Initial typescript support (#8)

2 files changed, 110 insertions, 0 deletions

diff --git a/lua/nvim_lsp.lua b/lua/nvim_lsp.lua
index 4a6518f2..a2305eee 100644
--- a/lua/nvim_lsp.lua
+++ b/lua/nvim_lsp.lua
@@ -4,6 +4,7 @@ require 'nvim_lsp/elmls'
 require 'nvim_lsp/gopls'
 require 'nvim_lsp/pyls'
 require 'nvim_lsp/texlab'
+require 'nvim_lsp/tsserver'
 
 local M = {
   util = require 'nvim_lsp/util';
diff --git a/lua/nvim_lsp/tsserver.lua b/lua/nvim_lsp/tsserver.lua
new file mode 100644
index 00000000..e9f5031f
--- /dev/null
+++ b/lua/nvim_lsp/tsserver.lua
@@ -0,0 +1,109 @@
+local skeleton = require 'nvim_lsp/skeleton'
+local util = require 'nvim_lsp/util'
+local lsp = vim.lsp
+local fn = vim.fn
+local api = vim.api
+local need_bins = util.need_bins
+
+local default_capabilities = lsp.protocol.make_client_capabilities()
+default_capabilities.offsetEncoding = {"utf-8", "utf-16"}
+
+local bin_name = "typescript-language-server"
+
+local install_dir = util.path.join(fn.stdpath("cache"), "nvim_lsp", "typescript-language-server")
+
+local function get_install_info()
+  local bin_dir = util.path.join(install_dir, "node_modules", ".bin")
+  local bins = { bin_dir = bin_dir; install_dir = install_dir; }
+  bins.tsserver = util.path.join(bin_dir, bin_name)
+  bins.is_installed = need_bins(bins.tsserver)
+  return bins
+end
+
+local global_commands = {
+  TsServerInstall = {
+    function()
+      if get_install_info().is_installed then
+        return print('typescript-language-server is already installed')
+      end
+      skeleton.tsserver.install()
+    end;
+    description = 'Install typescript-language-server and its dependencies to stdpath("cache")/nvim_lsp/typescript-language-server';
+  };
+  TsServerInstallInfo = {
+    function()
+      local install_info = get_install_info()
+      if not install_info.is_installed then
+        return print('typescript-language-server is not installed')
+      end
+      print(vim.inspect(install_info))
+    end;
+    description = 'Print installation infor for `typescript-language-server`'
+  }
+};
+
+util.create_module_commands("typescript-language-server", global_commands)
+
+
+skeleton.tsserver = {
+  default_config = {
+    cmd = {bin_name};
+    filetypes = {"typescript", "typescriptreact", "typescript.tsx"};
+    root_dir = util.root_pattern("package.json");
+    log_level = lsp.protocol.MessageType.Warning;
+    settings = {};
+    capabilities = default_capabilities;
+    on_init = function(client, result)
+      if result.offsetEncoding then
+        client.offset_encoding = result.offsetEncoding
+      end
+    end
+  };
+  commands = global_commands;
+  on_new_config = function(new_config)
+    local install_info = get_install_info()
+    if install_info.is_installed then
+      new_config.cmd = {install_info.tsserver}
+    end
+  end;
+  docs = {
+    description = [[
+https://github.com/theia-ide/typescript-language-server
+
+typescript-language-server can be installed via `:TsServerInstall` or by yourself with `npm`: 
+```sh
+npm install -g typescript-language-server
+```
+]];
+    default_config = {
+      root_dir = [[root_pattern("package.json")]];
+      on_init = [[function to handle changing offsetEncoding]];
+      capabilities = [[default capabilities, with offsetEncoding utf-8]];
+    };
+  };
+}
+
+function skeleton.tsserver.install()
+  if not need_bins(bin_name) then return end
+  if not need_bins("sh", "npm", "mkdir", "cd") then
+    vim.api.nvim_err_writeln('Installation requires "sh", "npm", "mkdir", "cd"')
+    return
+  end
+  local install_info = get_install_info()
+  if install_info.is_installed then
+    return
+  end
+  local cmd = io.popen("sh", "w")
+  local install_script = ([[
+set -eo pipefail
+mkdir -p "{{install_dir}}"
+cd "{{install_dir}}"
+npm install typescript-language-server
+]]):gsub("{{(%S+)}}", install_info)
+  print(install_script)
+  cmd:write(install_script)
+  cmd:close()
+end
+
+skeleton.tsserver.get_install_info = get_install_info
+-- vim:et ts=2 sw=2