#!/usr/bin/env python

import os

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')


def build(bld):
    bld.INSTALL_FILES('${BINDIR}', 'pidl', chmod=0755)

    bld.BUILD_SUBDIR('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 = '''blib/man1/pidl.${PERLMAN1EXT} blib/man3/Parse::Pidl::NDR.${PERLMAN3EXT}
                       blib/man3/Parse::Pidl::Wireshark::Conformance.${PERLMAN3EXT}
                       blib/man3/Parse::Pidl::Dump.${PERLMAN3EXT}
                       blib/man3/Parse::Pidl::Util.${PERLMAN3EXT}
                       blib/man3/Parse::Pidl::Wireshark::NDR.${PERLMAN3EXT}'''.split()

    pidl_manpages = bld.EXPAND_VARIABLES(pidl_manpages)

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

    # we want to prefer the git version if we can. Only if the
    # source has changed do we want to re-run yapp
    if ('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'))):
        pidl_src.extend(['idl.yp', 'expr.yp'])

    bld.SAMBA_GENERATOR('pidl_manpages',
                        source=pidl_src,
                        target=pidl_manpages,
                        rule='cd ${pidl_srcdir} && ${PERL} Makefile.PL && make && rm -f Makefile Makefile.old')

    for m in pidl_manpages:
        dname=os.path.dirname(m)[5:]
        bld.INSTALL_FILES('${MANDIR}/'+dname, m, flat=True)