add dependency graph to repository

Makefile

@@ -7,6 +7,7 @@ major: NEXT_VERSION = $(shell echo $(LAST_TAG) | awk -F'[v.]' '{$$2++; print $$2
 
 patch minor major: graph
 	@if [ -z "${COMMITS}" ]; then echo "No new commits found after ${LAST_TAG}, aborting."; fi
+	@if [ -n "$(git ls-files -om graph.svg)" ]; then echo "Uncommited graph.svg detected, aborting."; fi
 	@if [ -n "${COMMITS}" ]; then git tag -s "v${NEXT_VERSION}" -m "Version ${NEXT_VERSION}"; fi
 
 release: check
@@ -17,4 +18,7 @@ release: check
 check:
 	@if ! which hub terraform dot > /dev/null; then echo "Missing dependency. Required: hub, terraform, dot." && exit 1; fi;
 
-.PHONY: patch minor major release check
+graph:
+	@terraform graph -module-depth=100 -draw-cycles | dot -Gsplines=ortho -Gconcentrate=true -Grankdir=RL -Tsvg > graph.svg
+
+.PHONY: patch minor major release check graph

README.md

@@ -14,7 +14,7 @@ See [`variables.tf`](variables.tf) for a list of configurable parameters.
 
 To include this module in your Terraform code-base, use the following snippet:
 
-```terraform
+```hcl
 module "dcos" {
   source = "github.com/jeanmertz/terraform-dcos"
 
@@ -36,9 +36,13 @@ instructions:
 
 * clone the repository
 * create a `terraform.tfvars` file with all the (required) variables
-* *optionslly* run `terraform plan -out terraform.plan`
+* *optionally* run `terraform plan -out terraform.plan`
 * run `terraform apply [terraform.plan]`
 
+## Dependency Graph
+
+[![graph](https://rawgit.com/JeanMertz/terraform-dcos/master/graph.svg)](graph.svg)
+
 ## Origin
 
 This module is an implementation of the official "Single Master"