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# SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
"""
Locating YNL spec and schema files on disk.
Resolves the directory holding the YAML specs (preferring an in-tree copy
over the installed system path) and maps family names to spec files.
"""
import os
SYS_SCHEMA_DIR='/usr/share/ynl'
RELATIVE_SCHEMA_DIR='../../../../../Documentation/netlink'
def schema_dir():
"""
Return the effective schema directory, preferring in-tree before
system schema directory.
"""
script_dir = os.path.dirname(os.path.abspath(__file__))
schema_dir_ = os.path.abspath(f"{script_dir}/{RELATIVE_SCHEMA_DIR}")
if not os.path.isdir(schema_dir_):
schema_dir_ = SYS_SCHEMA_DIR
if not os.path.isdir(schema_dir_):
raise FileNotFoundError(f"Schema directory {schema_dir_} does not exist")
return schema_dir_
def spec_dir():
"""
Return the effective spec directory, relative to the effective
schema directory.
"""
spec_dir_ = schema_dir() + '/specs'
if not os.path.isdir(spec_dir_):
raise FileNotFoundError(f"Spec directory {spec_dir_} does not exist")
return spec_dir_
def find_spec(family):
""" Return the path to the YAML spec file for a family by name. """
spec = f"{spec_dir()}/{family}.yaml"
if not os.path.isfile(spec):
raise FileNotFoundError(f"Spec for family '{family}' not found at {spec}")
return spec
def list_families():
""" Return the sorted names of all families with an installed spec. """
return sorted(f.removesuffix('.yaml')
for f in os.listdir(spec_dir()) if f.endswith('.yaml'))
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