mdw@git.distorted.org.uk Git - hippotat/blob - hippotatlib/ownsource.py

   1 # Automatic source code provision (AGPL compliance)
   2
   3 import os
   4 import sys
   5 import fnmatch
   6 import stat
   7 import subprocess
   8 import tempfile
   9
  10 class SourceShipmentPreparer():
  11   def __init__(s, destdir):
  12     # caller may modify, and should read after calling generate()
  13     s.output_name = 'srcbomb.tar.gz'
  14     # defaults, caller can modify after creation
  15     s.src_filter = s.src_filter_glob
  16     s.src_package_globs = ['!/usr/local/*', '/usr*']
  17     s.src_filter_globs = ['!/etc/*']
  18     s.src_likeparent = s.src_likeparent_git
  19     s.src_direxcludes = s.src_direxcludes_git
  20     s.report_from_packages = s.report_from_packages_debian
  21     s.cwd = os.getcwd()
  22     s.find_rune_base = "find -type f -perm -004 \! -path '*/tmp/*'"
  23     s.ignores = ['*~', '*.bak', '*.tmp', '#*#', '__pycache__',
  24                   '[0-9][0-9][0-9][0-9]-src.cpio']
  25     s.rune_shell = ['/bin/bash', '-ec']
  26     s.show_pathnames = True
  27     s.rune_cpio = r'''
  28             set -o pipefail
  29             (
  30              %s
  31              # ^ by default, is find ... -print0
  32             ) | (
  33              cpio -Hustar -o --quiet -0 -R 1000:1000 || \
  34              cpio -Hustar -o --quiet -0
  35             )
  36     '''
  37     s.rune_portmanteau = r'''
  38             outfile=$1; shift
  39             rm -f "$outfile"
  40             GZIP=-1 tar zcf "$outfile" "$@"
  41     '''
  42     s.manifest_name='0000-MANIFEST.txt'
  43     # private
  44     s._destdir = destdir
  45     s._outcounter = 0
  46     s._manifest = []
  47     s._dirmap = { }
  48     s._package_files = { } # map filename => infol
  49
  50   def thing_matches_globs(s, thing, globs):
  51     for pat in globs:
  52       negate = pat.startswith('!')
  53       if negate: pat = pat[1:]
  54       if fnmatch.fnmatch(thing, pat):
  55         return not negate
  56     return negate
  57
  58   def src_filter_glob(s, src): # default s.src_filter
  59     return s.thing_matches_globs(src, s.src_filter_globs)
  60
  61   def src_direxcludes_git(s, d):
  62     try:
  63       excl = open(os.path.join(d, '.gitignore'))
  64     except FileNotFoundError:
  65       return []
  66     r = []
  67     for l in excl:
  68       l.strip
  69       if l.startswith('#'): next
  70       if not len(l): next
  71       r += l
  72     return r
  73
  74   def src_likeparent_git(s, src):
  75     try:
  76       os.stat(os.path.join(src, '.git/.'))
  77     except FileNotFoundError:
  78       return False
  79     else:
  80       return True
  81
  82   def src_parentfinder(s, src, infol): # callers may monkey-patch away
  83     for deref in (False,True):
  84       xinfo = []
  85
  86       search = src
  87       if deref:
  88         search = os.path.realpath(search)
  89
  90       def ascend():
  91         nonlocal search
  92         xinfo.append(os.path.basename(search))
  93         search = os.path.dirname(search)
  94
  95       try:
  96         stab = os.lstat(search)
  97       except FileNotFoundError:
  98         return
  99       if stat.S_ISREG(stab.st_mode):
 100         ascend()
 101
 102       while not os.path.ismount(search):
 103         if s.src_likeparent(search):
 104           xinfo.reverse()
 105           if len(xinfo): infol.append('want=' + os.path.join(*xinfo))
 106           return search
 107
 108         ascend()
 109
 110     # no .git found anywhere
 111     return src
 112
 113   def path_prenormaliser(s, d, infol): # callers may monkey-patch away
 114     return os.path.join(s.cwd, os.path.abspath(d))
 115
 116   def srcdir_find_rune(s, d):
 117     script = s.find_rune_base
 118     ignores = s.ignores + [s.output_name, s.manifest_name]
 119     ignores += s.src_direxcludes(d)
 120     for excl in ignores:
 121       assert("'" not in excl)
 122       script += r" \! -name '%s'"     % excl
 123       script += r" \! -path '*/%s/*'" % excl
 124     script += ' -print0'
 125     return script
 126
 127   def manifest_append(s, name, infol):
 128     s._manifest.append({ 'file':name, 'info':' '.join(infol) })
 129
 130   def manifest_append_absentfile(s, name, infol):
 131     s._manifest.append({ 'file_print':name, 'info':' '.join(infol) })
 132
 133   def new_output_name(s, nametail, infol):
 134     s._outcounter += 1
 135     name = '%04d-%s' % (s._outcounter, nametail)
 136     s.manifest_append(name, infol)
 137     return name
 138
 139   def open_output_fh(s, name, mode):
 140     return open(os.path.join(s._destdir, name), mode)
 141
 142   def src_dir(s, d, infol):
 143     try: name = s._dirmap[d]
 144     except KeyError: pass
 145     else:
 146       s.manifest_append(name, infol)
 147       return
 148
 149     if s.show_pathnames: infol.append(d)
 150     find_rune = s.srcdir_find_rune(d)
 151     total_rune = s.rune_cpio % find_rune
 152
 153     name = s.new_output_name('src.cpio', infol)
 154     s._dirmap[d] = name
 155     fh = s.open_output_fh(name, 'wb')
 156
 157     subprocess.run(s.rune_shell + [total_rune],
