Add epel prepare plugin using feature

tmt/cli.py

@@ -1643,6 +1643,9 @@ def init(
 @option(
     "-l", "--login", is_flag=True, default=False,
     help="Log into the guest only, do not run any tests.")
+@option(
+    "--epel", is_flag=True, default=False,
+    help="Enable epel repository.")
 @option(
     "-a", "--ask", is_flag=True, default=False,
     help="Just provision the guest and ask what to do next.")

tmt/steps/prepare/feature.py

@@ -88,6 +88,10 @@ def disable(self) -> None:
     }
 
 
+class _RawPrepareFeatureStepData(tmt.steps.prepare._RawPrepareStepData, total=False):
+    epel: str
+
+
 @dataclasses.dataclass
 class PrepareFeatureData(tmt.steps.prepare.PrepareStepData):
     epel: Optional[str] = field(

tmt/trying.py

@@ -19,6 +19,8 @@
 import tmt.templates
 import tmt.utils
 from tmt import Plan
+from tmt.steps.prepare import PreparePlugin
+from tmt.steps.prepare.feature import _RawPrepareFeatureStepData
 from tmt.utils import MetadataError, Path
 
 USER_PLAN_NAME = "/user/plan"
@@ -44,6 +46,7 @@ class Action(enum.Enum):
     START_LOGIN = "-", "jump directly to login after start"
     START_ASK = "-", "do nothing without first asking the user"
     START_TEST = "-", "start directly with executing detected tests"
+    START_CLI_OPTION = "-", "do requested cli option then ask the user"
 
     @property
     def key(self) -> str:
@@ -102,6 +105,7 @@ def __init__(
         self.tests: list[tmt.Test] = []
         self.plans: list[Plan] = []
         self.image_and_how = self.opt("image_and_how")
+        self.cli_options = ["epel"]
 
         # Use the verbosity level 3 unless user explicitly requested
         # a different level on the command line
@@ -295,6 +299,13 @@ def action_start_ask(self, plan: Plan) -> None:
 
         plan.provision.go()
 
+    def action_start_cli_option(self, plan: Plan) -> None:
+        """ Do requested cli option """
+        self.action_start(plan)
+
+        plan.provision.go()
+        plan.prepare.go()
+
     def action_test(self, plan: Plan) -> None:
         """ Test again """
         plan.discover.go(force=True)
@@ -388,6 +399,29 @@ def action_quit(self, plan: Plan) -> None:
         run_id = click.style(plan.my_run.workdir, fg="magenta")
         self.print(f"Run {run_id} successfully finished. Bye for now!")
 
+    def handle_options(self, plan: Plan) -> None:
+        """Choose requested cli option"""
+
+        option = [o for o in self.cli_options if self.opt(o)]
+        if not option:
+            return
+        getattr(self, f"handle_{option[0]}")(plan)
+
+    def handle_epel(self, plan: Plan) -> None:
+        """ Enable EPEL repository"""
+
+        # tmt run prepare --how feature --epel enabled
+        data: _RawPrepareFeatureStepData = {
+            "name": "prepare-tmt-try-epel",
+            'how': 'feature',
+            'epel': "enabled",
+            }
+
+        phase: PreparePlugin[Any] = cast(
+            PreparePlugin[Any], PreparePlugin.delegate(
+                plan.prepare, raw_data=data))
+        plan.prepare._phases.append(phase)
+
     def go(self) -> None:
         """ Run the interactive session """
 
@@ -403,13 +437,16 @@ def go(self) -> None:
 
         # Set the default verbosity level
         for plan in self.plans:
+            self.handle_options(plan)
             self.action_verbose(plan)
 
         # Choose the initial action
         if self.opt("login"):
             action = Action.START_LOGIN
         elif self.opt("ask"):
             action = Action.START_ASK
+        elif any(self.opt(o) for o in self.cli_options):
+            action = Action.START_CLI_OPTION
         elif self.tests:
             action = Action.START_TEST
         else: