[ADD] prefer-env-translation: Add new check for translation

src/pylint_odoo/checkers/odoo_addons.py

@@ -264,6 +264,11 @@
         "deprecated-odoo-model-method",
         CHECK_DESCRIPTION,
     ),
+    "W8161": (
+        "Better using self.env._ for getting some performance improvement in some cases. More info at https://github.com/odoo/odoo/pull/174844",
+        "prefer-env-translation",
+        CHECK_DESCRIPTION,
+    ),
 }
 
 DFTL_MANIFEST_REQUIRED_KEYS = ["license"]
@@ -832,6 +837,7 @@ def _get_assignation_nodes(self, node):
         "translation-field",
         "translation-positional-used",
         "translation-required",
+        "prefer-env-translation",
     )
     def visit_call(self, node):
         if (
@@ -1009,6 +1015,17 @@ def visit_call(self, node):
                 # Check just the following cases "%s %s..."
                 self.add_message("translation-positional-used", node=node, args=(str2translate,))
 
+            # prefer-env-translation: recommend to translate a string (_) with self.env._
+            if (
+                isinstance(arg, nodes.Const)
+                and not isinstance(
+                    node.func, nodes.Attribute
+                )  # ensure it's not already called as attribute, e.g: self.env._()
+                and "fields" != self.get_func_lib(node.parent.func)
+                and self._is_instance_method(self.get_enclosing_function(node))
+            ):
+                self.add_message("prefer-env-translation", node=node)
+
         # SQL Injection
         if self._check_sql_injection_risky(node):
             self.add_message("sql-injection", node=node)
@@ -1044,6 +1061,11 @@ def visit_call(self, node):
                 if infer_node and infer_node.qname() == "itertools.groupby":
                     self.add_message("bad-builtin-groupby", node=node)
 
+    @staticmethod
+    def _is_instance_method(node: FunctionDef) -> bool:
+        parent = getattr(node, "parent", False)
+        return isinstance(parent, ClassDef) and ("_name" in parent.locals or "_inherit" in parent.locals)
+
     @utils.only_required_for_messages(
         "development-status-allowed",
         "license-allowed",

testing/resources/test_repo/eighteen_module/README.rst

@@ -0,0 +1 @@
+# Eighteen module for tests

testing/resources/test_repo/eighteen_module/__init__.py

@@ -0,0 +1,2 @@
+from . import models
+from . import utils

testing/resources/test_repo/eighteen_module/__manifest__.py

@@ -0,0 +1,12 @@
+{
+    "name": "Eighteen module for tests",
+    "license": "AGPL-3",
+    "author": "Odoo Community Association (OCA)",
+    "version": "18.0.1.0.0",
+    "depends": [
+        "base",
+    ],
+    "data": [
+        "security/ir.model.access.csv",
+    ],
+}

testing/resources/test_repo/eighteen_module/models.py

@@ -0,0 +1,14 @@
+from odoo import models, _, fields
+from odoo.exceptions import UserError
+
+
+class EighteenModel(models.Model):
+    _name = "eighteen.model"
+
+    name = fields.Char(_("Näme"))
+
+    def my_method7(self):
+        user_id = 1
+        if user_id != 99:
+            # Method with translation
+            raise UserError(_("String with translation"))

testing/resources/test_repo/eighteen_module/utils.py

@@ -0,0 +1,9 @@
+from odoo import exceptions, _
+
+
+def util_method():
+    raise exceptions.ValidationError(
+        _(
+            "The request to the service timed out. Please contact the author of the app.",
+        )
+    )

tests/test_main.py

@@ -472,6 +472,19 @@ def test_build_docstring(self):
             "The README was updated! Don't panic only failing for CI purposes. Run the same test again.",
         )
 
+    def test_gettext_env(self):
+        extra_params = ["--disable=all", "--enable=prefer-env-translation"]
+        test_repo = os.path.join(self.root_path_modules, "eighteen_module")
+
+        self.assertDictEqual(
+            self.run_pylint([test_repo], extra_params).linter.stats.by_msg,
+            {"prefer-env-translation": 1},
+        )
+
+        # This check is only valid for Odoo 18.0 and upwards
+        extra_params.append("--valid-odoo-versions=18.0")
+        self.assertTrue(self.run_pylint([test_repo], extra_params).linter.stats.by_msg)
+
 
 if __name__ == "__main__":
     unittest.main()