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
   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 @conf
  15 def SET_TARGET_TYPE(ctx, target, value):
  16     '''set the target type of a target'''
  17     cache = LOCAL_CACHE(ctx, 'TARGET_TYPE')
  18     if target in cache:
  19         ASSERT(ctx, cache[target] == value,
  20                "Target '%s' re-defined as %s - was %s" % (target, value, cache[target]))
  21         debug("task_gen: Skipping duplicate target %s (curdir=%s)" % (target, ctx.curdir))
  22         return False
  23     LOCAL_CACHE_SET(ctx, 'TARGET_TYPE', target, value)
  24     debug("task_gen: Target '%s' created of type '%s' in %s" % (target, value, ctx.curdir))
  25     return True
  26
  27
  28 def GET_TARGET_TYPE(ctx, target):
  29     '''get target type from cache'''
  30     cache = LOCAL_CACHE(ctx, 'TARGET_TYPE')
  31     if not target in cache:
  32         return None
  33     return cache[target]
  34
  35
  36 ######################################################
  37 # this is used as a decorator to make functions only
  38 # run once. Based on the idea from
  39 # http://stackoverflow.com/questions/815110/is-there-a-decorator-to-simply-cache-function-return-values
  40 runonce_ret = {}
  41 def runonce(function):
  42     def runonce_wrapper(*args):
  43         if args in runonce_ret:
  44             return runonce_ret[args]
  45         else:
  46             ret = function(*args)
  47             runonce_ret[args] = ret
  48             return ret
  49     return runonce_wrapper
  50
  51
  52 def ADD_LD_LIBRARY_PATH(path):
  53     '''add something to LD_LIBRARY_PATH'''
  54     if 'LD_LIBRARY_PATH' in os.environ:
  55         oldpath = os.environ['LD_LIBRARY_PATH']
  56     else:
  57         oldpath = ''
  58     newpath = oldpath.split(':')
  59     if not path in newpath:
  60         newpath.append(path)
  61         os.environ['LD_LIBRARY_PATH'] = ':'.join(newpath)
  62
  63
  64 def install_rpath(bld):
  65     '''the rpath value for installation'''
  66     bld.env['RPATH'] = []
  67     bld.env['RPATH_ST'] = []
  68     if bld.env.RPATH_ON_INSTALL:
  69         return ['-Wl,-rpath=%s/lib' % bld.env.PREFIX]
  70     return []
  71
  72
  73 def build_rpath(bld):
  74     '''the rpath value for build'''
  75     rpath = os.path.normpath('%s/%s' % (bld.env['BUILD_DIRECTORY'], LIB_PATH))
  76     bld.env['RPATH'] = []
  77     bld.env['RPATH_ST'] = []
  78     if bld.env.RPATH_ON_BUILD:
  79         return ['-Wl,-rpath=%s' % rpath]
  80     ADD_LD_LIBRARY_PATH(rpath)
  81     return []
  82
  83
  84 @conf
  85 def LOCAL_CACHE(ctx, name):
  86     '''return a named build cache dictionary, used to store
  87        state inside other functions'''
  88     if name in ctx.env:
  89         return ctx.env[name]
  90     ctx.env[name] = {}
  91     return ctx.env[name]
  92
  93
  94 @conf
  95 def LOCAL_CACHE_SET(ctx, cachename, key, value):
  96     '''set a value in a local cache'''
  97     cache = LOCAL_CACHE(ctx, cachename)
  98     cache[key] = value
  99
 100
 101 @conf
 102 def ASSERT(ctx, expression, msg):
 103     '''a build assert call'''
 104     if not expression:
 105         sys.stderr.write("ERROR: %s\n" % msg)
 106         raise AssertionError
 107 Build.BuildContext.ASSERT = ASSERT
 108
 109
 110 def SUBDIR(bld, subdir, list):
 111     '''create a list of files by pre-pending each with a subdir name'''
 112     ret = ''
 113     for l in TO_LIST(list):
 114         ret = ret + os.path.normpath(os.path.join(subdir, l)) + ' '
 115     return ret
 116 Build.BuildContext.SUBDIR = SUBDIR
 117
 118
 119 def dict_concat(d1, d2):
 120     '''concatenate two dictionaries d1 += d2'''
 121     for t in d2:
 122         if t not in d1:
 123             d1[t] = d2[t]
 124
 125
 126 def exec_command(self, cmd, **kw):
 127     '''this overrides the 'waf -v' debug output to be in a nice
 128     unix like format instead of a python list.
