build/ConfigStatus.py

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this
   3 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 # Combined with build/autoconf/config.status.m4, ConfigStatus is an almost
   6 # drop-in replacement for autoconf 2.13's config.status, with features
   7 # borrowed from autoconf > 2.5, and additional features.
   8
   9 from __future__ import print_function
  10
  11 import logging
  12 import os
  13 import sys
  14
  15 from optparse import OptionParser
  16
  17 from mach.logging import LoggingManager
  18 from mozbuild.backend.configenvironment import ConfigEnvironment
  19 from mozbuild.backend.recursivemake import RecursiveMakeBackend
  20 from mozbuild.frontend.emitter import TreeMetadataEmitter
  21 from mozbuild.frontend.reader import BuildReader
  22 from mozbuild.mozinfo import write_mozinfo
  23
  24
  25 log_manager = LoggingManager()
  26
  27
  28 def config_status(topobjdir='.', topsrcdir='.',
  29         defines=[], non_global_defines=[], substs=[]):
  30     '''Main function, providing config.status functionality.
  31
  32     Contrary to config.status, it doesn't use CONFIG_FILES or CONFIG_HEADERS
  33     variables.
  34
  35     Without the -n option, this program acts as config.status and considers
  36     the current directory as the top object directory, even when config.status
  37     is in a different directory. It will, however, treat the directory
  38     containing config.status as the top object directory with the -n option.
  39
  40     The --recheck option, like with the original config.status, runs configure
  41     again, with the options given in the "ac_configure_args" subst.
  42
  43     The options to this function are passed when creating the
  44     ConfigEnvironment. These lists, as well as the actual wrapper script
  45     around this function, are meant to be generated by configure.
  46     See build/autoconf/config.status.m4.
  47     '''
  48
  49     if 'CONFIG_FILES' in os.environ:
  50         raise Exception('Using the CONFIG_FILES environment variable is not '
  51             'supported.')
  52     if 'CONFIG_HEADERS' in os.environ:
  53         raise Exception('Using the CONFIG_HEADERS environment variable is not '
  54             'supported.')
  55
  56     if not os.path.isabs(topsrcdir):
  57         raise Exception('topsrcdir must be defined as an absolute directory: '
  58             '%s' % topsrcdir)
  59
  60     parser = OptionParser()
  61     parser.add_option('--recheck', dest='recheck', action='store_true',
  62                       help='update config.status by reconfiguring in the same conditions')
  63     parser.add_option('-v', '--verbose', dest='verbose', action='store_true',
  64                       help='display verbose output')
  65     parser.add_option('-n', dest='not_topobjdir', action='store_true',
  66                       help='do not consider current directory as top object directory')
  67     (options, args) = parser.parse_args()
  68
  69     # Without -n, the current directory is meant to be the top object directory
  70     if not options.not_topobjdir:
  71         topobjdir = os.path.abspath('.')
  72
  73     env = ConfigEnvironment(topsrcdir, topobjdir, defines=defines,
  74             non_global_defines=non_global_defines, substs=substs)
  75
  76     # mozinfo.json only needs written if configure changes and configure always
  77     # passes this environment variable.
  78     if 'WRITE_MOZINFO' in os.environ:
  79         write_mozinfo(os.path.join(topobjdir, 'mozinfo.json'), env, os.environ)
  80
  81     reader = BuildReader(env)
  82     emitter = TreeMetadataEmitter(env)
  83     backend = RecursiveMakeBackend(env)
  84     # This won't actually do anything because of the magic of generators.
  85     definitions = emitter.emit(reader.read_topsrcdir())
  86
  87     if options.recheck:
  88         # Execute configure from the top object directory
  89         os.chdir(topobjdir)
  90         os.execlp('sh', 'sh', '-c', ' '.join([os.path.join(topsrcdir, 'configure'), env.substs['ac_configure_args'], '--no-create', '--no-recursion']))
  91
  92     log_level = logging.DEBUG if options.verbose else logging.INFO
  93     log_manager.add_terminal_logging(level=log_level)
  94     log_manager.enable_unstructured()
  95
  96     print('Reticulating splines...', file=sys.stderr)
  97     summary = backend.consume(definitions)
  98
  99     for line in summary.summaries():
 100         print(line, file=sys.stderr)