Check existing tf module versions (#466)

* Check existing module versions

* Pass version into script

* Add module name as script arg

* Change branch back to master

* Add GCP tf module check

Author: eversC

.circleci/check_tf_module_versions.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+set -e
+set -o pipefail
+
+VERSION=$1
+readonly VERSION
+MODULE_NAME=$2
+readonly MODULE_NAME
+
+
+REGISTRY_URL=$(curl --fail -sL "https://$TF_REGISTRY_HOST/.well-known/terraform.json" | jq -r '."modules.v1"')
+
+if [[ "$REGISTRY_URL" == "" ]]; then
+    echo "Failed to find registry API"
+    exit 2
+fi
+
+EXISTING_VERSION=$(curl "${REGISTRY_URL}${MODULE_NAME}/versions" | jq -c '.modules[0].versions[] | select(.version == '\""$VERSION"\"')')
+
+if [[ -n "$EXISTING_VERSION" ]]; then
+    echo "Version $VERSION already exists, skipping"
+    circleci-agent step halt
+fi

.circleci/config.yml

@@ -98,6 +98,10 @@ jobs:
     executor: terraform/terraform-0_12
     steps:
     - checkout
+    - run:
+        name: check_existing_version
+        command: |
+          .circleci/check_tf_module_versions.sh "$(<tf_module/ckr_aws/module_version.txt)" "pe/ckr/aws"
     - terraform/publish-module:
           path: tf_module/ckr_aws
           module_name: pe/ckr/aws
@@ -107,6 +111,10 @@ jobs:
     executor: terraform/terraform-0_12
     steps:
     - checkout
+    - run:
+        name: check_existing_version
+        command: |
+          .circleci/check_tf_module_versions.sh "$(<tf_module/ckr_gcp/module_version.txt)" "pe/ckr/gcp"
     - terraform/publish-module:
           path: tf_module/ckr_gcp
           module_name: pe/ckr/gcp