pythonTerminalEnvVarActivation not working with git bash on Windows

[schwaerz]

Type: Bug

Behaviour

When opening a Git Bash with a virtual python env supposed to be activated on Windows which "pythonTerminalEnvVarActivation" is enabled, it mostly won't work. It looks like there's an issue with the path translation. For me, I have the repositories located on c:\repositories. During path resolution it seems like the \r gets interpreted as a . echo $PATH will look like this : epositories/c/Users/schwaerz/home/bin:/mingw64/bin:/usr/local/bin:/usr/bin:/bin:/mingw64/bin:/usr/bin:/c/Users/schwaerz/home/bin

If I rename the c:\repositories folder, it still won't work as $PATH contains backslashes.

If I disable the experiment, the venv integration will work. However other plug-ins which need the integration (in my case: vsconan) will break.

Steps to reproduce:

1. Be sure that the pythonTerminalEnvVarActivation experiment is enabled (which is the default if telemetry is enabled)
2. Create some virtual python env in your workspace, e.g. in .venv
3. Select the venv python as python interpreter
4. Open a git bash (no need to have git bash be the default terminal)
5. Check echo $PATH and which python. It will be wrong / broken

Diagnostic data

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

2025-01-13 16:23:19.895 [info] Telemetry level is off
2025-01-13 16:23:19.895 [info] Experiments are disabled, only manually opted experiments are active.
2025-01-13 16:23:19.895 [info] Experiment 'pythonTerminalEnvVarActivation' is active
2025-01-13 16:23:19.895 [warning] Dir "c:\repositories\foo\.pixi\envs" is not watchable (directory does not exist)
2025-01-13 16:23:19.895 [info] Python interpreter path: .\.venv\Scripts\python.exe
2025-01-13 16:23:19.895 [info] > pyenv which python
2025-01-13 16:23:19.895 [info] cwd: .
2025-01-13 16:23:21.796 [info] > & ./.venv/Scripts/Activate.ps1 ; echo 'e8b39361-0157-4923-80e1-22d70d46dee6' ; python ~/.vscode/extensions/ms-python.python-2024.23.2025011301-win32-x64/python_files/printEnvVariables.py
2025-01-13 16:23:21.796 [info] shell: powershellCore
2025-01-13 16:23:22.449 [info] > ~\AppData\Local\Programs\Python\Python313\python.exe ~/.vscode/extensions/ms-python.python-2024.23.2025011301-win32-x64/python_files/printEnvVariables.py
2025-01-13 16:23:22.449 [info] shell: powershellCore
2025-01-13 16:23:22.605 [info] Starting Pylance language server.
2025-01-13 16:23:22.822 [info] Prepending environment variable PATH in collection with c:\Users\schwaerz\.vscode\extensions\ms-python.python-2024.23.2025011301-win32-x64\python_files\deactivate\powershell;C:\repositories\foo\.venv\Scripts; {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2025-01-13 16:23:22.822 [info] Setting environment variable VIRTUAL_ENV in collection to C:\repositories\foo\.venv {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2025-01-13 16:23:22.823 [info] Setting environment variable VIRTUAL_ENV_PROMPT in collection to .venv {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2025-01-13 16:23:22.823 [info] Send text to terminal: & C:/Users/schwaerz/AppData/Local/Programs/Python/Python313/python.exe c:\Users\schwaerz\.vscode\extensions\ms-python.python-2024.23.2025011301-win32-x64\python_files\printEnvVariablesToFile.py c:\Users\schwaerz\.vscode\extensions\ms-python.python-2024.23.2025011301-win32-x64\python_files\deactivate\powershell\envVars.txt
2025-01-13 16:23:35.760 [info] Shell integration status changed, can confirm it's working.
2025-01-13 16:23:35.761 [info] Prepending environment variable PATH in collection with c:\Users\schwaerz\.vscode\extensions\ms-python.python-2024.23.2025011301-win32-x64\python_files\deactivate\powershell;C:\repositories\foo\.venv\Scripts; {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2025-01-13 16:23:35.761 [info] Setting environment variable VIRTUAL_ENV in collection to C:\repositories\foo\.venv {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2025-01-13 16:23:35.761 [info] Setting environment variable VIRTUAL_ENV_PROMPT in collection to .venv {"applyAtShellIntegration":true,"applyAtProcessCreation":true}

Extension version: 2024.23.2025011301
VS Code version: Code 1.96.2 (fabdb6a30b49f79a7aba0f2ad9df9b399473380f, 2024-12-19T10:22:47.216Z)
OS version: Windows_NT x64 10.0.26100
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.12.8
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Venv
• Value of the python.languageServer setting: Pylance

User Settings

languageServer: "Pylance"

experiments
• optInto: ["pythonTerminalEnvVarActivation"]

