build.py

   1 # Copyright (C) 2006, Thomas Leonard
   2 # See http://0install.net/0compile.html
   3
   4 import sys, os, __main__, time, shutil, glob, codecs, subprocess
   5 from os.path import join
   6 from logging import info, warn
   7 from xml.dom import minidom, XMLNS_NAMESPACE
   8 from optparse import OptionParser
   9
  10 from support import *
  11
  12 if hasattr(os.path, 'relpath'):
  13         relpath = os.path.relpath
  14 else:
  15         # Copied from Python 2.6 (GPL compatible license)
  16         # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006 Python Software Foundation; All Rights Reserved
  17
  18         # Return the longest prefix of all list elements.
  19         def commonprefix(m):
  20                 "Given a list of pathnames, returns the longest common leading component"
  21                 if not m: return ''
  22                 s1 = min(m)
  23                 s2 = max(m)
  24                 for i, c in enumerate(s1):
  25                         if c != s2[i]:
  26                                 return s1[:i]
  27                 return s1
  28
  29         def relpath(path, start):
  30                 """Return a relative version of a path"""
  31
  32                 if not path:
  33                         raise ValueError("no path specified")
  34
  35                 start_list = os.path.abspath(start).split('/')
  36                 path_list = os.path.abspath(path).split('/')
  37
  38                 # Work out how much of the filepath is shared by start and path.
  39                 i = len(commonprefix([start_list, path_list]))
  40
  41                 rel_list = ['..'] * (len(start_list)-i) + path_list[i:]
  42                 if not rel_list:
  43                         return '.'
  44                 return join(*rel_list)
  45
  46 # If we have to modify any pkg-config files, we put the new versions in $TMPDIR/PKG_CONFIG_OVERRIDES
  47 PKG_CONFIG_OVERRIDES = 'pkg-config-overrides'
  48
  49 def env(name, value):
  50         os.environ[name] = value
  51         print "%s=%s" % (name, value)
  52
  53 def do_env_binding(binding, path):
  54         env(binding.name, binding.get_value(path, os.environ.get(binding.name, None)))
  55
  56 def correct_for_64bit(base, rel_path):
  57         """If rel_path starts lib or usr/lib and doesn't exist, try with lib64 instead."""
  58         if os.path.exists(os.path.join(base, rel_path)):
  59                 return rel_path
  60
  61         if rel_path.startswith('lib/') or rel_path.startswith('usr/lib/'):
  62                 new_rel_path = rel_path.replace('lib/', 'lib64/', 1)
  63                 if os.path.exists(os.path.join(base, new_rel_path)):
  64                         return new_rel_path
  65
  66         return rel_path
  67
  68 def write_pc(name, lines):
  69         overrides_dir = os.path.join(os.environ['TMPDIR'], PKG_CONFIG_OVERRIDES)
  70         if not os.path.isdir(overrides_dir):
  71                 os.mkdir(overrides_dir)
  72         stream = open(os.path.join(overrides_dir, name), 'w')
  73         stream.write(''.join(lines))
  74         stream.close()
  75
  76 def do_pkg_config_binding(binding, impl):
  77         feed_name = impl.feed.split('/')[-1]
  78         path = lookup(impl.id)
  79         new_insert = correct_for_64bit(path, binding.insert)
  80         if new_insert != binding.insert:
  81                 print "PKG_CONFIG_PATH dir <%s>/%s not found; using %s instead" % (feed_name, binding.insert, new_insert)
  82                 binding = model.EnvironmentBinding(binding.name,
  83                                         new_insert,
  84                                         binding.default,
  85                                         binding.mode)
  86
  87         orig_path = os.path.join(path, binding.insert)
  88         if os.path.isdir(orig_path):
  89                 for pc in os.listdir(orig_path):
  90                         stream = open(os.path.join(orig_path, pc))
  91                         lines = stream.readlines()
  92                         stream.close()
  93                         for i, line in enumerate(lines):
