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# Copyright (C) 2012-2013 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import morphlib
import cliapp
class MorphologyFactoryError(cliapp.AppException):
pass
class AutodetectError(MorphologyFactoryError):
def __init__(self, repo_name, ref, filename):
MorphologyFactoryError.__init__(
self, "Failed to determine the build system of repo %s at "
"ref %s: was looking for %s" % (repo_name, ref, filename))
class NotcachedError(MorphologyFactoryError):
def __init__(self, repo_name):
MorphologyFactoryError.__init__(
self, "Repository %s is not cached locally and there is no "
"remote cache specified" % repo_name)
class MorphologyFactory(object):
'''An way of creating morphologies which will provide a default'''
def __init__(self, local_repo_cache, remote_repo_cache=None, app=None):
self._lrc = local_repo_cache
self._rrc = remote_repo_cache
self._app = app
def status(self, *args, **kwargs): # pragma: no cover
if self._app is not None:
self._app.status(*args, **kwargs)
def get_morphology(self, reponame, sha1, filename):
text = None
if self._lrc.has_repo(reponame):
repo = self._lrc.get_repo(reponame)
file_list = repo.ls_tree(sha1)
if filename in file_list:
text = repo.cat(sha1, filename)
elif self._rrc is not None:
file_list = self._rrc.ls_tree(reponame, sha1)
if filename in file_list:
self.status(msg="Retrieving %(reponame)s %(sha1)s %(filename)s"
" from the remote artifact cache.",
reponame=reponame, sha1=sha1, filename=filename,
chatty=True)
text = self._rrc.cat_file(reponame, sha1, filename)
else:
raise NotcachedError(reponame)
if text is None:
bs = morphlib.buildsystem.detect_build_system(file_list)
if bs is None:
raise AutodetectError(reponame, sha1, filename)
# TODO consider changing how morphs are located to be by morph
# name rather than filename, it would save creating a
# filename only to strip it back to its morph name again
# and would allow future changes like morphologies being
# stored as git metadata instead of as a file in the repo
morph_name = filename[:-len('.morph')]
text = bs.get_morphology_text(morph_name)
try:
morphology = morphlib.morph2.Morphology(text)
except morphlib.YAMLError as e: # pragma: no cover
raise morphlib.Error("Error parsing %s: %s" %
(filename, str(e)))
if filename != morphology['name'] + '.morph':
raise morphlib.Error(
"Name %s does not match basename of morphology file %s" %
(morphology['name'], filename))
method_name = '_check_and_tweak_%s' % morphology['kind']
if hasattr(self, method_name):
method = getattr(self, method_name)
method(morphology, reponame, sha1, filename)
return morphology
def _check_and_tweak_system(self, morphology, reponame, sha1, filename):
'''Check and tweak a system morphology.'''
if morphology['arch'] is None: # pragma: no cover
raise morphlib.Error('No arch specified in system %s '
'(arch is a mandatory field)' %
filename)
if not morphology['system-kind']:
raise morphlib.Error('No system-kind defined in system %s '
'(it is a mandatory field)' % filename)
name = morphology['name']
morphology.builds_artifacts = [name + '-rootfs']
morphology.needs_staging_area = False
morphology.needs_artifact_metadata_cached = False
def _check_and_tweak_stratum(self, morphology, reponame, sha1, filename):
'''Check and tweak a stratum morphology.'''
for source in morphology['chunks']: # pragma: no cover
if source.get('build-depends', None) is None:
name = source.get('name', source.get('repo', 'unknown'))
raise morphlib.Error('No build dependencies '
'stratum %s for chunk %s '
'(build-depends is a mandatory '
'field)' %
(filename, name))
morphology.builds_artifacts = [morphology['name']]
morphology.needs_staging_area = False
morphology.needs_artifact_metadata_cached = True
def _check_and_tweak_chunk(self, morphology, reponame, sha1, filename):
'''Check and tweak a chunk morphology.'''
if 'chunks' in morphology and len(morphology['chunks']) > 1:
morphology.builds_artifacts = morphology['chunks'].keys()
else:
morphology.builds_artifacts = [morphology['name']]
morphology.needs_staging_area = True
morphology.needs_artifact_metadata_cached = False
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