?? prompt should be wrapped in paranthesis ??

docs/changelog/2224.feature.rst

@@ -0,0 +1,3 @@
+The activated virtualenv prompt is now always wrapped in parentheses. This
+affects venvs created with the ``--prompt`` attribute, and matches virtualenv's
+behaviour on par with venv.

src/virtualenv/activation/bash/activate.sh

@@ -63,7 +63,7 @@ fi
 if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT-}" ] ; then
     _OLD_VIRTUAL_PS1="${PS1-}"
     if [ "x__VIRTUAL_PROMPT__" != x ] ; then
-        PS1="__VIRTUAL_PROMPT__${PS1-}"
+        PS1="(__VIRTUAL_PROMPT__) ${PS1-}"
     else
         PS1="(`basename \"$VIRTUAL_ENV\"`) ${PS1-}"
     fi

src/virtualenv/activation/batch/activate.bat

@@ -14,7 +14,7 @@ if defined _OLD_VIRTUAL_PROMPT (
 )
 if not defined VIRTUAL_ENV_DISABLE_PROMPT (
     if "__VIRTUAL_PROMPT__" NEQ "" (
-        set "PROMPT=__VIRTUAL_PROMPT__%PROMPT%"
+        set "PROMPT=(__VIRTUAL_PROMPT__) %PROMPT%"
     ) else (
         for %%d in ("%VIRTUAL_ENV%") do set "PROMPT=(%%~nxd) %PROMPT%"
     )

src/virtualenv/activation/cshell/activate.csh

@@ -18,7 +18,7 @@ setenv PATH "$VIRTUAL_ENV:q/__BIN_NAME__:$PATH:q"
 
 
 if ('__VIRTUAL_PROMPT__' != "") then
-    set env_name = '__VIRTUAL_PROMPT__'
+    set env_name = '(__VIRTUAL_PROMPT__) '
 else
     set env_name = '('"$VIRTUAL_ENV:t:q"') '
 endif

src/virtualenv/activation/fish/activate.fish

@@ -88,9 +88,9 @@ if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
         # Prompt override provided?
         # If not, just prepend the environment name.
         if test -n '__VIRTUAL_PROMPT__'
-            printf '%s%s' '__VIRTUAL_PROMPT__' (set_color normal)
+            printf '(%s) ' '__VIRTUAL_PROMPT__'
         else
-            printf '%s(%s) ' (set_color normal) (basename "$VIRTUAL_ENV")
+            printf '(%s) ' (basename "$VIRTUAL_ENV")
         end
 
         string join -- \n $prompt # handle multi-line prompts

src/virtualenv/activation/nushell/activate.nu

@@ -21,7 +21,7 @@ load-env $new-env
 
 # Creating the new prompt for the session
 let virtual_prompt = (if ("__VIRTUAL_PROMPT__" != "") {
-    "__VIRTUAL_PROMPT__"
+    "(__VIRTUAL_PROMPT__) "
 } {
     (build-string '(' ($virtual-env | path basename) ') ')
 }

src/virtualenv/activation/powershell/activate.ps1

@@ -46,7 +46,7 @@ if (!$env:VIRTUAL_ENV_DISABLE_PROMPT) {
         function global:prompt {
             # Add the custom prefix to the existing prompt
             $previous_prompt_value = & $function:_old_virtual_prompt
-            ("__VIRTUAL_PROMPT__" + $previous_prompt_value)
+            ("(__VIRTUAL_PROMPT__) " + $previous_prompt_value)
         }
     }
     else {

tests/conftest.py

@@ -301,7 +301,7 @@ def is_inside_ci():
 def special_char_name():
     base = "e-$ èрт🚒♞中片-j"
     # workaround for pypy3 https://bitbucket.org/pypy/pypy/issues/3147/venv-non-ascii-support-windows
-    encoding = "ascii" if IS_PYPY and IS_WIN else sys.getfilesystemencoding()
+    encoding = "ascii" if IS_WIN else sys.getfilesystemencoding()
     # let's not include characters that the file system cannot encode)
     result = ""
     for char in base:

tests/unit/activation/conftest.py

@@ -126,6 +126,7 @@ def _get_test_lines(self, activate_script):
             self.activate_call(activate_script),
             self.print_python_exe(),
             self.print_os_env_var("VIRTUAL_ENV"),
+            self.print_prompt(),
             # \\ loads documentation from the virtualenv site packages
             self.pydoc_call,
             self.deactivate,
@@ -143,7 +144,12 @@ def assert_output(self, out, raw, tmp_path):
         expected = self._creator.exe.parent / os.path.basename(sys.executable)
         assert self.norm_path(out[2]) == self.norm_path(expected), raw
         assert self.norm_path(out[3]) == self.norm_path(self._creator.dest).replace("\\\\", "\\"), raw
-        assert out[4] == "wrote pydoc_test.html", raw
+        # Some attempts to test the prompt output print more than 1 line.
+        # So we need to check if the prompt exists on any of them.
+        prompt_text = "({}) ".format(self._creator.env_name)
+        assert any(prompt_text in line for line in out[4:-3]), raw
+
+        assert out[-3] == "wrote pydoc_test.html", raw
         content = tmp_path / "pydoc_test.html"
         assert content.exists(), raw
         # post deactivation, same as before
@@ -172,6 +178,9 @@ def print_os_env_var(self, var):
             ),
         )
 
+    def print_prompt(self):
+        return NotImplemented
+
     def activate_call(self, script):
         cmd = self.quote(ensure_text(str(self.activate_cmd)))
         scr = self.quote(ensure_text(str(script)))

tests/unit/activation/test_bash.py

@@ -19,4 +19,7 @@ def __init__(self, session):
                 "You must source this script: $ source ",
             )
 
+        def print_prompt(self):
+            return self.print_os_env_var("PS1")
+
     activation_tester(Bash)

tests/unit/activation/test_batch.py

@@ -27,4 +27,7 @@ def quote(self, s):
             """double quotes needs to be single, and single need to be double"""
             return "".join(("'" if c == '"' else ('"' if c == "'" else c)) for c in pipes.quote(s))
 
+        def print_prompt(self):
+            return "echo %PROMPT%"
+
     activation_tester(Batch)

tests/unit/activation/test_csh.py

@@ -8,4 +8,7 @@ class Csh(activation_tester_class):
         def __init__(self, session):
             super(Csh, self).__init__(CShellActivator, session, "csh", "activate.csh", "csh")
 
+        def print_prompt(self):
+            return "echo 'source \"$VIRTUAL_ENV/bin/activate.csh\"; echo $prompt' | csh -i"
+
     activation_tester(Csh)

tests/unit/activation/test_fish.py

@@ -17,4 +17,7 @@ class Fish(activation_tester_class):
         def __init__(self, session):
             super(Fish, self).__init__(FishActivator, session, "fish", "activate.fish", "fish")
 
+        def print_prompt(self):
+            return "fish_prompt"
+
     activation_tester(Fish)

tests/unit/activation/test_nushell.py

@@ -23,4 +23,7 @@ def __init__(self, session):
 
             self.unix_line_ending = not IS_WIN
 
+        def print_prompt(self):
+            return r"echo $virtual_prompt; printf '\n'"
+
     activation_tester(Nushell)

tests/unit/activation/test_powershell.py

@@ -32,4 +32,7 @@ def _get_test_lines(self, activate_script):
         def invoke_script(self):
             return [self.cmd, "-File"]
 
+        def print_prompt(self):
+            return "prompt"
+
     activation_tester(PowerShell)