class Options(object):
"""The outward-facing API for interacting with options.
Supports option registration and fetching option values.
Examples:
The value in global scope of option '--foo-bar' (registered in global scope) will be selected
in the following order:
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the PANTS_FOO_BAR environment variable.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in global scope) will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the PANTS_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in scope 'compile') will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini
(because of automatic config file fallback to that section).
- The hard-coded value provided at registration time.
- None.
"""
GLOBAL_SCOPE = GLOBAL_SCOPE
# Custom option types. You can specify these with type= when registering options.
# A dict-typed option.
dict = staticmethod(custom_types.dict_type)
# A list-typed option. Note that this is different than an action='append' option:
# An append option will append the cmd-line values to the default. A list-typed option
# will replace the default with the cmd-line value.
list = staticmethod(custom_types.list_type)
def __init__(self, env, config, known_scopes, args=sys.argv, bootstrap_option_values=None):
"""Create an Options instance.
:param env: a dict of environment variables.
:param config: data from a config file (must support config.get[list](section, name, default=)).
:param known_scopes: a list of all possible scopes that may be encountered.
:param args: a list of cmd-line args.
:param bootstrap_option_values: An optional namespace containing the values of bootstrap
options. We can use these values when registering other options.
"""
splitter = ArgSplitter(known_scopes)
self._goals, self._scope_to_flags, self._target_specs, self._passthru, self._passthru_owner = \
splitter.split_args(args)
if bootstrap_option_values:
target_spec_files = bootstrap_option_values.target_spec_files
if target_spec_files:
for spec in target_spec_files:
with open(spec) as f:
self._target_specs.extend(filter(None, [line.strip() for line in f]))
self._help_request = splitter.help_request
self._parser_hierarchy = ParserHierarchy(env, config, known_scopes, self._help_request)
self._values_by_scope = {} # Arg values, parsed per-scope on demand.
self._bootstrap_option_values = bootstrap_option_values
self._known_scopes = set(known_scopes)
@property
def target_specs(self):
"""The targets to operate on."""
return self._target_specs
@property
def goals(self):
"""The requested goals, in the order specified on the cmd line."""
return self._goals
def is_known_scope(self, scope):
"""Whether the given scope is known by this instance."""
return scope in self._known_scopes
def passthru_args_for_scope(self, scope):
# Passthru args "belong" to the last scope mentioned on the command-line.
# Note: If that last scope is a goal, we allow all tasks in that goal to access the passthru
# args. This is to allow the more intuitive
# pants run <target> -- <passthru args>
# instead of requiring
# pants run.py <target> -- <passthru args>.
#
# However note that in the case where multiple tasks run in the same goal, e.g.,
# pants test <target> -- <passthru args>
# Then, e.g., both junit and pytest will get the passthru args even though the user probably
# only intended them to go to one of them. If the wrong one is not a no-op then the error will
# be unpredictable. However this is not a common case, and can be circumvented with an
# explicit test.pytest or test.junit scope.
if (scope and self._passthru_owner and scope.startswith(self._passthru_owner) and
(len(scope) == len(self._passthru_owner) or scope[len(self._passthru_owner)] == '.')):
return self._passthru
else:
return []
def register(self, scope, *args, **kwargs):
"""Register an option in the given scope, using argparse params."""
self.get_parser(scope).register(*args, **kwargs)
def register_global(self, *args, **kwargs):
"""Register an option in the global scope, using argparse params."""
self.register(GLOBAL_SCOPE, *args, **kwargs)
def registration_function_for_global_scope(self):
"""Returns a function for registering argparse args on the global scope."""
return self.registration_function_for_scope(GLOBAL_SCOPE)
def registration_function_for_scope(self, scope):
"""Returns a function for registering argparse args on the given scope."""
# TODO(benjy): Make this an instance of a class that implements __call__, so we can
# docstring it, and so it's less weird than attatching properties to a function.
def register(*args, **kwargs):
self.register(scope, *args, **kwargs)
# Clients can access the bootstrap option values as register.bootstrap.
register.bootstrap = self.bootstrap_option_values()
# Clients can access the scope as register.scope.
register.scope = scope
return register
def get_parser(self, scope):
"""Returns the parser for the given scope, so code can register on it directly."""
return self._parser_hierarchy.get_parser_by_scope(scope)
def get_global_parser(self):
"""Returns the parser for the global scope, so code can register on it directly."""
return self.get_parser(GLOBAL_SCOPE)
def for_scope(self, scope):
"""Return the option values for the given scope.
