Major mode of Terraform configuration file

You can install terraform-mode.el from MELPA by package.el.

• Syntax highlighting
• Indentation
• imenu

Indentation size. You need to call revert-buffer if you change this value outer of hook such as eval-expression.

(custom-set-variables
 '(terraform-indent-level 4))

• hcl-mode

This major-mode inherits from hcl-mode. Most of syntax features, like highlighting, indentation are implemented in hcl-mode.