Add basic support for 'pythonz' utility

rattail_fabric/python.py

@@ -37,6 +37,31 @@ from fabric.contrib.files import exists, append
 from rattail_fabric import apt, mkdir
 
 
+def install_pythonz():
+    """
+    Install the 'pythonz' utility, for installing arbitrary versions of python.
+
+    Note that this uses 'curl' so that should already be installed.
+
+    https://github.com/saghul/pythonz/blob/master/README.rst#installation
+    """
+    if not exists('/usr/local/pythonz'):
+        if not exists('/usr/local/src/pythonz'):
+            mkdir('/usr/local/src/pythonz')
+        if not exists('/usr/local/src/pythonz/pythonz-install'):
+            sudo('curl -kL -o /usr/local/src/pythonz/pythonz-install https://raw.github.com/saghul/pythonz/master/pythonz-install')
+            sudo('chmod +x /usr/local/src/pythonz/pythonz-install')
+        sudo('/usr/local/src/pythonz/pythonz-install')
+
+
+def install_python(version):
+    """
+    Install a specific version of python, via pythonz.
+    """
+    if not exists('/usr/local/pythonz/pythons/CPython-{}'.format(version)):
+        sudo('pythonz install {}'.format(version))
+
+
 def install_pip(use_apt=False, eager=True):
     """
     Install/upgrade the Pip installer for Python.