"""OS-Release Information
This module implements handlers for the `/etc/os-release` type of files. The
related documentation can be found in `os-release(5)`.
"""
import os
def parse_files(*paths):
"""Read Operating System Information from `os-release`
This creates a dictionary with information describing the running operating
system. It reads the information from the path array provided as `paths`.
The first available file takes precedence. It must be formatted according
to the rules in `os-release(5)`.
"""
osrelease = {}
path = next((p for p in paths if os.path.exists(p)), None)
if path:
with open(path) as f:
for line in f:
line = line.strip()
if not line:
continue
if line[0] == "#":
continue
key, value = line.split("=", 1)
osrelease[key] = value.strip('"')
return osrelease
def describe_os(*paths):
"""Read the Operating System Description from `os-release`
This creates a string describing the running operating-system name and
version. It uses `parse_files()` underneath to acquire the requested
information.
The returned string uses the format `${ID}${VERSION_ID}` with all dots
stripped.
"""
osrelease = parse_files(*paths)
# Fetch `ID` and `VERSION_ID`. Defaults are defined in `os-release(5)`.
osrelease_id = osrelease.get("ID", "linux")
osrelease_version_id = osrelease.get("VERSION_ID", "")
return osrelease_id + osrelease_version_id.replace(".", "")