Add sumneko_lua installation and util.sh helper. (#49)

* Add sumneko_lua installation and util.sh helper.
* Add vspackage extraction for package.json information via vscode name.
* Allow specifying a tempdir at DOCGEN_TEMPDIR
* Fix on_new_config and add docs for root_dir
* User settings titles are not always useful

5 files changed, 170 insertions, 1 deletions

diff --git a/lua/nvim_lsp.lua b/lua/nvim_lsp.lua
index 2e00f079..1d5c35e0 100644
--- a/lua/nvim_lsp.lua
+++ b/lua/nvim_lsp.lua
@@ -2,8 +2,8 @@ local skeleton = require 'nvim_lsp/skeleton'
 
 require 'nvim_lsp/bashls'
 require 'nvim_lsp/ccls'
-require 'nvim_lsp/cssls'
 require 'nvim_lsp/clangd'
+require 'nvim_lsp/cssls'
 require 'nvim_lsp/elmls'
 require 'nvim_lsp/flow'
 require 'nvim_lsp/gopls'
@@ -11,6 +11,7 @@ require 'nvim_lsp/hie'
 require 'nvim_lsp/pyls'
 require 'nvim_lsp/rls'
 require 'nvim_lsp/solargraph'
+require 'nvim_lsp/sumneko_lua'
 require 'nvim_lsp/texlab'
 require 'nvim_lsp/tsserver'
 
diff --git a/lua/nvim_lsp/hie.lua b/lua/nvim_lsp/hie.lua
index dac2f7c8..cb18a164 100644
--- a/lua/nvim_lsp/hie.lua
+++ b/lua/nvim_lsp/hie.lua
@@ -12,6 +12,7 @@ skeleton.hie = {
   };
 
   docs = {
+    vscode = "alanz.vscode-hie-server";
     description = [[
 https://github.com/haskell/haskell-ide-engine
 
diff --git a/lua/nvim_lsp/rls.lua b/lua/nvim_lsp/rls.lua
index efecd34d..28067999 100644
--- a/lua/nvim_lsp/rls.lua
+++ b/lua/nvim_lsp/rls.lua
@@ -11,6 +11,7 @@ skeleton.rls = {
     settings = {};
   };
   docs = {
+    vscode = "rust-lang.rust";
     package_json = "https://github.com/rust-lang/rls-vscode/raw/master/package.json";
     description = [[
 https://github.com/rust-lang/rls
diff --git a/lua/nvim_lsp/sumneko_lua.lua b/lua/nvim_lsp/sumneko_lua.lua
new file mode 100644
index 00000000..365253cb
--- /dev/null
+++ b/lua/nvim_lsp/sumneko_lua.lua
@@ -0,0 +1,105 @@
+local skeleton = require 'nvim_lsp/skeleton'
+local util = require 'nvim_lsp/util'
+local vim = vim
+
+local name = "sumneko_lua"
+
+local function make_installer()
+  local P = util.path.join
+  local install_dir = P{util.base_install_dir, name}
+  local git_dir = P{install_dir, "lua-language-server"}
+
+  local bin = P{git_dir, "bin", "Linux", "lua-language-server"}
+  local main_file = P{git_dir, "main.lua"}
+  local cmd = {bin, '-E', main_file}
+
+  local X = {}
+  function X.install()
+    local install_info = X.info()
+    if install_info.is_installed then
+      print(name, "is already installed")
+      return
+    end
+    if not (util.has_bins("ninja") or util.has_bins("curl")) then
+      error('Need either "ninja" or "curl" (to download ninja) to install this.')
+      return
+    end
+    if not util.has_bins("sh", "chmod", "unzip") then
+      error('Need the binaries "sh", "chmod", "unzip" to install this')
+      return
+    end
+    local script = [=[
+set -e
+# Install ninja if not available.
+which ninja >/dev/null || {
+  test -x ninja || {
+    curl -LO https://github.com/ninja-build/ninja/releases/download/v1.9.0/ninja-linux.zip
+    unzip ninja-linux.zip
+    chmod +x ninja
+  }
+  export PATH=$PWD:$PATH
+}
+
+# clone project
+git clone https://github.com/sumneko/lua-language-server
+cd lua-language-server
+git submodule update --init --recursive
+
+# build
+cd 3rd/luamake
+ninja -f ninja/linux.ninja
+cd ../..
+./3rd/luamake/luamake rebuild
+    ]=]
+    vim.fn.mkdir(install_info.install_dir, "p")
+    util.sh(script, install_info.install_dir)
+  end
+  function X.info()
+    return {
+      is_installed = util.has_bins(bin);
+      install_dir = install_dir;
+      cmd = cmd;
+    }
+  end
+  function X.configure(config)
+    local install_info = X.info()
+    if install_info.is_installed then
+      config.cmd = cmd
+    end
+  end
+  return X
+end
+
+local installer = make_installer()
+
+skeleton[name] = {
+  default_config = {
+    filetypes = {'lua'};
+    root_dir = function(fname)
+      return util.find_git_ancestor(fname) or vim.loop.os_homedir()
+    end;
+    log_level = vim.lsp.protocol.MessageType.Warning;
+    settings = {};
+  };
+  on_new_config = function(config)
+    installer.configure(config)
+  end;
+  docs = {
+    vscode = "sumneko.lua";
+    description = [[
+https://github.com/sumneko/lua-language-server
+
+Lua language server. **By default, this doesn't have a `cmd` set.** This is
+because it doesn't provide a global binary. We provide an installer for Linux
+using `:LspInstall`.  If you wish to install it yourself, [here is a
+guide](https://github.com/sumneko/lua-language-server/wiki/Build-and-Run).
+]];
+    default_config = {
+      root_dir = [[root_pattern(".git") or os_homedir]];
+    };
+  };
+}
+
+skeleton[name].install = installer.install
+skeleton[name].install_info = installer.info
+-- vim:et ts=2
diff --git a/lua/nvim_lsp/util.lua b/lua/nvim_lsp/util.lua
index d015c932..0f96dd59 100644
--- a/lua/nvim_lsp/util.lua
+++ b/lua/nvim_lsp/util.lua
@@ -1,3 +1,4 @@
+local vim = vim
 local validate = vim.validate
 local api = vim.api
 local lsp = vim.lsp
@@ -361,6 +362,66 @@ function M.npm_installer(config)
   }
 end
 
