rediff-patches.py

   1 #!/usr/bin/python3
   2
   3 # rediff-patches.py name.spec
   4
   5 import argparse
   6 import collections
   7 import logging
   8 import os
   9 import re
  10 import rpm
  11 import shutil
  12 import subprocess
  13 import sys
  14 import tempfile
  15
  16 RPMBUILD_ISPATCH = (1<<1)
  17
  18 def prepare_spec(r, patch_nr, before=False):
  19     tempspec = tempfile.NamedTemporaryFile()
  20     re_patch = re.compile(r'^%patch(?P<patch_number>\d+)\w*')
  21     for line in r.parsed.split('\n'):
  22         m = re_patch.match(line)
  23         if m:
  24             patch_number = int(m.group('patch_number'))
  25             if patch_nr == patch_number:
  26                 if before:
  27                     tempspec.write(b"exit 0\n# here was patch%d\n" % patch_nr)
  28                 else:
  29                     line = re.sub(r'#.*', "", line)
  30                     tempspec.write(b"%s\nexit 0\n" % line.encode('utf-8'))
  31                 continue
  32         tempspec.write(b"%s\n" % line.encode('utf-8'))
  33     tempspec.flush()
  34     return tempspec
  35
  36 def unpack(spec, appsourcedir, builddir):
  37     cmd = [ 'rpmbuild', '-bp',
  38            '--define',  '_builddir %s' % builddir,
  39            '--define', '_specdir %s' % appsourcedir,
  40            '--define', '_sourcedir %s' % appsourcedir,
  41            '--define', '_enable_debug_packages 0',
  42            '--define', '_default_patch_fuzz 2',
  43            spec ]
  44     logging.debug("running %s" % repr(cmd))
  45     try:
  46         res = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, check=True,
  47                               env={'LC_ALL': 'C.UTF-8'}, timeout=600)
  48     except subprocess.CalledProcessError as err:
  49         logging.error("unpacking exited with status code %d." % err.returncode)
  50         logging.error("STDOUT:")
  51         if err.stdout:
  52             for line in err.stdout.decode('utf-8').split("\n"):
  53                 logging.error(line)
  54         logging.error("STDERR:")
  55         if err.stderr:
  56             for line in err.stderr.decode('utf-8').split("\n"):
  57                 logging.error(line)
  58         raise
  59     else:
  60         logging.debug("unpacking exited with status code %d." % res.returncode)
  61         logging.debug("STDOUT/STDERR:")
  62         if res.stdout:
  63             for line in res.stdout.decode('utf-8').split("\n"):
  64                 logging.debug(line)
  65
  66
  67 def diff(diffdir_org, diffdir, builddir, output):
  68     diffdir_org = os.path.basename(diffdir_org)
  69     diffdir = os.path.basename(diffdir)
  70
  71     with open(output, 'wt') as f:
  72         cmd = [ 'diff', '-urNp', '-x', '*.orig', diffdir_org, diffdir ]
  73         logging.debug("running %s" % repr(cmd))
  74         try:
  75             subprocess.check_call(cmd, cwd=builddir, stdout=f, stderr=sys.stderr,
  76                                   env={'LC_ALL': 'C.UTF-8'}, timeout=600)
  77         except subprocess.CalledProcessError as err:
  78             if err.returncode != 1:
  79                 raise
  80     logging.info("rediff generated as %s" % output)
  81
  82 def diffstat(patch):
  83     cmd = [ 'diffstat', patch ]
  84     logging.info("running diffstat for: %s" % patch)
  85     try:
  86         subprocess.check_call(cmd, stdout=sys.stdout, stderr=sys.stderr,
  87                               env={'LC_ALL': 'C.UTF-8'}, timeout=60)
  88     except subprocess.CalledProcessError as err:
  89         logging.error("running diffstat failed: %s" % err)
  90     except FileNotFoundError as err:
  91         logging.error("running diffstat failed: %s, install diffstat package?" % err)
  92
  93 def main():
  94     parser = parser = argparse.ArgumentParser(description='rediff patches to avoid fuzzy hunks')
  95     parser.add_argument('spec', type=str, help='spec file name')
  96     parser.add_argument('-p', '--patches', type=str, help='comma separated list of patch numbers to rediff')
  97     parser.add_argument('-v', '--verbose', help='increase output verbosity', action='store_true')
  98     args = parser.parse_args()
  99
 100     logging.basicConfig(level=logging.INFO)
 101     rpm.setVerbosity(rpm.RPMLOG_ERR)
 102
 103     if args.verbose:
 104             logging.basicConfig(level=logging.DEBUG)
 105             rpm.setVerbosity(rpm.RPMLOG_DEBUG)
 106
 107     if args.patches:
 108         args.patches = [int(x) for x in args.patches.split(',')]
 109
 110     specfile = args.spec
 111     appsourcedir = os.path.dirname(os.path.abspath(specfile))
 112
 113     tempdir = tempfile.TemporaryDirectory(dir="/dev/shm")
 114     topdir = tempdir.name
 115     builddir = os.path.join(topdir, 'BUILD')
 116
 117     rpm.addMacro("_builddir", builddir)
 118
 119     r = rpm.spec(specfile)
 120
 121     patches = {}
 122
 123     for (name, nr, flags) in r.sources:
 124         if flags & RPMBUILD_ISPATCH:
 125             patches[nr] = name
 126
 127     applied_patches = collections.OrderedDict()
 128     re_patch = re.compile(r'^%patch(?P<patch_number>\d+)\w*(?P<patch_args>.*)')
 129     for line in r.parsed.split('\n'):
 130         m = re_patch.match(line)
 131         if not m:
 132             continue
 133         patch_nr = int(m.group('patch_number'))
 134         patch_args = m.group('patch_args')
 135         applied_patches[patch_nr] = patch_args
 136
 137     appbuilddir = rpm.expandMacro("%{_builddir}/%{?buildsubdir}")
 138
 139     for patch_nr in applied_patches.keys():
 140         if args.patches and patch_nr not in args.patches:
 141             continue
 142         patch_name = patches[patch_nr]
 143         logging.info("*** patch %d: %s" % (patch_nr, patch_name))
 144
 145         tempspec = prepare_spec(r, patch_nr, before=True)
 146         unpack(tempspec.name, appsourcedir, builddir)
 147         tempspec.close()
 148         os.rename(appbuilddir, appbuilddir + ".org")
 149
 150         tempspec = prepare_spec(r, patch_nr, before=False)
 151         unpack(tempspec.name, appsourcedir, builddir)
 152         tempspec.close()
 153
 154         diff(appbuilddir + ".org", appbuilddir, builddir, os.path.join(topdir, os.path.join(appsourcedir, patch_name + ".rediff")))
 155
 156         diffstat(os.path.join(topdir, os.path.join(appsourcedir, patch_name)))
 157         diffstat(os.path.join(topdir, os.path.join(appsourcedir, patch_name + ".rediff")))
 158
 159         shutil.rmtree(builddir)
 160     tempdir.cleanup()
 161
 162 if __name__ == '__main__':
 163     main()