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#!/usr/bin/python3
# Update the module information used to generate related device IDs
import itertools
import json
import os.path
import subprocess
import sys
def iter_modules(base_dir):
def onerror(e):
raise e
for root, dirs, files in \
os.walk(os.path.join(base_dir, 'kernel'), onerror=onerror):
for name in files:
if name.endswith('.ko.xz'):
yield name[:-6], os.path.join(root, name)
elif name.endswith('.ko'):
yield name[:-3], os.path.join(root, name)
def get_module_info(filename, attr_name):
output = subprocess.check_output(['modinfo', '-F', attr_name, filename],
text=True)
if output == '':
return []
return output.rstrip('\n').split('\n')
class JSONEncoderWithSet(json.JSONEncoder):
def default(self, o):
if isinstance(o, set):
return sorted(o)
return super().default(o)
def main(*kernel_ids):
if not kernel_ids:
kernel_dirs = '/lib/modules/' + os.uname().release
else:
kernel_dirs = [('/lib/modules/' + kernel_id
if '/' not in kernel_id
else kernel_id)
for kernel_id in kernel_ids]
modinfo = {}
for name, filename in itertools.chain.from_iterable(
iter_modules(kernel_dir) for kernel_dir in kernel_dirs):
# We only care about modules that might request firmware
firmware = set(get_module_info(filename, 'firmware'))
if not firmware:
continue
# We only care about aliases generated from device IDs, which
# start with <type> ":"
aliases = set(alias
for alias in get_module_info(filename, 'alias')
if ':' in alias)
if name not in modinfo:
modinfo[name] = {
'alias': aliases,
'firmware': firmware,
}
else:
modinfo[name]['alias'] |= aliases
modinfo[name]['firmware'] |= firmware
with open('debian/modinfo.json', 'w') as f:
json.dump(modinfo, f, indent=2, sort_keys=True, cls=JSONEncoderWithSet)
if __name__ == '__main__':
main(*sys.argv[1:])
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