#!/usr/bin/env python
# encoding: utf-8
# Thomas Nagy, 2005-2018 (ita)
"""
Configuration system
A :py:class:`waflib.Configure.ConfigurationContext` instance is created when ``waf configure`` is called, it is used to:
* create data dictionaries (ConfigSet instances)
* store the list of modules to import
* hold configuration routines such as ``find_program``, etc
"""
import os, re, shlex, shutil, sys, time, traceback
from waflib import ConfigSet, Utils, Options, Logs, Context, Build, Errors
WAF_CONFIG_LOG = 'config.log'
"""Name of the configuration log file"""
autoconfig = False
"""Execute the configuration automatically"""
conf_template = '''# project %(app)s configured on %(now)s by
# waf %(wafver)s (abi %(abi)s, python %(pyver)x on %(systype)s)
# using %(args)s
#'''
[docs]class ConfigurationContext(Context.Context):
'''configures the project'''
cmd = 'configure'
error_handlers = []
"""
Additional functions to handle configuration errors
"""
def __init__(self, **kw):
super(ConfigurationContext, self).__init__(**kw)
self.environ = dict(os.environ)
self.all_envs = {}
self.top_dir = None
self.out_dir = None
self.tools = [] # tools loaded in the configuration, and that will be loaded when building
self.hash = 0
self.files = []
self.tool_cache = []
self.setenv('')
[docs] def setenv(self, name, env=None):
"""
Set a new config set for conf.env. If a config set of that name already exists,
recall it without modification.
The name is the filename prefix to save to ``c4che/NAME_cache.py``, and it
is also used as *variants* by the build commands.
Though related to variants, whatever kind of data may be stored in the config set::
def configure(cfg):
cfg.env.ONE = 1
cfg.setenv('foo')
cfg.env.ONE = 2
def build(bld):
2 == bld.env_of_name('foo').ONE
:param name: name of the configuration set
:type name: string
:param env: ConfigSet to copy, or an empty ConfigSet is created
:type env: :py:class:`waflib.ConfigSet.ConfigSet`
"""
if name not in self.all_envs or env:
if not env:
env = ConfigSet.ConfigSet()
self.prepare_env(env)
else:
env = env.derive()
self.all_envs[name] = env
self.variant = name
[docs] def get_env(self):
"""Getter for the env property"""
return self.all_envs[self.variant]
[docs] def set_env(self, val):
"""Setter for the env property"""
self.all_envs[self.variant] = val
env = property(get_env, set_env)
[docs] def init_dirs(self):
"""
Initialize the project directory and the build directory
"""
top = self.top_dir
if not top:
top = Options.options.top
if not top:
top = getattr(Context.g_module, Context.TOP, None)
if not top:
top = self.path.abspath()
top = os.path.abspath(top)
self.srcnode = (os.path.isabs(top) and self.root or self.path).find_dir(top)
assert(self.srcnode)
out = self.out_dir
if not out:
out = Options.options.out
if not out:
out = getattr(Context.g_module, Context.OUT, None)
if not out:
out = Options.lockfile.replace('.lock-waf_%s_' % sys.platform, '').replace('.lock-waf', '')
# someone can be messing with symlinks
out = os.path.realpath(out)
self.bldnode = (os.path.isabs(out) and self.root or self.path).make_node(out)
self.bldnode.mkdir()
if not os.path.isdir(self.bldnode.abspath()):
self.fatal('Could not create the build directory %s' % self.bldnode.abspath())
[docs] def execute(self):
"""
See :py:func:`waflib.Context.Context.execute`
"""
self.init_dirs()
self.cachedir = self.bldnode.make_node(Build.CACHE_DIR)
self.cachedir.mkdir()
path = os.path.join(self.bldnode.abspath(), WAF_CONFIG_LOG)
self.logger = Logs.make_logger(path, 'cfg')
app = getattr(Context.g_module, 'APPNAME', '')
if app:
ver = getattr(Context.g_module, 'VERSION', '')
if ver:
app = "%s (%s)" % (app, ver)
params = {'now': time.ctime(), 'pyver': sys.hexversion, 'systype': sys.platform, 'args': " ".join(sys.argv), 'wafver': Context.WAFVERSION, 'abi': Context.ABI, 'app': app}
self.to_log(conf_template % params)
self.msg('Setting top to', self.srcnode.abspath())
self.msg('Setting out to', self.bldnode.abspath())
if id(self.srcnode) == id(self.bldnode):
Logs.warn('Setting top == out')
elif id(self.path) != id(self.srcnode):
if self.srcnode.is_child_of(self.path):
Logs.warn('Are you certain that you do not want to set top="." ?')
