mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 01:22:30 +00:00
acb28e922b
Instead of "deps", "deps_neg", and "deps_any" fields, just have a single "deps" field, which changes from an array to a string. The string is now an expression, which can contain the operators &&, ||, !, and allows grouping with ( ). It's probably overkill. If it gets a maintenance burden, we can switch to specifiying the dep expressions as ASTs (or maybe eval()-able Python expressions), and we could simplify the code that determines the reason why a dependency is not fulfilled. The latter involves a complicated conversion of the expression AST to DNF. The parser is actually pretty simple, and pretty much follows: https://en.wikipedia.org/wiki/Shunting_yard_algorithm
225 lines
7.4 KiB
Python
225 lines
7.4 KiB
Python
from waflib.Errors import ConfigurationError, WafError
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from waflib.Configure import conf
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from waflib.Build import BuildContext
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from waflib.Logs import pprint
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import deps_parser
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import inflector
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class DependencyError(Exception):
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pass
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class Dependency(object):
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def __init__(self, ctx, known_deps, satisfied_deps, dependency):
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self.ctx = ctx
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self.known_deps = known_deps
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self.satisfied_deps = satisfied_deps
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self.identifier, self.desc = dependency['name'], dependency['desc']
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self.attributes = self.__parse_attributes__(dependency)
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known_deps.add(self.identifier)
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if 'deps' in self.attributes:
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self.ctx.ensure_dependency_is_known(self.attributes['deps'])
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def __parse_attributes__(self, dependency):
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if 'os_specific_checks' in dependency:
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all_chks = dependency['os_specific_checks']
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chks = [check for check in all_chks if check in self.satisfied_deps]
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if any(chks):
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return all_chks[chks[0]]
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return dependency
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def check(self):
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self.ctx.start_msg('Checking for {0}'.format(self.desc))
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try:
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self.check_group_disabled()
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self.check_disabled()
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self.check_dependencies()
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except DependencyError:
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# No check was run, since the prerequisites of the dependency are
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# not satisfied. Make sure the define is 'undefined' so that we
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# get a `#define YYY 0` in `config.h`.
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self.ctx.undefine(inflector.define_key(self.identifier))
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self.fatal_if_needed()
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return
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self.check_autodetect_func()
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def check_group_disabled(self):
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if 'groups' in self.attributes:
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groups = self.attributes['groups']
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disabled = (self.enabled_option(g) == False for g in groups)
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if any(disabled):
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self.skip()
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raise DependencyError
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def check_disabled(self):
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if self.enabled_option() == False:
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self.skip()
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raise DependencyError
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if self.enabled_option() == True:
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self.attributes['req'] = True
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self.attributes['fmsg'] = "You manually enabled the feature '{0}', but \
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the autodetection check failed.".format(self.identifier)
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def check_dependencies(self):
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if 'deps' in self.attributes:
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ok, why = deps_parser.check_dependency_expr(self.attributes['deps'],
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self.satisfied_deps)
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if not ok:
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self.skip(why)
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raise DependencyError
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def check_autodetect_func(self):
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if self.attributes['func'](self.ctx, self.identifier):
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self.success(self.identifier)
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else:
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self.fail()
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self.ctx.undefine(inflector.define_key(self.identifier))
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self.fatal_if_needed()
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def enabled_option(self, identifier=None):
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try:
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return getattr(self.ctx.options, self.enabled_option_repr(identifier))
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except AttributeError:
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pass
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return None
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def enabled_option_repr(self, identifier):
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return "enable_{0}".format(identifier or self.identifier)
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def success(self, depname):
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self.ctx.mark_satisfied(depname)
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self.ctx.end_msg(self.__message__('yes'))
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def fail(self, reason='no'):
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self.ctx.end_msg(self.__message__(reason), 'RED')
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def fatal_if_needed(self):
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if self.enabled_option() == False:
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return
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if self.attributes.get('req', False):
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raise ConfigurationError(self.attributes.get('fmsg', 'Unsatisfied requirement'))
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def skip(self, reason='disabled', color='YELLOW'):
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self.ctx.end_msg(self.__message__(reason), color)
