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#!/usr/bin/env python

import string, Logs, Utils, Options, sys, Build, os, intltool, optparse, textwrap
from samba_utils import EXPAND_VARIABLES, os_path_relpath

class SambaIndentedHelpFormatter (optparse.IndentedHelpFormatter):
    """Format help with indented section bodies.
    """

    def __init__(self,
                 indent_increment=2,
                 max_help_position=12,
                 width=None,
                 short_first=1):
        optparse.IndentedHelpFormatter.__init__(
            self, indent_increment, max_help_position, width, short_first)

    def format_option(self, option):
        # The help for each option consists of two parts:
        #   * the opt strings and metavars
        #     eg. ("-x", or "-fFILENAME, --file=FILENAME")
        #   * the user-supplied help string
        #     eg. ("turn on expert mode", "read data from FILENAME")
        #
        # If possible, we write both of these on the same line:
        #   -x      turn on expert mode
        #
        # But if the opt string list is too long, we put the help
        # string on a second line, indented to the same column it would
        # start in if it fit on the first line.
        #   -fFILENAME, --file=FILENAME
        #           read data from FILENAME
        result = []
        opts = self.option_strings[option]
        opt_width = self.help_position - self.current_indent - 2
        if len(opts) > opt_width:
            opts = "%*s%s\n" % (self.current_indent, "", opts)
            indent_first = self.help_position
        else:                       # start help on same line as opts
            opts = "%*s%-*s  " % (self.current_indent, "", opt_width, opts)
            indent_first = 0
        result.append(opts)
        if option.help:
            help_text = self.expand_default(option)
            if string.find(help_text, '\n') == -1:
                help_lines = textwrap.wrap(help_text, self.help_width)
            else:
                help_lines = help_text.splitlines()
            result.append("%*s%s\n" % (indent_first, "", help_lines[0]))
            result.extend(["%*s%s\n" % (self.help_position, "", line)
                           for line in help_lines[1:]])
        elif opts[-1] != "\n":
            result.append("\n")
        return "".join(result)


