feat: improve interface to max:1,min:1 lists derived from TF schema

Signed-off-by: Marques Johansson <[email protected]>

Makefile

@@ -45,7 +45,7 @@ NPROCS ?= 1
 # to half the number of CPU cores.
 GO_TEST_PARALLEL := $(shell echo $$(( $(NPROCS) / 2 )))
 
-GO_STATIC_PACKAGES = $(GO_PROJECT)/cmd/provider
+GO_STATIC_PACKAGES = $(GO_PROJECT)/cmd/provider $(GO_PROJECT)/cmd/generator
 GO_LDFLAGS += -X $(GO_PROJECT)/internal/version.Version=$(VERSION)
 GO_SUBDIRS += cmd internal apis
 GO111MODULE = on
@@ -101,7 +101,7 @@ TERRAFORM_PROVIDER_SCHEMA := config/schema.json
 $(TERRAFORM):
 	@$(INFO) installing terraform $(HOSTOS)-$(HOSTARCH)
 	@mkdir -p $(TOOLS_HOST_DIR)/tmp-terraform
-	@curl -fsSL https://releases.hashicorp.com/terraform/$(TERRAFORM_VERSION)/terraform_$(TERRAFORM_VERSION)_$(SAFEHOST_PLATFORM).zip -o $(TOOLS_HOST_DIR)/tmp-terraform/terraform.zip
+	@curl -fsSL https://github.com/upbound/terraform/releases/download/v$(TERRAFORM_VERSION)/terraform_$(TERRAFORM_VERSION)_$(SAFEHOST_PLATFORM).zip -o $(TOOLS_HOST_DIR)/tmp-terraform/terraform.zip
 	@unzip $(TOOLS_HOST_DIR)/tmp-terraform/terraform.zip -d $(TOOLS_HOST_DIR)/tmp-terraform
 	@mv $(TOOLS_HOST_DIR)/tmp-terraform/terraform $(TERRAFORM)
 	@rm -fr $(TOOLS_HOST_DIR)/tmp-terraform