[WIP] [DEBUG] POC of custom modifications tracking

Please do NOT review until marked as ready.
All custom modifications ideas will be put there.

repos/system_upgrade/common/actors/trackcustommodifications/actor.py

@@ -0,0 +1,18 @@
+from leapp.actors import Actor
+from leapp.libraries.actor.trackcustommodifications import check_for_modifications
+from leapp.models import CustomModifications
+from leapp.reporting import Report
+from leapp.tags import ChecksPhaseTag, IPUWorkflowTag
+
+
+class TrackCustomModificationsActor(Actor):
+    """
+    Collects information about files in leapp directories that have been modified or newly added.
+    """
+
+    name = 'track_custom_modifications_actor'
+    produces = (CustomModifications, Report)
+    tags = (IPUWorkflowTag, ChecksPhaseTag)
+
+    def process(self):
+        check_for_modifications()

repos/system_upgrade/common/actors/trackcustommodifications/libraries/trackcustommodifications.py

@@ -0,0 +1,38 @@
+import os
+
+from leapp.libraries.common.config.version import get_source_major_version, get_target_major_version
+from leapp.libraries.stdlib import api, CalledProcessError, run
+from leapp.models import CustomModifications
+
+
+RPMS_TO_CHECK = ['leapp-upgrade-el{}toel{}'.format(get_source_major_version(), get_target_major_version())]
+DIRS_TO_SCAN = ['/usr/share/leapp-repository']
+
+
+def check_for_modifications(dirs=DIRS_TO_SCAN, rpms=RPMS_TO_CHECK):
+    """
+    This will return a tuple (changes, custom) is case any untypical files or changes to shipped leapp files are
+    discovered.
+    (None, None) means that no modifications have been found.
+    """
+    source_of_truth = []
+    for rpm in RPMS_TO_CHECK:
+        get_rpm_files_command = ['rpm', '-ql', rpm]
+        try:
+            rpm_files = run(get_rpm_files_command)
+            source_of_truth.append(rpm_files['stdout'].strip().split())
+        except CalledProcessError:
+            api.current_logger().warning(
+                'Could not get list of installed files from rpm %s'.format(rpm)
+            )
+            raise StopActorExecution()
+    leapp_files = []
+    for directory in dirs:
+        get_files_command = ['find', directory, '-type', 'f']
+        try:
+        except CalledProcessError:
+            api.current_logger().warning(
+            'Could not get list of leapp files in %s'.format(directory)
+            )
+            raise StopActorExecution()
+

repos/system_upgrade/common/models/custommodifications.py

@@ -0,0 +1,10 @@
+from leapp.models import fields, Model
+from leapp.topics import SystemFactsTopic
+
+
+class CustomModifications(Model):
+    """Model to store any custom\changed files that are discovered in leapp directories"""
+    topic = SystemFactsTopic
+
+    filename = fields.String()
+    actor_name = fields.String()