Serd subproject with meson
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#!/usr/bin/env python
# encoding: utf-8
# Scott Newton, 2005 (scottn)
# Thomas Nagy, 2006-2018 (ita)
Support for waf command-line options
Provides default and command-line options, as well the command
that reads the ``options`` wscript function.
import os, tempfile, optparse, sys, re
from waflib import Logs, Utils, Context, Errors
options = optparse.Values()
A global dictionary representing user-provided command-line options::
$ waf --foo=bar
commands = []
List of commands to execute extracted from the command-line. This list
is consumed during the execution by :py:func:`waflib.Scripting.run_commands`.
envvars = []
List of environment variable declarations placed after the Waf executable name.
These are detected by searching for "=" in the remaining arguments.
You probably do not want to use this.
lockfile = os.environ.get('WAFLOCK', '.lock-waf_%s_build' % sys.platform)
Name of the lock file that marks a project as configured
class opt_parser(optparse.OptionParser):
Command-line options parser.
def __init__(self, ctx, allow_unknown=False):
optparse.OptionParser.__init__(self, conflict_handler='resolve', add_help_option=False,
version='waf %s (%s)' % (Context.WAFVERSION, Context.WAFREVISION))
self.formatter.width = Logs.get_term_cols()
self.ctx = ctx
self.allow_unknown = allow_unknown
def _process_args(self, largs, rargs, values):
Custom _process_args to allow unknown options according to the allow_unknown status
while rargs:
except (optparse.BadOptionError, optparse.AmbiguousOptionError) as e:
if self.allow_unknown:
def print_usage(self, file=None):
return self.print_help(file)
def get_usage(self):
Builds the message to print on ``waf --help``
:rtype: string
cmds_str = {}
for cls in Context.classes:
if not cls.cmd or cls.cmd == 'options' or cls.cmd.startswith( '_' ):
s = cls.__doc__ or ''
cmds_str[cls.cmd] = s
if Context.g_module:
for (k, v) in Context.g_module.__dict__.items():
if k in ('options', 'init', 'shutdown'):
if type(v) is type(Context.create_context):
if v.__doc__ and not k.startswith('_'):
cmds_str[k] = v.__doc__
just = 0
for k in cmds_str:
just = max(just, len(k))
lst = [' %s: %s' % (k.ljust(just), v) for (k, v) in cmds_str.items()]
ret = '\n'.join(lst)
return '''waf [commands] [options]
Main commands (example: ./waf build -j4)
''' % ret
class OptionsContext(Context.Context):
Collects custom options from wscript files and parses the command line.
Sets the global :py:const:`waflib.Options.commands` and :py:const:`waflib.Options.options` values.
cmd = 'options'
fun = 'options'
def __init__(self, **kw):
super(OptionsContext, self).__init__(**kw)
self.parser = opt_parser(self)
"""Instance of :py:class:`waflib.Options.opt_parser`"""
self.option_groups = {}
jobs =
p = self.add_option
color = os.environ.get('NOCOLOR', '') and 'no' or 'auto'
if os.environ.get('CLICOLOR', '') == '0':
color = 'no'
elif os.environ.get('CLICOLOR_FORCE', '') == '1':
color = 'yes'
p('-c', '--color', dest='colors', default=color, action='store', help='whether to use colors (yes/no/auto) [default: auto]', choices=('yes', 'no', 'auto'))
p('-j', '--jobs', dest='jobs', default=jobs, type='int', help='amount of parallel jobs (%r)' % jobs)
p('-k', '--keep', dest='keep', default=0, action='count', help='continue despite errors (-kk to try harder)')
p('-v', '--verbose', dest='verbose', default=0, action='count', help='verbosity level -v -vv or -vvv [default: 0]')
p('--zones', dest='zones', default='', action='store', help='debugging zones (task_gen, deps, tasks, etc)')
p('--profile', dest='profile', default=0, action='store_true', help=optparse.SUPPRESS_HELP)
p('--pdb', dest='pdb', default=0, action='store_true', help=optparse.SUPPRESS_HELP)
p('-h', '--help', dest='whelp', default=0, action='store_true', help="show this help message and exit")
gr = self.add_option_group('Configuration options')
self.option_groups['configure options'] = gr
gr.add_option('-o', '--out', action='store', default='', help='build dir for the project', dest='out')
gr.add_option('-t', '--top', action='store', default='', help='src dir for the project', dest='top')
gr.add_option('--no-lock-in-run', action='store_true', default='', help=optparse.SUPPRESS_HELP, dest='no_lock_in_run')
gr.add_option('--no-lock-in-out', action='store_true', default='', help=optparse.SUPPRESS_HELP, dest='no_lock_in_out')
gr.add_option('--no-lock-in-top', action='store_true', default='', help=optparse.SUPPRESS_HELP, dest='no_lock_in_top')
default_prefix = getattr(Context.g_module, 'default_prefix', os.environ.get('PREFIX'))
if not default_prefix:
if Utils.unversioned_sys_platform() == 'win32':
d = tempfile.gettempdir()
default_prefix = d[0].upper() + d[1:]
# win32 preserves the case, but gettempdir does not
default_prefix = '/usr/local/'
gr.add_option('--prefix', dest='prefix', default=default_prefix, help='installation prefix [default: %r]' % default_prefix)
gr.add_option('--bindir', dest='bindir', help='bindir')
gr.add_option('--libdir', dest='libdir', help='libdir')
gr = self.add_option_group('Build and installation options')
self.option_groups['build and install options'] = gr
gr.add_option('-p', '--progress', dest='progress_bar', default=0, action='count', help= '-p: progress bar; -pp: ide output')
gr.add_option('--targets', dest='targets', default='', action='store', help='task generators, e.g. "target1,target2"')
gr = self.add_option_group('Step options')
self.option_groups['step options'] = gr
gr.add_option('--files', dest='files', default='', action='store', help='files to process, by regexp, e.g. "*/main.c,*/test/main.o"')
default_destdir = os.environ.get('DESTDIR', '')
gr = self.add_option_group('Installation and uninstallation options')
self.option_groups['install/uninstall options'] = gr
gr.add_option('--destdir', help='installation root [default: %r]' % default_destdir, default=default_destdir, dest='destdir')
gr.add_option('-f', '--force', dest='force', default=False, action='store_true', help='force file installation')
gr.add_option('--distcheck-args', metavar='ARGS', help='arguments to pass to distcheck', default=None, action='store')
def jobs(self):
Finds the optimal amount of cpu cores to use for parallel jobs.