Values are attributes of the returned object, e.g., options.foo.
Computed lazily per scope.
"""
# Short-circuit, if already computed.
if scope in self._values_by_scope:
return self._values_by_scope[scope]
# First get enclosing scope's option values, if any.
if scope == GLOBAL_SCOPE:
values = OptionValueContainer()
else:
values = copy.deepcopy(self.for_scope(scope.rpartition('.')[0]))
# Now add our values.
flags_in_scope = self._scope_to_flags.get(scope, [])
self._parser_hierarchy.get_parser_by_scope(scope).parse_args(flags_in_scope, values)
self._values_by_scope[scope] = values
return values
def __getitem__(self, scope):
# TODO(John Sirois): Mainly supports use of dict<str, dict<str, str>> for mock options in tests,
# Consider killing if tests consolidate on using TestOptions instead of the raw dicts.
return self.for_scope(scope)
def bootstrap_option_values(self):
"""Return the option values for bootstrap options.
General code can also access these values in the global scope. But option registration code
cannot, hence this special-casing of this small set of options.
"""
return self._bootstrap_option_values
def for_global_scope(self):
"""Return the option values for the global scope."""
return self.for_scope(GLOBAL_SCOPE)
def print_help_if_requested(self):
"""If help was requested, print it and return True.
Otherwise return False.
"""
if self._help_request:
if self._help_request.version:
print(pants_version())
else:
self._print_help()
return True
else:
return False
def _print_help(self):
"""Print a help screen, followed by an optional message.
Note: Ony useful if called after options have been registered.
"""
def _maybe_help(scope):
s = self._format_help_for_scope(scope)
if s != '': # Avoid printing scope name for scope with empty options.
print(scope)
for line in s.split('\n'):
if line != '': # Avoid superfluous blank lines for empty strings.
print(' {0}'.format(line))
show_all_help = self._help_request and self._help_request.all_scopes
goals = (Goal.all() if show_all_help else [Goal.by_name(goal_name) for goal_name in self.goals])
if goals:
for goal in goals:
if not goal.ordered_task_names():
print('\nUnknown goal: {}'.format(goal.name))
else:
print('\n{0}: {1}\n'.format(goal.name, goal.description))
for scope in goal.known_scopes():
_maybe_help(scope)
else:
print(pants_release())
print('\nUsage:')
print(' ./pants [option ...] [goal ...] [target...] Attempt the specified goals.')
print(' ./pants help Get help.')
print(' ./pants help [goal] Get help for a goal.')
print(' ./pants help-advanced [goal] Get help for a goal\'s advanced options.')
print(' ./pants help-all Get help for all goals.')
print(' ./pants goals List all installed goals.')
print('')
print(' [target] accepts two special forms:')
print(' dir: to include all targets in the specified directory.')
print(' dir:: to include all targets found recursively under the directory.')
print('\nFriendly docs:\n http://pantsbuild.github.io/')
if show_all_help or not goals:
print('\nGlobal options:')
print(self.get_global_parser().format_help())
def _format_help_for_scope(self, scope):
"""Generate a help message for options at the specified scope."""
return self.get_parser(scope).format_help()
class Options(object):
"""The outward-facing API for interacting with options.
Supports option registration and fetching option values.
Examples:
The value in global scope of option '--foo-bar' (registered in global scope) will be selected
in the following order:
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in global scope) will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in scope 'compile') will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini
(because of automatic config file fallback to that section).
- The hard-coded value provided at registration time.
- None.
"""
def __init__(self, env, config, known_scopes, args=sys.argv, legacy_parser=None):
"""Create an Options instance.
:param env: a dict of environment variables.
:param config: data from a config file (must support config.get(section, name, default=)).
:param known_scopes: a list of all possible scopes that may be encountered.
:param args: a list of cmd-line args.