super(ConfigurationContext, self).execute()
self.store()
Context.top_dir = self.srcnode.abspath()
Context.out_dir = self.bldnode.abspath()
# this will write a configure lock so that subsequent builds will
# consider the current path as the root directory (see prepare_impl).
# to remove: use 'waf distclean'
env = ConfigSet.ConfigSet()
env.argv = sys.argv
env.options = Options.options.__dict__
env.config_cmd = self.cmd
env.run_dir = Context.run_dir
env.top_dir = Context.top_dir
env.out_dir = Context.out_dir
# conf.hash & conf.files hold wscript files paths and hash
# (used only by Configure.autoconfig)
env.hash = self.hash
env.files = self.files
env.environ = dict(self.environ)
env.launch_dir = Context.launch_dir
if not (self.env.NO_LOCK_IN_RUN or env.environ.get('NO_LOCK_IN_RUN') or getattr(Options.options, 'no_lock_in_run')):
env.store(os.path.join(Context.run_dir, Options.lockfile))
if not (self.env.NO_LOCK_IN_TOP or env.environ.get('NO_LOCK_IN_TOP') or getattr(Options.options, 'no_lock_in_top')):
env.store(os.path.join(Context.top_dir, Options.lockfile))
if not (self.env.NO_LOCK_IN_OUT or env.environ.get('NO_LOCK_IN_OUT') or getattr(Options.options, 'no_lock_in_out')):
env.store(os.path.join(Context.out_dir, Options.lockfile))
[docs] def prepare_env(self, env):
"""
Insert *PREFIX*, *BINDIR* and *LIBDIR* values into ``env``
:type env: :py:class:`waflib.ConfigSet.ConfigSet`
:param env: a ConfigSet, usually ``conf.env``
"""
if not env.PREFIX:
if Options.options.prefix or Utils.is_win32:
env.PREFIX = Options.options.prefix
else:
env.PREFIX = '/'
if not env.BINDIR:
if Options.options.bindir:
env.BINDIR = Options.options.bindir
else:
env.BINDIR = Utils.subst_vars('${PREFIX}/bin', env)
if not env.LIBDIR:
if Options.options.libdir:
env.LIBDIR = Options.options.libdir
else:
env.LIBDIR = Utils.subst_vars('${PREFIX}/lib%s' % Utils.lib64(), env)
[docs] def store(self):
"""Save the config results into the cache file"""
n = self.cachedir.make_node('build.config.py')
n.write('version = 0x%x\ntools = %r\n' % (Context.HEXVERSION, self.tools))
if not self.all_envs:
self.fatal('nothing to store in the configuration context!')
for key in self.all_envs:
tmpenv = self.all_envs[key]
tmpenv.store(os.path.join(self.cachedir.abspath(), key + Build.CACHE_SUFFIX))
[docs] def load(self, tool_list, tooldir=None, funs=None, with_sys_path=True, cache=False):
"""
Load Waf tools, which will be imported whenever a build is started.