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def __message__(self, message):
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optional_message = self.ctx.deps_msg.get(self.identifier)
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if optional_message:
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return "{0} ({1})".format(message, optional_message)
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else:
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return message
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def configure(ctx):
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def __detect_target_os_dependency__(ctx):
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target = "os-{0}".format(ctx.env.DEST_OS)
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ctx.start_msg('Detected target OS:')
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ctx.end_msg(target)
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ctx.known_deps.add(target)
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ctx.satisfied_deps.add(target)
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ctx.deps_msg = {}
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ctx.known_deps = set()
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ctx.satisfied_deps = set()
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__detect_target_os_dependency__(ctx)
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@conf
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def ensure_dependency_is_known(ctx, depnames):
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def check(ast):
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if isinstance(ast, deps_parser.AstSym):
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if (not ast.name.startswith('os-')) and ast.name not in ctx.known_deps:
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raise ConfigurationError(
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"error in dependencies definition: dependency {0} in"
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" {1} is unknown.".format(ast.name, depnames))
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elif isinstance(ast, deps_parser.AstOp):
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for sub in ast.sub:
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check(sub)
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else:
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assert False
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check(deps_parser.parse_expr(depnames))
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@conf
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def mark_satisfied(ctx, dependency_identifier):
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ctx.satisfied_deps.add(dependency_identifier)
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@conf
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def add_optional_message(ctx, dependency_identifier, message):
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ctx.deps_msg[dependency_identifier] = message
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@conf
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def parse_dependencies(ctx, dependencies):
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def __check_dependency__(ctx, dependency):
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Dependency(ctx,
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ctx.known_deps,
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ctx.satisfied_deps,
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dependency).check()
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[__check_dependency__(ctx, dependency) for dependency in dependencies]
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@conf
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def dependency_satisfied(ctx, dependency_identifier):
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ctx.ensure_dependency_is_known(dependency_identifier)
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ok, _ = deps_parser.check_dependency_expr(dependency_identifier,
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ctx.satisfied_deps)
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return ok
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@conf
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def store_dependencies_lists(ctx):
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ctx.env.known_deps = list(ctx.known_deps)
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ctx.env.satisfied_deps = list(ctx.satisfied_deps)
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@conf
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def unpack_dependencies_lists(ctx):
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ctx.known_deps = set(ctx.env.known_deps)
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ctx.satisfied_deps = set(ctx.env.satisfied_deps)
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def filtered_sources(ctx, sources):
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def __source_file__(source):
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if isinstance(source, tuple):
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return source[0]
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else:
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return source
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def __check_filter__(dependency):
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return dependency_satisfied(ctx, dependency)
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def __unpack_and_check_filter__(source):
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try:
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_, dependency = source
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return __check_filter__(dependency)
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except ValueError:
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return True
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return [__source_file__(source) for source in sources \
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if __unpack_and_check_filter__(source)]
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"""
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Like filtered_sources(), but pick only the first entry that matches, and
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return its filename.
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"""
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def pick_first_matching_dep(ctx, deps):
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files = filtered_sources(ctx, deps)
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if len(files) > 0:
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return files[0]
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else:
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raise DependencyError
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def env_fetch(tx):
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def fn(ctx):
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deps = ctx.env.satisfied_deps
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lists = [ctx.env[tx(dep)] for dep in deps if (tx(dep) in ctx.env)]
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return [item for sublist in lists for item in sublist]
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return fn
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def dependencies_use(ctx):
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return [inflector.storage_key(dep) for dep in ctx.env.satisfied_deps]
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BuildContext.filtered_sources = filtered_sources
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BuildContext.pick_first_matching_dep = pick_first_matching_dep
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BuildContext.dependencies_use = dependencies_use
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BuildContext.dependencies_includes = env_fetch(lambda x: "INCLUDES_{0}".format(x))
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BuildContext.dependency_satisfied = dependency_satisfied
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