first commit

Author: snemetz

.gitignore

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+*.tfstate
+*.tfstate.backup
+.terraform

README.md

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+Terraform module to simplify and expand boolean use
+===
+
+Since Terraform currently doesn't have a boolean variable type, this provides a consistent handling. The list of true values is also expanded.
+
+Designed to simplify the use of booleans (especially where 1 variable is tested many times) and the using count to enable/disable resources.
+
+* Will handle any capitalization of the input value.
+* Will return 1 for any true value, 0 for anything else.
+* Current true values: true, t, 1, on, enable
+
+Example: If
+```hcl
+module "boolean" {
+  source  = "devops-workflow/boolean/local"
+  value   = "${var.boolean}"
+}
+
+var = "${module.boolean.value ? "true setting" : "false setting"}"
+```
+
+Example: count for enabling/disabling a resource
+```hcl
+module enabled" {
+  source  = "devops-workflow/boolean/local"
+  value   = "${var.enabled}"
+}
+
+resource "resource_type" "resource_name" {
+  count = "${module.enabled.value}"
+}
+```

main.tf

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+#
+# Terraform module to simplify and expand boolean use
+#
+
+locals {
+  l     = "${lower(var.value)}"
+  v1    = "${local.l == "true" ? 1 : 0}"
+  v2    = "${local.v1 ? 1 : local.l == "t" ? 1 : 0}"
+  v3    = "${local.v2 ? 1 : local.l == "1" ? 1 : 0}"
+  v4    = "${local.v3 ? 1 : local.l == "on" ? 1 : 0}"
+  v5    = "${local.v4 ? 1 : local.l == "enable" ? 1 : 0}"
+  value = "${local.v5}"
+}

outputs.tf

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+
+output "value" {
+  description = "1 if input was tested `true`, 0 otherwise"
+  value       = "${local.value}"
+}

test/README.md

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+Test cases
+===

test/main.tf

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+
+module "true" {
+  source  = "../"
+  value   = "true"
+}
+module "t" {
+  source  = "../"
+  value   = "t"
+}
+module "one" {
+  source  = "../"
+  value   = "1"
+}
+module "on" {
+  source  = "../"
+  value   = "on"
+}
+module "enable" {
+  source  = "../"
+  value   = "enable"
+}
+module "false" {
+  source  = "../"
+  value   = "false"
+}

test/outputs.tf

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+
+output "true" {
+  value   = "${module.true.value}"
+}
+output "t" {
+  value   = "${module.t.value}"
+}
+output "one" {
+  value   = "${module.one.value}"
+}
+output "on" {
+  value   = "${module.on.value}"
+}
+output "enable" {
+  value   = "${module.enable.value}"
+}
+output "false" {
+  value   = "${module.false.value}"
+}

variables.tf

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+variable "value" {
+  description = "Value to test for truth"
+  type        = "string"
+}