# list of directory options to offer in configure
#
# 'STD-PATH'  - the default path without --enable-fhs
# 'FHS-PATH'  - the default path with --enable-fhs
#
# 'OPTION'    - the configure option to overwrite the default (optional)
# 'HELPTEXT'  - the help text of the configure option (optional)
#
# 'OVERWRITE' - The option referrs to itself and was already from
#               the basic GNU options from the gnu_dirs tool.
#               We may overwrite the related path. (Default: False)
#
# 'DELAY'     - The option referrs to other options in the dynconfig list.
#               We delay the intialization into a later stage. This
#               makes sure the recursion works. (Default: False)
#
dynconfig = {
    'BINDIR' : {
         'STD-PATH':  '${BINDIR}',
         'FHS-PATH':  '${BINDIR}',
         'OVERWRITE': True,
    },
    'SBINDIR' : {
         'STD-PATH':  '${SBINDIR}',
         'FHS-PATH':  '${SBINDIR}',
         'OVERWRITE': True,
    },
    'LIBDIR' : {
         'STD-PATH':  '${LIBDIR}',
         'FHS-PATH':  '${LIBDIR}',
         'OVERWRITE': True,
    },
    'LIBEXECDIR' : {
         'STD-PATH':  '${LIBEXECDIR}',
         'FHS-PATH':  '${LIBEXECDIR}',
         'OVERWRITE': True,
    },
    'DATADIR' : {
         'STD-PATH':  '${DATADIR}',
         'FHS-PATH':  '${DATADIR}',
         'OVERWRITE': True,
    },
    'LOCALEDIR' : {
         'STD-PATH':  '${LOCALEDIR}',
         'FHS-PATH':  '${LOCALEDIR}',
         'OVERWRITE': True,
    },
    'PYTHONDIR' : {
         'STD-PATH':  '${PYTHONDIR}',
         'FHS-PATH':  '${PYTHONDIR}',
         'OVERWRITE': True,
    },
    'PYTHONARCHDIR' : {
         'STD-PATH':  '${PYTHONARCHDIR}',
         'FHS-PATH':  '${PYTHONARCHDIR}',
         'OVERWRITE': True,
    },
    'INCLUDEDIR' : {
         'STD-PATH':  '${INCLUDEDIR}',
         'FHS-PATH':  '${INCLUDEDIR}/samba-4.0',
         'OVERWRITE': True,
    },
    'SCRIPTSBINDIR' : {
         'STD-PATH':  '${SBINDIR}',
         'FHS-PATH':  '${SBINDIR}',
    },
    'SETUPDIR' : {
         'STD-PATH':  '${DATADIR}/setup',
         'FHS-PATH':  '${DATADIR}/samba/setup',
    },
    'PKGCONFIGDIR' : {
         'STD-PATH':  '${LIBDIR}/pkgconfig',
         'FHS-PATH':  '${LIBDIR}/pkgconfig',
    },
    'SWATDIR' : {
         'STD-PATH':  '${DATADIR}/swat',
         'FHS-PATH':  '${DATADIR}/samba/swat',
    },
    'CODEPAGEDIR' : {
         'STD-PATH':  '${DATADIR}/codepages',
         'FHS-PATH':  '${DATADIR}/samba/codepages',
    },
    'PRIVATELIBDIR' : {
         'STD-PATH':  '${LIBDIR}/private',
         'FHS-PATH':  '${LIBDIR}/samba',
         'OPTION':    '--with-privatelibdir',
         'HELPTEXT':  'Which directory to use for private Samba libraries',
         'OVERWRITE': True,
    },
    'MODULESDIR' : {
         'STD-PATH':  '${LIBDIR}',
         'FHS-PATH':  '${LIBDIR}/samba',
         'OPTION':    '--with-modulesdir',
         'HELPTEXT':  'Which directory to use for Samba modules',
         'OVERWRITE': True,
    },
    'PAMMODULESDIR' : {
         'STD-PATH':  '${LIBDIR}/security',
         'FHS-PATH':  '${LIBDIR}/security',
         'OPTION':    '--with-pammodulesdir',
         'HELPTEXT':  'Which directory to use for PAM modules',
    },
    'CONFIGDIR' : {
         'STD-PATH':  '${SYSCONFDIR}',
         'FHS-PATH':  '${SYSCONFDIR}/samba',
         'OPTION':    '--with-configdir',
         'HELPTEXT':  'Where to put configuration files',
    },
    'PRIVATE_DIR' : {
         'STD-PATH':  '${PREFIX}/private',
         'FHS-PATH':  '${LOCALSTATEDIR}/lib/samba/private',
         'OPTION':    '--with-privatedir',
         'HELPTEXT':  'Where to put sam.ldb and other private files',
    },
    'LOCKDIR' : {
         'STD-PATH':  '${LOCALSTATEDIR}/lock',
         'FHS-PATH':  '${LOCALSTATEDIR}/lock/samba',
         'OPTION':    '--with-lockdir',
         'HELPTEXT':  'Where to put short term disposable state files',
    },
    'PIDDIR' : {
         'STD-PATH':  '${LOCALSTATEDIR}/run',
         'FHS-PATH':  '${LOCALSTATEDIR}/run/samba',
         'OPTION':    '--with-piddir',
         'HELPTEXT':  'Where to put pid files',
    },
    'STATEDIR' : {
         'STD-PATH':  '${LOCALSTATEDIR}/locks',
         'FHS-PATH':  '${LOCALSTATEDIR}/lib/samba',
         'OPTION':    '--with-statedir',
         'HELPTEXT':  'Where to put persistent state files',
    },
    'CACHEDIR' : {
         'STD-PATH':  '${LOCALSTATEDIR}/cache',
         'FHS-PATH':  '${LOCALSTATEDIR}/cache/samba',
         'OPTION':    '--with-cachedir',
         'HELPTEXT':  'Where to put temporary cache files',
    },
    'LOGFILEBASE' : {
         'STD-PATH':  '${LOCALSTATEDIR}',
         'FHS-PATH':  '${LOCALSTATEDIR}/log/samba',
         'OPTION':    '--with-logfilebase',
         'HELPTEXT':  'Where to put log files',
    },
    'SOCKET_DIR' : {
         'STD-PATH':  '${LOCALSTATEDIR}/run',
         'FHS-PATH':  '${LOCALSTATEDIR}/run/samba',
         'OPTION':    '--with-sockets-dir',
         'HELPTEXT':  'socket directory',
    },
    'PRIVILEGED_SOCKET_DIR' : {
         'STD-PATH':  '${LOCALSTATEDIR}/lib',
         'FHS-PATH':  '${LOCALSTATEDIR}/lib/samba',
         'OPTION':    '--with-privileged-socket-dir',
         'HELPTEXT':  'privileged socket directory',
    },
    'WINBINDD_SOCKET_DIR' : {
         'STD-PATH':  '${SOCKET_DIR}/winbindd',
         'FHS-PATH':  '${SOCKET_DIR}/winbindd',
         'DELAY':     True,
    },
    'WINBINDD_PRIVILEGED_SOCKET_DIR' : {
         'STD-PATH':  '${PRIVILEGED_SOCKET_DIR}/winbindd_privileged',
         'FHS-PATH':  '${PRIVILEGED_SOCKET_DIR}/winbindd_privileged',
         'DELAY':     True,
    },
    'NMBDSOCKETDIR' : {
         'STD-PATH':  '${SOCKET_DIR}/nmbd',
         'FHS-PATH':  '${SOCKET_DIR}/nmbd',
         'DELAY':     True,
    },
    'NTP_SIGND_SOCKET_DIR' : {
         'STD-PATH':  '${SOCKET_DIR}/ntp_signd',
         'FHS-PATH':  '${SOCKET_DIR}/ntp_signd',
         'DELAY':     True,
    },
    'NCALRPCDIR' : {
         'STD-PATH':  '${SOCKET_DIR}/ncalrpc',
         'FHS-PATH':  '${SOCKET_DIR}/ncalrpc',
         'DELAY':     True,
    },
    'CONFIGFILE' : {
         'STD-PATH':  '${CONFIGDIR}/smb.conf',
         'FHS-PATH':  '${CONFIGDIR}/smb.conf',
         'DELAY':     True,
    },
    'LMHOSTSFILE' : {
         'STD-PATH':  '${CONFIGDIR}/lmhosts',
         'FHS-PATH':  '${CONFIGDIR}/lmhosts',
         'DELAY':     True,
    },
    'SMB_PASSWD_FILE' : {
         'STD-PATH':  '${PRIVATE_DIR}/smbpasswd',
         'FHS-PATH':  '${PRIVATE_DIR}/smbpasswd',
         'DELAY':     True,
    },
}

