def test_control_field_parsing(self):
"""Test the parsing of control file fields."""
deb822_package = Deb822([
'Package: python-py2deb',
'Depends: python-deb-pkg-tools, python-pip, python-pip-accel',
'Installed-Size: 42'
])
parsed_info = parse_control_fields(deb822_package)
assert parsed_info == {
'Package':
'python-py2deb',
'Depends':
RelationshipSet(Relationship(name=u'python-deb-pkg-tools'),
Relationship(name=u'python-pip'),
Relationship(name=u'python-pip-accel')),
'Installed-Size':
42
}
# Test backwards compatibility with the old interface where `Depends'
# like fields were represented as a list of strings (shallow parsed).
parsed_info['Depends'] = [text_type(r) for r in parsed_info['Depends']]
assert unparse_control_fields(parsed_info) == deb822_package
# Test compatibility with fields like `Depends' containing a string.
parsed_info['Depends'] = deb822_package['Depends']
assert unparse_control_fields(parsed_info) == deb822_package
def test_control_field_parsing(self):
deb822_package = Deb822([
'Package: python-py2deb',
'Depends: python-deb-pkg-tools, python-pip, python-pip-accel',
'Installed-Size: 42'
])
parsed_info = parse_control_fields(deb822_package)
self.assertEqual(
parsed_info, {
'Package':
'python-py2deb',
'Depends':
RelationshipSet(Relationship(name=u'python-deb-pkg-tools'),
Relationship(name=u'python-pip'),
Relationship(name=u'python-pip-accel')),
'Installed-Size':
42
})
# Test backwards compatibility with the old interface where `Depends'
# like fields were represented as a list of strings (shallow parsed).
parsed_info['Depends'] = [unicode(r) for r in parsed_info['Depends']]
self.assertEqual(unparse_control_fields(parsed_info), deb822_package)
# Test compatibility with fields like `Depends' containing a string.
parsed_info['Depends'] = deb822_package['Depends']
self.assertEqual(unparse_control_fields(parsed_info), deb822_package)
def test_relationship_parsing(self):
"""Test the parsing of Debian package relationship declarations."""
# Happy path (no parsing errors).
relationship_set = parse_depends('foo, bar (>= 1) | baz')
assert relationship_set.relationships[0].name == 'foo'
assert relationship_set.relationships[1].relationships[0].name == 'bar'
assert relationship_set.relationships[1].relationships[0].operator == '>='
assert relationship_set.relationships[1].relationships[0].version == '1'
assert relationship_set.relationships[1].relationships[1].name == 'baz'
assert parse_depends('foo (=1.0)') == RelationshipSet(VersionedRelationship(
name='foo',
operator='=',
version='1.0',
))
# Unhappy path (parsing errors).
self.assertRaises(ValueError, parse_depends, 'foo (bar) (baz)')
self.assertRaises(ValueError, parse_depends, 'foo (bar baz qux)')
def test_relationship_parsing(self):
# Happy path (no parsing errors).
relationship_set = parse_depends('foo, bar (>= 1) | baz')
self.assertEqual(relationship_set.relationships[0].name, 'foo')
self.assertEqual(
relationship_set.relationships[1].relationships[0].name, 'bar')
self.assertEqual(
relationship_set.relationships[1].relationships[0].operator, '>=')
self.assertEqual(
relationship_set.relationships[1].relationships[0].version, '1')
self.assertEqual(
relationship_set.relationships[1].relationships[1].name, 'baz')
self.assertEqual(
parse_depends('foo (=1.0)'),
RelationshipSet(
VersionedRelationship(name='foo', operator='=',
version='1.0')))
# Unhappy path (parsing errors).
self.assertRaises(ValueError, parse_depends, 'foo (bar) (baz)')
self.assertRaises(ValueError, parse_depends, 'foo (bar baz qux)')
def merge_control_fields(defaults, overrides):
"""
Merge the fields of two Debian control files.
:param defaults: A dictionary with existing control field name/value pairs.
:param overrides: A dictionary with fields that should override default
name/value pairs. Values of the fields `Depends`,
`Provides`, `Replaces` and `Conflicts` are merged
while values of other fields are overwritten.
:returns: A dictionary of the type :class:`.Deb822`.
"""
merged = Deb822()
defaults = parse_control_fields(defaults)
overrides = parse_control_fields(overrides)
logger.debug(
"Merging control files (%i default fields, %i override fields)",
len(defaults), len(overrides))
# Merge the field names while preserving their order.
field_names = list(defaults.keys())
for name in overrides.keys():
if name not in field_names:
field_names.append(name)
for name in field_names:
if name in DEPENDS_LIKE_FIELDS:
# Dependencies are merged instead of overridden.
relationships = set()
for source in [defaults, overrides]:
if name in source:
relationships.update(source[name].relationships)
merged[name] = RelationshipSet(*sorted(relationships))
elif name not in overrides:
merged[name] = defaults[name]
elif name not in defaults:
merged[name] = overrides[name]
else:
# Field present in both defaults and overrides;
# in this case the override takes precedence.
merged[name] = overrides[name]
logger.debug("Merged control fields: %s", merged)
return unparse_control_fields(merged)
def merge_control_fields(defaults, overrides):
"""
Merge the fields of two Debian control files.
:param defaults: A dictionary with existing control field name/value pairs
(may be an instance of :class:`debian.deb822.Deb822`
but doesn't have to be).
:param overrides: A dictionary with fields that should override default
name/value pairs. Values of the fields `Depends`,
`Provides`, `Replaces` and `Conflicts` are merged
while values of other fields are overwritten.
:returns: An instance of :class:`debian.deb822.Deb822` that contains the
merged control field name/value pairs.
"""
defaults = parse_control_fields(defaults)
overrides = parse_control_fields(overrides)
logger.debug(
"Merging control files (%i default fields, %i override fields)",
len(defaults), len(overrides))
merged = {}
for name in (set(defaults.keys()) | set(overrides.keys())):
if name in DEPENDS_LIKE_FIELDS:
# Dependencies are merged instead of overridden.
relationships = set()
for source in [defaults, overrides]:
if name in source:
relationships.update(source[name].relationships)
merged[name] = RelationshipSet(*sorted(relationships))
elif name not in overrides:
merged[name] = defaults[name]
elif name not in defaults:
merged[name] = overrides[name]
else:
# Field present in both defaults and overrides;
# in this case the override takes precedence.
merged[name] = overrides[name]
logger.debug("Merged control fields: %s", merged)
return unparse_control_fields(merged)