1#!/usr/bin/env python
2
3import os, string
4from samba_utils import MODE_755
5from waflib import Logs, Errors
6
7# This function checks if a perl module is installed on the system.
8def check_system_perl_module(conf, module, version=None):
9    module_check = module
10
11    # Create module string with version
12    if version:
13        module_check = module + ' ' + str(version)
14
15    # Check for system perl module
16    if conf.check_perl_module(module_check) is None:
17        return False
18
19    return True
20
21def options(opt):
22    return
23
24def configure(conf):
25    # Check if perl(Parse::Yapp::Driver) is available.
26    if not check_system_perl_module(conf,
27                                    "Parse::Yapp::Driver",
28                                    1.05):
29        raise Errors.WafError('perl module "Parse::Yapp::Driver" not found')
30
31    # yapp is used for building the parser
32    if not conf.find_program('yapp', var='YAPP'):
33        raise Errors.WafError('yapp not found')
34
35def build(bld):
36
37    # we want to prefer the git version of the parsers if we can.
38    # Only if the source has changed do we want to re-run yapp
39    # But we force the developer to use the pidl standalone build
40    # to regenerate the files.
41    # TODO: only warn in developer mode and if 'git diff HEAD'
42    #       shows a difference
43    warn_about_grammar_changes = ('PIDL_BUILD_WARNINGS' in bld.env and (
44        bld.IS_NEWER('idl.yp', 'lib/Parse/Pidl/IDL.pm') or
45        bld.IS_NEWER('expr.yp', 'lib/Parse/Pidl/Expr.pm')))
46
47    if warn_about_grammar_changes:
48        Logs.warn('''
49Pidl grammar files have changed. Please use the pidl standalone build
50to regenerate them with yapp.
51
52$ cd ../pidl
53$ perl Makefile.PL
54$ make lib/Parse/Pidl/IDL.pm lib/Parse/Pidl/Expr.pm
55$ git add lib/Parse/Pidl/IDL.pm lib/Parse/Pidl/Expr.pm
56$ git commit
57$ cd -
58
59If your 100% sure you haven't changed idl.yp and expr.yp
60try this to avoid this message:
61
62$ touch ../pidl/lib/Parse/Pidl/IDL.pm ../pidl/lib/Parse/Pidl/Expr.pm
63''')
64
65