 129     Thanks to ita on #waf for this'''
 130     import Utils, Logs
 131     _cmd = cmd
 132     if isinstance(cmd, list):
 133         _cmd = ' '.join(cmd)
 134     debug('runner: %s' % _cmd)
 135     if self.log:
 136         self.log.write('%s\n' % cmd)
 137         kw['log'] = self.log
 138     try:
 139         if not kw.get('cwd', None):
 140             kw['cwd'] = self.cwd
 141     except AttributeError:
 142         self.cwd = kw['cwd'] = self.bldnode.abspath()
 143     return Utils.exec_command(cmd, **kw)
 144 Build.BuildContext.exec_command = exec_command
 145
 146
 147 def ADD_COMMAND(opt, name, function):
 148     '''add a new top level command to waf'''
 149     Utils.g_module.__dict__[name] = function
 150     opt.name = function
 151 Options.Handler.ADD_COMMAND = ADD_COMMAND
 152
 153
 154 @feature('cc', 'cshlib', 'cprogram')
 155 @before('apply_core','exec_rule')
 156 def process_depends_on(self):
 157     '''The new depends_on attribute for build rules
 158        allow us to specify a dependency on output from
 159        a source generation rule'''
 160     if getattr(self , 'depends_on', None):
 161         lst = self.to_list(self.depends_on)
 162         for x in lst:
 163             y = self.bld.name_to_obj(x, self.env)
 164             self.bld.ASSERT(y is not None, "Failed to find dependency %s of %s" % (x, self.name))
 165             y.post()
 166             if getattr(y, 'more_includes', None):
 167                   self.includes += " " + y.more_includes
 168
 169
 170 os_path_relpath = getattr(os.path, 'relpath', None)
 171 if os_path_relpath is None:
 172     # Python < 2.6 does not have os.path.relpath, provide a replacement
 173     # (imported from Python2.6.5~rc2)
 174     def os_path_relpath(path, start):
 175         """Return a relative version of a path"""
 176         start_list = os.path.abspath(start).split("/")
 177         path_list = os.path.abspath(path).split("/")
 178
 179         # Work out how much of the filepath is shared by start and path.
 180         i = len(os.path.commonprefix([start_list, path_list]))
 181
 182         rel_list = ['..'] * (len(start_list)-i) + path_list[i:]
 183         if not rel_list:
 184             return start
 185         return os.path.join(*rel_list)
 186
 187
 188 def unique_list(seq):
 189     '''return a uniquified list in the same order as the existing list'''
 190     seen = {}
 191     result = []
 192     for item in seq:
 193         if item in seen: continue
 194         seen[item] = True
 195         result.append(item)
 196     return result
 197
 198
 199 def TO_LIST(str):
 200     '''Split a list, preserving quoted strings and existing lists'''
 201     if str is None:
 202         return []
 203     if isinstance(str, list):
 204         return str
 205     lst = str.split()
 206     # the string may have had quotes in it, now we
 207     # check if we did have quotes, and use the slower shlex
 208     # if we need to
 209     for e in lst:
 210         if e[0] == '"':
 211             return shlex.split(str)
 212     return lst
 213
 214
 215 def subst_vars_error(string, env):
 216     '''substitute vars, throw an error if a variable is not defined'''
 217     lst = re.split('(\$\{\w+\})', string)
 218     out = []
 219     for v in lst:
 220         if re.match('\$\{\w+\}', v):
 221             vname = v[2:-1]
 222             if not vname in env:
 223                 print "Failed to find variable %s in %s" % (vname, string)
 224                 sys.exit(1)
 225             v = env[vname]
 226         out.append(v)
 227     return ''.join(out)
 228
 229
 230 @conf
 231 def SUBST_ENV_VAR(ctx, varname):
 232     '''Substitute an environment variable for any embedded variables'''
 233     return subst_vars_error(ctx.env[varname], ctx.env)
 234 Build.BuildContext.SUBST_ENV_VAR = SUBST_ENV_VAR
 235
 236
 237 def ENFORCE_GROUP_ORDERING(bld):
 238     '''enforce group ordering for the project. This
 239        makes the group ordering apply only when you specify
 240        a target with --target'''
 241     if Options.options.compile_targets:
 242         @feature('*')
 243         def force_previous_groups(self):
 244             if getattr(self.bld, 'enforced_group_ordering', False) == True:
 245                 return
 246             self.bld.enforced_group_ordering = True
 247
 248             def group_name(g):
 249                 tm = self.bld.task_manager
 250                 return [x for x in tm.groups_names if id(tm.groups_names[x]) == id(g)][0]
 251
 252             my_id = id(self)
 253             bld = self.bld
 254             stop = None
 255             for g in bld.task_manager.groups:
 256                 for t in g.tasks_gen:
 257                     if id(t) == my_id:
 258                         stop = id(g)
 259                         debug('group: Forcing up to group %s', group_name(g))
 260                         break
 261                 if stop != None:
 262                     break
