Add generic bootstrap_python() logic

rattail_fabric2/deploy/python/premkvirtualenv

@@ -0,0 +1,16 @@
+#!/bin/bash
+# This hook is run after a new virtualenv is created and before it is activated.
+
+cat >$1/pip.conf <<EOF
+[global]
+log-file = $WORKON_HOME/$1/pip.log
+exists-action = i
+EOF
+
+cat >$1/bin/postactivate <<EOF
+export PIP_CONFIG_FILE=$WORKON_HOME/$1/pip.conf
+EOF
+
+cat >$1/bin/postdeactivate <<EOF
+unset PIP_CONFIG_FILE
+EOF

rattail_fabric2/python.py

@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
-#  Copyright © 2010-2018 Lance Edgar
+#  Copyright © 2010-2019 Lance Edgar
 #
 #  This file is part of Rattail.
 #
@@ -24,13 +24,35 @@
 Fabric Library for Python
 """
 
-from __future__ import unicode_literals, absolute_import
-
 from contextlib import contextmanager
 
-import six
+from rattail_fabric2 import apt, exists, make_deploy, mkdir
 
-from rattail_fabric2 import apt, exists, mkdir
+
+deploy = make_deploy(__file__)
+
+
+def bootstrap_python(c, pip_from_apt=True, workon_home='/srv/envs', user='rattail'):
+    """
+    Bootstrap a "complete" Python install.
+    """
+    # build dependencies
+    apt.install(
+        c,
+        'python-dev',
+        'python3-dev',
+        'libffi-dev',
+        'libjpeg-dev',
+        'libssl-dev',
+    )
+
+    # pip
+    install_pip(c, use_apt=pip_from_apt)
+
+    # virtualenvwrapper
+    workon_home = workon_home.rstrip('/')
+    install_virtualenvwrapper(c, workon_home=workon_home, user=user, configure_me=False)
+    deploy(c, 'python/premkvirtualenv', '{}/premkvirtualenv'.format(workon_home), owner=user, use_sudo=True)
 
 
 def install_pip(c, use_apt=False, eager=True):
@@ -151,7 +173,7 @@ def cdvirtualenv(c, name, subdirs=[], workon_home='/srv/envs'):
     """
     Context manager to prefix your command(s) with the ``cdvirtualenv`` command.
     """
-    if isinstance(subdirs, six.string_types):
+    if isinstance(subdirs, str):
         subdirs = [subdirs]
     path = '{}/{}'.format(workon_home, name)
     if subdirs: