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-rw-r--r--waftools/dependencies.py210
1 files changed, 210 insertions, 0 deletions
diff --git a/waftools/dependencies.py b/waftools/dependencies.py
new file mode 100644
index 0000000000..cd85180fae
--- /dev/null
+++ b/waftools/dependencies.py
@@ -0,0 +1,210 @@
+from waflib.Errors import ConfigurationError, WafError
+from waflib.Configure import conf
+from waflib.Build import BuildContext
+from waflib.Logs import pprint
+from inflectors import DependencyInflector
+
+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)
+
+ ctx.env.known_deps.add(self.identifier)
+ for dep_key in ['deps', 'deps_any', 'deps_neg']:
+ if dep_key in self.attributes:
+ deps = self.attributes[dep_key]
+ self.ctx.ensure_dependency_is_known(*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_disabled()
+ self.check_any_dependencies()
+ self.check_dependencies()
+ self.check_negative_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`.
+ def_key = DependencyInflector(self.identifier).define_key()
+ self.ctx.undefine(def_key)
+ self.fatal_if_needed()
+ return
+
+ self.check_autodetect_func()
+
+ 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_any_dependencies(self):
+ if 'deps_any' in self.attributes:
+ deps = set(self.attributes['deps_any'])
+ if len(deps & self.satisfied_deps) == 0:
+ self.skip("not found any of {0}".format(", ".join(deps)))
+ raise DependencyError
+
+ def check_dependencies(self):
+ if 'deps' in self.attributes:
+ deps = set(self.attributes['deps'])
+ if not deps <= self.satisfied_deps:
+ missing_deps = deps - self.satisfied_deps
+ self.skip("{0} not found".format(", ".join(missing_deps)))
+ raise DependencyError
+
+ def check_negative_dependencies(self):
+ if 'deps_neg' in self.attributes:
+ deps = set(self.attributes['deps_neg'])
+ if deps <= self.satisfied_deps:
+ conflicting_deps = deps & self.satisfied_deps
+ self.skip("{0} found".format(", ".join(conflicting_deps)), 'CYAN')
+ raise DependencyError
+
+ def check_autodetect_func(self):
+ if self.attributes['func'](self.ctx, self.identifier):
+ self.success(self.identifier)
+ else:
+ self.fail()
+ self.fatal_if_needed()
+
+ def enabled_option(self):
+ try:
+ return getattr(self.ctx.options, self.enabled_option_repr())
+ except AttributeError:
+ pass
+ return None
+
+ def enabled_option_repr(self):
+ return "enable_{0}".format(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['fmsg'])
+
+ 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.env.known_deps.add(target)
+ ctx.env.satisfied_deps.add(target)
+
+ ctx.deps_msg = {}
+ ctx.env['known_deps'] = set()
+ ctx.env['satisfied_deps'] = set()
+ __detect_target_os_dependency__(ctx)
+
+@conf
+def ensure_dependency_is_known(ctx, *depnames):
+ deps = set([d for d in depnames if not d.startswith('os-')])
+ if not deps <= ctx.env.known_deps:
+ raise ConfigurationError(
+ "error in dependencies definition: some dependencies in"
+ " {0} are unknown.".format(deps))
+
+
+@conf
+def mark_satisfied(ctx, dependency_identifier):
+ ctx.env.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.env.known_deps,
+ ctx.env.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)
+ return dependency_identifier in 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):
+ if dependency.find('!') == 0:
+ dependency = dependency.lstrip('!')
+ ctx.ensure_dependency_is_known(dependency)
+ return dependency not in ctx.env.satisfied_deps
+ else:
+ ctx.ensure_dependency_is_known(dependency)
+ return dependency in ctx.env.satisfied_deps
+
+ 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)]
+
+def env_fetch(tx):
+ def fn(ctx):
+ deps = list(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 [DependencyInflector(dep).storage_key() for \
+ dep in ctx.env.satisfied_deps]
+
+BuildContext.filtered_sources = filtered_sources
+BuildContext.dependencies_use = dependencies_use
+BuildContext.dependencies_includes = env_fetch(lambda x: "INCLUDES_{0}".format(x))
+BuildContext.dependency_satisfied = dependency_satisfied