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test_build_file_parser.py
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test_build_file_parser.py
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# coding=utf-8
# Copyright 2014 Pants project contributors (see CONTRIBUTORS.md).
# Licensed under the Apache License, Version 2.0 (see LICENSE).
from __future__ import absolute_import, division, print_function, unicode_literals
import os
from builtins import str
from collections import namedtuple
from textwrap import dedent
from future.utils import PY3
from pants.base.build_file import BuildFile
from pants.base.file_system_project_tree import FileSystemProjectTree
from pants.build_graph.address import BuildFileAddress
from pants.build_graph.build_configuration import BuildConfiguration
from pants.build_graph.build_file_aliases import BuildFileAliases
from pants.build_graph.build_file_parser import BuildFileParser
from pants.build_graph.target import Target
from pants_test.base_test import BaseTest
class ErrorTarget(Target):
def __init__(self, *args, **kwargs):
assert False, "This fake target should never be initialized in this test!"
class BaseTestWithParser(BaseTest):
def setUp(self):
super(BaseTestWithParser, self).setUp()
build_configuration = BuildConfiguration()
build_configuration.register_aliases(self.alias_groups)
self.build_file_parser = BuildFileParser(build_configuration, self.build_root)
class BuildFileParserBasicsTest(BaseTestWithParser):
@property
def alias_groups(self):
return BuildFileAliases(targets={'jvm_binary': ErrorTarget,
'java_library': ErrorTarget})
def create_buildfile(self, path):
return BuildFile(FileSystemProjectTree(self.build_root), path)
def assert_parser_error(self, build_file, err_string):
with self.assertRaises(BuildFileParser.BuildFileParserError) as ctx:
self.build_file_parser.parse_build_file(build_file)
self.assertIn(err_string, str(ctx.exception))
def test_name_injection(self):
# Target with no name is fine: target gets name of directory.
self.add_to_build_file('foo/bar/BUILD', '\njava_library()\n')
build_file = self.create_buildfile('foo/bar/BUILD')
addresses = list(self.build_file_parser.parse_build_file(build_file).keys())
self.assertEqual(1, len(addresses))
self.assertEqual('bar', addresses[0].target_name)
# Two targets with no name in the same BUILD file cause an error.
self.add_to_build_file('foo/bar/BUILD', '\njvm_binary()\n')
self.assert_parser_error(build_file, "defines address 'bar' more than once")
# Test that omitting the name in a target at the build root is disallowed.
self.add_to_build_file('BUILD', '\njava_library()\n')
build_file = self.create_buildfile('BUILD')
self.assert_parser_error(build_file,
"Targets in root-level BUILD files must be named explicitly")
def test_addressable_exceptions(self):
self.add_to_build_file('b/BUILD', 'java_library(name="foo", "bad_arg")')
build_file_b = self.create_buildfile('b/BUILD')
try:
# Python 3.5+ message
self.assert_parser_error(build_file_b, 'positional argument follows keyword argument')
except AssertionError:
# Python 2.7-3.4 message
self.assert_parser_error(build_file_b, 'non-keyword arg after keyword arg')
self.add_to_build_file('d/BUILD', dedent(
"""
java_library(
name="foo",
dependencies=[
object(),
]
)
"""
))
build_file_d = self.create_buildfile('d/BUILD')
self.assert_parser_error(build_file_d,
'dependencies passed to Target constructors must be strings')
def test_noop_parse(self):
self.add_to_build_file('BUILD', '')
build_file = self.create_buildfile('BUILD')
address_map = set(self.build_file_parser.parse_build_file(build_file))
self.assertEqual(len(address_map), 0)
def test_invalid_unicode_in_build_file(self):
"""Demonstrate that unicode characters causing parse errors raise real parse errors."""
self.add_to_build_file('BUILD', dedent(
"""
jvm_binary(name = ‘hello’, # Parse error due to smart quotes (non ascii characters)
source = 'HelloWorld.java'
main = 'foo.HelloWorld',
)
"""
))
build_file = self.create_buildfile('BUILD')
self.assert_parser_error(build_file, 'invalid character' if PY3 else 'invalid syntax')
def test_unicode_string_in_build_file(self):
"""Demonstrates that a string containing unicode should work in a BUILD file."""
