Adds testing Railway deployment to CI

.github/workflows/test-deploy.yaml

@@ -7,6 +7,8 @@ on:
       - ".github/**"
     branches:
       - main
+      # TODO: remove before merging this PR
+      - miho-railway-deployment-test-ci
     tags:
       - v*
   workflow_dispatch:
@@ -15,11 +17,12 @@ env:
   APP_PREFIX: ci-${{ github.sha }}
   FLY_API_TOKEN: ${{ secrets.FLY_GITHUB_TESTING_TOKEN }}
   FLY_REGION: mia
+  RAILWAY_API_TOKEN: ${{ secrets.RAILWAY_GITHUB_TESTING_TOKEN }}
   APP_TO_DEPLOY: waspc/examples/todoApp
 
 jobs:
   fly_deploy_app:
-    name: Deploy Wasp app
+    name: Deploy Wasp app to Fly.io
 
     runs-on: ubuntu-latest
 
@@ -79,7 +82,7 @@ jobs:
       server_hostname: ${{ steps.save_hostnames.outputs.server_hostname }}
       client_hostname: ${{ steps.save_hostnames.outputs.client_hostname }}
 
-  smoke_test_app:
+  fly_smoke_test_app:
     name: Run smoke tests on deployed app
 
     runs-on: ubuntu-latest
@@ -100,7 +103,7 @@ jobs:
   fly_destroy_app:
     runs-on: ubuntu-latest
     name: Clean up deployed Fly app
-    needs: [fly_deploy_app, smoke_test_app]
+    needs: [fly_deploy_app, fly_smoke_test_app]
     # NOTE: Fly deployments can sometimes "fail" but still deploy the apps. We
     # want to always clean them up.
     if: always()
@@ -119,3 +122,104 @@ jobs:
           flyctl apps destroy -y $APP_PREFIX-server || true
           flyctl apps destroy -y $APP_PREFIX-client || true
           flyctl apps destroy -y $APP_PREFIX-db || true
+
+  railway_deploy_app:
+    name: Deploy Wasp app to Railway
+
+    runs-on: ubuntu-latest
+
+    environment:
+      name: railway-deploy-test
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ./.github/actions/setup-haskell
+
+      - uses: actions/setup-node@v4
+        with:
+          cache: "npm"
+          node-version: "22"
+
+      - name: Install Wasp CLI
+        working-directory: waspc
+        run: ./run install
+
+      - name: Install Railway CLI
+        run: |
+          npm install -g @railway/cli
+
+      - name: Deploy App to Railway
+        working-directory: ${{ env.APP_TO_DEPLOY }}
+        run: |
+          set -e
+
+          # NOTE: This assumes env var values don't contain:
+          #   - The character `#`.
+          #   - An empty line (i.e., there are no multiline env values).
+          mapfile -t ENV_VAR_ARGUMENTS < <(
+            cat .env.server.example |
+            sed -E 's/#.*//' |
+            awk 'NF {$1=$1;print}' |
+            sed -E 's/^/--server-secret\n/'
+          )
+
+          echo "Deploying with prefix: $APP_PREFIX"
+          # NOTE:
+          # - We use a Bash array for `$ENV_VAR_ARGUMENTS` to ensure proper
+          # word splitting (i.e., force Bash to interpret the flags separately
+          # instead of passing it as a single string value).
+          echo $RAILWAY_API_TOKEN
+          RAILWAY_API_TOKEN=$RAILWAY_API_TOKEN wasp-cli deploy railway launch "$APP_PREFIX" --workspace wasp "${ENV_VAR_ARGUMENTS[@]}"
+
+      - name: Save deployed app hostnames
+        id: save_hostnames
+        working-directory: ${{ env.APP_TO_DEPLOY }}
+        run: |
+          server_service_name="${APP_PREFIX}-server"
+          client_service_name="${APP_PREFIX}-client"
+
+          echo "server_hostname=$(railway status --json | jq -r --arg NAME "$server_service_name" '.services.edges[] | select(.node.name == $NAME) | .node.serviceInstances.edges[0].node.domains.serviceDomains[0].domain')" >> "$GITHUB_OUTPUT"
+          echo "client_hostname=$(railway status --json | jq -r --arg NAME "$client_service_name" '.services.edges[] | select(.node.name == $NAME) | .node.serviceInstances.edges[0].node.domains.serviceDomains[0].domain')" >> "$GITHUB_OUTPUT"
+    outputs:
+      server_hostname: ${{ steps.save_hostnames.outputs.server_hostname }}
+      client_hostname: ${{ steps.save_hostnames.outputs.client_hostname }}
+
+  railway_smoke_test_app:
+    name: Run smoke tests on deployed app
+
+    runs-on: ubuntu-latest
+    needs: railway_deploy_app
+    env:
+      SERVER_HOSTNAME: ${{ needs.railway_deploy_app.outputs.server_hostname }}
+      CLIENT_HOSTNAME: ${{ needs.railway_deploy_app.outputs.client_hostname }}
+
+    steps:
+      - name: Smoke test the server
+        run: |
+          curl --fail --silent -X POST https://$SERVER_HOSTNAME/operations/get-date | jq '.json'
+
+      - name: Smoke test the client
+        run: |
+          curl --fail --silent https://$CLIENT_HOSTNAME | grep 'ToDo App'
+
+  railway_destroy_app:
+    runs-on: ubuntu-latest
+    name: Clean up deployed Railway app
+    needs: [railway_deploy_app, railway_smoke_test_app]
+    # NOTE: Fly deployments can sometimes "fail" but still deploy the apps. We
+    # want to always clean them up.
+    if: always()
+
+    steps:
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+
+      - name: Install Railway CLI
+        run: |
+          npm install -g @railway/cli
+
+      - name: Clean up testing app from Railway
+        run: |
+          echo "Not implemented yet, manually delete the project in Railway dashboard"