv = vim.loop
+end
+
+function M.setup(opts)
+  local nextls_group = vim.api.nvim_create_augroup("elixir-tools.nextls", { clear = true })
+
+  vim.api.nvim_create_autocmd({ "FileType" }, {
+    group = nextls_group,
+    pattern = { "elixir" },
+    callback = function()
+      local matches = vim.fs.find({ "mix.lock" }, {
+        stop = vim.uv.os_homedir(),
+        upward = true,
+        path = vim.fs.dirname(vim.api.nvim_buf_get_name(0)),
+      })
+
+      local file = matches[1]
+
+      if file then
+        local cmd
+        if type(opts.port) == "number" then
+          cmd = vim.lsp.rpc.connect("127.0.0.1", opts.port)
+        else
+          cmd = { opts.cmd, "--stdio" }
+        end
+
+        vim.lsp.start {
+          name = "NextLS",
+          cmd = cmd,
+          cmd_env = {
+            NEXTLS_VERSION = opts.version,
+          },
+          settings = {},
+          root_dir = vim.fs.dirname(file),
+          on_attach = opts.on_attach or function() end,
+        }
+      end
+    end,
+  })
+end
+
+return M

lua/elixir/utils.lua

@@ -29,7 +29,7 @@ function M.latest_release(owner, repo)
   )
   local resp = vim.json.decode(vim.fn.system(curl))
 
-  return resp and resp.tag_name:gsub("^v", "") or nil
+  return resp and resp.tag_name and resp.tag_name:gsub("^v", "") or nil
 end
 
 return M