:param legacy_parser: optional instance of optparse.OptionParser, used to register and access
the old-style flags during migration.
"""
splitter = ArgSplitter(known_scopes)
self._scope_to_flags, self._target_specs, self._passthru = splitter.split_args(args)
self._is_help = splitter.is_help
self._parser_hierarchy = ParserHierarchy(env, config, known_scopes, legacy_parser)
self._legacy_parser = legacy_parser # Old-style options, used temporarily during transition.
self._legacy_values = None # Values parsed from old-stype options.
self._values_by_scope = {} # Arg values, parsed per-scope on demand.
@property
def target_specs(self):
"""The targets to operate on."""
return self._target_specs
@property
def goals(self):
"""The requested goals, in the order specified on the cmd-line."""
return OrderedSet([g.partition('.')[0] for g in self._scope_to_flags.keys() if g])
@property
def is_help(self):
"""Whether the command line indicates a request for help."""
return self._is_help
def set_legacy_values(self, legacy_values):
"""Override the values with those parsed from legacy flags."""
self._legacy_values = legacy_values
def format_global_help(self, legacy=False):
"""Generate a help message for global options."""
return self.get_global_parser().format_help(legacy=legacy)
def format_help(self, scope, legacy=False):
"""Generate a help message for options at the specified scope."""
return self.get_parser(scope).format_help(legacy=legacy)
def register(self, scope, *args, **kwargs):
"""Register an option in the given scope, using argparse params."""
self.get_parser(scope).register(*args, **kwargs)
def register_global(self, *args, **kwargs):
"""Register an option in the global scope, using argparse params."""
self.register(GLOBAL_SCOPE, *args, **kwargs)
def get_parser(self, scope):
"""Returns the parser for the given scope, so code can register on it directly."""
return self._parser_hierarchy.get_parser_by_scope(scope)
def get_global_parser(self):
"""Returns the parser for the global scope, so code can register on it directly."""
return self.get_parser(GLOBAL_SCOPE)
def for_scope(self, scope):
"""Return the option values for the given scope.
Values are attributes of the returned object, e.g., options.foo.
Computed lazily per scope.
"""
# Short-circuit, if already computed.
if scope in self._values_by_scope:
return self._values_by_scope[scope]
# First get enclosing scope's option values, if any.
if scope == GLOBAL_SCOPE:
values = OptionValueContainer()
if self._legacy_values:
values.update(vars(self._legacy_values)) # Proxy any legacy option values.
else:
values = copy.deepcopy(self.for_scope(scope.rpartition('.')[0]))
# Now add our values.
flags_in_scope = self._scope_to_flags.get(scope, [])
self._parser_hierarchy.get_parser_by_scope(scope).parse_args(flags_in_scope, values)
self._values_by_scope[scope] = values
return values
def for_global_scope(self):
"""Return the option values for the global scope."""
return self.for_scope(GLOBAL_SCOPE)
def print_help(self, msg=None, goals=None, legacy=False):
"""Print a help screen, followed by an optional message.
Note: Ony useful if called after options have been registered.
"""
def _maybe_help(scope):
s = self.format_help(scope, legacy=legacy)
if s != '': # Avoid superfluous blank lines for empty strings.
print(s)
goals = goals or self.goals
if goals:
for goal_name in goals:
goal = Goal.by_name(goal_name)
if not goal.ordered_task_names():
print('\nUnknown goal: %s' % goal_name)
else:
print('\n{0}: {1}\n'.format(goal.name, goal.description))
for scope in goal.known_scopes():
_maybe_help(scope)
else:
print(pants_release())
print('\nUsage:')
print(' ./pants [option ...] [goal ...] [target...] Attempt the specified goals.')
print(' ./pants help Get help.')
print(' ./pants help [goal] Get help for the specified goal.')
print(' ./pants goal goals List all installed goals.')
print('')
print(' [target] accepts two special forms:')
print(' dir: to include all targets in the specified directory.')
print(' dir:: to include all targets found recursively under the directory.')
print('\nFriendly docs:\n http://pantsbuild.github.io/')
print('\nGlobal options:')
print(self.format_global_help())
if msg is not None:
print(msg)
class Options(object):
"""The outward-facing API for interacting with options.
