prometheus: require python 3.9.2, add uv.lock, try fix port in use flake

Author: daywalker90

prometheus/poetry.lock

@@ -1,7 +1,7 @@
 #!/usr/bin/env -S uv run --script
 
 # /// script
-# requires-python = ">=3.9"
+# requires-python = ">=3.9.2"
 # dependencies = [
 #   "prometheus-client>=0.20.0",
 #   "pyln-client>=24.5"

prometheus/prometheus.py

@@ -1,13 +1,25 @@
-[tool.poetry]
+[project]
 name = "prometheus"
 version = "0.1.0"
 description = "A plugin that reports metrics to be collected by prometheus"
-authors = ["Christian Decker <decker@blockstream.com>"]
-license = "MIT"
 readme = "README.md"
+authors = [{ name = "Christian Decker", email = "<decker@blockstream.io>" }]
+license = "MIT"
+requires-python = ">=3.9.2"
+dependencies = ["prometheus-client>=0.20.0", "pyln-client>=24.5"]
+
+[dependency-groups]
+dev = [
+    "pyln-testing>=24.5",
+    "pytest-rerunfailures>=10.3",
+    "pytest-timeout>=2.1.0",
+    "pytest-xdist>=3.1.0",
+]
+
+[tool.poetry]
 
 [tool.poetry.dependencies]
-python = "^3.9"
+python = "^3.9.2"
 prometheus-client = "^0.20.0"
 pyln-client = "^25.5"
 

prometheus/pyproject.toml

@@ -1,7 +1,6 @@
 import os
 from pyln.testing.fixtures import *  # noqa: F401,F403
 import urllib
-from ephemeral_port_reserve import reserve
 
 plugin_path = os.path.join(os.path.dirname(__file__), "prometheus.py")
 
@@ -21,13 +20,14 @@ def test_prometheus_starts(node_factory):
 def test_prometheus_scrape(node_factory):
     """Test that we can scrape correctly.
     """
-    l1 = node_factory.get_node(options={'plugin': plugin_path})
-    scrape = urllib.request.urlopen("http://localhost:9750")
+    port = node_factory.get_unused_port()
+    l1 = node_factory.get_node(options={'plugin': plugin_path, 'prometheus-listen': f'127.0.0.1:{port}'})
+    scrape = urllib.request.urlopen(f"http://localhost:{port}")
 
 
 
 def test_prometheus_channels(node_factory):
-    port = reserve()
+    port = node_factory.get_unused_port()
     l1, l2, l3 = node_factory.line_graph(
         3,
         opts=[