 158                    cwd=d,
 159                    stdin=subprocess.DEVNULL,
 160                    stdout=fh,
 161                    restore_signals=True,
 162                    check=True)
 163     fh.close()
 164
 165   def src_indir(s, d, infol):
 166     d = s.path_prenormaliser(d, infol)
 167     if not s.src_filter(d): return
 168
 169     d = s.src_parentfinder(d, infol)
 170     if d is None: return
 171     s.src_dir(d, infol)
 172
 173   def report_from_packages_debian(s, files):
 174     dpkg_S_in = tempfile.TemporaryFile(mode='w+')
 175     for (file, infols) in files.items():
 176       assert('\n' not in file)
 177       dpkg_S_in.write(file)
 178       dpkg_S_in.write('\0')
 179     dpkg_S_in.seek(0)
 180     cmdl = ['xargs','-0r','dpkg','-S','--']
 181     dpkg_S = subprocess.Popen(cmdl,
 182                               cwd='/',
 183                               stdin=dpkg_S_in,
 184                               stdout=subprocess.PIPE,
 185                               stderr=sys.stderr,
 186                               close_fds=False)
 187     dpkg_show_in = tempfile.TemporaryFile(mode='w+')
 188     pkginfos = { }
 189     for l in dpkg_S.stdout:
 190       l = l.strip(b'\n').decode('utf-8')
 191       (pkgs, fname) = l.split(': ',1)
 192       pks = pkgs.split(', ')
 193       for pk in pks:
 194         pkginfos.setdefault(pk,{'files':[]})['files'].append(fname)
 195         print(pk, file=dpkg_show_in)
 196     assert(dpkg_S.wait() == 0)
 197     dpkg_show_in.seek(0)
 198     cmdl = ['xargs','-r','dpkg-query',
 199             r'-f${binary:Package}\t${Package}\t${Architecture}\t${Version}\t${source:Package}\t${source:Version}\n',
 200             '--show','--']
 201     dpkg_show = subprocess.Popen(cmdl,
 202                                  cwd='/',
 203                                  stdin=dpkg_show_in,
 204                                  stdout=subprocess.PIPE,
 205                                  stderr=sys.stderr,
 206                                  close_fds=False)
 207     for l in dpkg_show.stdout:
 208       l = l.strip(b'\n').decode('utf-8')
 209       (pk,p,a,v,sp,sv) = l.split('\t')
 210       pkginfos[pk]['binary'] = p
 211       pkginfos[pk]['arch'] = a
 212       pkginfos[pk]['version'] = v
 213       pkginfos[pk]['source'] = sp
 214       pkginfos[pk]['sourceversion'] = sv
 215     assert(dpkg_show.wait() == 0)
 216     for pk in sorted(pkginfos.keys()):
 217       pi = pkginfos[pk]
 218       debfname = '%s_%s_%s.deb' % (pi['binary'], pi['version'], pi['arch'])
 219       dscfname = '%s_%s.dsc' % (pi['source'], pi['sourceversion'])
 220       s.manifest_append_absentfile(dscfname, [debfname])
 221       for fname in pi['files']:
 222         infol = files[fname]
 223         if s.show_pathnames: infol = infol + ['loaded='+fname]
 224         s.manifest_append_absentfile(' \t' + debfname, infol)
 225
 226   def thing_ought_packaged(s, fname):
 227     return s.thing_matches_globs(fname, s.src_package_globs)
 228
 229   def src_file_packaged(s, fname, infol):
 230     s._package_files.setdefault(fname,[]).extend(infol)
 231
 232   def src_file(s, fname, infol):
 233     def fngens():
 234       yield (infol, fname)
 235       infol_copy = infol.copy()
 236       yield (infol_copy, s.path_prenormaliser(fname, infol_copy))
 237       yield (infol, os.path.realpath(fname))
 238
 239     for (tinfol, tfname) in fngens():
 240       if s.thing_ought_packaged(tfname):
 241         s.src_file_packaged(tfname, tinfol)
 242         return
 243
 244     s.src_indir(fname, infol)
 245
 246   def src_argv0(s, program, infol):
 247     s.src_file(program, infol)
 248
 249   def src_syspath(s, fname, infol):
 250     if s.thing_ought_packaged(fname): return
 251     s.src_indir(fname, infol)
 252
 253   def src_module(s, m, infol):
 254     try: fname = m.__file__
 255     except AttributeError: return
 256     infol.append('module='+m.__name__)
 257
 258     if s.thing_ought_packaged(fname):
 259       s.src_file_packaged(fname, infol)
 260     else:
 261       s.src_indir(fname, infol)
 262
 263   def srcs_allitems(s, dirs=sys.path):
 264     s.src_argv0(sys.argv[0], ['argv[0]'])
 265     for d in sys.path:
 266       s.src_syspath(d, ['sys.path'])
 267     for m in sys.modules.values():
 268       s.src_module(m, ['sys.modules'])
 269     s.report_from_packages(s._package_files)
 270
 271   def mk_portmanteau(s):
 272     cmdl = s.rune_shell + [ s.rune_portmanteau, 'x',
 273                             s.output_name, s.manifest_name ]
 274     mfh = s.open_output_fh(s.manifest_name,'w')
 275     for me in s._manifest:
 276       try: fname = me['file']
 277       except KeyError: fname = me.get('file_print','')
 278       else: cmdl.append(fname)
 279       print('%s\t%s' % (fname, me['info']), file=mfh)
 280     mfh.close()
 281     subprocess.run(cmdl,
 282                    cwd=s._destdir,
 283                    stdin=subprocess.DEVNULL,
 284                    stdout=sys.stderr,
 285                    restore_signals=True,
 286                    check=True)
 287
 288   def generate(s):
 289     s.srcs_allitems()
 290     s.mk_portmanteau()