Use envsubst to replace env vars in gh actions

Author: pyropy

.github/workflows/ci.yml

@@ -29,11 +29,7 @@ jobs:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           preCommands: |
             cp wranger.toml.example wrangler.toml
-            echo "[env.production.vars]" >> wrangler.toml
-            echo "ENVIRONMENT = 'production'" >> wrangler.toml"
-            echo "INFLUX_URL = '${{ env.INFLUX_URL }}'" >> wrangler.toml
-            echo "INFLUX_METRIC_NAME = '${{ env.INFLUX_METRIC_NAME }}'" >> wrangler.toml
-            echo "INFLUX_DATABASE = '${{ env.INFLUX_DATABASE }}'" >> wrangler.toml
+            envsubst < wrangler.toml.example > wrangler.toml
           postCommands: |
             rm -f wrangler.toml
           environment: production

wrangler.toml.example

@@ -7,4 +7,10 @@ compatibility_flags = ["nodejs_compat"]
 ENVIRONMENT = "dev"
 INFLUX_METRIC_NAME = "example"
 INFLUX_URL = "http://localhost:8086"
-INFLUX_DATABASE = "example"
+INFLUX_DATABASE = "example"
+
+[env.dev.production]
+ENVIRONMENT = "production"
+INFLUX_METRIC_NAME = "$INFLUX_METRIC_NAME"
+INFLUX_URL = "$INFLUX_URL"
+INFLUX_DATABASE = "$INFLUX_DATABASE"