  94                                 if '=' not in line: continue
  95                                 name, value = [x.strip() for x in line.split('=', 1)]
  96                                 if name == 'prefix' and value.startswith('/'):
  97                                         print "Absolute prefix=%s in %s; overriding..." % (value, feed_name)
  98                                         lines[i] = 'prefix=%s/%s\n' % (path, value[1:])
  99                                         write_pc(pc, lines)
 100                                         break
 101         do_env_binding(binding, path)
 102
 103 def fixup_generated_pkgconfig_file(pc_file):
 104         stream = open(pc_file)
 105         lines = stream.readlines()
 106         stream.close()
 107         for i, line in enumerate(lines):
 108                 if '=' not in line: continue
 109                 name, value = [x.strip() for x in line.split('=', 1)]
 110                 if name == 'prefix' and value.startswith('/'):
 111                         print "Absolute prefix=%s in %s; fixing..." % (value, pc_file)
 112                         rel_path = relpath(value, os.path.dirname(pc_file))     # Requires Python 2.6
 113                         lines[i] = 'prefix=${pcfiledir}/%s\n' % rel_path
 114                         write_pc(pc_file, lines)
 115                         break
 116
 117 # After doing a build, check that we didn't generate pkgconfig files with absolute paths
 118 # Rewrite if so
 119 def fixup_generated_pkgconfig_files():
 120         for root, dirs, files in os.walk(os.environ['DISTDIR']):
 121                 if os.path.basename(root) == 'pkgconfig':
 122                         for f in files:
 123                                 if f.endswith('.pc'):
 124                                         info("Checking generated pkgconfig file '%s'", f)
 125                                         fixup_generated_pkgconfig_file(os.path.join(root, f))
 126
 127 def remove_la_file(path):
 128         # Read the contents...
 129         stream = open(path)
 130         data = stream.read()
 131         stream.close()
 132
 133         # Check it really is a libtool archive...
 134         if 'Please DO NOT delete this file' not in data:
 135                 warn("Ignoring %s; doesn't look like a libtool archive", path)
 136                 return
 137
 138         os.unlink(path)
 139         print "Removed %s (.la files contain absolute paths)" % path
 140
 141 # libtool archives contain hard-coded paths. Lucky, modern systems don't need them, so remove
 142 # them.
 143 def remove_la_files():
 144         for root, dirs, files in os.walk(os.environ['DISTDIR']):
 145                 if os.path.basename(root) == 'lib':
 146                         for f in files:
 147                                 if f.endswith('.la'):
 148                                         remove_la_file(os.path.join(root, f))
 149                                 if f.endswith('.a'):
 150                                         warn("Found static archive '%s'; maybe build with --disable-static?", f)
 151
 152 def do_build_internal(options, args):
 153         """build-internal"""
 154         # If a sandbox is being used, we're in it now.
 155         import getpass, socket, time
 156
 157         buildenv = BuildEnv()
 158         sels = buildenv.get_selections()
 159
 160         builddir = os.path.realpath('build')
 161         ensure_dir(buildenv.metadir)
 162
 163         build_env_xml = join(buildenv.metadir, 'build-environment.xml')
 164
 165         buildenv_doc = buildenv.get_selections().toDOM()
 166
 167         # Create build-environment.xml file
 168         root = buildenv_doc.documentElement
 169         info = buildenv_doc.createElementNS(XMLNS_0COMPILE, 'build-info')
 170         root.appendChild(info)
 171         info.setAttributeNS(None, 'time', time.strftime('%Y-%m-%d %H:%M').strip())
 172         info.setAttributeNS(None, 'host', socket.getfqdn())
 173         info.setAttributeNS(None, 'user', getpass.getuser())
 174         uname = os.uname()
 175         info.setAttributeNS(None, 'arch', '%s-%s' % (uname[0], uname[4]))
