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#!/usr/bin/env python

import os, sys, Logs
from samba_utils import MODE_755

def set_options(opt):
    opt.tool_options('perl')

def configure(conf):
    conf.check_tool('perl')
    # we need a recent version of MakeMaker to get the right man page names
    if conf.CHECK_PERL_MANPAGE():
        conf.env.PERLMAN1EXT = conf.CHECK_PERL_MANPAGE(section='1')
        conf.env.PERLMAN3EXT = conf.CHECK_PERL_MANPAGE(section='3')
        conf.DEFINE('HAVE_PERL_MAKEMAKER', 1)

    # yapp is used for building the parser
    conf.find_program('yapp', var='YAPP')
    conf.find_program('pod2man', var='POD2MAN')

def build(bld):
    bld.INSTALL_FILES('${BINDIR}', 'pidl', chmod=MODE_755)

    bld.RECURSE('lib')

    if not bld.CONFIG_SET('HAVE_PERL_MAKEMAKER'):
        return

    pidl_src = ['pidl']
    pidl_src.extend(bld.path.ant_glob('lib/**/*.pm').split())

    pidl_manpages = {
        'pidl': 'man1/pidl.${PERLMAN1EXT}',
        'lib/Parse/Pidl/NDR.pm': 'man3/Parse::Pidl::NDR.${PERLMAN3EXT}',
        'lib/Parse/Pidl/Wireshark/Conformance.pm': 'man3/Parse::Pidl::Wireshark::Conformance.${PERLMAN3EXT}',
        'lib/Parse/Pidl/Dump.pm': 'man3/Parse::Pidl::Dump.${PERLMAN3EXT}',
        'lib/Parse/Pidl/Util.pm': 'man3/Parse::Pidl::Util.${PERLMAN3EXT}',
        'lib/Parse/Pidl/Wireshark/NDR.pm': 'man3/Parse::Pidl::Wireshark::NDR.${PERLMAN3EXT}'
    }

    for k, v in pidl_manpages.iteritems():
        pidl_manpages[k] = bld.EXPAND_VARIABLES(v)

    # use perl to build the manpages
    bld.env.pidl_srcdir = os.path.join(bld.srcnode.abspath(), 'pidl')

    blib_bld = os.path.join(bld.srcnode.abspath(bld.env), 'pidl/blib')

    bld.SET_BUILD_GROUP('final')
    if 'POD2MAN' in bld.env and bld.env['POD2MAN'] != '':
        for src, manpage in pidl_manpages.iteritems():
            bld(rule='${PERL} ${POD2MAN} -c "Samba Documentation" ${SRC} ${TGT}',
                shell=True,
                source=src,
                install_path=os.path.dirname(bld.EXPAND_VARIABLES('${MANDIR}/'+manpage)),
                target=os.path.basename(manpage))

    # we want to prefer the git version of the parsers if we can.
    # Only if the source has changed do we want to re-run yapp
    # But we force the developer to use the pidl standalone build
    # to regenerate the files.
    need_yapp_build = ('YAPP' in bld.env and (
        bld.IS_NEWER('idl.yp', 'lib/Parse/Pidl/IDL.pm') or
        bld.IS_NEWER('expr.yp', 'lib/Parse/Pidl/Expr.pm')))

    if need_yapp_build:
        Logs.warn('''
Pidl grammar files have changed. Please use the pidl standalone build
to regenerate them with yapp.

$ cd ../pidl
$ perl Makefile.PL
$ make lib/Parse/Pidl/IDL.pm lib/Parse/Pidl/Expr.pm
$ git add lib/Parse/Pidl/IDL.pm lib/Parse/Pidl/Expr.pm
$ git commit
$ cd -

If your 100% sure you haven't changed idl.yp and expr.yp
try this to avoid this message:

$ touch ../pidl/lib/Parse/Pidl/IDL.pm ../pidl/lib/Parse/Pidl/Expr.pm
''')