def set_options(opt):
    opt.parser.formatter = SambaIndentedHelpFormatter()
    opt.parser.formatter.width=Utils.get_term_cols()

    for k in ('--with-privatelibdir', '--with-modulesdir'):
        option = opt.parser.get_option(k)
        if option:
            opt.parser.remove_option(k)
    del opt.parser.defaults['PRIVATELIBDIR']
    del opt.parser.defaults['MODULESDIR']

    # get all the basic GNU options from the gnu_dirs tool

    opt_group=opt.add_option_group('Samba-specific directory layout','')

    fhs_help  = "Use FHS-compliant paths (default no)\n"
    fhs_help += "You should consider using this together with:\n"
    fhs_help += "--prefix=/usr --sysconfdir=/etc --locatestatedir=/var"
    opt_group.add_option('--enable-fhs', help=fhs_help,
                   action="store_true", dest='ENABLE_FHS', default=False)

    for varname in dynconfig.keys():
        if 'OPTION' not in dynconfig[varname]:
            continue
        opt = dynconfig[varname]['OPTION']
        if 'HELPTEXT' in dynconfig[varname]:
            txt = dynconfig[varname]['HELPTEXT']
        else:
            txt = "dynconfig path %s" % (varname)
        def_std = dynconfig[varname]['STD-PATH']
        def_fhs = dynconfig[varname]['FHS-PATH']

        help = "%s\n[STD-Default: %s]\n[FHS-Default: %s]" % (txt, def_std, def_fhs)
        opt_group.add_option(opt, help=help, dest=varname, action="store")

def configure(conf):
    # get all the basic GNU options from the gnu_dirs tool

    if Options.options.ENABLE_FHS:
        flavor = 'FHS-PATH'
    else:
        flavor = 'STD-PATH'
        if conf.env.PREFIX == '/usr' or conf.env.PREFIX == '/usr/local':
           Logs.error("Don't install directly under /usr or /usr/local without using the FHS option (--enable-fhs)")
           raise Utils.WafError("ERROR: invalid --prefix=%s value" % (conf.env.PREFIX))

    explicit_set ={}

    dyn_vars = {}
    for varname in dynconfig.keys():
        dyn_vars[varname] = dynconfig[varname][flavor]
        if 'OVERWRITE' in dynconfig[varname] and dynconfig[varname]['OVERWRITE']:
            # we may overwrite this option
            continue
        conf.ASSERT(varname not in conf.env, "Variable %s already defined" % varname)

