Revert "Remove support for custom lexers temporarily"

This reverts commit 598388a because it's no longer needed with questionary 1.7.0.

copier/config/user_data.py

@@ -11,7 +11,9 @@
 from iteration_utilities import deepflatten
 from jinja2 import UndefinedError
 from jinja2.sandbox import SandboxedEnvironment
+from prompt_toolkit.lexers import PygmentsLexer
 from pydantic import BaseModel, Field, validator
+from pygments.lexers.data import JsonLexer, YamlLexer
 from questionary import prompt
 from questionary.prompts.common import Choice
 from yamlinclude import YamlIncludeConstructor
@@ -206,6 +208,7 @@ def get_placeholder(self) -> str:
 
     def get_questionary_structure(self) -> AnyByStrDict:
         """Get the question in a format that the questionary lib understands."""
+        lexer = None
         result = {
             "default": self.get_default(for_rendering=True),
             "filter": self.filter_answer,
@@ -231,6 +234,12 @@ def get_questionary_structure(self) -> AnyByStrDict:
         if questionary_type == "input":
             if self.secret:
                 questionary_type = "password"
+            elif self.type_name == "yaml":
+                lexer = PygmentsLexer(YamlLexer)
+            elif self.type_name == "json":
+                lexer = PygmentsLexer(JsonLexer)
+            if lexer:
+                result["lexer"] = lexer
             result["multiline"] = self.get_multiline()
             placeholder = self.get_placeholder()
             if placeholder:

tests/test_prompt.py

@@ -1,12 +1,10 @@
-import inspect
 from pathlib import Path
 
 import pexpect
 import pytest
 import yaml
 from plumbum import local
 from plumbum.cmd import git
-from questionary.prompts.text import text
 
 from .helpers import COPIER_PATH, Keyboard, build_file_tree
 
@@ -247,13 +245,3 @@ def test_multiline(tmp_path_factory, spawn, type_):
             "question_4": ("answer 4"),
             "question_5": ("answer 5"),
         }
-
-
-def questionary_supports_custom_lexer():
-    """Check that questionary doesn't support custom lexers.
-
-    If this test fails, it means that https://github.com/tmbo/questionary/pull/70
-    was merged and then you should revert https://github.com/copier-org/copier/pull/289
-    to enable lexer support.
-    """
-    assert "lexer" not in inspect.signature(text).parameters