def _run(exiter):
# Place the registration of the unhandled exception hook as early as possible in the code.
sys.excepthook = exiter.unhandled_exception_hook
# We want to present warnings to the user, set this up early to ensure all warnings are seen.
# The "default" action displays a warning for a particular file and line number exactly once.
# See https://docs.python.org/2/library/warnings.html#the-warnings-filter for the complete action
# list.
warnings.simplefilter("default")
# The GoalRunner will setup final logging below in `.setup()`, but span the gap until then.
logging.basicConfig(level=logging.INFO)
# This routes the warnings we enabled above through our loggers instead of straight to stderr raw.
logging.captureWarnings(True)
root_dir = get_buildroot()
if not os.path.exists(root_dir):
exiter.exit_and_fail(
'PANTS_BUILD_ROOT does not point to a valid path: {}'.format(
root_dir))
options_bootstrapper = OptionsBootstrapper()
plugin_resolver = PluginResolver(options_bootstrapper)
working_set = plugin_resolver.resolve()
goal_runner = GoalRunner(root_dir)
goal_runner.setup(options_bootstrapper, working_set)
exiter.apply_options(goal_runner.options)
result = goal_runner.run()
exiter.do_exit(result)
def plugin_resolution(chroot=None, plugins=None):
@contextmanager
def provide_chroot(existing):
if existing:
yield existing, False
else:
with temporary_dir() as new_chroot:
yield new_chroot, True
with provide_chroot(chroot) as (root_dir, create_artifacts):
env = {'PANTS_BOOTSTRAPDIR': root_dir}
repo_dir = None
if plugins:
repo_dir = os.path.join(root_dir, 'repo')
env.update(PANTS_PYTHON_REPOS_REPOS='[{!r}]'.format(repo_dir),
PANTS_PYTHON_REPOS_INDEXES='[]',
PANTS_PYTHON_SETUP_RESOLVER_CACHE_TTL='1')
plugin_list = []
for plugin in plugins:
version = None
if isinstance(plugin, tuple):
plugin, version = plugin
plugin_list.append('{}=={}'.format(plugin, version) if version else plugin)
if create_artifacts:
create_plugin(repo_dir, plugin, version)
env['PANTS_PLUGINS'] = '[{}]'.format(','.join(map(repr, plugin_list)))
configpath = os.path.join(root_dir, 'pants.ini')
if create_artifacts:
touch(configpath)
options_bootstrapper = OptionsBootstrapper(env=env, configpath=configpath, args=[])
plugin_resolver = PluginResolver(options_bootstrapper)
cache_dir = plugin_resolver.plugin_cache_dir
yield plugin_resolver.resolve(WorkingSet(entries=[])), root_dir, repo_dir, cache_dir
def __init__(self, options_bootstrapper, working_set=None, exiter=sys.exit):
"""
:param OptionsBootStrapper options_bootstrapper: An options bootstrapper instance.
:param pkg_resources.WorkingSet working_set: The working set of the current run as returned by
PluginResolver.resolve().
:param func exiter: A function that accepts an exit code value and exits (for tests).
"""
self._options_bootstrapper = options_bootstrapper
self._working_set = working_set or PluginResolver(self._options_bootstrapper).resolve()
self._exiter = exiter
