Add el9toel10 actor to handle symlink -> directory with ruby IRB.

The `/usr/share/ruby/irb` path is a symlink in RHEL 9,
but a regular directory in RHEL 10.
This puts us back in line with RHEL 8 and Fedora in terms of the
path's file type regarding the rubygem-irb package.

Since this was not handled on RPM level, handle it as actor again.
This was copied and adjusted from same-named el8->el9 actor.

We do not care about the validity or target of the symlink, we just
remove it to allow DNF create the correct directory on upgrade.

Without this workaround, the upgrade will fail in transaction test with
reports of file conflicts on the directory path.

Users should not expect to ever retain anything in this directory.

repos/system_upgrade/el9toel10/actors/registerrubyirbadjustment/actor.py

@@ -0,0 +1,31 @@
+from leapp.actors import Actor
+from leapp.models import DNFWorkaround
+from leapp.tags import FactsPhaseTag, IPUWorkflowTag
+
+
+class RegisterRubyIRBAdjustment(Actor):
+    """
+    Register a workaround to allow rubygem-irb's symlink -> directory conversion.
+
+    The /usr/share/ruby/irb has been moved from a symlink to a directory
+    in RHEL 10 and this conversion was not handled on the RPM level.
+    This leads to DNF reporting package file conflicts when a major upgrade
+    is attempted and rubygem-irb is installed.
+
+    Register "handlerubyirbsymlink" script that removes the symlink prior
+    to DNF upgrade and allows it to create the expected directory in place of
+    the removed symlink.
+    """
+
+    name = 'register_ruby_irb_adjustment'
+    consumes = ()
+    produces = (DNFWorkaround,)
+    tags = (IPUWorkflowTag, FactsPhaseTag)
+
+    def process(self):
+        self.produce(
+            DNFWorkaround(
+                display_name='IRB directory fix',
+                script_path=self.get_tool_path('handlerubyirbsymlink'),
+            )
+        )

repos/system_upgrade/el9toel10/actors/registerrubyirbadjustment/tests/test_register_ruby_irb_adjustments.py

@@ -0,0 +1,11 @@
+import os.path
+
+from leapp.models import DNFWorkaround
+
+
+def test_register_ruby_irb_adjustments(current_actor_context):
+    current_actor_context.run()
+    assert len(current_actor_context.consume(DNFWorkaround)) == 1
+    assert current_actor_context.consume(DNFWorkaround)[0].display_name == 'IRB directory fix'
+    assert os.path.basename(current_actor_context.consume(DNFWorkaround)[0].script_path) == 'handlerubyirbsymlink'
+    assert os.path.exists(current_actor_context.consume(DNFWorkaround)[0].script_path)

repos/system_upgrade/el9toel10/tools/handlerubyirbsymlink

@@ -0,0 +1,22 @@
+#!/usr/bin/bash -e
+
+# just in case of hidden files.. not sure why would someone do that, it's more
+# like forgotten cache file possibility, but rather do that..
+shopt -s dotglob
+
+handle_dir() {
+    # Check that $1 is a symlink then unlink it so that RPM
+    # can freely create the directory.
+    if [ ! -L "$1" ]; then
+        return
+    fi
+
+    # There is no configuration or anything that the user should ever customize
+    # and expect to retain.
+    unlink "$1"
+
+    return 0
+}
+
+
+handle_dir /usr/share/ruby/irb