self.add_to_build_file('BUILD', dedent(
"""
java_library(
name='foo',
sources=['א.java']
)
"""
))
build_file = self.create_buildfile('BUILD')
self.build_file_parser.parse_build_file(build_file)
class BuildFileParserTargetTest(BaseTestWithParser):
@property
def alias_groups(self):
return BuildFileAliases(targets={'fake': ErrorTarget})
def create_buildfile(self, path):
return BuildFile(FileSystemProjectTree(self.build_root), path)
def test_trivial_target(self):
self.add_to_build_file('BUILD', 'fake(name="foozle")')
build_file = self.create_buildfile('BUILD')
address_map = self.build_file_parser.parse_build_file(build_file)
self.assertEqual(len(address_map), 1)
address, proxy = address_map.popitem()
self.assertEqual(address, BuildFileAddress(build_file=build_file, target_name='foozle'))
self.assertEqual(proxy.addressed_name, 'foozle')
self.assertEqual(proxy.addressed_type, ErrorTarget)
def test_sibling_build_files(self):
self.add_to_build_file('BUILD', dedent(
"""
fake(name="base",
dependencies=[
':foo',
])
"""))
self.add_to_build_file('BUILD.foo', dedent(
"""
fake(name="foo",
dependencies=[
':bat',
])
"""))
self.add_to_build_file('./BUILD.bar', dedent(
"""
fake(name="bat")
"""))
bar_build_file = self.create_buildfile('BUILD.bar')
base_build_file = self.create_buildfile('BUILD')
foo_build_file = self.create_buildfile('BUILD.foo')
address_map = self.build_file_parser.address_map_from_build_files(
BuildFile.get_build_files_family(FileSystemProjectTree(self.build_root), "."))
addresses = address_map.keys()
self.assertEqual({bar_build_file.relpath, base_build_file.relpath, foo_build_file.relpath},
{address.rel_path for address in addresses})
self.assertEqual({'//:base', '//:foo', '//:bat'},
{address.spec for address in addresses})
def test_build_file_duplicates(self):
# This workspace has two targets in the same file with the same name.
self.add_to_build_file('BUILD', 'fake(name="foo")\n')
self.add_to_build_file('BUILD', 'fake(name="foo")\n')
with self.assertRaises(BuildFileParser.AddressableConflictException):
base_build_file = self.create_buildfile('BUILD')
self.build_file_parser.parse_build_file(base_build_file)
def test_sibling_build_files_duplicates(self):
# This workspace is malformed, you can't shadow a name in a sibling BUILD file
self.add_to_build_file('BUILD', dedent(
"""
fake(name="base",
dependencies=[
':foo',
])
"""))
self.add_to_build_file('BUILD.foo', dedent(
"""
fake(name="foo",
dependencies=[
':bat',
])
"""))
self.add_to_build_file('./BUILD.bar', dedent(
"""
fake(name="base")
"""))
with self.assertRaises(BuildFileParser.SiblingConflictException):
self.build_file_parser.address_map_from_build_files(
BuildFile.get_build_files_family(FileSystemProjectTree(self.build_root), '.'))
class BuildFileParserExposedObjectTest(BaseTestWithParser):
@property
def alias_groups(self):
return BuildFileAliases(objects={'fake_object': object()})
def test_exposed_object(self):
self.add_to_build_file('BUILD', """fake_object""")
build_file = BuildFile(FileSystemProjectTree(self.build_root), 'BUILD')
address_map = self.build_file_parser.parse_build_file(build_file)
self.assertEqual(len(address_map), 0)
class BuildFileParserExposedContextAwareObjectFactoryTest(BaseTestWithParser):
Jar = namedtuple('Jar', ['org', 'name', 'rev'])
Repository = namedtuple('Repository', ['name', 'url', 'push_db_basedir'])
Artifact = namedtuple('Artifact', ['org', 'name', 'repo'])
class JarLibrary(Target):
def __init__(self, jars=None, **kwargs):
super(BuildFileParserExposedContextAwareObjectFactoryTest.JarLibrary, self).__init__(**kwargs)
self.jars = jars or []
class JvmLibrary(Target):
def __init__(self, provides=None, **kwargs):
super(BuildFileParserExposedContextAwareObjectFactoryTest.JvmLibrary, self).__init__(**kwargs)
self.provides = provides
class JavaLibrary(JvmLibrary):
pass
class ScalaLibrary(JvmLibrary):
pass
@classmethod
def make_lib(cls, parse_context):
def real_make_lib(org, name, rev):
dep = parse_context.create_object('jar', org=org, name=name, rev=rev)
parse_context.create_object('jar_library', name=name, jars=[dep])
return real_make_lib
@classmethod
def create_java_libraries(cls, parse_context):
def real_create_java_libraries(base_name,
org='com.twitter',
provides_java_name=None,
provides_scala_name=None):
def provides_artifact(provides_name):
if provides_name is None:
return None
jvm_repo = cls.Repository(
name='maven-central',
url='http://maven.example.com',
push_db_basedir=os.path.join('build-support', 'ivy', 'pushdb'),
)
