userinfo: Provide POSIX information about user currently running buildout.

Vincent Pelletier:
- s/_/-/ in exposed names
- Drop slapos.recipe.librecipe.GenericBaseRecipe inheritance

setup.py

@@ -197,6 +197,7 @@ setup(name=name,
           'trac = slapos.recipe.trac:Recipe',
           'urlparse = slapos.recipe._urlparse:Recipe',
           'uuid = slapos.recipe._uuid:Recipe',
+          'userinfo = slapos.recipe.userinfo:Recipe',
           'vifib = slapos.recipe.vifib:Recipe',
           'waitfor = slapos.recipe.waitfor:Recipe',
           'webchecker = slapos.recipe.web_checker:Recipe',

slapos/recipe/userinfo.py

+import grp
+import os
+import pwd
+
+class Recipe(object):
+    """
+    Provide POSIX information about the user that is currently running buildout.
+    """
+
+    def __init__(self, buildout, name, options):
+        pinfo = pwd.getpwuid(os.getuid())
+        options['pw-name'] = pinfo.pw_name
+        options['pw-uid'] = pinfo.pw_uid
+        options['pw-gid'] = pinfo.pw_gid
+        options['pw-dir'] = pinfo.pw_dir
+        options['pw-shell'] = pinfo.pw_shell
+
+        ginfo = grp.getgrgid(os.getgid())
+        options['gr-name'] = ginfo.gr_name
+        options['gr-gid'] = ginfo.gr_gid
+
+    install = update = lambda self: []