Add pipx installer script, make direnv script executable

packages/pipx.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+command -v python3 > /dev/null || {
+    echo "python3 executable not found, exiting"
+    return 1
+}
+
+python3 -c "import sys; assert sys.version_info[0] >= 3 and sys.version_info[1] >= 7" || {
+    echo python3 --version
+    echo "python version too old, requires >=3.7"
+    return 1
+}
+
+USERSITE=$(python3 -c "import site; print(site._get_path(site._getuserbase()))")
+mkdir -p $USERSITE
+
+if [[ ! -e "$USERSITE/pipx" ]]
+then
+    python3 -m pip install --user pipx
+fi

packages/pyenv.sh

@@ -10,3 +10,5 @@ index_main() {
 }
 
 index_main
+echo "suggested install to build python:\
+    base-devel openssl zlib xz tk"

packages/python.txt

@@ -1,9 +0,0 @@
-python
-python-pip
-python-pynvim
-python-virtualenv
-base-devel
-openssl
-zlib
-xz
-tk