return parse_context.create_object('artifact',
org=org,
name=provides_name,
repo=jvm_repo)
parse_context.create_object('java_library',
name='{}-java'.format(base_name),
provides=provides_artifact(provides_java_name))
parse_context.create_object('scala_library',
name='{}-scala'.format(base_name),
provides=provides_artifact(provides_scala_name))
return real_create_java_libraries
def setUp(self):
super(BuildFileParserExposedContextAwareObjectFactoryTest, self).setUp()
self._paths = set()
def path_relative_util(self, parse_context):
def real_path_relative_util(path):
self._paths.add(os.path.join(parse_context.rel_path, path))
return real_path_relative_util
@property
def alias_groups(self):
return BuildFileAliases(
targets={
'jar_library': self.JarLibrary,
'java_library': self.JavaLibrary,
'scala_library': self.ScalaLibrary,
},
context_aware_object_factories={
'make_lib': self.make_lib,
'create_java_libraries': self.create_java_libraries,
'path_util': self.path_relative_util,
},
objects={
'artifact': self.Artifact,
'jar': self.Jar,
}
)
def test_context_aware_object_factories(self):
contents = dedent("""
create_java_libraries(base_name="create-java-libraries",
provides_java_name="test-java",
provides_scala_name="test-scala")
make_lib("com.foo.test", "does_not_exists", "1.0")
path_util("baz")
""")
self.create_file('3rdparty/BUILD', contents)
build_file = BuildFile(FileSystemProjectTree(self.build_root), '3rdparty/BUILD')
address_map = self.build_file_parser.parse_build_file(build_file)
registered_proxies = set(address_map.values())
self.assertEqual(len(registered_proxies), 3)
targets_created = {}
for target_proxy in registered_proxies:
targets_created[target_proxy.addressed_name] = target_proxy.addressed_type
self.assertEqual({'does_not_exists',
'create-java-libraries-scala',
'create-java-libraries-java'},
set(targets_created.keys()))
self.assertEqual(targets_created['does_not_exists'], self.JarLibrary)
self.assertEqual(targets_created['create-java-libraries-java'], self.JavaLibrary)
self.assertEqual(targets_created['create-java-libraries-scala'], self.ScalaLibrary)
self.assertEqual({'3rdparty/baz'}, self._paths)
def test_raises_parse_error(self):
self.add_to_build_file('BUILD', 'foo(name = = "baz")')
build_file = BuildFile(FileSystemProjectTree(self.build_root), 'BUILD')
with self.assertRaises(BuildFileParser.ParseError):
self.build_file_parser.parse_build_file(build_file)
# Test some corner cases for the context printing
# Error at beginning of BUILD file
build_file = self.add_to_build_file('begin/BUILD', dedent("""
*?&INVALID! = 'foo'
target(
name='bar',
dependencies= [
':baz',
],
)
"""))
with self.assertRaises(BuildFileParser.ParseError):
self.build_file_parser.parse_build_file(build_file)
# Error at end of BUILD file
build_file = self.add_to_build_file('end/BUILD', dedent("""
target(
name='bar',
dependencies= [
':baz',
],
)
*?&INVALID! = 'foo'
"""))
with self.assertRaises(BuildFileParser.ParseError):
self.build_file_parser.parse_build_file(build_file)
# Error in the middle of BUILD file > 6 lines
build_file = self.add_to_build_file('middle/BUILD', dedent("""
target(
name='bar',
*?&INVALID! = 'foo'
dependencies = [
':baz',
],
)
"""))
with self.assertRaises(BuildFileParser.ParseError):
self.build_file_parser.parse_build_file(build_file)
# Error in very short build file.
build_file = self.add_to_build_file('short/BUILD', dedent("""
target(name='bar', dependencies = [':baz'],) *?&INVALID! = 'foo'
"""))
with self.assertRaises(BuildFileParser.ParseError):
self.build_file_parser.parse_build_file(build_file)
def test_raises_execute_error(self):
self.add_to_build_file('BUILD', 'undefined_alias(name="baz")')
build_file = BuildFile(FileSystemProjectTree(self.build_root), 'BUILD')
with self.assertRaises(BuildFileParser.ExecuteError):
self.build_file_parser.parse_build_file(build_file)
def test_build_file_parser_error_hierarcy(self):
"""Exception handling code depends on the fact that all explicit exceptions from BuildFileParser
are subclassed from the BuildFileParserError base class.
"""
def assert_build_file_parser_error(e):
self.assertIsInstance(e, BuildFileParser.BuildFileParserError)
assert_build_file_parser_error(BuildFileParser.BuildFileScanError())
assert_build_file_parser_error(BuildFileParser.AddressableConflictException())
assert_build_file_parser_error(BuildFileParser.SiblingConflictException())
assert_build_file_parser_error(BuildFileParser.ParseError())
assert_build_file_parser_error(BuildFileParser.ExecuteError())