From d5a70c6b0355f247931f6be80b78a0ff1869c56f Mon Sep 17 00:00:00 2001
From: Cheryl Sabella <cheryl.sabella@gmail.com>
Date: Fri, 8 Mar 2019 17:01:27 -0500
Subject: [PATCH] bpo-35661: Store the venv prompt in pyvenv.cfg (GH-11440)

---
 Lib/test/test_venv.py                                       | 6 ++++++
 Lib/venv/__init__.py                                        | 2 ++
 .../next/Library/2019-01-05-16-16-20.bpo-35661.H_UOXc.rst   | 1 +
 3 files changed, 9 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2019-01-05-16-16-20.bpo-35661.H_UOXc.rst

diff --git a/Lib/test/test_venv.py b/Lib/test/test_venv.py
index 347544a6772..1ddec72927f 100644
--- a/Lib/test/test_venv.py
+++ b/Lib/test/test_venv.py
@@ -113,10 +113,16 @@ class BasicTest(BaseTest):
         builder = venv.EnvBuilder()
         context = builder.ensure_directories(self.env_dir)
         self.assertEqual(context.prompt, '(%s) ' % env_name)
+        builder.create(self.env_dir)
+        data = self.get_text_file_contents('pyvenv.cfg')
+        self.assertNotIn("prompt = ", data)
 
         builder = venv.EnvBuilder(prompt='My prompt')
         context = builder.ensure_directories(self.env_dir)
         self.assertEqual(context.prompt, '(My prompt) ')
+        builder.create(self.env_dir)
+        data = self.get_text_file_contents('pyvenv.cfg')
+        self.assertIn("prompt = 'My prompt'\n", data)
 
     @skipInVenv
     def test_prefixes(self):
diff --git a/Lib/venv/__init__.py b/Lib/venv/__init__.py
index d5ab38958bb..a309b861c5f 100644
--- a/Lib/venv/__init__.py
+++ b/Lib/venv/__init__.py
@@ -154,6 +154,8 @@ class EnvBuilder:
                 incl = 'false'
             f.write('include-system-site-packages = %s\n' % incl)
             f.write('version = %d.%d.%d\n' % sys.version_info[:3])
+            if self.prompt is not None:
+                f.write(f'prompt = {self.prompt!r}\n')
 
     def symlink_or_copy(self, src, dst, relative_symlinks_ok=False):
         """
diff --git a/Misc/NEWS.d/next/Library/2019-01-05-16-16-20.bpo-35661.H_UOXc.rst b/Misc/NEWS.d/next/Library/2019-01-05-16-16-20.bpo-35661.H_UOXc.rst
new file mode 100644
index 00000000000..43189868611
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-01-05-16-16-20.bpo-35661.H_UOXc.rst
@@ -0,0 +1 @@
+Store the venv prompt in pyvenv.cfg.