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Match the order the flags are defined.
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This can be useful to avoid needless reconfiguration, by checking if any
Kconfig file or environment variable has changed value before running
genconfig.
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Hardcoding load_config() and write_(min_)config() to write any message
to stdout is awkward, because it means that the message can't be easily
reused when stdout is the wrong place to write it to (e.g. in
menuconfig/guiconfig). This gets extra bad now that there's also the "No
change to ..." message.
Modify load_config() and write_(min_)config() to return the message as a
string instead, and have them always return a message, instead of just
when 'filename' is None and verbose=True. This makes things flexible and
straightforward.
Use the new behavior in menuconfig.py and guiconfig.py. They now show
"No change to ..." when saving a file doesn't modify it.
Tools that want to write messages to stdout should now do
print(kconf.load_config()) / print(kconf.write_config()).
There's no clean way to preserve perfect backwards compatibility here,
but keep accepting the 'verbose' argument and print a deprecation
warning if a value is ever passed for it. That way, scripts will keep
running, though possibly with less output on stdout.
This changes the meaning of the load_config() return value as well,
though I suspect it was only ever used by the menuconfig/guiconfig
interfaces.
The new behavior applies for kconfiglib.VERSION >= (12, 0, 0).
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Before writing a configuration file or header file, compare the old
contents of the file against the new contents. If there's no change,
skip the write, to avoid updating the file modification time.
This might avoid triggering redundant rebuilds depending on how the
build system is set up, and could allow for a simpler setup.
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This makes running pydoc(3) on the utilities helpful.
Reuse the module docstring for the --help text for utilities that use
argparse.
Also fix some copy-paste errors in the all*config.py descriptions and
clean up the language a bit.
Piggyback removal of an optimization in allmodconfig.py that's pretty
irrelevant now.
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Also remove some no longer used imports.
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Used in a single place.
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Configuration files generated by --config-out would usually be an
internal detail of the build system, so it's probably not helpful to
generate *.old files for them. Pass save_old=False to write_config() to
skip it.
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Make the previously obligatory 'filename' argument to load_config() and
write_config() default to None, and have that implement the behavior
you'd usually want: read/write either KCONFIG_CONFIG or ".config" if
unset, and read the 'option defconfig_list' configuration file if
KCONFIG_CONFIG/".config" doesn't exist.
For load_config(), filename=None also allows the configuration file to
be missing without raising an error. load_config() returns True if a
local configuration file was loaded, which is useful to check in the
menuconfig (if no local configuration file exists, we always want to
prompt for saving the configuration when exiting).
Also add a 'verbose' argument (default True) to load_config() and
read_config() that makes them print which files were read/written in
filename=None mode.
Also generalize olddefconfig.py and oldconfig.py to not require there to
already be a local configuration file. This was a bit silly for
olddefconfig.py in particular.
Remove the examples/defconfig.py script. It's a duplicate of
olddefconfig.py.
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Didn't mention --config-out.
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For projects that don't use incremental build information, it's a bit
wasteful to generate it just to get an updated .config file to include
in Makefiles. Add a '--config-out <filename>' option that just writes
the updated .config file, for those cases.
Also remove a redundant default=None argument for --sync-deps. None is
the default value.
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Everything's ISC.
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There should be a script available that generates the output header for
the build. It usually makes sense to generate both the header and any
incremental build information at the same time (automatically during
build), so roll them both into the same script.
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