At runtime the options can be obtained from :py:const:`waflib.Options.options` ::
from waflib.Options import options
njobs =
:return: the amount of cpu cores
:rtype: int
count = int(os.environ.get('JOBS', 0))
if count < 1:
if 'NUMBER_OF_PROCESSORS' in os.environ:
# on Windows, use the NUMBER_OF_PROCESSORS environment variable
count = int(os.environ.get('NUMBER_OF_PROCESSORS', 1))
# on everything else, first try the POSIX sysconf values
if hasattr(os, 'sysconf_names'):
if 'SC_NPROCESSORS_ONLN' in os.sysconf_names:
count = int(os.sysconf('SC_NPROCESSORS_ONLN'))
elif 'SC_NPROCESSORS_CONF' in os.sysconf_names:
count = int(os.sysconf('SC_NPROCESSORS_CONF'))
if not count and not in ('nt', 'java'):
tmp = self.cmd_and_log(['sysctl', '-n', 'hw.ncpu'], quiet=0)
except Errors.WafError:
if re.match('^[0-9]+$', tmp):
count = int(tmp)
if count < 1:
count = 1
elif count > 1024:
count = 1024
return count
def add_option(self, *k, **kw):
Wraps ``optparse.add_option``::
def options(ctx):
ctx.add_option('-u', '--use', dest='use', default=False,
action='store_true', help='a boolean option')
:rtype: optparse option object
return self.parser.add_option(*k, **kw)
def add_option_group(self, *k, **kw):
Wraps ``optparse.add_option_group``::
def options(ctx):
gr = ctx.add_option_group('some options')
gr.add_option('-u', '--use', dest='use', default=False, action='store_true')
:rtype: optparse option group object
gr = self.option_groups[k[0]]
except KeyError:
gr = self.parser.add_option_group(*k, **kw)
self.option_groups[k[0]] = gr
return gr
def get_option_group(self, opt_str):
Wraps ``optparse.get_option_group``::
def options(ctx):
gr = ctx.get_option_group('configure options')
gr.add_option('-o', '--out', action='store', default='',
help='build dir for the project', dest='out')
:rtype: optparse option group object
return self.option_groups[opt_str]
except KeyError:
for group in self.parser.option_groups:
if group.title == opt_str:
return group
return None
def sanitize_path(self, path, cwd=None):
if not cwd:
cwd = Context.launch_dir
p = os.path.expanduser(path)
p = os.path.join(cwd, p)
p = os.path.normpath(p)
p = os.path.abspath(p)
return p
def parse_cmd_args(self, _args=None, cwd=None, allow_unknown=False):
Just parse the arguments
self.parser.allow_unknown = allow_unknown
(options, leftover_args) = self.parser.parse_args(args=_args)
envvars = []
commands = []
for arg in leftover_args:
if '=' in arg:
elif arg != 'options':
for name in 'top out destdir prefix bindir libdir'.split():
# those paths are usually expanded from Context.launch_dir
if getattr(options, name, None):
path = self.sanitize_path(getattr(options, name), cwd)
setattr(options, name, path)
return options, commands, envvars
def init_module_vars(self, arg_options, arg_commands, arg_envvars):
del commands[:]
del envvars[:]
for var in envvars:
(name, value) = var.split('=', 1)
os.environ[name.strip()] = value
def init_logs(self, options, commands, envvars):
Logs.verbose = options.verbose
if options.verbose >= 1:
colors = {'yes' : 2, 'auto' : 1, 'no' : 0}[options.colors]
if options.zones:
Logs.zones = options.zones.split(',')
if not Logs.verbose:
Logs.verbose = 1
elif Logs.verbose > 0:
Logs.zones = ['runner']
if Logs.verbose > 2:
Logs.zones = ['*']
def parse_args(self, _args=None):
Parses arguments from a list which is not necessarily the command-line.
Initializes the module variables options, commands and envvars
If help is requested, prints it and exit the application
:param _args: arguments
:type _args: list of strings
options, commands, envvars = self.parse_cmd_args()
self.init_logs(options, commands, envvars)
self.init_module_vars(options, commands, envvars)
def execute(self):
See :py:func:`waflib.Context.Context.execute`
super(OptionsContext, self).execute()