Lsp Terraform (#1147)

* Start sketching out lsp client for terraform

This is rough, untested, and might not work at this point. Just bones.

* Client starting, package-versions

* Fix!

Append returns a new list; push modifies in place.

* Wire up `lsp-terraform` to `lsp-mode`

lsp-clients.el

@@ -44,6 +44,7 @@
 (require 'lsp-haxe)
 (require 'lsp-vhdl)
 (require 'lsp-yaml)
+(require 'lsp-terraform)
 
 ;;; Ada
 (defgroup lsp-ada nil

lsp-mode.el

@@ -627,7 +627,8 @@ Changes take effect only when a new session is started."
                                         (csharp-mode . "csharp")
                                         (plain-tex-mode . "plaintex")
                                         (latex-mode . "latex")
-                                        (vhdl-mode . "vhdl"))
+                                        (vhdl-mode . "vhdl")
+                                        (terraform-mode . "terraform"))
   "Language id configuration.")
 
 (defvar lsp-method-requirements

lsp-terraform.el

@@ -0,0 +1,62 @@
+;;; lsp-terraform.el --- Terraform Client settings         -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2019 Ross Donaldson
+
+;; Author: Ross Donaldson
+;; Keywords: terraform lsp
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; LSP client for Terraform
+
+;;; Code:
+
+(require 'lsp-mode)
+
+(defgroup lsp-terraform nil
+  "LSP support for Terraform, using terraform-lsp"
+  :group 'lsp-mode
+  :link '(url-link "https://github.com/juliosueiras/terraform-lsp")
+  :package-version `(lsp-mode . "6.2"))
+
+(defcustom lsp-terraform-server "terraform-lsp"
+  "Path to the `terraform-lsp' binary."
+  :group 'lsp-terraform
+  :risky t
+  :type 'file
+  :package-version `(lsp-mode . "6.2"))
+
+(defcustom lsp-terraform-enable-logging nil
+  "If non-nil, enable `terraform-ls''s native logging."
+  :group 'lsp-terraform
+  :risky t
+  :type 'boolean
+  :package-version `(lsp-mode . "6.2"))
+
+(defun lsp-terraform--make-launch-cmd ()
+  (-let [base `(,lsp-terraform-server)]
+    (if lsp-terraform-enable-logging
+        (push "-enable-log-file" base))
+    base))
+
+(lsp-register-client
+ (make-lsp-client :new-connection (lsp-stdio-connection #'lsp-terraform--make-launch-cmd)
+                  :major-modes '(terraform-mode)
+                  :priority -1
+                  :server-id 'tfls))
+
+(provide 'lsp-terraform)
+;;; lsp-terraform.el ends here