'''
Generates a version string suitable for a Debian package
'''

import kuroko
import os

let version = kuroko.hexversion

# Extract version number components
let major  = (version >> 24) & 0xFF
let minor  = (version >> 16) & 0xFF
let patch  = (version >> 8)  & 0xFF
let level  = (version >> 4)  & 0xF
let serial = version & 0xF

# Map prerelease levels to strings
let levels = {0xa: 'a', 0xb: 'b', 0xc: 'rc'}
level = f'~{levels.get(level)}{serial}' if level in levels else ''

# Figure out what the package revision number should be;
# set this if you want something other than 1.
let revision = os.environ.get('KRK_PACKAGE_REVISION','1')

# Print a final version number
print(f'{major}.{minor}.{patch}{level}-{revision}')