Now that opendir, readir, closedir are implemented for ext4 we can use
fs_ls_generic() for implementing the ls command.

Adjust the unit tests:

* fs_ls_generic() produces more spaces between file size and name.
* The ext4 specific message "** Can not find directory. **\n" is not
  written anymore.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Checks that `make u-boot-initial-env` creates the text file
u-boot-initial-env and checks that it at least contains
`board=<something>`.

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

At present the tests assume that gawk is being used. Adjust the tests so
that the names are inserted in alphabetical order, so that awk is happy.

Also use PROCINFO to make gawk output in alphabetical order. This is not
ideal, since it changes the env-car ordering from what the user provided,
but it may be acceptable.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Fixes: https://source.denx.de/u-boot/u-boot/-/issues/10

* assert does not need parentheses
* add module docstring
* fix misspelled constant True
* limit lines to 100 characters

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

At present U-Boot environment variables, and thus scripts, are defined
by CONFIG_EXTRA_ENV_SETTINGS. It is painful to add large amounts of text
to this file and dealing with quoting and newlines is harder than it
should be. It would be better if we could just type the script into a
text file and have it included by U-Boot.

Add a feature that brings in a .env file associated with the board
config, if present. To use it, create a file in a board/<vendor>
directory, typically called <board>.env and controlled by the
CONFIG_ENV_SOURCE_FILE option.

The environment variables should be of the form "var=value". Values can
extend to multiple lines. See the README under 'Environment Variables:'
for more information and an example.

In many cases environment variables need access to the U-Boot CONFIG
variables to select different options. Enable this so that the environment
scripts can be as useful as the ones currently in the board config files.
This uses the C preprocessor, means that comments can be included in the
environment using /* ... */

Also support += to allow variables to be appended to. This is needed when
using the preprocessor.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Tested-by: Marek Behún <marek.behun@nic.cz>

On some distributions the mkfs.ext4 is under /sbin and /sbin is not set
for mere users. Include /sbin to the PATH when creating ext4 disk image,
so that users won't get a scary traceback from Python.

Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

The environment variable test uses function validate_empty() to check that
a variable is not defined. If the hush parser is not enabled, we cannot
refer to a variable by $var_name but only by ${var_name}.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Stephen Warren <swarren@nvidia.com>

Modify various test/py filesystem creation routines to support systems
that don't implement the metadata_csum ext4 feature.

Signed-off-by: Stephen Warren <swarren@nvidia.com>

Add test for the erase command tested on ENV in EXT4.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

Add basic test to persistent environment in ext4:
save and load in host ext4 file 'uboot.env'.

On first execution an empty EXT4 file system is created in
persistent data dir: env.ext4.img.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>