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# Copyright (C) 2011 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; either 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 json
import logging
class SchemaError(Exception):
pass
class Morphology(object):
'''Represent a morphology: description of how to build binaries.'''
def __init__(self, fp, baseurl=None):
self._fp = fp
self._baseurl = baseurl or ''
self._load()
def _load(self):
logging.debug('Loading morphology %s' % self._fp.name)
self._dict = json.load(self._fp)
if 'name' not in self._dict:
raise self._error('must contain "name"')
if not self.name:
raise self._error('"name" must not be empty')
if 'kind' not in self._dict:
raise self._error('must contain "kind"')
if self.kind == 'chunk':
self._validate_chunk()
self.source['repo'] = self._join_with_baseurl(self.source['repo'])
elif self.kind == 'stratum':
self._validate_stratum()
for source in self.sources.itervalues():
source['repo'] = self._join_with_baseurl(source['repo'])
else:
raise self._error('kind must be chunk or stratum, not %s' %
self.kind)
self.filename = self._fp.name
def _validate_chunk(self):
valid_toplevel_keys = ['name', 'kind', 'source', 'configure-commands',
'build-commands', 'test-commands',
'install-commands']
if 'source' not in self._dict:
raise self._error('chunks must have "source" field')
if type(self.source) != dict:
raise self._error('"source" must be a dictionary')
if len(self.source) == 0:
raise self._error('"source" must not be empty')
if 'repo' not in self.source:
raise self._error('"source" must contain "repo"')
if not self.source['repo']:
raise self._error('"source" must contain non-empty "repo"')
if 'ref' not in self.source:
raise self._error('"source" must contain "ref"')
if not self.source['ref']:
raise self._error('"source" must contain non-empty "ref"')
for key in self.source.keys():
if key not in ('repo', 'ref'):
raise self._error('unknown key "%s" in "source"' % key)
cmdlists = [
(self.configure_commands, 'configure-commands'),
(self.build_commands, 'build-commands'),
(self.test_commands, 'test-commands'),
(self.install_commands, 'install-commands'),
]
for value, name in cmdlists:
if type(value) != list:
raise self._error('"%s" must be a list' % name)
for x in value:
if type(x) != unicode:
raise self._error('"%s" must contain strings' % name)
for key in self._dict.keys():
if key not in valid_toplevel_keys:
raise self._error('unknown key "%s"' % key)
def _validate_stratum(self):
valid_toplevel_keys = ['name', 'kind', 'sources']
if 'sources' not in self._dict:
raise self._error('stratum must contain "sources"')
if type(self.sources) != dict:
raise self._error('"sources" must be a dict')
if len(self.sources) == 0:
raise self._error('"sources" must not be empty')
for name, source in self.sources.iteritems():
if type(source) != dict:
raise self._error('"sources" must contain dicts')
if 'repo' not in source:
raise self._error('sources must have "repo"')
if type(source['repo']) != unicode:
raise self._error('"repo" must be a string')
if not source['repo']:
raise self._error('"repo" must be a non-empty string')
if 'ref' not in source:
raise self._error('sources must have "ref"')
if type(source['ref']) != unicode:
raise self._error('"ref" must be a string')
if not source['ref']:
raise self._error('"ref" must be a non-empty string')
for key in source:
if key not in ('repo', 'ref'):
raise self._error('unknown key "%s" in sources' % key)
for key in self._dict.keys():
if key not in valid_toplevel_keys:
raise self._error('unknown key "%s"' % key)
@property
def name(self):
return self._dict['name']
@property
def kind(self):
return self._dict['kind']
@property
def source(self):
return self._dict['source']
@property
def sources(self):
return self._dict['sources']
@property
def configure_commands(self):
return self._dict.get('configure-commands', [])
@property
def build_commands(self):
return self._dict.get('build-commands', [])
@property
def test_commands(self):
return self._dict.get('test-commands', [])
@property
def install_commands(self):
return self._dict.get('install-commands', [])
@property
def manifest(self):
if self.kind == 'chunk':
return [(self.source['repo'], self.source['ref'])]
else:
return [(source['repo'], source['ref'])
for source in self.sources.itervalues()]
def _join_with_baseurl(self, url):
is_relative = (':' not in url or
'/' not in url or
url.find('/') < url.find(':'))
if is_relative:
if not url.endswith('/'):
url += '/'
return self._baseurl + url
else:
return url
def _error(self, msg):
return SchemaError('Morphology %s: %s' % (self._fp.name, msg))
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