 176         stream = file(build_env_xml, 'w')
 177         buildenv_doc.writexml(stream, addindent="  ", newl="\n")
 178         stream.close()
 179
 180         # Create local binary interface file
 181         src_iface = iface_cache.get_interface(buildenv.interface)
 182         src_impl = buildenv.chosen_impl(buildenv.interface)
 183         write_sample_interface(buildenv, src_iface, src_impl)
 184
 185         # Check 0compile is new enough
 186         min_version = parse_version(src_impl.attrs.get(XMLNS_0COMPILE + ' min-version', None))
 187         if min_version and min_version > parse_version(__main__.version):
 188                 raise SafeException("%s-%s requires 0compile >= %s, but we are only version %s" %
 189                                 (src_iface.get_name(), src_impl.version, format_version(min_version), __main__.version))
 190
 191         # Create the patch
 192         patch_file = join(buildenv.metadir, 'from-%s.patch' % src_impl.version)
 193         if buildenv.user_srcdir:
 194                 # (ignore errors; will already be shown on stderr)
 195                 os.system("diff -urN '%s' src > %s" %
 196                         (buildenv.orig_srcdir.replace('\\', '\\\\').replace("'", "\\'"),
 197                          patch_file))
 198                 if os.path.getsize(patch_file) == 0:
 199                         os.unlink(patch_file)
 200         elif os.path.exists(patch_file):
 201                 os.unlink(patch_file)
 202
 203         env('BUILDDIR', builddir)
 204         env('DISTDIR', buildenv.distdir)
 205         env('SRCDIR', buildenv.user_srcdir or buildenv.orig_srcdir)
 206         os.chdir(builddir)
 207         print "cd", builddir
 208
 209         for needed_iface in sels.selections:
 210                 impl = buildenv.chosen_impl(needed_iface)
 211                 assert impl
 212                 for dep in impl.dependencies:
 213                         dep_iface = sels.selections[dep.interface]
 214                         for b in dep.bindings:
 215                                 if isinstance(b, EnvironmentBinding):
 216                                         dep_impl = buildenv.chosen_impl(dep.interface)
 217                                         if b.name == 'PKG_CONFIG_PATH':
 218                                                 do_pkg_config_binding(b, dep_impl)
 219                                         else:
 220                                                 do_env_binding(b, lookup(dep_impl.id))
 221
 222         mappings = {}
 223         for impl in sels.selections.values():
 224                 new_mappings = impl.attrs.get(XMLNS_0COMPILE + ' lib-mappings', '')
 225                 if new_mappings:
 226                         new_mappings = new_mappings.split(' ')
 227                         for mapping in new_mappings:
 228                                 assert ':' in mapping, "lib-mappings missing ':' in '%s' from '%s'" % (mapping, impl.feed)
 229                                 name, major_version = mapping.split(':', 1)
 230                                 assert '/' not in mapping, "lib-mappings '%s' contains a / in the version number (from '%s')!" % (mapping, impl.feed)
 231                                 mappings[name] = 'lib%s.so.%s' % (name, major_version)
 232                 impl_path = lookup(impl.id)
 233                 for libdirname in ['lib', 'usr/lib', 'lib64', 'usr/lib64']:
 234                         libdir = os.path.join(impl_path, libdirname)
 235                         if os.path.isdir(libdir):
 236                                 find_broken_version_symlinks(libdir, mappings)
 237
 238         if mappings:
 239                 set_up_mappings(mappings)
 240
 241         overrides_dir = os.path.join(os.environ['TMPDIR'], PKG_CONFIG_OVERRIDES)
 242         if os.path.isdir(overrides_dir):
 243                 add_overrides = model.EnvironmentBinding('PKG_CONFIG_PATH', PKG_CONFIG_OVERRIDES)
 244                 do_env_binding(add_overrides, os.environ['TMPDIR'])
 245
 246         # Some programs want to put temporary build files in the source directory.
 247         # Make a copy of the source if needed.
