Auto-activate Python virtual environment for any project with a venv directory in your shell (macOS/Linux).

auto_python_venv.sh

# Include this in your shell *rc file (e.g. .bashrc, .zshrc, etc).
# Update the folder name to your convention. 
# This uses venv as the virtual environment name, but if you use .venv, change it in the script.


# Auto-activate virtual environment for any project with a venv directory
function chpwd() {
    # Function to find venv directory in current path or parent directories
    local find_venv() {
        local dir="$PWD"
        while [[ "$dir" != "/" ]]; do
            if [[ -d "$dir/venv" && -f "$dir/venv/bin/activate" ]]; then
                echo "$dir/venv"
                return 0
            fi
            dir="$(dirname "$dir")"
        done
        return 1
    }
    
    local venv_path
    venv_path=$(find_venv)
    
    if [[ -n "$venv_path" ]]; then
        # We found a venv, check if it's already active
        if [[ "$VIRTUAL_ENV" != "$venv_path" ]]; then
            # Deactivate current venv if different
            if [[ -n "$VIRTUAL_ENV" ]]; then
                deactivate
            fi
            # Activate the found venv
            source "$venv_path/bin/activate"
            local project_name=$(basename "$(dirname "$venv_path")")
            echo "✅ Activated virtual environment for: $project_name"
        fi
    else
        # No venv found, deactivate if we have one active
        if [[ -n "$VIRTUAL_ENV" ]]; then
            local project_name=$(basename "$(dirname "$VIRTUAL_ENV")")
            deactivate
            echo "�� Deactivated virtual environment for: $project_name"
        fi
    fi
}

# Also run the function when the shell starts
chpwd