Toggle showing venv with Oh my posh

I have already tried Oh My Posh to make my PowerShell look cool, simple, and essentials

and this is my conf.

{
    "$schema": "https://raw.githubusercontent.com/JanDeDobbeleer/oh-my-posh/main/themes/schema.json",
    "blocks": [
        {
            "alignment": "left",
            "segments": [
                {
                    "background": "#83769c",
                    "foreground": "#1C1E21",
                    "properties": {
                        "always_enabled": true
                    },
                    "leading_diamond": "\ue0b6",
                    "style": "diamond",
                    "template": "\ueba2 {{ .FormattedMs }}\u2800",
                    "type": "executiontime"
                },
                {
                    "background": "#609EA2",
                    "foreground": "#1C1E21",
                    "leading_diamond": "\ue0b6",
                    "powerline_symbol": "\ue0b0",
                    "properties": {
                        "folder_separator_icon": " \ue0b1 ",
                        "home_icon": "~",
                        "style": "folder"
                    },
                    "style": "powerline",
                    "template": " \uea83 {{ .Path }} ",
                    "type": "path"
                },
                {
                    "background": "#FF7F50",
                    "foreground": "#1C1E21",
                    "powerline_symbol": "\ue0b0",
                    "style": "powerline",
                    "template": " {{ .HEAD }}",
                    "type": "git"
                },
                {
                    "background": "#6CA35E",
                    "foreground": "#1C1E21",
                    "powerline_symbol": "\ue0b0",
                    "properties": {
                        "fetch_version": true
                    },
                    "style": "powerline",
                    "template": " \ue718 {{ if .PackageManagerIcon }}{{ .PackageManagerIcon }} {{ end }}{{ .Full }} ",
                    "type": "node"
                },
                {
                    "background": "#6495ED",
                    "foreground": "#1C1E21",
                    "powerline_symbol": "\ue0b0",
                    "properties": {
                        "display_mode": "files",
                        "fetch_virtual_env": false
                    },
                    "style": "powerline",
                    "template": " \ue235 {{ if .Error }}{{ .Error }}{{ else }}{{ .Full }}{{ end }} ",
                    "type": "python"
                },
                {
                    "background": "#ffff66",
                    "foreground": "#1C1E21",
                    "powerline_symbol": "\ue0b0",
                    "style": "powerline",
                    "template": " \uf0ad ",
                    "type": "root"
                }
            ],
            "type": "prompt"
        }
    ],
    "console_title_template": "{{ .Shell }} in {{ .Folder }}",
    "final_space": true,
    "version": 3
}

The Venv problem

when I go to the directory that has Python I see the Python full version, but when I activate a Venv I don’t know if it’s active or not.

so first thing I started to debug the Python segment block in Oh My Posh conf and after I saw the docs about Python I found that the default value of fetch_virtual_env is right so I deleted it and I changed the display_mode to context to display the segment when the environment or files is active

                    "properties": {
                        "display_mode": "context",
                    },

now let’s go to the template variable "template": " \ue235 {{ if .Error }}{{ .Error }}{{ else }}{{ .Full }}{{ end }} ",

it writes the Python logo then if there is no error it inserts the full Python version I only want the {{ .Major }}.{{ .Minor }} instead of {{ .Full }}

now in docs

.Venv

string

the virtual environment name (if present)

which seems promising I tried it {{ if .Error }}{{ .Error }}{{ else }}{{ if .Venv }}(venv) {{ end }}{{ .Major }}.{{ .Minor }}{{ end }} it will show (venv) if . Venv is present.

Nice, it works

It doesn’t go away 😭

this is because I’m on PowerShell and .bat files don’t work here it works in CMD and I can’t find a deactivate script ending with .ps1

How Activate.ps1 and deactivate works

After some frustration, I discover that typing deactivate in PowerShell works perfectly. Here’s why

When you run Activate.ps1 to activate the venv in PowerShell, it does two things:

1. Sets VIRTUAL_ENV: $env:VIRTUAL_ENV = "C:\path\to\venv"

2. defines a deactivate function in your session: This function modifies the environment variables directly in PowerShell, ensuring VIRTUAL_ENV is unset and the PATH is cleaned up.

Good Bye 😁