ci: Use semaphore to promote to production

#122: Deploy to separate GCP project

.semaphore/prod.yml

@@ -0,0 +1,27 @@
+---
+version: v1.0
+name: ISCO promotion
+agent:
+  machine:
+    type: e1-standard-2
+    os_image: ubuntu1804
+global_job_config:
+  secrets:
+    - name: isco
+  prologue:
+    commands:
+      - checkout
+      - export CI_COMMIT="${SEMAPHORE_GIT_SHA:0:7}"
+      - export CI_BRANCH="${SEMAPHORE_GIT_BRANCH}"
+      - export CI_TAG="${SEMAPHORE_GIT_TAG_NAME}"
+      - export CI_PULL_REQUEST="${SEMAPHORE_GIT_REF_TYPE/pull-request/true}"
+      - export CI_COMMIT_RANGE="${SEMAPHORE_GIT_COMMIT_RANGE}"
+      - export CLOUDSDK_CORE_DISABLE_PROMPTS=1
+      - export NO_PUSH=1
+blocks:
+  - name: 'Promotion'
+    task:
+      jobs:
+        - name: Promote to production
+          commands:
+            - ./ci/deploy.sh

.semaphore/semaphore.yml

@@ -48,11 +48,7 @@ blocks:
           commands:
             - ./ci/build.sh
             - ./ci/deploy.sh
+
+promotions:
   - name: "Promote to production"
-    run:
-      when: "tag =~ '.*'"
-    task:
-      jobs:
-        - name: Promote to production
-          commands:
-            - ./ci/deploy.sh
+    pipeline_file: prod.yml

ci/deploy.sh

@@ -83,7 +83,7 @@ set -x  # Renable it
 
 auth
 
-if [[ -z "${CI_TAG:=}" ]]; then
+if [[ -z "${CI_TAG:=}" && -z "${NO_PUSH}" ]] ; then
     push_image backend
     push_image frontend
 fi