mirror of
https://github.com/xHyroM/void-packages.git
synced 2024-11-14 02:48:06 +01:00
126 lines
3.6 KiB
Python
Executable file
126 lines
3.6 KiB
Python
Executable file
#!/usr/bin/env python3
|
|
|
|
import os
|
|
import sys
|
|
import glob
|
|
import subprocess
|
|
import multiprocessing
|
|
|
|
from argparse import ArgumentParser
|
|
|
|
import networkx as nx
|
|
|
|
|
|
def enum_depends(pkg, xbpsdir, cachedir):
|
|
'''
|
|
Return a pair (pkg, [dependencies]), where [dependencies] is the list
|
|
of dependencies for the given package pkg. The argument xbpsdir should
|
|
be a path to a void-packages repository. Dependencies will be
|
|
determined by invoking
|
|
|
|
<xbpsdir>/xbps-src show-build-deps <pkg>
|
|
|
|
unless <cachedir>/deps-<pkg> file exist, in that case it is read.
|
|
|
|
If the return code of this call nonzero, a message will be printed but
|
|
the package will treated as if it has no dependencies.
|
|
'''
|
|
if cachedir:
|
|
cachepath = os.path.join(cachedir, 'deps-' + pkg)
|
|
try:
|
|
with open(cachepath) as f:
|
|
return pkg, [l.strip() for l in f]
|
|
except FileNotFoundError:
|
|
pass
|
|
|
|
cmd = [os.path.join(xbpsdir, 'xbps-src'), 'show-build-deps', pkg]
|
|
|
|
try:
|
|
deps = subprocess.check_output(cmd)
|
|
except subprocess.CalledProcessError as err:
|
|
print('xbps-src failed to find dependencies for package', pkg)
|
|
deps = [ ]
|
|
else:
|
|
deps = [d for d in deps.decode('utf-8').split('\n') if d]
|
|
if cachedir:
|
|
with open(cachepath, 'w') as f:
|
|
for d in deps:
|
|
print(d, file=f)
|
|
|
|
return pkg, deps
|
|
|
|
|
|
def find_cycles(depmap, xbpsdir):
|
|
'''
|
|
For a map depmap: package -> [dependencies], construct a directed graph
|
|
and identify any cycles therein.
|
|
|
|
The argument xbpsdir should be a path to the root of a void-packages
|
|
repository. All package names in depmap will be appended to the path
|
|
<xbpsdir>/srcpkgs and reduced with os.path.realpath to coalesce
|
|
subpackages.
|
|
'''
|
|
G = nx.DiGraph()
|
|
|
|
for i, deps in depmap.items():
|
|
path = os.path.join(xbpsdir, 'srcpkgs', i)
|
|
i = os.path.basename(os.path.realpath(path))
|
|
|
|
for j in deps:
|
|
path = os.path.join(xbpsdir, 'srcpkgs', j.strip())
|
|
j = os.path.basename(os.path.realpath(path))
|
|
G.add_edge(i, j)
|
|
|
|
for c in nx.strongly_connected_components(G):
|
|
if len(c) < 2: continue
|
|
pkgs = nx.to_dict_of_lists(G, c)
|
|
|
|
p = min(pkgs.keys())
|
|
cycles = [ ]
|
|
while True:
|
|
cycles.append(p)
|
|
|
|
# Cycle is complete when package is not in map
|
|
try: deps = pkgs.pop(p)
|
|
except KeyError: break
|
|
|
|
# Any of the dependencies here contributes to a cycle
|
|
p = min(deps)
|
|
if len(deps) > 1:
|
|
print('Multipath: {} -> {}, choosing first'.format(p, deps))
|
|
|
|
if cycles:
|
|
print('Cycle: ' + ' -> '.join(cycles) + '\n')
|
|
|
|
|
|
if __name__ == '__main__':
|
|
parser = ArgumentParser(description='Cycle detector for xbps-src')
|
|
parser.add_argument('-j', '--jobs', default=None,
|
|
type=int, help='Number of parallel jobs')
|
|
parser.add_argument('-c', '--cachedir', default=None,
|
|
help='Directory used to cache build dependencies (must exist)')
|
|
parser.add_argument('-d', '--directory',
|
|
default=None, help='Path to void-packages repo')
|
|
parser.add_argument('-Q', dest='check_pkgs', action='store_const',
|
|
const='yes', help='Use build dependencies for check -Q')
|
|
parser.add_argument('-K', dest='check_pkgs', action='store_const',
|
|
const='full', help='Use build dependencies for check -K')
|
|
|
|
args = parser.parse_args()
|
|
|
|
if not args.directory:
|
|
try: args.directory = os.environ['XBPS_DISTDIR']
|
|
except KeyError: args.directory = '.'
|
|
|
|
if args.check_pkgs:
|
|
os.environ['XBPS_CHECK_PKGS'] = args.check_pkgs
|
|
|
|
pool = multiprocessing.Pool(processes = args.jobs)
|
|
|
|
pattern = os.path.join(args.directory, 'srcpkgs', '*')
|
|
pkgs = {os.path.realpath(p) for p in glob.iglob(pattern)}
|
|
|
|
depargs = ((os.path.basename(g), args.directory, args.cachedir) for g in pkgs)
|
|
depmap = dict(pool.starmap(enum_depends, depargs))
|
|
|
|
find_cycles(depmap, args.directory)
|