src/damo_features.py

# SPDX-License-Identifier: GPL-2.0

import json

import _damo_sysinfo
import _damon
import _damon_args
import _damon_features
import _damon_sysfs

def pr_infer_version(sysinfo):
    version, err = sysinfo.infer_damon_version()
    if err is not None:
        print('Version inference fail (%s)' % err)
    print('Seems the version of DAMON is %s' % version)

def main(args):
    if args.invalidate_cache:
        err = _damo_sysfs.rm_sysinfo_file()
        if err is not None:
            print('invalidating cache fail (%s)' % err)
            exit(1)

    _damon.ensure_root_and_initialized(args)

    sysinfo, err = _damo_sysinfo.get_sysinfo()
    if err is not None:
        print('getting system info failed (%s)' % err)
        exit(1)
    feature_names = sorted([f.name for f in _damon_features.features_list])
    avail_features = [f.name for f in sysinfo.avail_damon_features]
    feature_support_map = {}
    for feature_name in feature_names:
        supported = feature_name in avail_features
        if args.type == 'all':
            print('%s: %s' % (feature_name,
                'Supported' if supported else 'Unsupported'))
        elif args.type == 'supported' and supported:
            print(feature_name)
        elif args.type == 'unsupported' and not supported:
            print(feature_name)
        elif args.type == 'json':
            feature_support_map[feature_name] = supported
    if args.type == 'json':
        print(json.dumps(feature_support_map, indent=4, sort_keys=True))

    if args.infer_version:
        pr_infer_version(sysinfo)

def set_argparser(parser):
    parser.add_argument('type', nargs='?',
            choices=['supported', 'unsupported', 'all', 'json'], default='all',
            help='type of features to listed')
    parser.add_argument('--infer_version', action='store_true',
                        help='infer version of DAMON')
    parser.add_argument('--invalidate_cache', action='store_true',
                        help='check features again, from the scratch')
    _damon_args.set_common_argparser(parser)