:param tool_list: waf tools to import
:type tool_list: list of string
:param tooldir: paths for the imports
:type tooldir: list of string
:param funs: functions to execute from the waf tools
:type funs: list of string
:param cache: whether to prevent the tool from running twice
:type cache: bool
"""
tools = Utils.to_list(tool_list)
if tooldir:
tooldir = Utils.to_list(tooldir)
for tool in tools:
# avoid loading the same tool more than once with the same functions
# used by composite projects
if cache:
mag = (tool, id(self.env), tooldir, funs)
if mag in self.tool_cache:
self.to_log('(tool %s is already loaded, skipping)' % tool)
continue
self.tool_cache.append(mag)
module = None
try:
module = Context.load_tool(tool, tooldir, ctx=self, with_sys_path=with_sys_path)
except ImportError as e:
self.fatal('Could not load the Waf tool %r from %r\n%s' % (tool, getattr(e, 'waf_sys_path', sys.path), e))
except Exception as e:
self.to_log('imp %r (%r & %r)' % (tool, tooldir, funs))
self.to_log(traceback.format_exc())
raise
if funs is not None:
self.eval_rules(funs)
else:
func = getattr(module, 'configure', None)
if func:
if type(func) is type(Utils.readf):
func(self)
else:
self.eval_rules(func)
self.tools.append({'tool':tool, 'tooldir':tooldir, 'funs':funs})
[docs] def post_recurse(self, node):
"""
Records the path and a hash of the scripts visited, see :py:meth:`waflib.Context.Context.post_recurse`
:param node: script
:type node: :py:class:`waflib.Node.Node`
"""
super(ConfigurationContext, self).post_recurse(node)
self.hash = Utils.h_list((self.hash, node.read('rb')))
self.files.append(node.abspath())
[docs] def eval_rules(self, rules):
"""
Execute configuration tests provided as list of functions to run
:param rules: list of configuration method names
:type rules: list of string
"""
self.rules = Utils.to_list(rules)
for x in self.rules:
f = getattr(self, x)
if not f:
self.fatal('No such configuration function %r' % x)
f()
def conf(f):
"""
Decorator: attach new configuration functions to :py:class:`waflib.Build.BuildContext` and
:py:class:`waflib.Configure.ConfigurationContext`. The methods bound will accept a parameter
named 'mandatory' to disable the configuration errors::
def configure(conf):
conf.find_program('abc', mandatory=False)
:param f: method to bind
:type f: function
"""
def fun(*k, **kw):
mandatory = kw.pop('mandatory', True)
try:
return f(*k, **kw)
except Errors.ConfigurationError:
if mandatory:
raise
fun.__name__ = f.__name__
setattr(ConfigurationContext, f.__name__, fun)
setattr(Build.BuildContext, f.__name__, fun)
return f
[docs]@conf
def add_os_flags(self, var, dest=None, dup=False):
"""
Import operating system environment values into ``conf.env`` dict::
def configure(conf):
conf.add_os_flags('CFLAGS')
:param var: variable to use
:type var: string
:param dest: destination variable, by default the same as var
:type dest: string
:param dup: add the same set of flags again
:type dup: bool
"""
try:
flags = shlex.split(self.environ[var])
except KeyError:
return
if dup or ''.join(flags) not in ''.join(Utils.to_list(self.env[dest or var])):
self.env.append_value(dest or var, flags)
[docs]@conf
def cmd_to_list(self, cmd):
"""
Detect if a command is written in pseudo shell like ``ccache g++`` and return a list.
:param cmd: command
:type cmd: a string or a list of string
"""
if isinstance(cmd, str):
if os.path.isfile(cmd):
# do not take any risk
return [cmd]
if os.sep == '/':
return shlex.split(cmd)
else:
try:
return shlex.split(cmd, posix=False)
except TypeError:
