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Merge remote-tracking branch 'origin/path_hash_prefix' into path_hash_prefix

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dachshund 2013-08-10 20:07:45 -04:00
commit 113cff4791
1 changed files with 38 additions and 40 deletions
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78
tuf/client/updater.py
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@ -824,56 +824,54 @@ def _update_metadata_if_changed(self, metadata_role, referenced_metadata='releas
metadata_filename = metadata_role + '.txt'
# Need to ensure the referenced metadata has been loaded.
# The 'root' role may be updated without having 'release'
# available.
# Ensure the referenced metadata has been loaded. The 'root' role may be
# updated without having 'release' available.
if referenced_metadata not in self.metadata['current']:
message = 'Cannot update '+repr(metadata_role)+' because ' \
+referenced_metadata+' is missing.'
message = 'Cannot update '+repr(metadata_role)+' because '+\
repr(referenced_metadata)+' is missing.'
raise tuf.RepositoryError(message)
# The referenced metadata has been loaded. Extract the new
# fileinfo for 'metadata_role' from it.
else:
new_fileinfo = self.metadata['current'][referenced_metadata] \
['meta'][metadata_filename]
message = repr(metadata_role)+' referenced in '+\
repr(referenced_metadata)+'. '+repr(metadata_role)+' may be updated.'
logger.debug(message)
# There might be a compressed version of 'release.txt' or Targets
# metadata available for download. Check the 'meta' field of
# 'referenced_metadata' to see if it is listed when 'metadata_role'
# is 'release'. The full rolename for delegated Targets metadata
# must begin with 'targets/'. The Release role lists all the Targets
# metadata available on the repository, including any that may be in
# compressed form.
compression = None
gzip_metadata_filename = metadata_filename + '.gz'
# Extract the new fileinfo of the uncompressed version of 'metadata_role'.
new_fileinfo = self.metadata['current'][referenced_metadata] \
['meta'][metadata_filename]
# Check for availability of compressed versions of 'release.txt',
# 'targets.txt', and delegated Targets, which also start with 'targets'.
# For 'targets.txt' and delegated metadata, 'referenced_metata'
# should always be 'release'. 'release.txt' specifies all roles
# provided by a repository, including their file sizes and hashes.
if metadata_role == 'release' or metadata_role.startswith('targets'):
if gzip_metadata_filename in self.metadata['current'] \
[referenced_metadata]['meta']:
compression = 'gzip'
new_fileinfo = self.metadata['current'][referenced_metadata] \
['meta'][gzip_metadata_filename]
else:
message = 'Compressed version of '+repr(metadata_filename)+\
' not available.'
logger.debug(message)
# Simply return if the fileinfo has not changed according to the
# Simply return if the fileinfo has not changed, according to the
# fileinfo provided by the referenced metadata.
if not self._fileinfo_has_changed(metadata_filename, new_fileinfo):
return
logger.info('Metadata '+repr(metadata_filename)+' has changed.')
# There might be a compressed version of 'release.txt' or Targets
# metadata available for download. Check the 'meta' field of
# 'referenced_metadata' to see if it is listed when 'metadata_role'
# is 'release'. Check the 'meta' field of 'release' when 'metadata_role'
# is Targets metadata. The full rolename for delegated Targets metadata
# must begin with 'targets/'. The Release role lists all the Targets
# metadata available on the repository, including any that may be in
# compressed form.
compression = None
gzip_path = metadata_filename + '.gz'
if metadata_role == 'release':
if gzip_path in self.metadata['current'][referenced_metadata]['meta']:
compression = 'gzip'
new_fileinfo = self.metadata['current'][referenced_metadata] \
['meta'][gzip_path]
# Check for available compressed versions of 'targets.txt' and delegated
# Targets, which also start with 'targets'.
elif metadata_role.startswith('targets'):
# For 'targets.txt' and delegated metadata, 'referenced_metata'
# should always be 'release'. 'release.txt' specifies all roles
# provided by a repository, including their file sizes and hashes.
if gzip_path in self.metadata['current'][referenced_metadata]['meta']:
compression = 'gzip'
new_fileinfo = self.metadata['current'][referenced_metadata] \
['meta'][gzip_path]
else:
message = 'Compressed version of '+repr(metadata_filename)+' not available.'
logger.debug(message)
try:
self._update_metadata(metadata_role, fileinfo=new_fileinfo,
compression=compression)