buildtools/wafsamba/samba_bundled.py

   1 # functions to support bundled libraries
   2
   3 import sys
   4 from waflib import Build, Options, Logs
   5 from waflib.Configure import conf
   6 from wafsamba import samba_utils
   7
   8 def PRIVATE_NAME(bld, name, private_extension, private_library):
   9     '''possibly rename a library to include a bundled extension'''
  10
  11     if not private_library:
  12         return name
  13
  14     # we now use the same private name for libraries as the public name.
  15     # see http://git.samba.org/?p=tridge/junkcode.git;a=tree;f=shlib for a
  16     # demonstration that this is the right thing to do
  17     # also see http://lists.samba.org/archive/samba-technical/2011-January/075816.html
  18     if private_extension:
  19         return name
  20
  21     extension = bld.env.PRIVATE_EXTENSION
  22
  23     if extension and name.startswith('%s' % extension):
  24         return name
  25
  26     if extension and name.endswith('%s' % extension):
  27         return name
  28
  29     return "%s-%s" % (name, extension)
  30
  31
  32 def target_in_list(target, lst, default):
  33     for l in lst:
  34         if target == l:
  35             return True
  36         if '!' + target == l:
  37             return False
  38         if l == 'ALL':
  39             return True
  40         if l == 'NONE':
  41             return False
  42     return default
  43
  44
  45 def BUILTIN_LIBRARY(bld, name):
  46     '''return True if a library should be builtin
  47        instead of being built as a shared lib'''
  48     return target_in_list(name, bld.env.BUILTIN_LIBRARIES, False)
  49 Build.BuildContext.BUILTIN_LIBRARY = BUILTIN_LIBRARY
  50
  51
  52 def BUILTIN_DEFAULT(opt, builtins):
  53     '''set a comma separated default list of builtin libraries for this package'''
  54     if 'BUILTIN_LIBRARIES_DEFAULT' in Options.options.__dict__:
  55         return
  56     Options.options.__dict__['BUILTIN_LIBRARIES_DEFAULT'] = builtins
  57 Options.OptionsContext.BUILTIN_DEFAULT = BUILTIN_DEFAULT
  58
  59
  60 def PRIVATE_EXTENSION_DEFAULT(opt, extension, noextension=''):
  61     '''set a default private library extension'''
  62     if 'PRIVATE_EXTENSION_DEFAULT' in Options.options.__dict__:
  63         return
  64     Options.options.__dict__['PRIVATE_EXTENSION_DEFAULT'] = extension
  65     Options.options.__dict__['PRIVATE_EXTENSION_EXCEPTION'] = noextension
  66 Options.OptionsContext.PRIVATE_EXTENSION_DEFAULT = PRIVATE_EXTENSION_DEFAULT
  67
  68
  69 def minimum_library_version(conf, libname, default):
  70     '''allow override of mininum system library version'''
  71
  72     minlist = Options.options.MINIMUM_LIBRARY_VERSION
  73     if not minlist:
  74         return default
  75
  76     for m in minlist.split(','):
  77         a = m.split(':')
  78         if len(a) != 2:
  79             Logs.error("Bad syntax for --minimum-library-version of %s" % m)
  80             sys.exit(1)
  81         if a[0] == libname:
  82             return a[1]
  83     return default
  84
  85
  86 @conf
  87 def LIB_MAY_BE_BUNDLED(conf, libname):
  88     if libname in conf.env.SYSTEM_LIBS:
  89         return False
  90     if libname in conf.env.BUNDLED_LIBS:
  91         return True
  92     if '!%s' % libname in conf.env.BUNDLED_LIBS:
  93         return False
  94     if 'NONE' in conf.env.BUNDLED_LIBS:
  95         return False
  96     return True
  97
  98 @conf
  99 def LIB_MUST_BE_BUNDLED(conf, libname):
 100     if libname in conf.env.BUNDLED_LIBS:
 101         return True
 102     if '!%s' % libname in conf.env.BUNDLED_LIBS:
 103         return False
 104     if 'ALL' in conf.env.BUNDLED_LIBS:
 105         return True
 106     return False
 107
 108 @conf
 109 def LIB_MUST_BE_PRIVATE(conf, libname):
 110     return ('ALL' in conf.env.PRIVATE_LIBS or
 111             libname in conf.env.PRIVATE_LIBS)
 112
 113 @conf
 114 def CHECK_BUNDLED_SYSTEM_PKG(conf, libname, minversion='0.0.0',
 115         maxversion=None, version_blacklist=[],
 116         onlyif=None, implied_deps=None, pkg=None):
 117     '''check if a library is available as a system library.
 118
 119     This only tries using pkg-config
 120     '''
 121     return conf.CHECK_BUNDLED_SYSTEM(libname,
 122                                      minversion=minversion,
 123                                      maxversion=maxversion,
 124                                      version_blacklist=version_blacklist,
 125                                      onlyif=onlyif,
 126                                      implied_deps=implied_deps,
 127                                      pkg=pkg)
 128
 129 @conf
 130 def CHECK_BUNDLED_SYSTEM(conf, libname, minversion='0.0.0',
 131                          maxversion=None, version_blacklist=[],
 132                          checkfunctions=None, headers=None, checkcode=None,
 133                          onlyif=None, implied_deps=None,
 134                          require_headers=True, pkg=None, set_target=True):
 135     '''check if a library is available as a system library.
