Add subcommand make-dashboard, for creating a Grafana Dashboard

CHANGES.md

@@ -7,6 +7,7 @@
 - Define MQTT and sensor configuration separately from implementation.
   The data logger uses a YAML file now, for example like `etc/mois.yaml`.
 - Added subcommand `make-config`, for creating a configuration blueprint
+- Added subcommand `make-dashboard`, for creating a Grafana Dashboard
 
 ## v0.0.2 - 2024-04-15
 - Publish as `ds18b20-datalogger` package

ds18b20_datalogger/cli.py

@@ -26,5 +26,8 @@ def main():
     elif subcommand == "make-config":
         config_template = files("ds18b20_datalogger") / "datalogger.yaml"
         print(config_template.read_text(), file=sys.stdout)  # noqa: T201
+    elif subcommand == "make-dashboard":
+        dashboard = files("ds18b20_datalogger") / "grafana-dashboard.json"
+        print(dashboard.read_text(), file=sys.stdout)  # noqa: T201
     else:
         raise ValueError(f"Subcommand unknown: {subcommand}")

tests/test_cli.py

@@ -1,3 +1,4 @@
+import json
 import subprocess
 import typing as t
 
@@ -28,3 +29,11 @@ def test_cli_make_config():
     config = yaml.safe_load(output)
     assert "mqtt" in config
     assert "one-wire" in config
+
+
+def test_cli_make_dashboard():
+    exitcode, output = invoke("ds18b20-datalogger make-dashboard")
+    dashboard = json.loads(output)
+    assert "annotations" in dashboard
+    assert "panels" in dashboard
+    assert "title" in dashboard