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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 cliapp
import os
import tempfile
import gzip
import morphlib
from morphlib.mountableimage import MountableImage
class TrebuchetPlugin(cliapp.Plugin):
def enable(self):
self.app.add_subcommand('make-patch',
self.make_patch,
arg_synopsis='PATH SRC_TRIPLE TGT_TRIPLE')
def disable(self):
pass
def make_patch(self, args):
'''Create a Trebuchet patch between two system images.'''
if len(args) != 7:
raise cliapp.AppException('make-patch requires arguments: '
'name of output file plus two triplets')
output = args[0]
repo_name1, ref1, filename1 = args[1:4]
repo_name2, ref2, filename2 = args[4:7]
app = self.app
build_env = morphlib.buildenvironment.BuildEnvironment(app.settings)
ckc = morphlib.cachekeycomputer.CacheKeyComputer(build_env)
lac, rac = morphlib.util.new_artifact_caches(app.settings)
lrc, rrc = morphlib.util.new_repo_caches(app)
def the_one(source, repo_name, ref, filename):
return (source.repo_name == repo_name and
source.original_ref == ref and
source.filename == filename)
def get_artifact(repo_name, ref, filename):
srcpool = app.create_source_pool(
lrc, rrc, (repo_name, ref, filename))
ar = morphlib.artifactresolver.ArtifactResolver()
artifacts = ar.resolve_artifacts(srcpool)
for artifact in artifacts:
artifact.cache_key = ckc.compute_key(artifact)
if the_one(artifact.source, repo_name, ref, filename):
a = morphlib.artifact.Artifact(
artifact.source,
artifact.source.morphology['name'] + '-rootfs')
a.cache_key = artifact.cache_key
return a
artifact1 = get_artifact(repo_name1, ref1, filename1)
artifact2 = get_artifact(repo_name2, ref2, filename2)
image_path_1 = lac.get(artifact1).name
image_path_2 = lac.get(artifact2).name
mount_point_1 = None
mount_point_2 = None
with MountableImage(app, image_path_1) as mount_point_1:
with MountableImage(app, image_path_2) as mount_point_2:
app.runcmd(['tbdiff-create', output,
os.path.join(mount_point_1, 'factory'),
os.path.join(mount_point_2, 'factory')])
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