 136     this first tries via pkg-config, then if that fails
 137     tries by testing for a specified function in the specified lib
 138     '''
 139     # We always do a logic validation of 'onlyif' first
 140     missing = []
 141     if onlyif:
 142         for l in samba_utils.TO_LIST(onlyif):
 143             f = 'FOUND_SYSTEMLIB_%s' % l
 144             if not f in conf.env:
 145                 Logs.error('ERROR: CHECK_BUNDLED_SYSTEM(%s) - ' % (libname) +
 146                            'missing prerequisite check for ' +
 147                            'system library %s, onlyif=%r' % (l, onlyif))
 148                 sys.exit(1)
 149             if not conf.env[f]:
 150                 missing.append(l)
 151     found = 'FOUND_SYSTEMLIB_%s' % libname
 152     if found in conf.env:
 153         return conf.env[found]
 154     if conf.LIB_MUST_BE_BUNDLED(libname):
 155         conf.env[found] = False
 156         return False
 157
 158     # see if the library should only use a system version if another dependent
 159     # system version is found. That prevents possible use of mixed library
 160     # versions
 161     if missing:
 162         if not conf.LIB_MAY_BE_BUNDLED(libname):
 163             Logs.error('ERROR: Use of system library %s depends on missing system library/libraries %r' % (libname, missing))
 164             sys.exit(1)
 165         conf.env[found] = False
 166         return False
 167
 168     def check_functions_headers_code():
 169         '''helper function for CHECK_BUNDLED_SYSTEM'''
 170         if require_headers and headers and not conf.CHECK_HEADERS(headers, lib=libname):
 171             return False
 172         if checkfunctions is not None:
 173             ok = conf.CHECK_FUNCS_IN(checkfunctions, libname, headers=headers,
 174                                      empty_decl=False, set_target=False)
 175             if not ok:
 176                 return False
 177         if checkcode is not None:
 178             define='CHECK_BUNDLED_SYSTEM_%s' % libname.upper()
 179             ok = conf.CHECK_CODE(checkcode, lib=libname,
 180                                  headers=headers, local_include=False,
 181                                  msg=msg, define=define)
 182             conf.CONFIG_RESET(define)
 183             if not ok:
 184                 return False
 185         return True
 186
 187     minversion = minimum_library_version(conf, libname, minversion)
 188
 189     msg = 'Checking for system %s' % libname
 190     msg_ver = []
 191     if minversion != '0.0.0':
 192         msg_ver.append('>=%s' % minversion)
 193     if maxversion is not None:
 194         msg_ver.append('<=%s' % maxversion)
 195     for v in version_blacklist:
 196         msg_ver.append('!=%s' % v)
 197     if msg_ver != []:
 198         msg += " (%s)" % (" ".join(msg_ver))
 199
 200     uselib_store=libname.upper()
 201     if pkg is None:
 202         pkg = libname
 203
 204     version_checks = '%s >= %s' % (pkg, minversion)
 205     if maxversion is not None:
 206         version_checks += ' %s <= %s' % (pkg, maxversion)
 207
 208     version_checks += "".join(' %s != %s' % (pkg, v) for v in version_blacklist)
 209
 210     # try pkgconfig first
 211     if (conf.CHECK_CFG(package=pkg,
 212                       args='"%s" --cflags --libs' % (version_checks),
 213                       msg=msg, uselib_store=uselib_store) and
 214         check_functions_headers_code()):
 215         if set_target:
 216             conf.SET_TARGET_TYPE(libname, 'SYSLIB')
 217         conf.env[found] = True
 218         if implied_deps:
 219             conf.SET_SYSLIB_DEPS(libname, implied_deps)
 220         return True
 221     if checkfunctions is not None:
 222         if check_functions_headers_code():
 223             conf.env[found] = True
 224             if implied_deps:
 225                 conf.SET_SYSLIB_DEPS(libname, implied_deps)
 226             if set_target:
 227                 conf.SET_TARGET_TYPE(libname, 'SYSLIB')
 228             return True
 229     conf.env[found] = False
 230     if not conf.LIB_MAY_BE_BUNDLED(libname):
 231         Logs.error('ERROR: System library %s of version %s not found, and bundling disabled' % (libname, minversion))
 232         sys.exit(1)
 233     return False
 234
 235
 236 def tuplize_version(version):
 237     return tuple([int(x) for x in version.split(".")])
 238
 239 @conf
 240 def CHECK_BUNDLED_SYSTEM_PYTHON(conf, libname, modulename, minversion='0.0.0'):
 241     '''check if a python module is available on the system and
 242     has the specified minimum version.
 243     '''
 244     if conf.LIB_MUST_BE_BUNDLED(libname):
 245         return False
 246
 247     # see if the library should only use a system version if another dependent
 248     # system version is found. That prevents possible use of mixed library
 249     # versions
 250     minversion = minimum_library_version(conf, libname, minversion)
 251
 252     try:
 253         m = __import__(modulename)
 254     except ImportError:
 255         found = False
 256     else:
 257         try:
 258             version = m.__version__
 259         except AttributeError:
 260             found = False
 261         else:
 262             found = tuplize_version(version) >= tuplize_version(minversion)
 263     if not found and not conf.LIB_MAY_BE_BUNDLED(libname):
 264         Logs.error('ERROR: Python module %s of version %s not found, and bundling disabled' % (libname, minversion))
 265         sys.exit(1)
 266     return found
 267
 268
 269 def NONSHARED_BINARY(bld, name):
 270     '''return True if a binary should be built without non-system shared libs'''
 271     return target_in_list(name, bld.env.NONSHARED_BINARIES, False)
 272 Build.BuildContext.NONSHARED_BINARY = NONSHARED_BINARY
 273
 274