Install python requirements during daily (#11486)

* install python requirements during daily

* Only check python 3

* ignore failures

composer.json

@@ -114,10 +114,14 @@
         "post-install-cmd": [
             "LibreNMS\\ComposerHelper::postInstall",
             "Illuminate\\Foundation\\ComposerScripts::postInstall",
-            "@php artisan vue-i18n:generate --multi-locales --format=umd"
+            "@php artisan vue-i18n:generate --multi-locales --format=umd",
+            "@python-requirements"
         ],
         "post-update-cmd": [
             "Illuminate\\Foundation\\ComposerScripts::postUpdate"
+        ],
+        "python-requirements": [
+            "scripts/check_requirements.py || pip3 install -r requirements.txt || :"
         ]
     }
 }

scripts/check_requirements.py

@@ -0,0 +1,18 @@
+#! /usr/bin/env python3
+import os
+import pkg_resources
+from pkg_resources import DistributionNotFound, VersionConflict
+
+target = os.path.realpath(os.path.dirname(__file__) + '/../requirements.txt')
+
+with open(target, 'r') as file:
+    requirements = file.read().rstrip().split("\n")
+    try:
+        pkg_resources.require(requirements)
+    except DistributionNotFound:
+        exit(1)
+    except VersionConflict:
+        exit(2)
+    exit(0)
+
+exit(3)