mark cli messages for translation

4 files changed, 33 insertions, 15 deletions

diff --git a/src/click/core.py b/src/click/core.py
index 80b1075..1b91af9 100644
--- a/src/click/core.py
+++ b/src/click/core.py
@@ -6,6 +6,7 @@ import typing as t
 from contextlib import contextmanager
 from contextlib import ExitStack
 from functools import update_wrapper
+from gettext import gettext as _
 from itertools import repeat
 
 from ._unicodefun import _verify_python_env
@@ -995,7 +996,7 @@ class BaseCommand:
         except Abort:
             if not standalone_mode:
                 raise
-            echo("Aborted!", file=sys.stderr)
+            echo(_("Aborted!"), file=sys.stderr)
             sys.exit(1)
 
     def _main_shell_completion(self, ctx_args, prog_name, complete_var=None):
@@ -1170,7 +1171,7 @@ class Command(BaseCommand):
             is_eager=True,
             expose_value=False,
             callback=show_help,
-            help="Show this message and exit.",
+            help=_("Show this message and exit."),
         )
 
     def make_parser(self, ctx):
@@ -1280,7 +1281,9 @@ class Command(BaseCommand):
         if self.deprecated:
             echo(
                 style(
-                    f"DeprecationWarning: The command {self.name!r} is deprecated.",
+                    _(
+                        "DeprecationWarning: The command {self.name!r} is deprecated."
+                    ).format(self=self),
                     fg="red",
                 ),
                 err=True,
diff --git a/src/click/decorators.py b/src/click/decorators.py
index 43c8fa2..13fb156 100644
--- a/src/click/decorators.py
+++ b/src/click/decorators.py
@@ -1,6 +1,7 @@
 import inspect
 import typing as t
 from functools import update_wrapper
+from gettext import gettext as _
 
 from .core import Argument
 from .core import Command
@@ -280,7 +281,7 @@ def version_option(
     *param_decls,
     package_name=None,
     prog_name=None,
-    message="%(prog)s, version %(version)s",
+    message=None,
     **kwargs,
 ):
     """Add a ``--version`` option which immediately prints the version
@@ -315,6 +316,9 @@ def version_option(
     .. versionchanged:: 8.0
         Use :mod:`importlib.metadata` instead of ``pkg_resources``.
     """
+    if message is None:
+        message = _("%(prog)s, version %(version)s")
+
     if version is None and package_name is None:
         frame = inspect.currentframe()
         f_globals = frame.f_back.f_globals if frame is not None else None
@@ -381,7 +385,7 @@ def version_option(
     kwargs.setdefault("is_flag", True)
     kwargs.setdefault("expose_value", False)
     kwargs.setdefault("is_eager", True)
-    kwargs.setdefault("help", "Show the version and exit.")
+    kwargs.setdefault("help", _("Show the version and exit."))
     kwargs["callback"] = callback
     return option(*param_decls, **kwargs)
 
@@ -412,6 +416,6 @@ def help_option(*param_decls, **kwargs):
     kwargs.setdefault("is_flag", True)
     kwargs.setdefault("expose_value", False)
     kwargs.setdefault("is_eager", True)
-    kwargs.setdefault("help", "Show this message and exit.")
+    kwargs.setdefault("help", _("Show this message and exit."))
     kwargs["callback"] = callback
     return option(*param_decls, **kwargs)
diff --git a/src/click/exceptions.py b/src/click/exceptions.py
index 9623cd8..81a1469 100644
--- a/src/click/exceptions.py
+++ b/src/click/exceptions.py
@@ -1,3 +1,5 @@
+from gettext import gettext as _
+
 from ._compat import filename_to_ui
 from ._compat import get_text_stderr
 from .utils import echo
@@ -28,7 +30,7 @@ class ClickException(Exception):
     def show(self, file=None):
         if file is None:
             file = get_text_stderr()
-        echo(f"Error: {self.format_message()}", file=file)
+        echo(_("Error: {self.format_message()}").format(self=self), file=file)
 
 
 class UsageError(ClickException):
@@ -59,8 +61,16 @@ class UsageError(ClickException):
             )
         if self.ctx is not None:
             color = self.ctx.color
-            echo(f"{self.ctx.get_usage()}\n{hint}", file=file, color=color)
-        echo(f"Error: {self.format_message()}", file=file, color=color)
+            echo(
+                _("{usage}\n{hint}").format(usage=self.ctx.get_usage(), hint=hint),
+                file=file,
+                color=color,
+            )
+        echo(
+            _("Error: {message}").format(message=self.format_message()),
+            file=file,
+            color=color,
+        )
 
 
 class BadParameter(UsageError):
@@ -144,7 +154,7 @@ class MissingParameter(BadParameter):
     def __str__(self):
         if self.message is None:
             param_name = self.param.name if self.param else None
-            return f"missing parameter: {param_name}"
+            return _("missing parameter: {param_name}").format(param_name=param_name)
         else:
             return self.message
 
diff --git a/src/click/termui.py b/src/click/termui.py
index 8342fde..72b03f8 100644
--- a/src/click/termui.py
+++ b/src/click/termui.py
@@ -4,6 +4,7 @@ import itertools
 import os
 import sys
 import typing as t
+from gettext import gettext as _
 
 from ._compat import is_bytes
 from ._compat import isatty
@@ -145,7 +146,7 @@ def prompt(
 
     if confirmation_prompt:
         if confirmation_prompt is True:
-            confirmation_prompt = "Repeat for confirmation"
+            confirmation_prompt = _("Repeat for confirmation")
 
         confirmation_prompt = _build_prompt(confirmation_prompt, prompt_suffix)
 
@@ -161,9 +162,9 @@ def prompt(
             result = value_proc(value)
         except UsageError as e:
             if hide_input:
-                echo("Error: the value you entered was invalid", err=err)
+                echo(_("Error: the value you entered was invalid"), err=err)
             else:
-                echo(f"Error: {e.message}", err=err)  # noqa: B306
+                echo(_("Error: {e.message}").format(e=e), err=err)  # noqa: B306
             continue
         if not confirmation_prompt:
             return result
@@ -173,7 +174,7 @@ def prompt(
                 break
         if value == value2:
             return result
-        echo("Error: the two entered values do not match", err=err)
+        echo(_("Error: the two entered values do not match"), err=err)
 
 
 def confirm(
@@ -222,7 +223,7 @@ def confirm(
         elif default is not None and value == "":
             rv = default
         else:
-            echo("Error: invalid input", err=err)
+            echo(_("Error: invalid input"), err=err)
             continue
         break
     if abort and not rv: