buildtools/wafsamba/samba_utils.py

   1 # a waf tool to add autoconf-like macros to the configure section
   2 # and for SAMBA_ macros for building libraries, binaries etc
   3
   4 import Build, os, sys, Options, Utils, Task, re, fnmatch, Logs
   5 from TaskGen import feature, before
   6 from Configure import conf
   7 from Logs import debug
   8 import shlex
   9
  10 # TODO: make this a --option
  11 LIB_PATH="shared"
  12
  13
  14 # sigh, python octal constants are a mess
  15 MODE_644 = int('644', 8)
  16 MODE_755 = int('755', 8)
  17
  18 @conf
  19 def SET_TARGET_TYPE(ctx, target, value):
  20     '''set the target type of a target'''
  21     cache = LOCAL_CACHE(ctx, 'TARGET_TYPE')
  22     if target in cache and cache[target] != 'EMPTY':
  23         Logs.error("ERROR: Target '%s' in directory %s re-defined as %s - was %s" % (target, ctx.curdir, value, cache[target]))
  24         sys.exit(1)
  25     LOCAL_CACHE_SET(ctx, 'TARGET_TYPE', target, value)
  26     debug("task_gen: Target '%s' created of type '%s' in %s" % (target, value, ctx.curdir))
  27     return True
  28
  29
  30 def GET_TARGET_TYPE(ctx, target):
  31     '''get target type from cache'''
  32     cache = LOCAL_CACHE(ctx, 'TARGET_TYPE')
  33     if not target in cache:
  34         return None
  35     return cache[target]
  36
  37
  38 ######################################################
  39 # this is used as a decorator to make functions only
  40 # run once. Based on the idea from
  41 # http://stackoverflow.com/questions/815110/is-there-a-decorator-to-simply-cache-function-return-values
  42 runonce_ret = {}
  43 def runonce(function):
  44     def runonce_wrapper(*args):
  45         if args in runonce_ret:
  46             return runonce_ret[args]
  47         else:
  48             ret = function(*args)
  49             runonce_ret[args] = ret
  50             return ret
  51     return runonce_wrapper
  52
  53
  54 def ADD_LD_LIBRARY_PATH(path):
  55     '''add something to LD_LIBRARY_PATH'''
  56     if 'LD_LIBRARY_PATH' in os.environ:
  57         oldpath = os.environ['LD_LIBRARY_PATH']
  58     else:
  59         oldpath = ''
  60     newpath = oldpath.split(':')
  61     if not path in newpath:
  62         newpath.append(path)
  63         os.environ['LD_LIBRARY_PATH'] = ':'.join(newpath)
  64
  65
  66 def needs_private_lib(bld, target):
  67     '''return True if a target links to a private library'''
  68     for lib in getattr(target, "final_libs", []):
  69         t = bld.name_to_obj(lib, bld.env)
  70         if t and getattr(t, 'private_library', False):
  71             return True
  72     return False
  73
  74
  75 def install_rpath(target):
  76     '''the rpath value for installation'''
  77     bld = target.bld
  78     bld.env['RPATH'] = []
  79     ret = set()
  80     if bld.env.RPATH_ON_INSTALL:
  81         ret.add(bld.EXPAND_VARIABLES(bld.env.LIBDIR))
  82     if bld.env.RPATH_ON_INSTALL_PRIVATE and needs_private_lib(bld, target):
  83         ret.add(bld.EXPAND_VARIABLES(bld.env.PRIVATELIBDIR))
  84     return list(ret)
  85
  86
  87 def build_rpath(bld):
  88     '''the rpath value for build'''
  89     rpaths = [os.path.normpath('%s/%s' % (bld.env.BUILD_DIRECTORY, d)) for d in ("shared", "shared/private")]
  90     bld.env['RPATH'] = []
  91     if bld.env.RPATH_ON_BUILD:
  92         return rpaths
  93     for rpath in rpaths:
  94         ADD_LD_LIBRARY_PATH(rpath)
  95     return []
  96
  97
  98 @conf
  99 def LOCAL_CACHE(ctx, name):
 100     '''return a named build cache dictionary, used to store
 101        state inside other functions'''
 102     if name in ctx.env:
 103         return ctx.env[name]
 104     ctx.env[name] = {}
 105     return ctx.env[name]
 106
 107
 108 @conf
 109 def LOCAL_CACHE_SET(ctx, cachename, key, value):
 110     '''set a value in a local cache'''
 111     cache = LOCAL_CACHE(ctx, cachename)
 112     cache[key] = value
 113
 114
 115 @conf
 116 def ASSERT(ctx, expression, msg):
 117     '''a build assert call'''
 118     if not expression:
 119         raise Utils.WafError("ERROR: %s\n" % msg)
 120 Build.BuildContext.ASSERT = ASSERT
 121
 122
 123 def SUBDIR(bld, subdir, list):
 124     '''create a list of files by pre-pending each with a subdir name'''
 125     ret = ''
 126     for l in TO_LIST(list):
 127         ret = ret + os.path.normpath(os.path.join(subdir, l)) + ' '
 128     return ret
 129 Build.BuildContext.SUBDIR = SUBDIR
 130
 131
 132 def dict_concat(d1, d2):
 133     '''concatenate two dictionaries d1 += d2'''
 134     for t in d2:
 135         if t not in d1:
 136             d1[t] = d2[t]
 137
 138
 139 def exec_command(self, cmd, **kw):
 140     '''this overrides the 'waf -v' debug output to be in a nice
 141     unix like format instead of a python list.
 142     Thanks to ita on #waf for this'''
 143     import Utils, Logs
 144     _cmd = cmd
 145     if isinstance(cmd, list):
 146         _cmd = ' '.join(cmd)
 147     debug('runner: %s' % _cmd)
 148     if self.log:
 149         self.log.write('%s\n' % cmd)
 150         kw['log'] = self.log
 151     try:
 152         if not kw.get('cwd', None):
 153             kw['cwd'] = self.cwd
 154     except AttributeError:
 155         self.cwd = kw['cwd'] = self.bldnode.abspath()
 156     return Utils.exec_command(cmd, **kw)
 157 Build.BuildContext.exec_command = exec_command
 158
 159
 160 def ADD_COMMAND(opt, name, function):
 161     '''add a new top level command to waf'''
 162     Utils.g_module.__dict__[name] = function
 163     opt.name = function
 164 Options.Handler.ADD_COMMAND = ADD_COMMAND
 165
 166
 167 @feature('cc', 'cshlib', 'cprogram')
 168 @before('apply_core','exec_rule')
 169 def process_depends_on(self):
 170     '''The new depends_on attribute for build rules
 171        allow us to specify a dependency on output from
 172        a source generation rule'''
 173     if getattr(self , 'depends_on', None):
 174         lst = self.to_list(self.depends_on)
 175         for x in lst:
 176             y = self.bld.name_to_obj(x, self.env)
 177             self.bld.ASSERT(y is not None, "Failed to find dependency %s of %s" % (x, self.name))
 178             y.post()
 179             if getattr(y, 'more_includes', None):
 180                   self.includes += " " + y.more_includes
 181
 182
 183 os_path_relpath = getattr(os.path, 'relpath', None)
 184 if os_path_relpath is None:
 185     # Python < 2.6 does not have os.path.relpath, provide a replacement
 186     # (imported from Python2.6.5~rc2)
 187     def os_path_relpath(path, start):
 188         """Return a relative version of a path"""
 189         start_list = os.path.abspath(start).split("/")
 190         path_list = os.path.abspath(path).split("/")
 191
 192         # Work out how much of the filepath is shared by start and path.
 193         i = len(os.path.commonprefix([start_list, path_list]))
 194
 195         rel_list = ['..'] * (len(start_list)-i) + path_list[i:]
 196         if not rel_list:
 197             return start
 198         return os.path.join(*rel_list)
 199
 200
 201 def unique_list(seq):
 202     '''return a uniquified list in the same order as the existing list'''
 203     seen = {}
 204     result = []
 205     for item in seq:
 206         if item in seen: continue
 207         seen[item] = True
 208         result.append(item)
 209     return result
 210
 211
 212 def TO_LIST(str, delimiter=None):
 213     '''Split a list, preserving quoted strings and existing lists'''
 214     if str is None:
 215         return []
 216     if isinstance(str, list):
 217         return str
 218     lst = str.split(delimiter)
 219     # the string may have had quotes in it, now we
 220     # check if we did have quotes, and use the slower shlex
 221     # if we need to
 222     for e in lst:
 223         if e[0] == '"':
 224             return shlex.split(str)
 225     return lst
 226
 227
 228 def subst_vars_error(string, env):
 229     '''substitute vars, throw an error if a variable is not defined'''
 230     lst = re.split('(\$\{\w+\})', string)
 231     out = []
 232     for v in lst:
 233         if re.match('\$\{\w+\}', v):
 234             vname = v[2:-1]
 235             if not vname in env:
 236                 Logs.error("Failed to find variable %s in %s" % (vname, string))
 237                 sys.exit(1)
 238             v = env[vname]
 239         out.append(v)
 240     return ''.join(out)
 241
 242
 243 @conf
 244 def SUBST_ENV_VAR(ctx, varname):
 245     '''Substitute an environment variable for any embedded variables'''
 246     return subst_vars_error(ctx.env[varname], ctx.env)
 247 Build.BuildContext.SUBST_ENV_VAR = SUBST_ENV_VAR
 248
 249
 250 def ENFORCE_GROUP_ORDERING(bld):
 251     '''enforce group ordering for the project. This
 252        makes the group ordering apply only when you specify
 253        a target with --target'''
 254     if Options.options.compile_targets:
 255         @feature('*')
 256         @before('exec_rule', 'apply_core', 'collect')
 257         def force_previous_groups(self):
 258             if getattr(self.bld, 'enforced_group_ordering', False) == True:
 259                 return
 260             self.bld.enforced_group_ordering = True
 261
 262             def group_name(g):
 263                 tm = self.bld.task_manager
 264                 return [x for x in tm.groups_names if id(tm.groups_names[x]) == id(g)][0]
 265
 266             my_id = id(self)
 267             bld = self.bld
 268             stop = None
 269             for g in bld.task_manager.groups:
 270                 for t in g.tasks_gen:
 271                     if id(t) == my_id:
 272                         stop = id(g)
 273                         debug('group: Forcing up to group %s for target %s',
 274                               group_name(g), self.name or self.target)
 275                         break
 276                 if stop != None:
 277                     break
 278             if stop is None:
 279                 return
 280
 281             for i in xrange(len(bld.task_manager.groups)):
 282                 g = bld.task_manager.groups[i]
 283                 bld.task_manager.current_group = i
 284                 if id(g) == stop:
 285                     break
 286                 debug('group: Forcing group %s', group_name(g))
 287                 for t in g.tasks_gen:
 288                     if not getattr(t, 'forced_groups', False):
 289                         debug('group: Posting %s', t.name or t.target)
 290                         t.forced_groups = True
 291                         t.post()
 292 Build.BuildContext.ENFORCE_GROUP_ORDERING = ENFORCE_GROUP_ORDERING
 293
 294
 295 def recursive_dirlist(dir, relbase, pattern=None):
 296     '''recursive directory list'''