Supports option registration and fetching option values.
Examples:
The value in global scope of option '--foo-bar' (registered in global scope) will be selected
in the following order:
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the PANTS_FOO_BAR environment variable.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in global scope) will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the PANTS_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in scope 'compile') will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini
(because of automatic config file fallback to that section).
- The hard-coded value provided at registration time.
- None.
"""
GLOBAL_SCOPE = GLOBAL_SCOPE
# Custom option types. You can specify these with type= when registering options.
# A dict-typed option.
dict = staticmethod(custom_types.dict_type)
# A list-typed option. Note that this is different than an action='append' option:
# An append option will append the cmd-line values to the default. A list-typed option
# will replace the default with the cmd-line value.
list = staticmethod(custom_types.list_type)
# A list-typed option that indicates the list elements are target specs.
target_list = staticmethod(custom_types.target_list_type)
# A string-typed option that indicates the string is a filepath.
file = staticmethod(custom_types.file_type)
@classmethod
def complete_scopes(cls, scope_infos):
"""Expand a set of scopes to include all enclosing scopes.
E.g., if the set contains `foo.bar.baz`, ensure that it also contains `foo.bar` and `foo`.
"""
ret = {ScopeInfo.for_global_scope()}
for scope_info in scope_infos:
ret.add(scope_info)
original_scopes = {si.scope for si in scope_infos}
for scope_info in scope_infos:
scope = scope_info.scope
while scope != '':
if scope not in original_scopes:
ret.add(ScopeInfo(scope, ScopeInfo.INTERMEDIATE))
scope = scope.rpartition('.')[0]
return ret
def __init__(self, env, config, known_scope_infos, args=sys.argv, bootstrap_option_values=None):
"""Create an Options instance.
:param env: a dict of environment variables.
:param config: data from a config file (must support config.get[list](section, name, default=)).
:param known_scope_infos: ScopeInfos for all scopes that may be encountered.
:param args: a list of cmd-line args.
:param bootstrap_option_values: An optional namespace containing the values of bootstrap
options. We can use these values when registering other options.
"""
# We need parsers for all the intermediate scopes, so inherited option values
# can propagate through them.
complete_known_scope_infos = self.complete_scopes(known_scope_infos)
splitter = ArgSplitter(complete_known_scope_infos)
self._goals, self._scope_to_flags, self._target_specs, self._passthru, self._passthru_owner = \
splitter.split_args(args)
if bootstrap_option_values:
target_spec_files = bootstrap_option_values.target_spec_files
if target_spec_files:
for spec in target_spec_files:
with open(spec) as f:
self._target_specs.extend(filter(None, [line.strip() for line in f]))
self._help_request = splitter.help_request
self._parser_hierarchy = ParserHierarchy(env, config, complete_known_scope_infos)
self._values_by_scope = {} # Arg values, parsed per-scope on demand.
self._bootstrap_option_values = bootstrap_option_values
self._known_scopes = set([s[0] for s in known_scope_infos])
@property
def target_specs(self):
"""The targets to operate on."""
return self._target_specs
@property
def goals(self):
"""The requested goals, in the order specified on the cmd line."""
return self._goals
def is_known_scope(self, scope):
"""Whether the given scope is known by this instance."""
return scope in self._known_scopes
def passthru_args_for_scope(self, scope):
# Passthru args "belong" to the last scope mentioned on the command-line.
# Note: If that last scope is a goal, we allow all tasks in that goal to access the passthru
# args. This is to allow the more intuitive
# pants run <target> -- <passthru args>
# instead of requiring
# pants run.py <target> -- <passthru args>.
#
# However note that in the case where multiple tasks run in the same goal, e.g.,
# pants test <target> -- <passthru args>
# Then, e.g., both junit and pytest will get the passthru args even though the user probably
# only intended them to go to one of them. If the wrong one is not a no-op then the error will
# be unpredictable. However this is not a common case, and can be circumvented with an
# explicit test.pytest or test.junit scope.
if (scope and self._passthru_owner and scope.startswith(self._passthru_owner) and
(len(scope) == len(self._passthru_owner) or scope[len(self._passthru_owner)] == '.')):
return self._passthru
else:
return []
def register(self, scope, *args, **kwargs):
"""Register an option in the given scope, using argparse params."""
self.get_parser(scope).register(*args, **kwargs)
def registration_function_for_optionable(self, optionable_class):
"""Returns a function for registering argparse args on the given scope."""