    # the explicit block
    for varname in dynconfig.keys():
        if 'OPTION' not in dynconfig[varname]:
            continue
        value = getattr(Options.options, varname, None)
        if value is None:
           continue
        conf.ASSERT(value != '', "Empty dynconfig value for %s" % varname)
        conf.env[varname] = value
        # mark it as explicit from the command line
        explicit_set[varname] = value

    # defaults stage 1 after the explicit block
    for varname in dynconfig.keys():
        if 'DELAY' in dynconfig[varname] and dynconfig[varname]['DELAY']:
            # this option referrs to other options,
            # so it needs to wait for stage 2.
            continue
        value = EXPAND_VARIABLES(conf, dyn_vars[varname])
        conf.ASSERT(value != '', "Empty dynconfig value for %s" % varname)
        if varname not in explicit_set:
            # only overwrite if not specified explicitly on the command line
            conf.env[varname] = value

    # defaults stage 2 after the explicit block
    for varname in dynconfig.keys():
        if 'DELAY' not in dynconfig[varname] or not dynconfig[varname]['DELAY']:
            # this option was already handled in stage 1.
            continue
        value = EXPAND_VARIABLES(conf, dyn_vars[varname])
        conf.ASSERT(value != '', "Empty dynconfig value for %s" % varname)
        if varname not in explicit_set:
            # only overwrite if not specified explicitly on the command line
            conf.env[varname] = value

    # display the expanded pathes for the user
    for varname in dynconfig.keys():
        value = conf.env[varname]
        conf.start_msg("Dynconfig[%s]: " % (varname))
        conf.end_msg("'%s'" % (value), 'GREEN')

def dynconfig_cflags(bld, list=None):
    '''work out the extra CFLAGS for dynconfig.c'''
    cflags = []
    # override some paths when running from the build directory
    override = { 'MODULESDIR'    : 'bin/modules',
                 'PYTHONDIR'     : 'bin/python',
                 'PYTHONARCHDIR' : 'bin/python',
                 'BINDIR'        : 'bin',
                 'SBINDIR'       : 'bin',
                 'CODEPAGEDIR'   : os.path.join(bld.env.srcdir, 'codepages'),
                 'SCRIPTSBINDIR' : os.path.join(bld.env.srcdir, 'source4/scripting/bin'),
                 'SETUPDIR'      : os.path.join(bld.env.srcdir, 'source4/setup') }
    for varname in dynconfig.keys():
        if list and not varname in list:
            continue
        value = bld.env[varname]
        if not Options.is_install:
            if varname in override:
                value = os.path.join(os.getcwd(), override[varname])
        cflags.append('-D%s="%s"' % (varname, value))
    return cflags
Build.BuildContext.dynconfig_cflags = dynconfig_cflags

def build(bld):
    cflags = bld.dynconfig_cflags()
    version_header = 'version.h'
    bld.SAMBA_SUBSYSTEM('DYNCONFIG',
                        'dynconfig.c',
                        deps='replace talloc',
                        public_headers=os_path_relpath(os.path.join(Options.launch_dir, version_header), bld.curdir),
                        header_path='samba',
                        cflags=cflags)

    # install some extra empty directories
    bld.INSTALL_DIRS("", "${CONFIGDIR} ${PRIVATE_DIR} ${LOGFILEBASE}");
    bld.INSTALL_DIRS("", "${PRIVATE_DIR} ${PRIVILEGED_SOCKET_DIR}")
    bld.INSTALL_DIRS("", "${STATEDIR} ${CACHEDIR}");

    # these might be on non persistent storage
    bld.INSTALL_DIRS("", "${LOCKDIR} ${PIDDIR} ${SOCKET_DIR}")

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