# Python 2.5 on windows?
return shlex.split(cmd)
return cmd
[docs]@conf
def check_waf_version(self, mini='1.9.99', maxi='2.1.0', **kw):
"""
Raise a Configuration error if the Waf version does not strictly match the given bounds::
conf.check_waf_version(mini='1.9.99', maxi='2.1.0')
:type mini: number, tuple or string
:param mini: Minimum required version
:type maxi: number, tuple or string
:param maxi: Maximum allowed version
"""
self.start_msg('Checking for waf version in %s-%s' % (str(mini), str(maxi)), **kw)
ver = Context.HEXVERSION
if Utils.num2ver(mini) > ver:
self.fatal('waf version should be at least %r (%r found)' % (Utils.num2ver(mini), ver))
if Utils.num2ver(maxi) < ver:
self.fatal('waf version should be at most %r (%r found)' % (Utils.num2ver(maxi), ver))
self.end_msg('ok', **kw)
[docs]@conf
def find_file(self, filename, path_list=[]):
"""
Find a file in a list of paths
:param filename: name of the file to search for
:param path_list: list of directories to search
:return: the first matching filename; else a configuration exception is raised
"""
for n in Utils.to_list(filename):
for d in Utils.to_list(path_list):
p = os.path.expanduser(os.path.join(d, n))
if os.path.exists(p):
return p
self.fatal('Could not find %r' % filename)
[docs]@conf
def find_program(self, filename, **kw):
"""
Search for a program on the operating system
When var is used, you may set os.environ[var] to help find a specific program version, for example::
$ CC='ccache gcc' waf configure
:param path_list: paths to use for searching
:type param_list: list of string
:param var: store the result to conf.env[var] where var defaults to filename.upper() if not provided; the result is stored as a list of strings
:type var: string
:param value: obtain the program from the value passed exclusively
:type value: list or string (list is preferred)
:param exts: list of extensions for the binary (do not add an extension for portability)
:type exts: list of string
:param msg: name to display in the log, by default filename is used
:type msg: string
:param interpreter: interpreter for the program
:type interpreter: ConfigSet variable key
:raises: :py:class:`waflib.Errors.ConfigurationError`
"""
exts = kw.get('exts', Utils.is_win32 and '.exe,.com,.bat,.cmd' or ',.sh,.pl,.py')
environ = kw.get('environ', getattr(self, 'environ', os.environ))
ret = ''
filename = Utils.to_list(filename)
msg = kw.get('msg', ', '.join(filename))
var = kw.get('var', '')
if not var:
var = re.sub(r'\W', '_', filename[0].upper())
path_list = kw.get('path_list', '')
if path_list:
path_list = Utils.to_list(path_list)
else:
path_list = environ.get('PATH', '').split(os.pathsep)
if kw.get('value'):
# user-provided in command-line options and passed to find_program
ret = self.cmd_to_list(kw['value'])
elif environ.get(var):
# user-provided in the os environment
ret = self.cmd_to_list(environ[var])
elif self.env[var]:
# a default option in the wscript file
ret = self.cmd_to_list(self.env[var])
else:
if not ret:
ret = self.find_binary(filename, exts.split(','), path_list)
if not ret and Utils.winreg:
ret = Utils.get_registry_app_path(Utils.winreg.HKEY_CURRENT_USER, filename)
if not ret and Utils.winreg:
ret = Utils.get_registry_app_path(Utils.winreg.HKEY_LOCAL_MACHINE, filename)
ret = self.cmd_to_list(ret)
if ret:
if len(ret) == 1:
retmsg = ret[0]
else:
retmsg = ret
else:
retmsg = False
self.msg('Checking for program %r' % msg, retmsg, **kw)
if not kw.get('quiet'):
self.to_log('find program=%r paths=%r var=%r -> %r' % (filename, path_list, var, ret))
if not ret:
self.fatal(kw.get('errmsg', '') or 'Could not find the program %r' % filename)
interpreter = kw.get('interpreter')
if interpreter is None:
if not Utils.check_exe(ret[0], env=environ):
self.fatal('Program %r is not executable' % ret)
self.env[var] = ret
else:
self.env[var] = self.env[interpreter] + ret
return ret
@conf
def find_binary(self, filenames, exts, paths):
for f in filenames:
for ext in exts:
exe_name = f + ext
if os.path.isabs(exe_name):
if os.path.isfile(exe_name):
return exe_name
else:
for path in paths:
x = os.path.expanduser(os.path.join(path, exe_name))
if os.path.isfile(x):
return x
return None
[docs]@conf
def run_build(self, *k, **kw):
"""
Create a temporary build context to execute a build. A temporary reference to that build
context is kept on self.test_bld for debugging purposes.