 297     ret = []
 298     for f in os.listdir(dir):
 299         f2 = dir + '/' + f
 300         if os.path.isdir(f2):
 301             ret.extend(recursive_dirlist(f2, relbase))
 302         else:
 303             if pattern and not fnmatch.fnmatch(f, pattern):
 304                 continue
 305             ret.append(os_path_relpath(f2, relbase))
 306     return ret
 307
 308
 309 def mkdir_p(dir):
 310     '''like mkdir -p'''
 311     if not dir:
 312         return
 313     if dir.endswith("/"):
 314         mkdir_p(dir[:-1])
 315         return
 316     if os.path.isdir(dir):
 317         return
 318     mkdir_p(os.path.dirname(dir))
 319     os.mkdir(dir)
 320
 321
 322 def SUBST_VARS_RECURSIVE(string, env):
 323     '''recursively expand variables'''
 324     if string is None:
 325         return string
 326     limit=100
 327     while (string.find('${') != -1 and limit > 0):
 328         string = subst_vars_error(string, env)
 329         limit -= 1
 330     return string
 331
 332
 333 @conf
 334 def EXPAND_VARIABLES(ctx, varstr, vars=None):
 335     '''expand variables from a user supplied dictionary
 336
 337     This is most useful when you pass vars=locals() to expand
 338     all your local variables in strings
 339     '''
 340
 341     if isinstance(varstr, list):
 342         ret = []
 343         for s in varstr:
 344             ret.append(EXPAND_VARIABLES(ctx, s, vars=vars))
 345         return ret
 346
 347     if not isinstance(varstr, str):
 348         return varstr
 349
 350     import Environment
 351     env = Environment.Environment()
 352     ret = varstr
 353     # substitute on user supplied dict if avaiilable
 354     if vars is not None:
 355         for v in vars.keys():
 356             env[v] = vars[v]
 357         ret = SUBST_VARS_RECURSIVE(ret, env)
 358
 359     # if anything left, subst on the environment as well
 360     if ret.find('${') != -1:
 361         ret = SUBST_VARS_RECURSIVE(ret, ctx.env)
 362     # make sure there is nothing left. Also check for the common
 363     # typo of $( instead of ${
 364     if ret.find('${') != -1 or ret.find('$(') != -1:
 365         Logs.error('Failed to substitute all variables in varstr=%s' % ret)
 366         sys.exit(1)
 367     return ret
 368 Build.BuildContext.EXPAND_VARIABLES = EXPAND_VARIABLES
 369
 370
 371 def RUN_COMMAND(cmd,
 372                 env=None,
 373                 shell=False):
 374     '''run a external command, return exit code or signal'''
 375     if env:
 376         cmd = SUBST_VARS_RECURSIVE(cmd, env)
 377
 378     status = os.system(cmd)
 379     if os.WIFEXITED(status):
 380         return os.WEXITSTATUS(status)
 381     if os.WIFSIGNALED(status):
 382         return - os.WTERMSIG(status)
 383     Logs.error("Unknown exit reason %d for command: %s" (status, cmd))
 384     return -1
 385
 386
 387 # make sure we have md5. some systems don't have it
 388 try:
 389     from hashlib import md5
 390 except:
 391     try:
 392         import md5
 393     except:
 394         import Constants
 395         Constants.SIG_NIL = hash('abcd')
 396         class replace_md5(object):
 397             def __init__(self):
 398                 self.val = None
 399             def update(self, val):
 400                 self.val = hash((self.val, val))
 401             def digest(self):
 402                 return str(self.val)
 403             def hexdigest(self):
 404                 return self.digest().encode('hex')
 405         def replace_h_file(filename):
 406             f = open(filename, 'rb')
 407             m = replace_md5()
 408             while (filename):
 409                 filename = f.read(100000)
 410                 m.update(filename)
 411             f.close()
 412             return m.digest()
 413         Utils.md5 = replace_md5
 414         Task.md5 = replace_md5
 415         Utils.h_file = replace_h_file
 416
 417
 418 def LOAD_ENVIRONMENT():