Installed Extensions

Extension Name	Extension Id	Version
azure-account	ms-	0.12.0
behave-vsc	jim	0.6.4
better-cpp-syntax	jef	1.27.1
chai-spec-generator	rin	0.4.0
cmake	twx	0.0.17
cmake-tools	ms-	1.19.52
code-groovy	mar	0.1.2
code-runner	for	0.12.2
code-spell-checker	str	4.0.34
cortex-debug	mar	1.12.1
cpptools	ms-	1.22.11
cpptools-extension-pack	ms-	1.3.0
cpptools-themes	ms-	2.0.0
dbclient-jdbc	cwe	1.3.9
debug-tracker-vscode	mcu	0.0.15
debugpy	ms-	2024.14.0
dot	Ste	0.0.1
Doxygen	bbe	1.0.0
even-better-toml	tam	0.21.2
git-graph	mhu	1.30.0
githistory	don	0.6.20
github-markdown-preview	bie	0.3.0
gitlens	eam	16.1.1
gradle-language	nac	0.2.3
hexeditor	ms-	1.11.1
html-preview-vscode	geo	0.2.5
java	red	1.38.0
jenkins-pipeline-linter-connector	jan	1.2.0
jenkinsfile-support	sec	0.1.0
jinja	who	0.0.8
js-debug	ms-	1.96.0
js-debug-companion	ms-	1.1.3
jupyter	ms-	2024.11.0
jupyter-keymap	ms-	1.1.2
jupyter-renderers	ms-	1.0.21
Kotlin	mat	1.7.1
live-server	ms-	0.4.15
lldb-vscode	lan	0.2.3
makefile-tools	ms-	0.11.13
markdown-all-in-one	yzh	3.6.2
markdown-checkbox	bie	0.4.0
markdown-emoji	bie	0.3.1
markdown-footnotes	bie	0.1.1
markdown-jira	chi	1.1.0
markdown-jira-preview	tra	0.0.1
markdown-mermaid	bie	1.27.0
markdown-pdf	yza	1.5.0
markdown-preview-github-styles	bie	2.1.0
markdown-yaml-preamble	bie	0.1.0
material-theme	zhu	3.17.7
memory-view	mcu	0.0.25
mermaid-markdown-syntax-highlighting	bpr	1.7.0
node-tdd	pra	0.2.4
npm-intellisense	chr	1.4.5
one-monokai	aze	0.5.2
pascal-formatter	ale	2.9.0
peripheral-viewer	mcu	1.4.6
perl	ric	2.6.2
plantuml	jeb	2.18.1
powershell	ms-	2024.4.0
project-manager	ale	12.8.0
python	ms-	2024.23.2025011301
qub-msbuild	qub	0.6.3
quicktask	lky	3.5.8
reg	ion	1.1.0
regex	chr	0.5.1
remote-containers	ms-	0.394.0
remote-explorer	ms-	0.4.3
remote-ssh	ms-	0.116.1
remote-ssh-edit	ms-	0.87.0
remote-wsl	ms-	0.88.5
rtos-views	mcu	0.0.7
ruff	cha	2025.2.0
run-current-test	asv	0.2.0
test-adapter-converter	ms-	0.2.1
todotasks	san	0.5.0
togglehs	bbe	0.1.2
vsc-tasks	wal	0.9.0
vscode-azureresourcegroups	ms-	0.10.2
vscode-clangd	llv	0.1.33
vscode-commons	red	0.0.6
vscode-coverage-gutters	rya	2.12.0
vscode-docker	ms-	1.29.3
vscode-eslint	dba	3.0.10
vscode-gradle	vsc	3.16.4
vscode-groovy	Arg	0.0.1
vscode-groovy-lint	Nic	3.3.1
vscode-instant-markdown	dba	1.4.7
vscode-java-debug	vsc	0.58.1
vscode-java-dependency	vsc	0.24.1
vscode-java-pack	vsc	0.29.0
vscode-java-test	vsc	0.43.0
vscode-js-profile-table	ms-	1.0.10
vscode-jupyter-cell-tags	ms-	0.1.9
vscode-jupyter-slideshow	ms-	0.1.6
vscode-lldb	vad	1.11.1
vscode-markdownlint	Dav	0.58.1
vscode-maven	vsc	0.44.0
vscode-mysql-client2	cwe	8.1.1
vscode-perl	cfg	1.19.0
vscode-pylance	ms-	2024.12.1
vscode-reveal	evi	4.3.3
vscode-test-explorer	hbe	2.22.1
vscode-yaml	red	1.15.0
vsconan	afr	1.3.1
xml	Dot	2.5.1

System Info

Item	Value
CPUs	12th Gen Intel(R) Core(TM) i7-12800H (20 x 2803)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on 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_graphite: disabled_off video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	31.58GB (16.97GB free)
Process Argv	c-app/
Screen Reader	no
VM	0%

[schwaerz]

I think to know that git bash is not yet officially supported. However it'd be great to have this fixed.

[karthiknadig]

The pythonTerminalEnvVarActivation will likely get removed. That experiment has be breaking several user scenarios. One simple case being, if a activation script adds any aliases like deactivate (for example), that experiment fails to set it. It works fine if there is a deactivate script on path, but aliased functions like you can add in pwsh are broken.

That experiment also breaks cases where something runs post activation. So, highly likely it is getting dropped.

[schwaerz]

Thanks for the heads-up. Any plans for a successor already?

[karthiknadig]

Yes, in the works. In really early stages right now. https://github.com/microsoft/vscode-python-environments

[abrahan-munro]

Here is a workaround microsoft/vscode#240539 and a fix microsoft/vscode#240614.