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#!/usr/bin/env python
# Copyright (C) 2015 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, see <http://www.gnu.org/licenses/>.
'''Migration to Baserock Definitions format version 1.
In version 1, the 'build-depends' parameter was made optional. It was
previously mandatory to specify 'build-depends' for a chunk, even if it was an
empty list.
'''
import sys
import warnings
import migrations
TO_VERSION = 1
def check_empty_build_depends(contents, filename):
assert contents['kind'] == 'stratum'
valid = True
for chunk_ref in contents.get('chunks', []):
if 'build-depends' not in chunk_ref:
chunk_ref_name = chunk_ref.get('name', chunk_ref.get('morph'))
warnings.warn(
"%s:%s has no build-depends field, which "
"is invalid in definitions version 0." %
(contents['name'], chunk_ref_name))
valid = False
return valid
def remove_empty_build_depends(contents, filename):
assert contents['kind'] == 'stratum'
changed = False
for chunk_ref in contents.get('chunks', []):
if 'build-depends' in chunk_ref:
if len(chunk_ref['build-depends']) == 0:
del chunk_ref['build-depends']
changed = True
return changed
try:
if migrations.check_definitions_version(TO_VERSION - 1):
success = migrations.process_definitions(
path='.', kinds=['stratum'],
validate_cb=check_empty_build_depends,
modify_cb=remove_empty_build_depends)
if success:
migrations.set_definitions_version(TO_VERSION)
sys.stdout.write("Migration completed successfully.\n")
sys.exit(0)
else:
sys.stderr.write("Migration failed due to warnings.\n")
sys.exit(1)
else:
sys.stdout.write("Nothing to do.\n")
sys.exit(0)
except RuntimeError as e:
sys.stderr.write("Error: %s\n" % e.message)
sys.exit(1)
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