Allow deploying to arbitrary AWS environments

- Use a single deploy job in CircleCI with a regex filter
- Allow overriding the deploy env via command-line argument, otherwise
use $CIRCLE_BRANCH

Pushes to the 'production', 'staging', or branches matching 'deploy-*'
will be pushed to the corresponding AWS environment (this is determined
by the prefix you set in the poa-explorer-infra script)

.circleci/config.yml

@@ -141,7 +141,7 @@ jobs:
       - run: mix local.hex --force
 
       - run: mix credo
-  deploy_production:
+  deploy_aws:
     docker:
       # Ensure .tool-versions matches
       - image: circleci/elixir:1.6.4
@@ -157,28 +157,8 @@ jobs:
             - "c4:fd:a8:f8:48:a8:09:e5:3e:be:30:62:4d:6f:6f:36"
 
       - run:
-          name: Deploy Production to AWS
-          command: bin/deploy production
-
-  deploy_staging:
-    docker:
-      # Ensure .tool-versions matches
-      - image: circleci/elixir:1.6.4
-
-    working_directory: ~/app
-
-    steps:
-      - attach_workspace:
-          at: .
-
-      - add_ssh_keys:
-          fingerprints:
-            - "c4:fd:a8:f8:48:a8:09:e5:3e:be:30:62:4d:6f:6f:36"
-
-      - run:
-        name: Deploy Staging to AWS
-        command: bin/deploy staging
-
+          name: Deploy to AWS
+          command: bin/deploy
   dialyzer:
     docker:
       # Ensure .tool-versions matches
@@ -344,20 +324,13 @@ workflows:
       - credo:
           requires:
             - build
-      - deploy_production:
-          filters:
-            branches:
-              only: production
-          requires:
-            - check_formatted
-            - credo
-            - eslint
-            - sobelow
-            - test
-      - deploy_staging:
+      - deploy_aws:
           filters:
             branches:
-              only: master
+              only:
+                - production
+                - staging
+                - /deploy-[A-Za-z0-9]+$/
           requires:
             - check_formatted
             - credo

bin/deploy

@@ -62,12 +62,13 @@ function deploy_chain() {
 }
 
 # Make sure we got an environment as an argument to this script
-DEPLOY_ENV="$1"
+DEPLOY_ENV="${1:-$CIRCLE_BRANCH}"
 if [ -z "$DEPLOY_ENV" ]; then
-    error "Expected deployment environment as an argument, but none was provided!"
+    error "Expected deployment environment as an argument or via \$CIRCLE_BRANCH, but neither was provided!"
 fi
-# Convert it to uppercase for environment variable lookups
-DEPLOY_ENV="$(echo "$DEPLOY_ENV" | tr '[:lower:]' '[:upper:]')"
+# Strip deploy- prefix if one was set and convert it
+# to uppercase for environment variable lookups
+DEPLOY_ENV="$(echo "$DEPLOY_ENV" | sed -e 's/^deploy-//' | tr '[:lower:]' '[:upper:]')"
 
 log "Deploying to environment '${DEPLOY_ENV}'"