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from waflib.Errors import ConfigurationError, WafError
from waflib.Configure import conf
from waflib.Build import BuildContext
from waflib.Logs import pprint
import deps_parser
import inflector
class DependencyError(Exception):
pass
class Dependency(object):
def __init__(self, ctx, known_deps, satisfied_deps, dependency):
self.ctx = ctx
self.known_deps = known_deps
self.satisfied_deps = satisfied_deps
self.identifier, self.desc = dependency['name'], dependency['desc']
self.attributes = self.__parse_attributes__(dependency)
known_deps.add(self.identifier)
if 'deps' in self.attributes:
self.ctx.ensure_dependency_is_known(self.attributes['deps'])
def __parse_attributes__(self, dependency):
if 'os_specific_checks' in dependency:
all_chks = dependency['os_specific_checks']
chks = [check for check in all_chks if check in self.satisfied_deps]
if any(chks):
return all_chks[chks[0]]
return dependency
def check(self):
self.ctx.start_msg('Checking for {0}'.format(self.desc))
try:
self.check_group_disabled()
self.check_disabled()
self.check_dependencies()
except DependencyError:
# No check was run, since the prerequisites of the dependency are
# not satisfied. Make sure the define is 'undefined' so that we
# get a `#define YYY 0` in `config.h`.
self.ctx.undefine(inflector.define_key(self.identifier))
self.fatal_if_needed()
return
self.check_autodetect_func()
def check_group_disabled(self):
if 'groups' in self.attributes:
groups = self.attributes['groups']
disabled = (self.enabled_option(g) == False for g in groups)
if any(disabled):
self.skip()
raise DependencyError
def check_disabled(self):
if self.enabled_option() == False:
self.skip()
raise DependencyError
if self.enabled_option() == True:
self.attributes['req'] = True
self.attributes['fmsg'] = "You manually enabled the feature '{0}', but \
the autodetection check failed.".format(self.identifier)
def check_dependencies(self):
if 'deps' in self.attributes:
ok, why = deps_parser.check_dependency_expr(self.attributes['deps'],
self.satisfied_deps)
if not ok:
self.skip(why)
raise DependencyError
def check_autodetect_func(self):
if self.attributes['func'](self.ctx, self.identifier):
self.success(self.identifier)
else:
self.fail()
self.ctx.undefine(inflector.define_key(self.identifier))
self.fatal_if_needed()
def enabled_option(self, identifier=None):
try:
return getattr(self.ctx.options, self.enabled_option_repr(identifier))
except AttributeError:
pass
return None
def enabled_option_repr(self, identifier):
return "enable_{0}".format(identifier or self.identifier)
def success(self, depname):
self.ctx.mark_satisfied(depname)
self.ctx.end_msg(self.__message__('yes'))
def fail(self, reason='no'):
self.ctx.end_msg(self.__message__(reason), 'RED')
def fatal_if_needed(self):
if self.enabled_option() == False:
return
if self.attributes.get('req', False):
raise ConfigurationError(self.attributes.get('fmsg', 'Unsatisfied requirement'))
def skip(self, reason='disabled', color='YELLOW'):
self.ctx.end_msg(self.__message__(reason), color)
def __message__(self, message):
optional_message = self.ctx.deps_msg.get(self.identifier)
if optional_message:
return "{0} ({1})".format(message, optional_message)
else:
return message
def configure(ctx):
def __detect_target_os_dependency__(ctx):
target = "os-{0}".format(ctx.env.DEST_OS)
ctx.start_msg('Detected target OS:')
ctx.end_msg(target)
ctx.known_deps.add(target)
ctx.satisfied_deps.add(target)
ctx.deps_msg = {}
ctx.known_deps = set()
ctx.satisfied_deps = set()
__detect_target_os_dependency__(ctx)
@conf
def ensure_dependency_is_known(ctx, depnames):
def check(ast):
if isinstance(ast, deps_parser.AstSym):
if (not ast.name.startswith('os-')) and ast.name not in ctx.known_deps:
raise ConfigurationError(
"error in dependencies definition: dependency {0} in"
" {1} is unknown.".format(ast.name, depnames))
elif isinstance(ast, deps_parser.AstOp):
for sub in ast.sub:
check(sub)
else:
assert False
check(deps_parser.parse_expr(depnames))
@conf
def mark_satisfied(ctx, dependency_identifier):
ctx.satisfied_deps.add(dependency_identifier)
@conf
def add_optional_message(ctx, dependency_identifier, message):
ctx.deps_msg[dependency_identifier] = message
@conf
def parse_dependencies(ctx, dependencies):
def __check_dependency__(ctx, dependency):
Dependency(ctx,
ctx.known_deps,
ctx.satisfied_deps,
dependency).check()
[__check_dependency__(ctx, dependency) for dependency in dependencies]
@conf
def dependency_satisfied(ctx, dependency_identifier):
ctx.ensure_dependency_is_known(dependency_identifier)
ok, _ = deps_parser.check_dependency_expr(dependency_identifier,
ctx.satisfied_deps)
return ok
@conf
def store_dependencies_lists(ctx):
ctx.env.known_deps = list(ctx.known_deps)
ctx.env.satisfied_deps = list(ctx.satisfied_deps)
@conf
def unpack_dependencies_lists(ctx):
ctx.known_deps = set(ctx.env.known_deps)
ctx.satisfied_deps = set(ctx.env.satisfied_deps)
def filtered_sources(ctx, sources):
def __source_file__(source):
if isinstance(source, tuple):
return source[0]
else:
return source
def __check_filter__(dependency):
return dependency_satisfied(ctx, dependency)
def __unpack_and_check_filter__(source):
try:
_, dependency = source
return __check_filter__(dependency)
except ValueError:
return True
return [__source_file__(source) for source in sources \
if __unpack_and_check_filter__(source)]
"""
Like filtered_sources(), but pick only the first entry that matches, and
return its filename.
"""
def pick_first_matching_dep(ctx, deps):
files = filtered_sources(ctx, deps)
if len(files) > 0:
return files[0]
else:
raise DependencyError
def env_fetch(tx):
def fn(ctx):
deps = ctx.env.satisfied_deps
lists = [ctx.env[tx(dep)] for dep in deps if (tx(dep) in ctx.env)]
return [item for sublist in lists for item in sublist]
return fn
def dependencies_use(ctx):
return [inflector.storage_key(dep) for dep in ctx.env.satisfied_deps]
BuildContext.filtered_sources = filtered_sources
BuildContext.pick_first_matching_dep = pick_first_matching_dep
BuildContext.dependencies_use = dependencies_use
BuildContext.dependencies_includes = env_fetch(lambda x: "INCLUDES_{0}".format(x))
BuildContext.dependency_satisfied = dependency_satisfied
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