Create Environment does not check if .venv already exists

[brettcannon]

Type: Bug

Behaviour

Expected vs. Actual

If .venv already exists, ask the user whether they want to stick with it or delete it to create a new one. You can't have multiple environments in the same directory due to being able to only have a single pyvenv.cfg file.

Steps to reproduce:

1. Create an environment in .venv.
2. Launch the extension.
3. Run Create Environment to create an environment with a different Python version than what .venv already has.

Diagnostic data

• Python version (& distribution if applicable, e.g. Anaconda): 3.10.4
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Venv
• Value of the python.languageServer setting: Pylance

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

XXX

User Settings

languageServer: "Pylance"

linting
• enabled: false

formatting
• provider: "black"

testing
• autoTestDiscoverOnSaveEnabled: false

experiments
• optInto: ["All"]

Extension version: 2022.17.12871028
VS Code version: Code - Insiders 1.73.0-insider (7ef8e6b87a2a5a25ba1ef946bd1640ca3510956c, 2022-10-14T05:17:07.227Z)
OS version: Windows_NT x64 10.0.22621
Modes:
Sandboxed: Yes

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-8665U CPU @ 1.90GHz (8 x 2112)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off
Load (avg)	undefined
Memory (System)	15.75GB (3.74GB free)
Process Argv	C:\Users\brcan\OneDrive - Microsoft\Snippets\snippets.md --crash-reporter-id 2f8216b4-0af9-4bf4-a156-6cdcff01b0ab
Screen Reader	no
VM	0%

A/B Experiments

vsliv695:30137379
vsins829:30139715
vsliv368:30146709
vsreu685:30147344
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstes627:30244334
vslsvsres303:30308271
pythonvspyl392:30422396
pythontb:30258533
pythonptprofiler:30281269
vshan820:30294714
pythondataviewer:30285072
vscod805cf:30301675
bridge0708:30335490
bridge0723:30353136
cmake_vspar411:30581797
vsaa593cf:30376535
pythonvs932:30404738
cppdebug:30492333
vsclangdf:30492506
c4g48928:30535728
dsvsc012cf:30540253
pylantcb52:30590116
pyind367cf:30587848
vscccc:30564267
pyindex848:30577858
nodejswelcome1:30587009

[luabud]

#21829