list-python.sh

#!/bin/zsh

export PATH="/usr/local/bin:/usr/bin:/bin:/opt/homebrew/bin:$PATH"

echo "\n🔍 Checking user-installed Python distributions..."
echo ""

typeset -a python_paths

add_path() {
  local p="$1"
  [[ -x "$p" ]] || return
  for existing in "${python_paths[@]}"; do
    [[ "$existing" == "$p" ]] && return
  done
  python_paths+="$p"
}

# 1️⃣ Detect Homebrew Python
brew_python=$(which python3 2>/dev/null)
if [[ -n "$brew_python" && "$brew_python" == *"homebrew"* ]]; then
  add_path "$brew_python"
fi

# 2️⃣ Detect Conda / Miniconda / Anaconda / Miniforge / Mambaforge
for conda_dir in "$HOME/miniforge3" "$HOME/mambaforge" "$HOME/anaconda3" "$HOME/miniconda3" "$HOME/opt/miniconda3" "$HOME/opt/anaconda3"; do
  [[ -x "$conda_dir/bin/python" ]] && add_path "$conda_dir/bin/python"
done

# 3️⃣ Detect pyenv versions (if installed)
if command -v pyenv >/dev/null 2>&1; then
  for v in $(pyenv versions --bare 2>/dev/null); do
    pyenv_python="$HOME/.pyenv/versions/$v/bin/python"
    [[ -x "$pyenv_python" ]] && add_path "$pyenv_python"
  done
fi

# 4️⃣ Display results
echo "📦 User Python Installations Found:"
echo "-----------------------------------"

if (( ${#python_paths[@]} == 0 )); then
  echo "No user-installed Pythons found."
else
  for path in "${python_paths[@]}"; do
    version=$("$path" --version 2>&1)
    if [[ "$path" == *"miniforge3"* ]]; then
      tag="(Miniforge)"
    elif [[ "$path" == *"mambaforge"* ]]; then
      tag="(Mambaforge)"
    elif [[ "$path" == *"anaconda3"* || "$path" == *"miniconda3"* ]]; then
      tag="(Anaconda/Miniconda)"
    elif [[ "$path" == *"pyenv"* ]]; then
      tag="(pyenv)"
    elif [[ "$path" == *"/opt/homebrew"* ]]; then
      tag="(Homebrew)"
    else
      tag=""
    fi
    printf "%-70s %s %s\n" "$path" "$version" "$tag"
  done
fi

echo "-----------------------------------"
echo "✅ Done.\n"