diskimage-builder/diskimage_builder/elements/devuser/README.rst
Ian Wienand 97c01e48ed Move elements & lib relative to diskimage_builder package
Currently we have all our elements and library files in a top-level
directory and install them into
<root>/share/diskimage-builder/[elements|lib] (where root is either /
or the root of a virtualenv).

The problem with this is that editable/development installs (pip -e)
do *not* install data_files.  Thus we have no canonical location to
look for elements -- leading to the various odd things we do such as a
whole bunch of guessing at the top of disk-image-create and having a
special test-loader in tests/test_elements.py so we can run python
unit tests on those elements that have it.

data_files is really the wrong thing to use for what are essentially
assets of the program.  data_files install works well for things like
config-files, init.d files or dropping documentation files.

By moving the elements under the diskimage_builder package, we always
know where they are relative to where we import from.  In fact,
pkg_resources has an api for this which we wrap in the new
diskimage_builder/paths.py helper [1].

We use this helper to find the correct path in the couple of places we
need to find the base-elements dir, and for the paths to import the
library shell functions.

Elements such as svc-map and pkg-map include python unit-tests, which
we do not need tests/test_elements.py to special-case load any more.
They just get found automatically by the normal subunit loader.

I have a follow-on change (I69ca3d26fede0506a6353c077c69f735c8d84d28)
to move disk-image-create to a regular python entry-point.

Unfortunately, this has to move to work with setuptools.  You'd think
a symlink under diskimage_builder/[elements|lib] would work, but it
doesn't.

[1] this API handles stuff like getting files out of .zip archive
modules, which we don't do.  Essentially for us it's returning
__file__.

Change-Id: I5e3e3c97f385b1a4ff2031a161a55b231895df5b
2016-11-01 17:27:41 -07:00

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=======
devuser
=======
Creates a user that is useful for development / debugging. The following
environment variables can be useful for configuration:
Environment Variables
---------------------
DIB_DEV_USER_USERNAME
:Required: No
:Default: devuser
:Description: Username for the created user.
DIB_DEV_USER_SHELL
:Required: No
:Default: System default (The useradd default is used)
:Description: Full path for the shell of the user. This is passed to useradd
using the -s parameter. Note that this does not install the (possibly)
required shell package.
DIB_DEV_USER_PWDLESS_SUDO
:Required: No
:Default: No
:Description: Enable passwordless sudo for the user.
DIB_DEV_USER_AUTHORIZED_KEYS
:Required: No
:Default: $HOME/.ssh/id_{rsa,dsa}.pub
:Description: Path to a file to copy into this users' .ssh/authorized_keys
If this is not specified then an attempt is made to use a the building
user's public key. To disable this behavior specify an invalid path for
this variable (such as /dev/null).
DIB_DEV_USER_PASSWORD
:Required: No
:Default: Password is disabled
:Description: Set the default password for this user. This is a fairly
insecure method of setting the password and is not advised.