Add Support for Terraform Lint Checking (#34)

.travis.yml

@@ -16,3 +16,4 @@ install:
 script:
   - "make bash:lint"
   - "make make:lint"
+  - "make terraform:install"

README.md

@@ -37,7 +37,8 @@ Available targets:
   geodesic:deploy                     Run a Jenkins Job to Deploy $(APP) with $(CANONICAL_TAG)
   git:aliases-update                  Update git aliases
   git:submodules-update               Update submodules
-  github:download-release             Download release from github
+  github:download-private-release     Download release from github
+  github:download-public-release      Download release from github
   go:build                            Build binary
   go:build-all                        Build binary for all platforms
   go:clean                            Clean compiled binary
@@ -62,7 +63,12 @@ Available targets:
   help                                This help screen
   jenkins:run-job-with-tag            Run a Jenkins Job with $(TAG)
   make:lint                           Lint all makefiles
-  travis:docker-tag-and-push          Tag according travis envvars and push
+  terraform:get-modules               Ensure all modules can be fetched
+  terraform:get-plugins               Ensure all plugins can be fetched
+  terraform:lint                      Lint check Terraform
+  terraform:validate                  Basic terraform sanity check
+  travis:docker-login                 Login into docker hub
+  travis:docker-tag-and-push          Tag & Push according Travis environment variables
 ```
 
 
@@ -71,7 +77,7 @@ Available targets:
 - [`github-authorized-keys`](https://github.com/cloudposse/github-authorized-keys/) - A Golang project that leverages `docker:%`, `go:%`, `travis:%` targets
 - [`charts`](https://github.com/cloudposse/charts/) - A collection of Helm Charts that leverages `docker:%` and `helm:%` targets
 - [`bastion`](https://github.com/cloudposse/bastion/) - A docker image that leverages `docker:%` and `bash:lint` targets
-
+- [`terraform-null-label`](https://github.com/cloudposse/terraform-null-label/) - A terraform module that leverages `terraform:%` targets
 
 ## Help
 

modules/terraform/Makefile

@@ -0,0 +1,32 @@
+TMP ?= /tmp
+TERRAFORM ?= $(BUILD_HARNESS_PATH)/terraform
+TERRAFORM_VERSION ?= 0.10.7
+TERRAFORM_URL ?= https://releases.hashicorp.com/terraform/$(TERRAFORM_VERSION)/terraform_$(TERRAFORM_VERSION)_$(OS)_amd64.zip
+
+## Install terraform
+terraform\:install:
+	@[ -x $(TERRAFORM) ] || ( \
+		echo "Installing Terraform $(TERRAFORM_VERSION) ($(OS)) from $(TERRAFORM_URL)" && \
+		curl '-#' -fL -o $(TMP)/terraform.zip $(TERRAFORM_URL) && \
+		unzip -q -d $(TMP)/ $(TMP)/terraform.zip && \
+		mv $(TMP)/terraform $(TERRAFORM) && \
+		rm -f $(TMP)/terraform.zip \
+		)
+	$(TERRAFORM) version
+
+## Ensure all plugins can be fetched
+terraform\:get-plugins:
+	@$(TERRAFORM) init -get-plugins -backend=false -input=false >/dev/null
+
+## Ensure all modules can be fetched
+terraform\:get-modules:
+	@$(TERRAFORM) init -get -backend=false -input=false >/dev/null
+
+## Basic terraform sanity check
+terraform\:validate:
+	@$(TERRAFORM) validate -check-variables=false
+
+## Lint check Terraform
+terraform\:lint:
+	@FAIL=`$(TERRAFORM) fmt -write=false | xargs --no-run-if-empty -n 1 printf '\t- %s\n'`; \
+	[ -z "$$FAIL" ] || (echo "Terraform configuration needs linting. Run '$(TERRAFORM) fmt'"; echo $$FAIL; exit 1)