 248         dup_src_type = src_impl.attrs.get(XMLNS_0COMPILE + ' dup-src', None)
 249         if dup_src_type == 'true':
 250                 dup_src(shutil.copy2)
 251                 env('SRCDIR', builddir)
 252         elif dup_src_type:
 253                 raise Exception("Unknown dup-src value '%s'" % dup_src_type)
 254
 255         if options.shell:
 256                 spawn_and_check(find_in_path('sh'), [])
 257         else:
 258                 command = src_impl.attrs[XMLNS_0COMPILE + ' command']
 259
 260                 # Remove any existing log files
 261                 for log in ['build.log', 'build-success.log', 'build-failure.log']:
 262                         if os.path.exists(log):
 263                                 os.unlink(log)
 264
 265                 # Run the command, copying output to a new log
 266                 log = file('build.log', 'w')
 267                 try:
 268                         print >>log, "Build log for %s-%s" % (src_iface.get_name(),
 269                                                               src_impl.version)
 270                         print >>log, "\nBuilt using 0compile-%s" % __main__.version
 271                         print >>log, "\nBuild system: " + ', '.join(uname)
 272                         print >>log, "\n%s:\n" % ENV_FILE
 273                         shutil.copyfileobj(file("../" + ENV_FILE), log)
 274
 275                         log.write('\n')
 276
 277                         if os.path.exists(patch_file):
 278                                 print >>log, "\nPatched with:\n"
 279                                 shutil.copyfileobj(file(patch_file), log)
 280                                 log.write('\n')
 281
 282                         print "Executing: " + command
 283                         print >>log, "Executing: " + command
 284
 285                         # Tee the output to the console and to the log
 286                         child = subprocess.Popen(command, shell = True, stdout = subprocess.PIPE, stderr = subprocess.STDOUT)
 287                         while True:
 288                                 data = os.read(child.stdout.fileno(), 100)
 289                                 if not data: break
 290                                 sys.stdout.write(data)
 291                                 log.write(data)
 292                         status = child.wait()
 293                         failure = None
 294                         if status == 0:
 295                                 print >>log, "Build successful"
 296                                 fixup_generated_pkgconfig_files()
 297                                 remove_la_files()
 298                         elif status > 0:
 299                                 failure = "Build failed with exit code %d" % status
 300                         else:
 301                                 failure = "Build failure: exited due to signal %d" % (-status)
 302                         if failure:
 303                                 print >>log, failure
 304                                 os.rename('build.log', 'build-failure.log')
 305                                 raise SafeException("Command '%s': %s" % (command, failure))
 306                         else:
 307                                 os.rename('build.log', 'build-success.log')
 308                 finally:
 309                         log.close()
 310
 311 def do_build(args):
 312         """build [ --no-sandbox ] [ --shell | --force | --clean ]"""
 313         buildenv = BuildEnv()
 314         sels = buildenv.get_selections()
 315
 316         parser = OptionParser(usage="usage: %prog build [options]")
 317
 318         parser.add_option('', "--no-sandbox", help="disable use of sandboxing", action='store_true')
 319         parser.add_option("-s", "--shell", help="run a shell instead of building", action='store_true')
 320         parser.add_option("-c", "--clean", help="remove the build directories", action='store_true')
 321         parser.add_option("-f", "--force", help="build even if dependencies have changed", action='store_true')
 322
 323         parser.disable_interspersed_args()
 324
 325         (options, args2) = parser.parse_args(args)
 326
 327         builddir = os.path.realpath('build')
 328
 329         changes = buildenv.get_build_changes()
 330         if changes:
 331                 if not (options.force or options.clean):
 332                         raise SafeException("Build dependencies have changed:\n" +
 333                                         '\n'.join(changes) + "\n\n" +
 334                                         "To build anyway, use: 0compile build --force\n" +
 335                                         "To do a clean build:  0compile build --clean")
 336                 if not options.no_sandbox:
 337                         print "Build dependencies have changed:\n" + '\n'.join(changes)
 338
 339         ensure_dir(builddir, options.clean)
 340         ensure_dir(buildenv.distdir, options.clean)
 341
 342         if options.no_sandbox:
 343                 return do_build_internal(options, args2)
