Add cloudbuild tag config (#38)

cloudbuild-tag.yaml

@@ -0,0 +1,14 @@
+substitutions:
+  _STAGING_PROJECT_ID: null
+
+steps:
+- id: Pull Staging Image
+  name: gcr.io/cloud-builders/docker
+  args: ["pull", "gcr.io/$_STAGING_PROJECT_ID/mpdev:sha_$COMMIT_SHA"]
+- id: Tag Image
+  name: gcr.io/cloud-builders/docker
+  args: ["tag", "gcr.io/$_STAGING_PROJECT_ID/mpdev:sha_$COMMIT_SHA",
+      "gcr.io/$PROJECT_ID/mpdev:$TAG_NAME"]
+
+images:
+- gcr.io/$PROJECT_ID/mpdev:$TAG_NAME

cloudbuild.yaml

@@ -3,12 +3,12 @@ timeout: 1200s
 steps:
 - id: Docker build
   name: gcr.io/cloud-builders/docker
-  args: ['build', '.', '-t', 'gcr.io/$PROJECT_ID/mpdev', '--cache-from',
+  args: ['build', '.', '-t', 'gcr.io/$PROJECT_ID/mpdev:sha_$COMMIT_SHA', '--cache-from',
       'gcr.io/$PROJECT_ID/mpdev:latest']
 - id: Test mpdev apply
-  name: gcr.io/$PROJECT_ID/mpdev
+  name: gcr.io/$PROJECT_ID/mpdev:sha_$COMMIT_SHA
   args: ['apply', '-f', 'examples/deployment-manager/autogen/singlevm/configurations.yaml']
   env: ['MPDEV_TMP_DIR=/workspace']
 
 images:
-- 'gcr.io/$PROJECT_ID/mpdev'
+- 'gcr.io/$PROJECT_ID/mpdev:sha_$COMMIT_SHA'