terminal: disable OSC 9;4; terminal progress by default, except on Windows

Fix #13896.

Author: bluetech

changelog/13896.bugfix.rst

@@ -0,0 +1,3 @@
+The terminal progress feature added in pytest 9.0.0 has been disabled by default, except on Windows, due to compatibility issues with some terminal emulators.
+
+You may enable it again by passing ``-p terminalprogress``. We may enable it by default again once compatibility improves in the future.

doc/en/changelog.rst

@@ -178,6 +178,10 @@ New features
 
 
 - `#13072 <https://github.com/pytest-dev/pytest/issues/13072>`_: Added support for displaying test session **progress in the terminal tab** using the `OSC 9;4; <https://conemu.github.io/en/AnsiEscapeCodes.html#ConEmu_specific_OSC>`_ ANSI sequence.
+
+  **Note**: *This feature has been disabled by default in version 9.0.2, except on Windows, due to compatibility issues with some terminal emulators.
+  You may enable it again by passing* ``-p terminalprogress``. *We may enable it by default again once compatibility improves in the future.*
+
   When pytest runs in a supported terminal emulator like ConEmu, Gnome Terminal, Ptyxis, Windows Terminal, Kitty or Ghostty,
   you'll see the progress in the terminal tab or window,
   allowing you to monitor pytest's progress at a glance.

src/_pytest/config/__init__.py

@@ -303,6 +303,7 @@ def directory_arg(path: str, optname: str) -> str:
     *default_plugins,
     "pytester",
     "pytester_assertions",
+    "terminalprogress",
 }
 
 

src/_pytest/terminal.py

@@ -16,7 +16,6 @@
 import datetime
 from functools import partial
 import inspect
-import os
 from pathlib import Path
 import platform
 import sys
@@ -299,16 +298,10 @@ def mywriter(tags, args):
 
         config.trace.root.setprocessor("pytest:config", mywriter)
 
-    if reporter.isatty():
-        # Some terminals interpret OSC 9;4 as desktop notification,
-        # skip on those we know (#13896).
-        should_skip_terminal_progress = (
-            # iTerm2 (reported on version 3.6.5).
-            "ITERM_SESSION_ID" in os.environ
-        )
-        if not should_skip_terminal_progress:
-            plugin = TerminalProgressPlugin(reporter)
-            config.pluginmanager.register(plugin, "terminalprogress")
+    # See terminalprogress.py.
+    # On Windows it's safe to load by default.
+    if sys.platform == "win32":
+        config.pluginmanager.import_plugin("terminalprogress")
 
 
 def getreportopt(config: Config) -> str:

src/_pytest/terminalprogress.py

@@ -0,0 +1,28 @@
+# A plugin to register the TerminalProgressPlugin plugin.
+#
+# This plugin is not loaded by default due to compatibility issues (#13896),
+# but can be enabled in one of these ways:
+# - The terminal plugin enables it in a few cases where it's safe, and not
+#   blocked by the user (using e.g. `-p no:terminalprogress`).
+# - The user explicitly requests it, e.g. using `-p terminalprogress`.
+#
+# In a few years, if it's safe, we can consider enabling it by default. Then,
+# this file will become unnecessary and can be inlined into terminal.py.
+
+from __future__ import annotations
+
+from _pytest.config import Config
+from _pytest.config import hookimpl
+from _pytest.terminal import TerminalProgressPlugin
+from _pytest.terminal import TerminalReporter
+
+
+@hookimpl(trylast=True)
+def pytest_configure(config: Config) -> None:
+    reporter: TerminalReporter | None = config.pluginmanager.get_plugin(
+        "terminalreporter"
+    )
+
+    if reporter is not None and reporter.isatty():
+        plugin = TerminalProgressPlugin(reporter)
+        config.pluginmanager.register(plugin)

testing/test_terminal.py

@@ -3428,8 +3428,12 @@ def write_raw(s: str, *, flush: bool = False) -> None:
         tr._progress_nodeids_reported = set()
         return tr
 
+    @pytest.mark.skipif(sys.platform != "win32", reason="#13896")
     def test_plugin_registration(self, pytester: pytest.Pytester) -> None:
-        """Test that the plugin is registered correctly on TTY output."""
+        """Test that the plugin is registered correctly on TTY output.
+
+        Currently only registered automatically on Windows (#13896).
+        """
         # The plugin module should be registered as a default plugin.
         with patch.object(sys.stdout, "isatty", return_value=True):
             config = pytester.parseconfigure()