Add use instructions to the README file.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Previous message was confusing as if -s would overwrite the
configuration file found on the persistent storage. This patch improves
the message.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Change the license to MPL-2.0 to comply with Apertis licensing
guidelines.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

--scan will look for configuration files on the persistent storage and
will use them on the SDK. This patch makes psdk print a message on each
file successfully configured.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Add the debian directory and the basic set of files for creating a
Debian package.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

This patch remove debug messages, add informative messages, and improve
existing messages for a better usability.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Improve the help text for --scan making it more verbose.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

The --scan option scans the persistent storage for configuration files
and configures the SDK to use each of them.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

This patch adds ConfigurationAlreadyPersistent exception and make
changes to check_configuration_file() to use it.

This patch also makes minor changes to a user message to include to path
to the original file instead of only mentioning the original file.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Use splitlines() instead of split('\n').

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Using os.path.{split,join} makes the code easier to read and is more
reliable than concatenating parts of a path using slashes.

This patch also removes PERSISTENT_ETC in favor of
PERSISTENT_ETC_PREFIX.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

This patch changes the help text to explain that --init also configures
the SDK for using the persistent disk after initialization.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

This patch checks if the user has passed --configure and --init and
shows the help message if the user does so.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

This patch updates the argparser configuration to handle two groups of
arguments:
 - Configuration files management
 - Persistent disk management

It also renames the positonal argument disk to path as it now can be
used as a pointer to both a disk and a configuration file depending on
which option is being used.

This patch changes how the Disk() is initialized as if the user is
managing configuration files, the script should manage to find the
persistent disk.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

This patch adds check_configuration_file() and conf_to_persistent()
functions that will be used to handle configuration files.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Fix typo of word partition.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Add more context to help messages. And include instructions on how to
use the configuration files option.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

The script will also be used to handle files on /etc, rename it to be
shorter and to remove disk from the name.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Improve help text that is shown when calling the script with -h.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Previously only --init was available. Add a --configure option to
configure the SDK to use a disk that is already initialized.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Add a function to check if /etc/fstab was already updated to use the
persistent workspace disk. This is useful for cases in which the user
calls the prepare_persistent_disk.py script more than once.

Currently the function only check if /etc/fstab was updated, and it will
return true even if the /etc/fstab line pointing to the persistent
workspace disk is commented. The rationale is that the script should
detect only automated intervention as manual intervention will put the
system in an unknown state from the perspective of the
prepare_persistent_disk.py perspective.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Add configure_sdk() to avoid code duplication as this will be now called
from two different paths.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Add a method to check if a disk is already initialized

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Remove debug code that is no longer needed.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Update the copyright header to include the author.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Fix pylint suggestions.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>