 419     '''load the configuration environment, allowing access to env vars
 420        from new commands'''
 421     import Environment
 422     env = Environment.Environment()
 423     try:
 424         env.load('.lock-wscript')
 425         env.load(env.blddir + '/c4che/default.cache.py')
 426     except:
 427         pass
 428     return env
 429
 430
 431 def IS_NEWER(bld, file1, file2):
 432     '''return True if file1 is newer than file2'''
 433     t1 = os.stat(os.path.join(bld.curdir, file1)).st_mtime
 434     t2 = os.stat(os.path.join(bld.curdir, file2)).st_mtime
 435     return t1 > t2
 436 Build.BuildContext.IS_NEWER = IS_NEWER
 437
 438
 439 @conf
 440 def RECURSE(ctx, directory):
 441     '''recurse into a directory, relative to the curdir or top level'''
 442     try:
 443         visited_dirs = ctx.visited_dirs
 444     except:
 445         visited_dirs = ctx.visited_dirs = set()
 446     d = os.path.join(ctx.curdir, directory)
 447     if os.path.exists(d):
 448         abspath = os.path.abspath(d)
 449     else:
 450         abspath = os.path.abspath(os.path.join(Utils.g_module.srcdir, directory))
 451     ctxclass = ctx.__class__.__name__
 452     key = ctxclass + ':' + abspath
 453     if key in visited_dirs:
 454         # already done it
 455         return
 456     visited_dirs.add(key)
 457     relpath = os_path_relpath(abspath, ctx.curdir)
 458     if ctxclass == 'Handler':
 459         return ctx.sub_options(relpath)
 460     if ctxclass == 'ConfigurationContext':
 461         return ctx.sub_config(relpath)
 462     if ctxclass == 'BuildContext':
 463         return ctx.add_subdirs(relpath)
 464     Logs.error('Unknown RECURSE context class', ctxclass)
 465     raise
 466 Options.Handler.RECURSE = RECURSE
 467 Build.BuildContext.RECURSE = RECURSE
 468
 469
 470 def CHECK_MAKEFLAGS(bld):
 471     '''check for MAKEFLAGS environment variable in case we are being
 472     called from a Makefile try to honor a few make command line flags'''
 473     if not 'WAF_MAKE' in os.environ:
 474         return
 475     makeflags = os.environ.get('MAKEFLAGS')
 476     if makeflags is None:
 477         return
 478     jobs_set = False
 479     # we need to use shlex.split to cope with the escaping of spaces
 480     # in makeflags
 481     for opt in shlex.split(makeflags):
 482         # options can come either as -x or as x
 483         if opt[0:2] == 'V=':
 484             Options.options.verbose = Logs.verbose = int(opt[2:])
 485             if Logs.verbose > 0:
 486                 Logs.zones = ['runner']
 487             if Logs.verbose > 2:
 488                 Logs.zones = ['*']
 489         elif opt[0].isupper() and opt.find('=') != -1:
 490             # this allows us to set waf options on the make command line
 491             # for example, if you do "make FOO=blah", then we set the
 492             # option 'FOO' in Options.options, to blah. If you look in wafsamba/wscript
 493             # you will see that the command line accessible options have their dest=
 494             # set to uppercase, to allow for passing of options from make in this way
 495             # this is also how "make test TESTS=testpattern" works, and
 496             # "make VERBOSE=1" as well as things like "make SYMBOLCHECK=1"
 497             loc = opt.find('=')
 498             setattr(Options.options, opt[0:loc], opt[loc+1:])
 499         elif opt[0] != '-':
 500             for v in opt:
 501                 if v == 'j':
 502                     jobs_set = True
 503                 elif v == 'k':
 504                     Options.options.keep = True
 505         elif opt == '-j':
 506             jobs_set = True
 507         elif opt == '-k':
 508             Options.options.keep = True
 509     if not jobs_set:
 510         # default to one job
 511         Options.options.jobs = 1
 512
 513 Build.BuildContext.CHECK_MAKEFLAGS = CHECK_MAKEFLAGS
 514
 515 option_groups = {}
 516
 517 def option_group(opt, name):
