Source code for rosdistro.source_repository_cache
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[docs]class SourceRepositoryCache(object):
"""
This class represents a cache of the package XML strings for all packages in a single
repo at a particular moment in time. A dictionary of many of these (one for each repo)
keyed to the repo name represents the totality of the source package xml cache.
"""
def __init__(self, data):
assert data
self._ref = data['_ref']
self._package_names = set([name for name in data.keys() if name != '_ref'])
self._data = data
[docs] def get_data(self):
"""
Return the bare data dict, suitable for serializing into yaml.
"""
return self._data
[docs] @classmethod
def from_ref(cls, ref):
"""
Create a new empty cache instance from just the version control reference hash.
"""
return cls({'_ref': ref})
[docs] def add(self, package_name, package_path, package_xml_string):
"""
Add a package to the cache.
"""
self._data[package_name] = (package_path, package_xml_string)
self._package_names.add(package_name)
def __iter__(self):
"""
Iterate the list of package names in this cached repo. Returns an iterator of str.
"""
return iter(self._package_names)
def __getitem__(self, package_name):
"""
Access the cached information about a specific package. Returns a (str, str) of
path to package relative to repo root, and string of package xml.
"""
if package_name not in self._package_names:
raise KeyError("Package '%s' not present in SourceRepositoryCache." % package_name)
return self._data[package_name]
[docs] def items(self):
"""
Generator of (str, str, str) containing the package name, path relative
to repo root, and package xml string.
"""
for package_name in self._package_names:
package_path, package_xml_string = self._data[package_name]
yield package_name, package_path, package_xml_string
def __len__(self):
"""
Returns the number of packages in this repo.
"""
return len(self._package_names)
[docs] def keys(self):
"""
Return the list of packages in the repo cache.
"""
return self._package_names
[docs] def ref(self):
"""
Return the version control hash.
"""
return self._ref