Minor refactoring for starters (kedro-org#3480)

* small refactor to keep parsing logic in one place

Signed-off-by: Nok <[email protected]>

* remove comments

Signed-off-by: Nok <[email protected]>

---------

Signed-off-by: Nok <[email protected]>

kedro/framework/cli/starters.py

@@ -511,16 +511,16 @@ def _get_extra_context( # noqa: PLR0913
 
  # Map the selected tools lists to readable name
  tools = extra_context.get("tools")
+ tools = _parse_tools_input(tools)
 
  # Check if no tools selected
- if not tools or tools.lower() == "none":
+ if not tools:
  extra_context["tools"] = str(["None"])
-
  else:
  extra_context["tools"] = str(
  [
  NUMBER_TO_TOOLS_NAME[tool]
- for tool in _parse_tools_input(tools) # type: ignore
+ for tool in tools # type: ignore
  ]
  )
 
@@ -777,7 +777,7 @@ def _validate_selection(tools: list[str]):
  sys.exit(1)
 
 
-def _parse_tools_input(tools_str: str):
+def _parse_tools_input(tools_str: None | str):
  """Parse the tools input string.
 
  Args:
@@ -793,14 +793,14 @@ def _validate_range(start, end):
  click.secho(message, fg="red", err=True)
  sys.exit(1)
 
+ if not tools_str:
+ return [] # pragma: no cover
+
  tools_str = tools_str.lower()
  if tools_str == "all":
  return list(NUMBER_TO_TOOLS_NAME)
  if tools_str == "none":
  return []
- # Guard clause if tools_str is None, which can happen if prompts.yml is removed
- if not tools_str:
- return [] # pragma: no cover
 
  # Split by comma
  tools_choices = tools_str.replace(" ", "").split(",")