+function M.sh(script, cwd)
+  api.nvim_command("10new")
+  assert(cwd and M.path.is_dir(cwd), "sh: Invalid directory")
+  local winnr = api.nvim_get_current_win()
+  local bufnr = api.nvim_get_current_buf()
+  local stdin = uv.new_pipe(false)
+  local stdout = uv.new_pipe(false)
+  local stderr = uv.new_pipe(false)
+  local handle, pid
+  handle, pid = uv.spawn("sh", {
+    stdio = {stdin, stdout, stderr};
+    cwd = cwd;
+  }, function()
+    stdin:close()
+    stdout:close()
+    stderr:close()
+    handle:close()
+    vim.schedule(function()
+      api.nvim_command("silent bwipeout! "..bufnr)
+    end)
+  end)
+
+  -- If the buffer closes, then kill our process.
+  api.nvim_buf_attach(bufnr, false, {
+    on_detach = function()
+      if not handle:is_closing() then
+        handle:kill(15)
+      end
+    end;
+  })
+
+  local output_buf = ''
+  local function update_chunk(err, chunk)
+    if chunk then
+      output_buf = output_buf..chunk
+      local lines = vim.split(output_buf, '\n', true)
+      api.nvim_buf_set_option(bufnr, "modifiable", true)
+      api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
+      api.nvim_buf_set_option(bufnr, "modifiable", false)
+      api.nvim_buf_set_option(bufnr, "modified", false)
+      if api.nvim_win_is_valid(winnr) then
+        api.nvim_win_set_cursor(winnr, {#lines, 0})
+      end
+    end
+  end
+  update_chunk = vim.schedule_wrap(update_chunk)
+  stdout:read_start(update_chunk)
+  stderr:read_start(update_chunk)
+  stdin:write(script)
+  stdin:write("\n")
+  stdin:shutdown()
+end
+
+function M.format_vspackage_url(extension_name)
+  local org, package = unpack(vim.split(extension_name, ".", true))
+  assert(org and package)
+  return string.format("https://marketplace.visualstudio.com/_apis/public/gallery/publishers/%s/vsextensions/%s/latest/vspackage", org, package)
+end
+
+
 function M.utf8_config(config)
   config.capabilities = config.capabilities or lsp.protocol.make_client_capabilities()
   config.capabilities.offsetEncoding = {"utf-8", "utf-16"}