lib: Add kconfiglib code
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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@ -78,3 +78,7 @@ the modifications.
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The fast-hash directory contains code from:
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https://github.com/ztanml/fast-hash
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revision ae3bb53c199fe75619e940b5b6a3584ede99c5fc
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The kconfiglib directory contains code from:
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https://github.com/ulfalizer/Kconfiglib.git
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version v14.1.0 (061e71f7d78cb057762d88de088055361863deff).
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@ -0,0 +1,5 @@
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Copyright (c) 2011-2019, Ulf Magnusson <ulfalizer@gmail.com>
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Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#!/usr/bin/env python3
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# Copyright (c) 2018-2019, Ulf Magnusson
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# SPDX-License-Identifier: ISC
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"""
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Generates a header file with #defines from the configuration, matching the
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format of include/generated/autoconf.h in the Linux kernel.
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Optionally, also writes the configuration output as a .config file. See
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--config-out.
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The --sync-deps, --file-list, and --env-list options generate information that
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can be used to avoid needless rebuilds/reconfigurations.
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Before writing a header or configuration file, Kconfiglib compares the old
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contents of the file against the new contents. If there's no change, the write
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is skipped. This avoids updating file metadata like the modification time, and
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might save work depending on your build setup.
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By default, the configuration is generated from '.config'. A different
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configuration file can be passed in the KCONFIG_CONFIG environment variable.
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A custom header string can be inserted at the beginning of generated
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configuration and header files by setting the KCONFIG_CONFIG_HEADER and
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KCONFIG_AUTOHEADER_HEADER environment variables, respectively (this also works
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for other scripts). The string is not automatically made a comment (this is by
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design, to allow anything to be added), and no trailing newline is added, so
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add '/* */', '#', and newlines as appropriate.
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See https://www.gnu.org/software/make/manual/make.html#Multi_002dLine for a
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handy way to define multi-line variables in makefiles, for use with custom
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headers. Remember to export the variable to the environment.
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"""
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import argparse
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import os
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import sys
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import kconfiglib
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DEFAULT_SYNC_DEPS_PATH = "deps/"
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def main():
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parser = argparse.ArgumentParser(
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formatter_class=argparse.RawDescriptionHelpFormatter,
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description=__doc__)
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parser.add_argument(
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"--header-path",
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metavar="HEADER_FILE",
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help="""
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Path to write the generated header file to. If not specified, the path in the
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environment variable KCONFIG_AUTOHEADER is used if it is set, and 'config.h'
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otherwise.
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""")
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parser.add_argument(
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"--config-out",
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metavar="CONFIG_FILE",
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help="""
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Write the configuration to CONFIG_FILE. This is useful if you include .config
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files in Makefiles, as the generated configuration file will be a full .config
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file even if .config is outdated. The generated configuration matches what
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olddefconfig would produce. If you use sync-deps, you can include
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deps/auto.conf instead. --config-out is meant for cases where incremental build
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information isn't needed.
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""")
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parser.add_argument(
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"--sync-deps",
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metavar="OUTPUT_DIR",
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nargs="?",
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const=DEFAULT_SYNC_DEPS_PATH,
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help="""
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Enable generation of symbol dependency information for incremental builds,
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optionally specifying the output directory (default: {}). See the docstring of
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Kconfig.sync_deps() in Kconfiglib for more information.
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""".format(DEFAULT_SYNC_DEPS_PATH))
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parser.add_argument(
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"--file-list",
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metavar="OUTPUT_FILE",
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help="""
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Write a list of all Kconfig files to OUTPUT_FILE, with one file per line. The
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paths are relative to $srctree (or to the current directory if $srctree is
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unset). Files appear in the order they're 'source'd.
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""")
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parser.add_argument(
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"--env-list",
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metavar="OUTPUT_FILE",
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help="""
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Write a list of all environment variables referenced in Kconfig files to
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OUTPUT_FILE, with one variable per line. Each line has the format NAME=VALUE.
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Only environment variables referenced with the preprocessor $(VAR) syntax are
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included, and not variables referenced with the older $VAR syntax (which is
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only supported for backwards compatibility).
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""")
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parser.add_argument(
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"kconfig",
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metavar="KCONFIG",
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nargs="?",
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default="Kconfig",
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help="Top-level Kconfig file (default: Kconfig)")
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args = parser.parse_args()
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kconf = kconfiglib.Kconfig(args.kconfig, suppress_traceback=True)
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kconf.load_config()
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if args.header_path is None:
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if "KCONFIG_AUTOHEADER" in os.environ:
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kconf.write_autoconf()
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else:
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# Kconfiglib defaults to include/generated/autoconf.h to be
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# compatible with the C tools. 'config.h' is used here instead for
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# backwards compatibility. It's probably a saner default for tools
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# as well.
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kconf.write_autoconf("config.h")
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else:
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kconf.write_autoconf(args.header_path)
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if args.config_out is not None:
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kconf.write_config(args.config_out, save_old=False)
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if args.sync_deps is not None:
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kconf.sync_deps(args.sync_deps)
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if args.file_list is not None:
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with _open_write(args.file_list) as f:
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for path in kconf.kconfig_filenames:
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f.write(path + "\n")
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if args.env_list is not None:
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with _open_write(args.env_list) as f:
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for env_var in kconf.env_vars:
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f.write("{}={}\n".format(env_var, os.environ[env_var]))
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def _open_write(path):
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# Python 2/3 compatibility. io.open() is available on both, but makes
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# write() expect 'unicode' strings on Python 2.
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if sys.version_info[0] < 3:
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return open(path, "w")
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return open(path, "w", encoding="utf-8")
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if __name__ == "__main__":
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main()
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#!/usr/bin/env python3
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# Copyright (c) 2018-2019, Ulf Magnusson
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# SPDX-License-Identifier: ISC
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"""
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Updates an old .config file or creates a new one, by filling in default values
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for all new symbols. This is the same as picking the default selection for all
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symbols in oldconfig, or entering the menuconfig interface and immediately
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saving.
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The default input/output filename is '.config'. A different filename can be
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passed in the KCONFIG_CONFIG environment variable.
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When overwriting a configuration file, the old version is saved to
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<filename>.old (e.g. .config.old).
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"""
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import kconfiglib
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def main():
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kconf = kconfiglib.standard_kconfig(__doc__)
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print(kconf.load_config())
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print(kconf.write_config())
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if __name__ == "__main__":
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main()
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