 518     '''find or create an option group'''
 519     global option_groups
 520     if name in option_groups:
 521         return option_groups[name]
 522     gr = opt.add_option_group(name)
 523     option_groups[name] = gr
 524     return gr
 525 Options.Handler.option_group = option_group
 526
 527
 528 def save_file(filename, contents, create_dir=False):
 529     '''save data to a file'''
 530     if create_dir:
 531         mkdir_p(os.path.dirname(filename))
 532     try:
 533         f = open(filename, 'w')
 534         f.write(contents)
 535         f.close()
 536     except:
 537         return False
 538     return True
 539
 540
 541 def load_file(filename):
 542     '''return contents of a file'''
 543     try:
 544         f = open(filename, 'r')
 545         r = f.read()
 546         f.close()
 547     except:
 548         return None
 549     return r
 550
 551
 552 def reconfigure(ctx):
 553     '''rerun configure if necessary'''
 554     import Configure, samba_wildcard, Scripting
 555     if not os.path.exists(".lock-wscript"):
 556         raise Utils.WafError('configure has not been run')
 557     bld = samba_wildcard.fake_build_environment()
 558     Configure.autoconfig = True
 559     Scripting.check_configured(bld)
 560
 561
 562 def map_shlib_extension(ctx, name, python=False):
 563     '''map a filename with a shared library extension of .so to the real shlib name'''
 564     if name is None:
 565         return None
 566     if name[-1:].isdigit():
 567         # some libraries have specified versions in the wscript rule
 568         return name
 569     (root1, ext1) = os.path.splitext(name)
 570     if python:
 571         (root2, ext2) = os.path.splitext(ctx.env.pyext_PATTERN)
 572     else:
 573         (root2, ext2) = os.path.splitext(ctx.env.shlib_PATTERN)
 574     return root1+ext2
 575 Build.BuildContext.map_shlib_extension = map_shlib_extension
 576
 577 def apply_pattern(filename, pattern):
 578     '''apply a filename pattern to a filename that may have a directory component'''
 579     dirname = os.path.dirname(filename)
 580     if not dirname:
 581         return pattern % filename
 582     basename = os.path.basename(filename)
 583     return os.path.join(dirname, pattern % basename)
 584
 585 def make_libname(ctx, name, nolibprefix=False, version=None, python=False):
 586     """make a library filename
 587          Options:
 588               nolibprefix: don't include the lib prefix
 589               version    : add a version number
 590               python     : if we should use python module name conventions"""
 591
 592     if python:
 593         libname = apply_pattern(name, ctx.env.pyext_PATTERN)
 594     else:
 595         libname = apply_pattern(name, ctx.env.shlib_PATTERN)
 596     if nolibprefix and libname[0:3] == 'lib':
 597         libname = libname[3:]
 598     if version:
 599         if version[0] == '.':
 600             version = version[1:]
 601         (root, ext) = os.path.splitext(libname)
 602         if ext == ".dylib":
 603             # special case - version goes before the prefix
 604             libname = "%s.%s%s" % (root, version, ext)
 605         else:
 606             libname = "%s%s.%s" % (root, ext, version)
 607     return libname
 608 Build.BuildContext.make_libname = make_libname
 609
 610
 611 def get_tgt_list(bld):
 612     '''return a list of build objects for samba'''
 613
 614     targets = LOCAL_CACHE(bld, 'TARGET_TYPE')
 615
 616     # build a list of task generators we are interested in
 617     tgt_list = []
 618     for tgt in targets:
 619         type = targets[tgt]
 620         if not type in ['SUBSYSTEM', 'MODULE', 'BINARY', 'LIBRARY', 'ASN1', 'PYTHON']:
 621             continue
 622         t = bld.name_to_obj(tgt, bld.env)
 623         if t is None:
 624             Logs.error("Target %s of type %s has no task generator" % (tgt, type))
 625             sys.exit(1)
 626         tgt_list.append(t)
 627     return tgt_list