3 # Mathieu Courtois - EDF R&D, 2013 - http://www.code-aster.org
6 When a project has a lot of options the 'waf configure' command line can be
7 very long and it becomes a cause of error.
8 This tool provides a convenient way to load a set of configuration parameters
9 from a local file or from a remote url.
11 The configuration parameters are stored in a Python file that is imported as
12 an extra waf tool can be.
15 $ waf configure --use-config-dir=http://www.anywhere.org --use-config=myconf1 ...
17 The file 'myconf1' will be downloaded from 'http://www.anywhere.org'
18 (or 'http://www.anywhere.org/wafcfg').
19 If the files are available locally, it could be:
20 $ waf configure --use-config-dir=/somewhere/myconfigurations --use-config=myconf1 ...
22 The configuration of 'myconf1.py' is automatically loaded by calling
23 its 'configure' function. In this example, it defines environment variables and
27 self.env['CC'] = 'gcc-4.8'
28 self.env.append_value('LIBPATH', [...])
29 self.options.perlbinary = '/usr/local/bin/perl'
30 self.options.pyc = False
32 The corresponding command line should have been:
33 $ CC=gcc-4.8 LIBPATH=... waf configure --nopyc --with-perl-binary=/usr/local/bin/perl
36 This is an extra tool, not bundled with the default waf binary.
37 To add the use_config tool to the waf file:
38 $ ./waf-light --tools=use_config
40 When using this tool, the wscript will look like:
43 opt.load('use_config')
46 conf.load('use_config')
54 from urllib import request
56 from urllib import urlopen
58 urlopen = request.urlopen
61 from waflib import Errors, Context, Logs, Utils, Options, Configure
64 from urllib.parse import urlparse
66 from urlparse import urlparse
71 DEFAULT_DIR = 'wafcfg'
72 # add first the current wafcfg subdirectory
73 sys.path.append(osp.abspath(DEFAULT_DIR))
76 group = self.add_option_group('configure options')
77 group.add_option('--download', dest='download', default=False, action='store_true', help='try to download the tools if missing')
79 group.add_option('--use-config', action='store', default=None,
80 metavar='CFG', dest='use_config',
81 help='force the configuration parameters by importing '
82 'CFG.py. Several modules may be provided (comma '
84 group.add_option('--use-config-dir', action='store', default=DEFAULT_DIR,
85 metavar='CFG_DIR', dest='use_config_dir',
86 help='path or url where to find the configuration file')
88 def download_check(node):
90 Hook to check for the tools which are downloaded. Replace with your function if necessary.
95 def download_tool(tool, force=False, ctx=None):
97 Download a Waf tool from the remote repository defined in :py:const:`waflib.Context.remote_repo`::
99 $ waf configure --download
101 for x in Utils.to_list(Context.remote_repo):
102 for sub in Utils.to_list(Context.remote_locs):
103 url = '/'.join((x, sub, tool + '.py'))
107 if web.getcode() != 200:
109 except AttributeError:
112 # on python3 urlopen throws an exception
113 # python 2.3 does not have getcode and throws an exception to fail
116 tmp = ctx.root.make_node(os.sep.join((Context.waf_dir, 'waflib', 'extras', tool + '.py')))
117 tmp.write(web.read(), 'wb')
118 Logs.warn('Downloaded %s from %s' % (tool, url))
121 module = Context.load_tool(tool)
123 Logs.warn('The tool %s from %s is unusable' % (tool, url))
131 raise Errors.WafError('Could not load the Waf tool')
133 def load_tool(tool, tooldir=None, ctx=None, with_sys_path=True):
135 module = Context.load_tool_default(tool, tooldir, ctx, with_sys_path)
136 except ImportError as e:
137 if Options.options.download:
138 module = download_tool(tool, ctx=ctx)
140 ctx.fatal('Could not load the Waf tool %r or download a suitable replacement from the repository (sys.path %r)\n%s' % (tool, sys.path, e))
142 ctx.fatal('Could not load the Waf tool %r from %r (try the --download option?):\n%s' % (tool, sys.path, e))
145 Context.load_tool_default = Context.load_tool
146 Context.load_tool = load_tool
147 Configure.download_tool = download_tool
151 use_cfg = opts.use_config
154 url = urlparse(opts.use_config_dir)
157 kwargs['download'] = True
158 kwargs['remote_url'] = url.geturl()
159 # search first with the exact url, else try with +'/wafcfg'
160 kwargs['remote_locs'] = ['', DEFAULT_DIR]
161 tooldir = url.geturl() + ' ' + DEFAULT_DIR
162 for cfg in use_cfg.split(','):
163 Logs.pprint('NORMAL', "Searching configuration '%s'..." % cfg)
164 self.load(cfg, tooldir=tooldir, **kwargs)
165 self.start_msg('Checking for configuration')
166 self.end_msg(use_cfg)