feat: add python installer

python/install.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+set -e
+set -u
+
+function __init_python() {
+    if [[ ! -x "${HOME}/.pyenv/bin/pyenv" ]]; then
+        "${HOME}/.local/bin/webi" "pyenv"
+    fi
+    export PATH="${HOME}/.pyenv/bin:${PATH}"
+    export PATH="${HOME}/.pyenv/shims:${PATH}"
+
+    #eval "$(pyenv init -)"
+    #eval "$(pyenv virtualenv-init -)"
+
+    pyenv update
+
+    my_latest_python3="$(
+        pyenv install --list |
+            grep -v -- - |
+            grep '3\.[0-9]\+\.[0-9]\+$' |
+            tail -n 1 |
+            cut -d' ' -f3
+    )"
+
+    #my_python="${WEBI_VERSION:-${my_latest_python3}}"
+    my_python="${my_latest_python3}"
+    echo "Installing ${my_python}"
+    pyenv install -v "${my_python}"
+    pyenv global "${my_python}"
+
+    echo ''
+    echo 'NOTE: You may also need to CLOSE and RE-OPEN your terminal for pyenv to take effect.'
+    echo '(to switch versions of python, see https://webinstall.dev/pyenv)'
+    echo ''
+}
+
+__init_python