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#!/usr/bin/env python3
from collections import defaultdict, namedtuple
from enum import IntEnum
import re
from subprocess import run
Package = namedtuple('Package', ('package', 'old', 'new'))
ZYPPER_PATTERN = re.compile(
r' +\| +'.join((
'^v',
'[^|]+',
'(?P<package>[^ ]+)',
'(?P<old>[^ ]+)',
'(?P<new>[^ ]+)'
)),
re.MULTILINE
)
# Using http://ftp.rpm.org/max-rpm/ch-rpm-file-format.html to make a
# few assumptions, e.g. versions can't contain hyphens.
SOURCERPM_PATTERN = re.compile(
r'\.'.join((
'-'.join(('(?P<name>.+)', '(?P<version>[^-]+)', '(?P<release>[^-]+)')),
'(?:no)?src',
'rpm'
))
)
def execute(command):
return run(command, check=True, text=True, capture_output=True).stdout
def zypper_list_updates():
zypp_output = execute(('zypper', 'list-updates'))
return tuple(
Package(**match.groupdict())
for match in ZYPPER_PATTERN.finditer(zypp_output)
)
def source_package_name(package):
if (match := SOURCERPM_PATTERN.fullmatch(package)) is None:
raise Exception(f'{package} does not match "{SOURCERPM_PATTERN}".')
return match.group('name')
def sort_by_source_package(packages):
sorted_packages = defaultdict(list)
for p in packages:
source_pkgs = execute(
('rpm', '--query', '--queryformat', r'%{SOURCERPM}\n', p.package)
)
# Some packages, e.g. kernel-default and kernel-devel, may be
# provided by multiple version of a source package. Assume
# the last one is one we want.
*_, last_source_pkg = source_pkgs.splitlines()
name = source_package_name(last_source_pkg)
sorted_packages[name].append(p)
return sorted_packages
class Sgr(IntEnum):
RESET = 0
BOLD = 1
RED_FG = 31
GREEN_FG = 32
def colorize(text, *params):
prefix = '\N{ESCAPE}['
suffix = 'm'
reset = f'{prefix}{Sgr.RESET}{suffix}'
param_list = ';'.join(map(format, params))
return f'{prefix}{param_list}{suffix}{text}{reset}'
def highlight_diff(old, new):
for i, (o, n) in enumerate(zip(old, new)):
if o != n:
break
old = old[:i]+colorize(old[i:], Sgr.BOLD, Sgr.RED_FG)
new = new[:i]+colorize(new[i:], Sgr.BOLD, Sgr.GREEN_FG)
return old, new
def padding(string, width):
# Python's str.format does not skip over control sequences when
# computing how long a string is. Compute padding manually before
# adding these sequences
return ' '*(width-len(string))
COLUMN = ' │ '
def print_header(widths, name):
if len(name) > widths['package']:
name = name[:widths['package']-1]+'…'
print(COLUMN.join((
colorize(name, Sgr.BOLD)+padding(name, widths['package']),
' '*widths['old'],
' '*widths['new'],
)))
def print_footer(i, n, widths):
if i < n:
print('─┼─'.join('─'*widths[f] for f in Package._fields))
def main():
print('Querying zypper list-updates… ', end='', flush=True)
packages = zypper_list_updates()
print(f'{len(packages)} updates.')
if not packages:
return
widths = {
field: max(len(p._asdict()[field]) for p in packages)
for field in Package._fields
}
print('Sorting by source package… ', end='', flush=True)
packages = sort_by_source_package(packages)
print('Done')
for i, src in enumerate(sorted(packages), 1):
print_header(widths, src)
for pkg, old, new in sorted(packages[src]):
old_padding = padding(old, widths['old'])
new_padding = padding(new, widths['new'])
old, new = highlight_diff(old, new)
print(COLUMN.join((
f'{pkg:<{widths["package"]}}',
old+old_padding,
new+new_padding
)))
print_footer(i, len(packages), widths)
if __name__ == '__main__':
main()
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