commit | b98239da2f18d2bfe0934ac705ef8d8b92277f74 | [log] [tgz] |
---|---|---|
author | Brandon Maier <brandon.maier@gmail.com> | Sun Jun 23 21:20:57 2024 -0500 |
committer | David Gibson <david@gibson.dropbear.id.au> | Mon Jun 24 13:24:13 2024 +1000 |
tree | 84830a83f329c3cfe5f8192640b77af940a21cbf | |
parent | c17d76ab5e84336bd98da30e0ea716f6a779e4ce [diff] |
tests/meson.build: fix python and yaml tests not running The run-tests.sh script attempts to detect if Python and Yaml support is enabled in the build. This has caused false-negatives where it fails to find the Python library even though it was compiled into the build. Avoid this problem altogether and always set the NO_PYTHON and NO_YAML to match if the features are enabled in Meson. Signed-off-by: Brandon Maier <brandon.maier@gmail.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The source tree contains the Device Tree Compiler (dtc) toolchain for working with device tree source and binary files and also libfdt, a utility library for reading and manipulating the binary format.
dtc and libfdt are maintained by:
A Python library wrapping libfdt is also available. To build this you will need to install swig
and Python development files. On Debian distributions:
$ sudo apt-get install swig python3-dev
The library provides an Fdt
class which you can use like this:
$ PYTHONPATH=../pylibfdt python3 >>> import libfdt >>> fdt = libfdt.Fdt(open('test_tree1.dtb', mode='rb').read()) >>> node = fdt.path_offset('/subnode@1') >>> print(node) 124 >>> prop_offset = fdt.first_property_offset(node) >>> prop = fdt.get_property_by_offset(prop_offset) >>> print('%s=%s' % (prop.name, prop.as_str())) compatible=subnode1 >>> node2 = fdt.path_offset('/') >>> print(fdt.getprop(node2, 'compatible').as_str()) test_tree1
You will find tests in tests/pylibfdt_tests.py
showing how to use each method. Help is available using the Python help command, e.g.:
$ cd pylibfdt $ python3 -c "import libfdt; help(libfdt)"
If you add new features, please check code coverage:
$ sudo apt-get install python3-coverage $ cd tests # It's just 'coverage' on most other distributions $ python3-coverage run pylibfdt_tests.py $ python3-coverage html # Open 'htmlcov/index.html' in your browser
The library can be installed with pip from a local source tree:
$ pip install . [--user|--prefix=/path/to/install_dir]
Or directly from a remote git repo:
$ pip install git+git://git.kernel.org/pub/scm/utils/dtc/dtc.git@main
The install depends on libfdt shared library being installed on the host system first. Generally, using --user
or --prefix
is not necessary and pip will use the default location for the Python installation which varies if the user is root or not.
You can also install everything via make if you like, but pip is recommended.
To install both libfdt and pylibfdt you can use:
$ make install [PREFIX=/path/to/install_dir]
To disable building the python library, even if swig and Python are available, use:
$ make NO_PYTHON=1
More work remains to support all of libfdt, including access to numeric values.