The arguments to this function are passed to a single task generator for that build.
Only three parameters are mandatory:
:param features: features to pass to a task generator created in the build
:type features: list of string
:param compile_filename: file to create for the compilation (default: *test.c*)
:type compile_filename: string
:param code: input file contents
:type code: string
Though this function returns *0* by default, the build may bind attribute named *retval* on the
build context object to return a particular value. See :py:func:`waflib.Tools.c_config.test_exec_fun` for example.
The temporary builds creates a temporary folder; the name of that folder is calculated
by hashing input arguments to this function, with the exception of :py:class:`waflib.ConfigSet.ConfigSet`
objects which are used for both reading and writing values.
This function also features a cache which is disabled by default; that cache relies
on the hash value calculated as indicated above::
def options(opt):
opt.add_option('--confcache', dest='confcache', default=0,
action='count', help='Use a configuration cache')
And execute the configuration with the following command-line::
$ waf configure --confcache
"""
buf = []
for key in sorted(kw.keys()):
v = kw[key]
if isinstance(v, ConfigSet.ConfigSet):
# values are being written to, so they are excluded from contributing to the hash
continue
elif hasattr(v, '__call__'):
buf.append(Utils.h_fun(v))
else:
buf.append(str(v))
h = Utils.h_list(buf)
dir = self.bldnode.abspath() + os.sep + (not Utils.is_win32 and '.' or '') + 'conf_check_' + Utils.to_hex(h)
cachemode = kw.get('confcache', getattr(Options.options, 'confcache', None))
if not cachemode and os.path.exists(dir):
shutil.rmtree(dir)
try:
os.makedirs(dir)
except OSError:
pass
try:
os.stat(dir)
except OSError:
self.fatal('cannot use the configuration test folder %r' % dir)
if cachemode == 1:
try:
proj = ConfigSet.ConfigSet(os.path.join(dir, 'cache_run_build'))
except EnvironmentError:
pass
else:
ret = proj['cache_run_build']
if isinstance(ret, str) and ret.startswith('Test does not build'):
self.fatal(ret)
return ret
bdir = os.path.join(dir, 'testbuild')
if not os.path.exists(bdir):
os.makedirs(bdir)
cls_name = kw.get('run_build_cls') or getattr(self, 'run_build_cls', 'build')
self.test_bld = bld = Context.create_context(cls_name, top_dir=dir, out_dir=bdir)
bld.init_dirs()
bld.progress_bar = 0
bld.targets = '*'
bld.logger = self.logger
bld.all_envs.update(self.all_envs) # not really necessary
bld.env = kw['env']
bld.kw = kw
bld.conf = self
kw['build_fun'](bld)
ret = -1
try:
try:
bld.compile()
except Errors.WafError:
ret = 'Test does not build: %s' % traceback.format_exc()
self.fatal(ret)
else:
ret = getattr(bld, 'retval', 0)
finally:
if cachemode:
# cache the results each time
proj = ConfigSet.ConfigSet()
proj['cache_run_build'] = ret
proj.store(os.path.join(dir, 'cache_run_build'))
else:
shutil.rmtree(dir)
return ret
@conf
def ret_msg(self, msg, args):
if isinstance(msg, str):
return msg
return msg(args)
@conf
def test(self, *k, **kw):
if not 'env' in kw:
kw['env'] = self.env.derive()
# validate_c for example
if kw.get('validate'):
kw['validate'](kw)
self.start_msg(kw['msg'], **kw)
ret = None
try:
ret = self.run_build(*k, **kw)
except self.errors.ConfigurationError:
self.end_msg(kw['errmsg'], 'YELLOW', **kw)
if Logs.verbose > 1:
raise
else:
self.fatal('The configuration failed')
else:
kw['success'] = ret
if kw.get('post_check'):
ret = kw['post_check'](kw)
if ret:
self.end_msg(kw['errmsg'], 'YELLOW', **kw)
self.fatal('The configuration failed %r' % ret)
else:
self.end_msg(self.ret_msg(kw['okmsg'], kw), **kw)
return ret