# TODO(benjy): Make this an instance of a class that implements __call__, so we can
# docstring it, and so it's less weird than attatching properties to a function.
def register(*args, **kwargs):
kwargs['registering_class'] = optionable_class
self.register(optionable_class.options_scope, *args, **kwargs)
# Clients can access the bootstrap option values as register.bootstrap.
register.bootstrap = self.bootstrap_option_values()
# Clients can access the scope as register.scope.
register.scope = optionable_class.options_scope
return register
def get_parser(self, scope):
"""Returns the parser for the given scope, so code can register on it directly."""
return self._parser_hierarchy.get_parser_by_scope(scope)
def walk_parsers(self, callback):
self._parser_hierarchy.walk(callback)
def for_scope(self, scope):
"""Return the option values for the given scope.
Values are attributes of the returned object, e.g., options.foo.
Computed lazily per scope.
"""
# Short-circuit, if already computed.
if scope in self._values_by_scope:
return self._values_by_scope[scope]
# First get enclosing scope's option values, if any.
if scope == GLOBAL_SCOPE:
values = OptionValueContainer()
else:
values = copy.deepcopy(self.for_scope(scope.rpartition('.')[0]))
# Now add our values.
flags_in_scope = self._scope_to_flags.get(scope, [])
self._parser_hierarchy.get_parser_by_scope(scope).parse_args(flags_in_scope, values)
self._values_by_scope[scope] = values
return values
def registration_args_iter_for_scope(self, scope):
"""Returns an iterator over the registration arguments of each option in this scope.
See `Parser.registration_args_iter` for details.
"""
return self._parser_hierarchy.get_parser_by_scope(scope).registration_args_iter()
def payload_for_scope(self, scope):
"""Returns a payload representing the options for the given scope."""
payload = Payload()
for (name, _, kwargs) in self.registration_args_iter_for_scope(scope):
if not kwargs.get('fingerprint', False):
continue
val = self.for_scope(scope)[name]
val_type = kwargs.get('type', '')
if val_type == Options.file:
field = FileField(val)
elif val_type == Options.target_list:
field = TargetListField(val)
else:
field = PrimitiveField(val)
payload.add_field(name, field)
payload.freeze()
return payload
def __getitem__(self, scope):
# TODO(John Sirois): Mainly supports use of dict<str, dict<str, str>> for mock options in tests,
# Consider killing if tests consolidate on using TestOptions instead of the raw dicts.
return self.for_scope(scope)
def bootstrap_option_values(self):
"""Return the option values for bootstrap options.
General code can also access these values in the global scope. But option registration code
cannot, hence this special-casing of this small set of options.
"""
return self._bootstrap_option_values
def for_global_scope(self):
"""Return the option values for the global scope."""
return self.for_scope(GLOBAL_SCOPE)
def print_help_if_requested(self):
"""If help was requested, print it and return True.
Otherwise return False.
"""
if self._help_request:
if self._help_request.version:
print(pants_version())
else:
self._print_help()
return True
else:
return False
def _print_help(self):
"""Print a help screen, followed by an optional message.
Note: Ony useful if called after options have been registered.
"""
show_all_help = self._help_request and self._help_request.all_scopes
goals = (Goal.all() if show_all_help else [Goal.by_name(goal_name) for goal_name in self.goals])
if goals:
for goal in goals:
if not goal.ordered_task_names():
print('\nUnknown goal: {}'.format(goal.name))
else:
print('\n{0}: {1}\n'.format(goal.name, goal.description))
for scope_info in goal.known_scope_infos():
help_str = self._format_help_for_scope(scope_info.scope)
if help_str:
print(help_str)
else:
print(pants_release())
print('\nUsage:')
print(' ./pants [option ...] [goal ...] [target...] Attempt the specified goals.')
print(' ./pants help Get help.')
print(' ./pants help [goal] Get help for a goal.')