 344
 345         tmpdir = tempfile.mkdtemp(prefix = '0compile-')
 346         try:
 347                 my_dir = os.path.dirname(__file__)
 348                 readable = ['.', my_dir]
 349                 writable = ['build', buildenv.distdir, tmpdir]
 350                 env('TMPDIR', tmpdir)
 351
 352                 for selection in sels.selections.values():
 353                         readable.append(lookup(selection.id))
 354
 355                 options = []
 356                 if __main__.options.verbose:
 357                         options.append('--verbose')
 358
 359                 readable.append('/etc') # /etc/ld.*
 360
 361                 spawn_maybe_sandboxed(readable, writable, tmpdir, sys.executable, ['-u', sys.argv[0]] + options + ['build', '--no-sandbox'] + args)
 362         finally:
 363                 info("Deleting temporary directory '%s'" % tmpdir)
 364                 shutil.rmtree(tmpdir)
 365
 366 def write_sample_interface(buildenv, iface, src_impl):
 367         path = buildenv.local_iface_file
 368         target_arch = buildenv.target_arch
 369
 370         impl = minidom.getDOMImplementation()
 371
 372         XMLNS_IFACE = namespaces.XMLNS_IFACE
 373
 374         doc = impl.createDocument(XMLNS_IFACE, "interface", None)
 375
 376         root = doc.documentElement
 377         root.setAttributeNS(XMLNS_NAMESPACE, 'xmlns', XMLNS_IFACE)
 378
 379         def addSimple(parent, name, text = None):
 380                 elem = doc.createElementNS(XMLNS_IFACE, name)
 381
 382                 parent.appendChild(doc.createTextNode('\n' + '  ' * (1 + depth(parent))))
 383                 parent.appendChild(elem)
 384                 if text:
 385                         elem.appendChild(doc.createTextNode(text))
 386                 return elem
 387
 388         def close(element):
 389                 element.appendChild(doc.createTextNode('\n' + '  ' * depth(element)))
 390
 391         addSimple(root, 'name', iface.name)
 392         addSimple(root, 'summary', iface.summary)
 393         addSimple(root, 'description', iface.description)
 394         feed_for = addSimple(root, 'feed-for')
 395
 396         uri = iface.uri
 397         if uri.startswith('/'):
 398                 print "Note: source %s is a local feed" % iface.uri
 399                 for feed_uri in iface.feed_for or []:
 400                         uri = feed_uri
 401                         print "Will use <feed-for interface='%s'> instead..." % uri
 402                         break
 403                 else:
 404                         master_feed = minidom.parse(uri).documentElement
 405                         if master_feed.hasAttribute('uri'):
 406                                 uri = master_feed.getAttribute('uri')
 407                                 print "Will use <feed-for interface='%s'> instead..." % uri
 408
 409         feed_for.setAttributeNS(None, 'interface', uri)
 410
 411         group = addSimple(root, 'group')
 412         main = src_impl.attrs.get(XMLNS_0COMPILE + ' binary-main', None)
 413         if main:
 414                 group.setAttributeNS(None, 'main', main)
 415
 416         lib_mappings = src_impl.attrs.get(XMLNS_0COMPILE + ' binary-lib-mappings', None)
 417         if lib_mappings:
 418                 root.setAttributeNS(XMLNS_NAMESPACE, 'xmlns:compile', XMLNS_0COMPILE)
 419                 group.setAttributeNS(XMLNS_0COMPILE, 'compile:lib-mappings', lib_mappings)
 420
 421         for d in src_impl.dependencies:
 422                 # 0launch < 0.32 messed up the namespace...
 423                 if parse_bool(d.metadata.get('include-binary', 'false')) or \
 424                    parse_bool(d.metadata.get(XMLNS_0COMPILE + ' include-binary', 'false')):
 425                         requires = addSimple(group, 'requires')
 426                         requires.setAttributeNS(None, 'interface', d.interface)
 427                         for b in d.bindings:
 428                                 if isinstance(b, model.EnvironmentBinding):
 429                                         env_elem = addSimple(requires, 'environment')
 430                                         env_elem.setAttributeNS(None, 'name', b.name)
 431                                         env_elem.setAttributeNS(None, 'insert', b.insert)
 432                                         if b.default:
 433                                                 env_elem.setAttributeNS(None, 'default', b.default)
 434                                 else:
 435                                         raise Exception('Unknown binding type ' + b)
 436                         close(requires)
 437
 438         group.setAttributeNS(None, 'arch', target_arch)
 439         impl_elem = addSimple(group, 'implementation')
 440         impl_elem.setAttributeNS(None, 'version', src_impl.version)
 441
 442         version_modifier = buildenv.version_modifier
 443         if version_modifier:
 444                 impl_elem.setAttributeNS(None, 'version-modifier', version_modifier)
 445
 446         impl_elem.setAttributeNS(None, 'id', '..')
