Added support for environment variables (#12)

* Although undocumented, `environment_variable` can take a list of
environment variables - hashicorp/terraform-provider-aws#5563

Author: Stretch96

README.md

@@ -151,6 +151,11 @@ The following variables can be configured:
 - **Description**: S3 bucket to store status badge and artifacts
 - **Default**: `"${var.namespace}"` (equal to namespace)
 
+#### `codebuild_environment_variables`
+- **Description**: CodeBuild Environment variables
+- **Deafult**: []
+- **Conflicts with**: `codebuild_project`
+
 ### Outputs
 
 The following outputs are exported:

main.tf

@@ -118,10 +118,11 @@ resource "aws_codebuild_project" "_" {
   }
 
   environment {
-    compute_type    = "${var.codebuild_compute_type}"
-    type            = "LINUX_CONTAINER"
-    image           = "${var.codebuild_image}"
-    privileged_mode = "${var.codebuild_privileged_mode}"
+    compute_type         = "${var.codebuild_compute_type}"
+    type                 = "LINUX_CONTAINER"
+    image                = "${var.codebuild_image}"
+    privileged_mode      = "${var.codebuild_privileged_mode}"
+    environment_variable = "${var.codebuild_environment_variables}"
   }
 
   artifacts {

variables.tf

@@ -92,6 +92,13 @@ variable "codebuild_bucket" {
   default     = ""
 }
 
+# var.codebuild_environment_variables
+variable "codebuild_environment_variables" {
+  description = "Environment variables to be used for build"
+  default     = []
+  type        = "list"
+  }
+
 # var.codebuild_badge_enabled
 variable "codebuild_badge_enabled" {
   description = "Generates a publicly-accessible URL for the projects build badge"