print(' ./pants help-advanced [goal] Get help for a goal\'s advanced options.')
print(' ./pants help-all Get help for all goals.')
print(' ./pants goals List all installed goals.')
print('')
print(' [target] accepts two special forms:')
print(' dir: to include all targets in the specified directory.')
print(' dir:: to include all targets found recursively under the directory.')
print('\nFriendly docs:\n http://pantsbuild.github.io/')
if show_all_help or not goals:
print(self.get_parser(GLOBAL_SCOPE).format_help('Global', self._help_request.advanced))
def _format_help_for_scope(self, scope):
"""Generate a help message for options at the specified scope."""
return self.get_parser(scope).format_help(scope, self._help_request.advanced)
class Options(object):
"""The outward-facing API for interacting with options.
Supports option registration and fetching option values.
Examples:
The value in global scope of option '--foo-bar' (registered in global scope) will be selected
in the following order:
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in global scope) will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in scope 'compile') will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini
(because of automatic config file fallback to that section).
- The hard-coded value provided at registration time.
- None.
"""
# Custom option types. You can specify these with type= when registering options.
# A dict-typed option.
dict = staticmethod(custom_types.dict_type)
# A list-typed option. Note that this is different than an action='append' option:
# An append option will append the cmd-line values to the default. A list-typed option
# will replace the default with the cmd-line value.
list = staticmethod(custom_types.list_type)
def __init__(self,
env,
config,
known_scopes,
args=sys.argv,
bootstrap_option_values=None):
"""Create an Options instance.
:param env: a dict of environment variables.
:param config: data from a config file (must support config.get[list](section, name, default=)).
:param known_scopes: a list of all possible scopes that may be encountered.
:param args: a list of cmd-line args.
:param bootstrap_option_values: An optional namespace containing the values of bootstrap
options. We can use these values when registering other options.
"""
splitter = ArgSplitter(known_scopes)
self._goals, self._scope_to_flags, self._target_specs, self._passthru, self._passthru_owner = \
splitter.split_args(args)
self._is_help = splitter.is_help
self._parser_hierarchy = ParserHierarchy(env, config, known_scopes)
self._values_by_scope = {} # Arg values, parsed per-scope on demand.
self._bootstrap_option_values = bootstrap_option_values
@property
def target_specs(self):
"""The targets to operate on."""
return self._target_specs
@property
def goals(self):
"""The requested goals, in the order specified on the cmd line."""
return self._goals
def passthru_args_for_scope(self, scope):
# Passthru args "belong" to the last scope mentioned on the command-line.
# Note: If that last scope is a goal, we allow all tasks in that goal to access the passthru
# args. This is to allow the more intuitive
# pants run <target> -- <passthru args>
# instead of requiring
# pants run.py <target> -- <passthru args>.
#
# However note that in the case where multiple tasks run in the same goal, e.g.,
# pants test <target> -- <passthru args>
# Then, e.g., both junit and pytest will get the passthru args even though the user probably
# only intended them to go to one of them. If the wrong one is not a no-op then the error will
# be unpredictable. However this is not a common case, and can be circumvented with an
# explicit test.pytest or test.junit scope.
if (scope and self._passthru_owner
and scope.startswith(self._passthru_owner)
and (len(scope) == len(self._passthru_owner)
or scope[len(self._passthru_owner)] == '.')):
return self._passthru
else:
return []
@property
def is_help(self):
"""Whether the command line indicates a request for help."""
return self._is_help
def format_global_help(self):
"""Generate a help message for global options."""
return self.get_global_parser().format_help()
def format_help(self, scope):
"""Generate a help message for options at the specified scope."""
return self.get_parser(scope).format_help()
def register(self, scope, *args, **kwargs):
"""Register an option in the given scope, using argparse params."""
self.get_parser(scope).register(*args, **kwargs)
def register_global(self, *args, **kwargs):
"""Register an option in the global scope, using argparse params."""
self.register(GLOBAL_SCOPE, *args, **kwargs)
def get_parser(self, scope):
"""Returns the parser for the given scope, so code can register on it directly."""
return self._parser_hierarchy.get_parser_by_scope(scope)
def get_global_parser(self):
"""Returns the parser for the global scope, so code can register on it directly."""
return self.get_parser(GLOBAL_SCOPE)
def for_scope(self, scope):
"""Return the option values for the given scope.