 447         impl_elem.setAttributeNS(None, 'released', time.strftime('%Y-%m-%d'))
 448         close(group)
 449         close(root)
 450
 451         stream = codecs.open(path, 'w', encoding = 'utf-8')
 452         try:
 453                 doc.writexml(stream)
 454         finally:
 455                 stream.close()
 456
 457 def find_broken_version_symlinks(libdir, mappings):
 458         """libdir may be a legacy -devel package containing lib* symlinks whose
 459         targets would be provided by the corresponding runtime package. If so,
 460         create fixed symlinks under $TMPDIR with the real location."""
 461         for x in os.listdir(libdir):
 462                 if x.startswith('lib') and x.endswith('.so'):
 463                         path = os.path.join(libdir, x)
 464                         if os.path.islink(path):
 465                                 target = os.readlink(path)
 466                                 if '/' not in target and not os.path.exists(os.path.join(libdir, target)):
 467                                         print "Broken link %s -> %s; will relocate..." % (x, target)
 468                                         mappings[x[3:-3]] = target
 469
 470 def set_up_mappings(mappings):
 471         """Create a temporary directory with symlinks for each of the library mappings."""
 472         libdirs = []
 473         for d in os.environ.get('LD_LIBRARY_PATH', '').split(':'):
 474                 if d: libdirs.append(d)
 475         libdirs += ['/lib', '/usr/lib']
 476
 477         def add_ldconf(config_file):
 478                 if not os.path.isfile(config_file):
 479                         return
 480                 for line in file(config_file):
 481                         d = line.strip()
 482                         if d.startswith('include '):
 483                                 glob_pattern = d.split(' ', 1)[1]
 484                                 for conf in glob.glob(glob_pattern):
 485                                         add_ldconf(conf)
 486                         elif d and not d.startswith('#'):
 487                                 libdirs.append(d)
 488         add_ldconf('/etc/ld.so.conf')
 489
 490         def find_library(name, wanted):
 491                 # Takes a short-name and target name of a library and returns
 492                 # the full path of the library.
 493                 for d in libdirs:
 494                         path = os.path.join(d, wanted)
 495                         if os.path.exists(path):
 496                                 return path
 497                 print "WARNING: library '%s' not found (searched '%s')!" % (wanted, libdirs)
 498                 return None
 499
 500         mappings_dir = os.path.join(os.environ['TMPDIR'], 'lib-mappings')
 501         os.mkdir(mappings_dir)
 502
 503         old_path = os.environ.get('LIBRARY_PATH', '')
 504         if old_path: old_path = ':' + old_path
 505         os.environ['LIBRARY_PATH'] = mappings_dir + old_path
 506
 507         for name, wanted in mappings.items():
 508                 target = find_library(name, wanted)
 509                 if target:
 510                         print "Adding mapping lib%s.so -> %s" % (name, target)
 511                         os.symlink(target, os.path.join(mappings_dir, 'lib' + name + '.so'))
 512
 513 def dup_src(fn):
 514         srcdir = os.environ['SRCDIR'] + '/'
 515         for root, dirs, files in os.walk(srcdir):
 516                 assert root.startswith(srcdir)
 517                 reldir = root[len(srcdir):]
 518                 for f in files:
 519                         target = os.path.join(reldir, f)
 520                         #print "Copy %s -> %s" % (os.path.join(root, f), target)
 521                         if os.path.exists(target):
 522                                 os.unlink(target)
 523                         fn(os.path.join(root, f), target)
 524                 for d in dirs:
 525                         target = os.path.join(reldir, d)
 526                         if not os.path.isdir(target):
 527                                 os.mkdir(target)
 528
 529 __main__.commands.append(do_build)