gnu: Add terraform-docs.

* gnu/packages/terraform.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

gnu/local.mk

@@ -411,6 +411,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/tcl.scm				\
   %D%/packages/telephony.scm			\
   %D%/packages/terminals.scm			\
+  %D%/packages/terraform.scm			\
   %D%/packages/texinfo.scm			\
   %D%/packages/tex.scm				\
   %D%/packages/textutils.scm			\

gnu/packages/terraform.scm

@@ -0,0 +1,52 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Christopher Baines <mail@cbaines.net>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix 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.
+;;;
+;;; GNU Guix 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 GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages terraform)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix build-system go)
+  #:use-module (gnu packages golang))
+
+(define-public terraform-docs
+  (package
+    (name "terraform-docs")
+    (version "0.3.0")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/segmentio/terraform-docs")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0xchpik32ab8m89s6jv671vswg8xhprfvh6s5md0zd36482d2nmm"))))
+    (build-system go-build-system)
+    (native-inputs
+     `(("go-github-com-hashicorp-hcl" ,go-github-com-hashicorp-hcl)
+       ("go-github-com-tj-docopt" ,go-github-com-tj-docopt)))
+    (arguments
+     '(#:import-path "github.com/segmentio/terraform-docs"))
+    (synopsis "Generate documentation from Terraform modules")
+    (description
+     "The @code{terraform-docs} utility can generate documentation describing
+the inputs and outputs for modules of the Terraform infrastructure management
+tool.  These can be shown, or written to a file in JSON or Markdown formats.")
+    (home-page "https://github.com/segmentio/terraform-docs")
+    (license license:expat)))