add python cache

.gitlab-ci.yml

@@ -5,6 +5,7 @@ variables:
   JACOCO_HTML_DIR: ${REPORTS_DIR}/jacoco/test/html
   JUNIT_FILES: build/test-results/test/TEST-*.xml
   REPORTS_DIR: build/reports
+  POETRY_CACHE_DIR: ${CI_PROJECT_DIR}/cache
   # TODO: Remove hard coded url
   S3_BUCKET: https://nshmp-netcdf-lp-development-rbucket-1of3d1x45yfd9.s3-us-west-2.amazonaws.com
   DATA_URL: ${S3_BUCKET}/nshmp_2018a_v1.1-CONUS-hazards-with-preliminary-PGV-fv0.3-1x1.nc
@@ -24,6 +25,7 @@ include:
 
 stages:
   - image
+  - init
   - build
   - database
   - deploy
@@ -41,7 +43,6 @@ stages:
 .python:
   before_script:
     - source $HOME/.poetry/env
-    - poetry install
   extends:
     - .tags::development
   image: ${PIPELINE_IMAGE_NAME}
@@ -122,6 +123,20 @@ Image:
   tags:
     - build
 
+
+####
+# Stage: init
+####
+
+Init:
+  artifacts:
+    paths:
+      - '${POETRY_CACHE_DIR}'
+  extends:
+    - .python
+  script:
+    - poetry install
+
 ####
 # Stage: build
 ####