Values are attributes of the returned object, e.g., options.foo.
Computed lazily per scope.
"""
# Short-circuit, if already computed.
if scope in self._values_by_scope:
return self._values_by_scope[scope]
# First get enclosing scope's option values, if any.
if scope == GLOBAL_SCOPE:
values = OptionValueContainer()
else:
values = copy.deepcopy(self.for_scope(scope.rpartition('.')[0]))
# Now add our values.
flags_in_scope = self._scope_to_flags.get(scope, [])
self._parser_hierarchy.get_parser_by_scope(scope).parse_args(
flags_in_scope, values)
self._values_by_scope[scope] = values
return values
def bootstrap_option_values(self):
"""Return the option values for bootstrap options.
General code can also access these values in the global scope. But option registration code
cannot, hence this special-casing of this small set of options.
"""
return self._bootstrap_option_values
def for_global_scope(self):
"""Return the option values for the global scope."""
return self.for_scope(GLOBAL_SCOPE)
def print_help(self, msg=None, goals=None):
"""Print a help screen, followed by an optional message.
Note: Ony useful if called after options have been registered.
"""
def _maybe_help(scope):
s = self.format_help(scope)
if s != '': # Avoid printing scope name for scope with empty options.
print(scope)
for line in s.split('\n'):
if line != '': # Avoid superfluous blank lines for empty strings.
print(' {0}'.format(line))
goals = goals or self.goals
if goals:
for goal_name in goals:
goal = Goal.by_name(goal_name)
if not goal.ordered_task_names():
print('\nUnknown goal: %s' % goal_name)
else:
print('\n{0}: {1}\n'.format(goal.name, goal.description))
for scope in goal.known_scopes():
_maybe_help(scope)
else:
print(pants_release())
print('\nUsage:')
print(
' ./pants [option ...] [goal ...] [target...] Attempt the specified goals.'
)
print(' ./pants help Get help.')
print(
' ./pants help [goal] Get help for the specified goal.'
)
print(
' ./pants goal goals List all installed goals.'
)
print('')
print(' [target] accepts two special forms:')
print(
' dir: to include all targets in the specified directory.')
print(
' dir:: to include all targets found recursively under the directory.'
)
print('\nFriendly docs:\n http://pantsbuild.github.io/')
print('\nGlobal options:')
print(self.format_global_help())
if msg is not None:
print(msg)
class Options(object):
"""The outward-facing API for interacting with options.
Supports option registration and fetching option values.
Examples:
The value in global scope of option '--foo-bar' (registered in global scope) will be selected
in the following order:
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in global scope) will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the --foo-bar flag in global scope.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the PANTS_DEFAULT_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini.
- The hard-coded value provided at registration time.
- None.
The value in scope 'compile.java' of option '--foo-bar' (registered in scope 'compile') will be
selected in the following order:
- The value of the --foo-bar flag in scope 'compile.java'.
- The value of the --foo-bar flag in scope 'compile'.
- The value of the PANTS_COMPILE_JAVA_FOO_BAR environment variable.
- The value of the PANTS_COMPILE_FOO_BAR environment variable.
- The value of the foo_bar key in the [compile.java] section of pants.ini.
- The value of the foo_bar key in the [compile] section of pants.ini.
- The value of the foo_bar key in the [DEFAULT] section of pants.ini
(because of automatic config file fallback to that section).
- The hard-coded value provided at registration time.
- None.
"""
def __init__(self,
env,
config,
known_scopes,
args=sys.argv,
legacy_parser=None):
"""Create an Options instance.
:param env: a dict of environment variables.
:param config: data from a config file (must support config.get(section, name, default=)).
:param known_scopes: a list of all possible scopes that may be encountered.
:param args: a list of cmd-line args.
:param legacy_parser: optional instance of optparse.OptionParser, used to register and access
the old-style flags during migration.
