scons/custom.py

   1 """custom
   2
   3 Custom builders and methods.
   4
   5 """
   6
   7 #
   8 # Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   9 # All Rights Reserved.
  10 #
  11 # Permission is hereby granted, free of charge, to any person obtaining a
  12 # copy of this software and associated documentation files (the
  13 # "Software"), to deal in the Software without restriction, including
  14 # without limitation the rights to use, copy, modify, merge, publish,
  15 # distribute, sub license, and/or sell copies of the Software, and to
  16 # permit persons to whom the Software is furnished to do so, subject to
  17 # the following conditions:
  18 #
  19 # The above copyright notice and this permission notice (including the
  20 # next paragraph) shall be included in all copies or substantial portions
  21 # of the Software.
  22 #
  23 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  24 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  26 # IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  27 # ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  28 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  29 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 #
  31
  32
  33 import os
  34 import os.path
  35 import re
  36 import sys
  37 import subprocess
  38
  39 import SCons.Action
  40 import SCons.Builder
  41 import SCons.Scanner
  42
  43 import fixes
  44
  45
  46 def quietCommandLines(env):
  47     # Quiet command lines
  48     # See also http://www.scons.org/wiki/HidingCommandLinesInOutput
  49     env['ASCOMSTR'] = "  Assembling $SOURCE ..."
  50     env['ASPPCOMSTR'] = "  Assembling $SOURCE ..."
  51     env['CCCOMSTR'] = "  Compiling $SOURCE ..."
  52     env['SHCCCOMSTR'] = "  Compiling $SOURCE ..."
  53     env['CXXCOMSTR'] = "  Compiling $SOURCE ..."
  54     env['SHCXXCOMSTR'] = "  Compiling $SOURCE ..."
  55     env['ARCOMSTR'] = "  Archiving $TARGET ..."
  56     env['RANLIBCOMSTR'] = "  Indexing $TARGET ..."
  57     env['LINKCOMSTR'] = "  Linking $TARGET ..."
  58     env['SHLINKCOMSTR'] = "  Linking $TARGET ..."
  59     env['LDMODULECOMSTR'] = "  Linking $TARGET ..."
  60     env['SWIGCOMSTR'] = "  Generating $TARGET ..."
  61     env['LEXCOMSTR'] = "  Generating $TARGET ..."
  62     env['YACCCOMSTR'] = "  Generating $TARGET ..."
  63     env['CODEGENCOMSTR'] = "  Generating $TARGET ..."
  64     env['INSTALLSTR'] = "  Installing $TARGET ..."
  65
  66
  67 def createConvenienceLibBuilder(env):
  68     """This is a utility function that creates the ConvenienceLibrary
  69     Builder in an Environment if it is not there already.
  70
  71     If it is already there, we return the existing one.
  72
  73     Based on the stock StaticLibrary and SharedLibrary builders.
  74     """
  75
  76     try:
  77         convenience_lib = env['BUILDERS']['ConvenienceLibrary']
  78     except KeyError:
  79         action_list = [ SCons.Action.Action("$ARCOM", "$ARCOMSTR") ]
  80         if env.Detect('ranlib'):
  81             ranlib_action = SCons.Action.Action("$RANLIBCOM", "$RANLIBCOMSTR")
  82             action_list.append(ranlib_action)
  83
  84         convenience_lib = SCons.Builder.Builder(action = action_list,
  85                                   emitter = '$LIBEMITTER',
  86                                   prefix = '$LIBPREFIX',
  87                                   suffix = '$LIBSUFFIX',
  88                                   src_suffix = '$SHOBJSUFFIX',
  89                                   src_builder = 'SharedObject')
  90         env['BUILDERS']['ConvenienceLibrary'] = convenience_lib
  91
  92     return convenience_lib
  93
  94
  95 # TODO: handle import statements with multiple modules
  96 # TODO: handle from import statements
  97 import_re = re.compile(r'^import\s+(\S+)$', re.M)
  98
  99 def python_scan(node, env, path):
 100     # http://www.scons.org/doc/0.98.5/HTML/scons-user/c2781.html#AEN2789
 101     contents = node.get_contents()
 102     source_dir = node.get_dir()
 103     imports = import_re.findall(contents)
 104     results = []
 105     for imp in imports:
 106         for dir in path:
 107             file = os.path.join(str(dir), imp.replace('.', os.sep) + '.py')
 108             if os.path.exists(file):
 109                 results.append(env.File(file))
 110                 break
 111             file = os.path.join(str(dir), imp.replace('.', os.sep), '__init__.py')
 112             if os.path.exists(file):
 113                 results.append(env.File(file))
 114                 break
 115     return results
 116
 117 python_scanner = SCons.Scanner.Scanner(function = python_scan, skeys = ['.py'])
 118
 119
 120 def code_generate(env, script, target, source, command):
 121     """Method to simplify code generation via python scripts.
 122
 123     http://www.scons.org/wiki/UsingCodeGenerators
 124     http://www.scons.org/doc/0.98.5/HTML/scons-user/c2768.html
 125     """
 126
 127     # We're generating code using Python scripts, so we have to be
 128     # careful with our scons elements.  This entry represents
 129     # the generator file *in the source directory*.
 130     script_src = env.File(script).srcnode()
 131
 132     # This command creates generated code *in the build directory*.
 133     command = command.replace('$SCRIPT', script_src.path)
 134     action = SCons.Action.Action(command, "$CODEGENCOMSTR")
 135     code = env.Command(target, source, action)
 136
 137     # Explicitly mark that the generated code depends on the generator,
 138     # and on implicitly imported python modules
 139     path = (script_src.get_dir(),)
 140     deps = [script_src]
 141     deps += script_src.get_implicit_deps(env, python_scanner, path)
 142     env.Depends(code, deps)
 143
 144     # Running the Python script causes .pyc files to be generated in the
 145     # source directory.  When we clean up, they should go too. So add side
 146     # effects for .pyc files
 147     for dep in deps:
 148         pyc = env.File(str(dep) + 'c')
 149         env.SideEffect(pyc, code)
 150
 151     return code
 152
 153
 154 def createCodeGenerateMethod(env):
 155     env.Append(SCANNERS = python_scanner)
 156     env.AddMethod(code_generate, 'CodeGenerate')
 157
 158
 159 def _pkg_check_modules(env, name, modules):
 160     '''Simple wrapper for pkg-config.'''
 161
 162     env['HAVE_' + name] = False
 163
 164     # For backwards compatability
 165     env[name.lower()] = False
 166
 167     if env['platform'] == 'windows':
 168         return
 169
 170     if not env.Detect('pkg-config'):
 171         return
 172
 173     if subprocess.call(["pkg-config", "--exists", ' '.join(modules)]) != 0:
 174         return
 175
 176     # Other flags may affect the compilation of unrelated targets, so store
 177     # them with a prefix, (e.g., XXX_CFLAGS, XXX_LIBS, etc)
 178     try:
 179         flags = env.ParseFlags('!pkg-config --cflags --libs ' + ' '.join(modules))
 180     except OSError:
 181         return
 182     prefix = name + '_'
 183     for flag_name, flag_value in flags.iteritems():
 184         assert '_' not in flag_name
 185         env[prefix + flag_name] = flag_value
 186
 187     env['HAVE_' + name] = True
 188
 189 def pkg_check_modules(env, name, modules):
 190
 191     sys.stdout.write('Checking for %s...' % name)
 192     _pkg_check_modules(env, name, modules)
 193     result = env['HAVE_' + name]
 194     sys.stdout.write(' %s\n' % ['no', 'yes'][int(bool(result))])
 195
 196     # XXX: For backwards compatability
 197     env[name.lower()] = result
 198
 199
 200 def pkg_use_modules(env, names):
 201     '''Search for all environment flags that match NAME_FOO and append them to
 202     the FOO environment variable.'''
 203
 204     names = env.Flatten(names)
 205
 206     for name in names:
 207         prefix = name + '_'
 208
 209         if not 'HAVE_' + name in env:
 210             print 'Attempt to use unknown module %s' % name
 211             env.Exit(1)
 212
 213         if not env['HAVE_' + name]:
 214             print 'Attempt to use unavailable module %s' % name
 215             env.Exit(1)
 216
 217         flags = {}
 218         for flag_name, flag_value in env.Dictionary().iteritems():
 219             if flag_name.startswith(prefix):
 220                 flag_name = flag_name[len(prefix):]
 221                 if '_' not in flag_name:
 222                     flags[flag_name] = flag_value
 223         if flags:
 224             env.MergeFlags(flags)
 225
 226
 227 def createPkgConfigMethods(env):
 228     env.AddMethod(pkg_check_modules, 'PkgCheckModules')
 229     env.AddMethod(pkg_use_modules, 'PkgUseModules')
 230
 231
 232 def generate(env):
 233     """Common environment generation code"""
 234
 235     verbose = env.get('verbose', False) or not env.get('quiet', True)
 236     if not verbose:
 237         quietCommandLines(env)
 238
 239     # Custom builders and methods
 240     createConvenienceLibBuilder(env)
 241     createCodeGenerateMethod(env)
 242     createPkgConfigMethods(env)
 243
 244     # for debugging
 245     #print env.Dump()
 246
 247
 248 def exists(env):
 249     return 1