 263             if stop is None:
 264                 return
 265
 266             for g in bld.task_manager.groups:
 267                 if id(g) == stop:
 268                     break
 269                 debug('group: Forcing group %s', group_name(g))
 270                 for t in g.tasks_gen:
 271                     if getattr(t, 'forced_groups', False) != True:
 272                         debug('group: Posting %s', t.name or t.target)
 273                         t.forced_groups = True
 274                         t.post()
 275 Build.BuildContext.ENFORCE_GROUP_ORDERING = ENFORCE_GROUP_ORDERING
 276
 277
 278 def recursive_dirlist(dir, relbase, pattern=None):
 279     '''recursive directory list'''
 280     ret = []
 281     for f in os.listdir(dir):
 282         f2 = dir + '/' + f
 283         if os.path.isdir(f2):
 284             ret.extend(recursive_dirlist(f2, relbase))
 285         else:
 286             if pattern and not fnmatch.fnmatch(f, pattern):
 287                 continue
 288             ret.append(os_path_relpath(f2, relbase))
 289     return ret
 290
 291
 292 def mkdir_p(dir):
 293     '''like mkdir -p'''
 294     if os.path.isdir(dir):
 295         return
 296     mkdir_p(os.path.dirname(dir))
 297     os.mkdir(dir)
 298
 299
 300 def SUBST_VARS_RECURSIVE(string, env):
 301     '''recursively expand variables'''
 302     if string is None:
 303         return string
 304     limit=100
 305     while (string.find('${') != -1 and limit > 0):
 306         string = subst_vars_error(string, env)
 307         limit -= 1
 308     return string
 309
 310
 311 @conf
 312 def EXPAND_VARIABLES(ctx, varstr, vars=None):
 313     '''expand variables from a user supplied dictionary
 314
 315     This is most useful when you pass vars=locals() to expand
 316     all your local variables in strings
 317     '''
 318
 319     if isinstance(varstr, list):
 320         ret = []
 321         for s in varstr:
 322             ret.append(EXPAND_VARIABLES(ctx, s, vars=vars))
 323         return ret
 324
 325     import Environment
 326     env = Environment.Environment()
 327     ret = varstr
 328     # substitute on user supplied dict if avaiilable
 329     if vars is not None:
 330         for v in vars.keys():
 331             env[v] = vars[v]
 332         ret = SUBST_VARS_RECURSIVE(ret, env)
 333
 334     # if anything left, subst on the environment as well
 335     if ret.find('${') != -1:
 336         ret = SUBST_VARS_RECURSIVE(ret, ctx.env)
 337     # make sure there is nothing left. Also check for the common
 338     # typo of $( instead of ${
 339     if ret.find('${') != -1 or ret.find('$(') != -1:
 340         print('Failed to substitute all variables in varstr=%s' % ret)
 341         sys.exit(1)
 342     return ret
 343 Build.BuildContext.EXPAND_VARIABLES = EXPAND_VARIABLES
 344
 345
 346 def RUN_COMMAND(cmd,
 347                 env=None,
 348                 shell=False):
 349     '''run a external command, return exit code or signal'''
 350     if env:
 351         cmd = SUBST_VARS_RECURSIVE(cmd, env)
 352
 353     status = os.system(cmd)
 354     if os.WIFEXITED(status):
 355         return os.WEXITSTATUS(status)
 356     if os.WIFSIGNALED(status):
 357         return - os.WTERMSIG(status)
 358     print "Unknown exit reason %d for command: %s" (status, cmd)
 359     return -1
 360
 361
 362 # make sure we have md5. some systems don't have it
 363 try:
 364     from hashlib import md5
 365 except:
 366     try:
 367         import md5
 368     except:
 369         import Constants
 370         Constants.SIG_NIL = hash('abcd')
 371         class replace_md5(object):
 372             def __init__(self):
 373                 self.val = None
 374             def update(self, val):
 375                 self.val = hash((self.val, val))
 376             def digest(self):
 377                 return str(self.val)
 378             def hexdigest(self):
 379                 return self.digest().encode('hex')
 380         def replace_h_file(filename):
 381             f = open(filename, 'rb')
 382             m = replace_md5()
 383             while (filename):
 384                 filename = f.read(100000)
 385                 m.update(filename)
 386             f.close()
 387             return m.digest()
 388         Utils.md5 = replace_md5
 389         Task.md5 = replace_md5
 390         Utils.h_file = replace_h_file
 391
 392
 393 def LOAD_ENVIRONMENT():
 394     '''load the configuration environment, allowing access to env vars
 395        from new commands'''
 396     import Environment
 397     env = Environment.Environment()
 398     env.load('bin/c4che/default.cache.py')
 399     return env
 400
 401
 402 def IS_NEWER(bld, file1, file2):
 403     '''return True if file1 is newer than file2'''
 404     t1 = os.stat(os.path.join(bld.curdir, file1)).st_mtime
 405     t2 = os.stat(os.path.join(bld.curdir, file2)).st_mtime
 406     return t1 > t2
 407 Build.BuildContext.IS_NEWER = IS_NEWER
 408