"""
splitter = ArgSplitter(known_scopes)
self._scope_to_flags, self._target_specs = splitter.split_args(args)
self._is_help = splitter.is_help
self._parser_hierarchy = ParserHierarchy(env, config, known_scopes,
legacy_parser)
self._legacy_parser = legacy_parser # Old-style options, used temporarily during transition.
self._legacy_values = None # Values parsed from old-stype options.
self._values_by_scope = {} # Arg values, parsed per-scope on demand.
@property
def target_specs(self):
"""The targets to operate on."""
return self._target_specs
@property
def goals(self):
"""The requested goals."""
# TODO: Order them in some way? We don't know anything about the topological
# order here, but it would be nice to, e.g., display help in that order.
return set(
[g.partition('.')[0] for g in self._scope_to_flags.keys() if g])
@property
def is_help(self):
"""Whether the command line indicates a request for help."""
return self._is_help
def set_legacy_values(self, legacy_values):
"""Override the values with those parsed from legacy flags."""
self._legacy_values = legacy_values
def format_global_help(self, legacy=False):
"""Generate a help message for global options."""
return self.get_global_parser().format_help(legacy=legacy)
def format_help(self, scope, legacy=False):
"""Generate a help message for options at the specified scope."""
return self.get_parser(scope).format_help(legacy=legacy)
def register(self, scope, *args, **kwargs):
"""Register an option in the given scope, using argparse params."""
self.get_parser(scope).register(*args, **kwargs)
def register_global(self, *args, **kwargs):
"""Register an option in the global scope, using argparse params."""
self.register(GLOBAL_SCOPE, *args, **kwargs)
def get_parser(self, scope):
"""Returns the parser for the given scope, so code can register on it directly."""
return self._parser_hierarchy.get_parser_by_scope(scope)
def get_global_parser(self):
"""Returns the parser for the global scope, so code can register on it directly."""
return self.get_parser(GLOBAL_SCOPE)
def for_scope(self, scope):
"""Return the option values for the given scope.
Values are attributes of the returned object, e.g., options.foo.
Computed lazily per scope.
"""
# Short-circuit, if already computed.
if scope in self._values_by_scope:
return self._values_by_scope[scope]
# First get enclosing scope's option values, if any.
if scope == GLOBAL_SCOPE:
values = OptionValueContainer()
if self._legacy_values:
values.update(vars(
self._legacy_values)) # Proxy any legacy option values.
else:
values = copy.copy(self.for_scope(scope.rpartition('.')[0]))
# Now add our values.
try:
flags_in_scope = self._scope_to_flags.get(scope, [])
self._parser_hierarchy.get_parser_by_scope(scope).parse_args(
flags_in_scope, values)
self._values_by_scope[scope] = values
return values
except ParseError as e:
self.print_help(str(e))
sys.exit(1)
def for_global_scope(self):
"""Return the option values for the global scope."""
return self.for_scope(GLOBAL_SCOPE)
def print_help(self, msg=None, goals=None, legacy=False):
"""Print a help screen, followed by an optional message.
Note: Ony useful if called after options have been registered.
"""
def _maybe_print(s):
if s != '': # Avoid superfluous blank lines for empty strings.
print(s)
goals = goals or self.goals
if goals:
for goal_name in goals:
goal = Goal.by_name(goal_name)
if not goal.ordered_task_names():
print('\nUnknown goal: %s' % goal_name)
else:
_maybe_print(
self.format_help('%s' % goal.name, legacy=legacy))
for task_name in goal.ordered_task_names():
if task_name != goal.name: # Otherwise we registered on the goal scope.
scope = '%s.%s' % (goal.name, task_name)
_maybe_print(self.format_help(scope,
legacy=legacy))
else:
print(pants_release())
print('\nUsage:')
print(
' ./pants [option ...] [goal ...] [target...] Attempt the specified goals.'
)
print(' ./pants help Get help.')
print(
' ./pants help [goal] Get help for the specified goal.'
)
print(
' ./pants goals List all installed goals.'
)
print('')
print(' [target] accepts two special forms:')
print(
' dir: to include all targets in the specified directory.')
print(
' dir:: to include all targets found recursively under the directory.'
)
print('\nFriendly docs:\n http://pantsbuild.github.io/')
print('\nGlobal options:')
print(self.format_global_help())
if msg is not None:
print(msg)
