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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 glob
import json
import os
import morphlib
from morphlib.bins import call_in_artifact_directory
from morphlib.extractedtarball import ExtractedTarball
from morphlib.mountableimage import MountableImage
class NotASystemArtifactError(cliapp.AppException):
def __init__(self, artifact):
cliapp.AppException.__init__(
self, '%s is not a system artifact' % artifact)
class ManifestGenerator(object):
def __init__(self, app):
self.app = app
def generate(self, artifact, dirname):
# Try to find a directory with baserock metadata files.
metadirs = [
os.path.join(dirname, 'factory', 'baserock'),
os.path.join(dirname, 'baserock')
]
existing_metadirs = [x for x in metadirs if os.path.isdir(x)]
if not existing_metadirs:
raise NotASystemArtifactError(artifact)
metadir = existing_metadirs[0]
# Collect all meta information about the system, its strata
# and its chunks that we are interested in.
artifacts = []
for basename in glob.glob(os.path.join(metadir, '*.meta')):
metafile = os.path.join(metadir, basename)
metadata = json.load(open(metafile))
artifacts.append({
'cache-key': metadata['cache-key'],
'name': metadata['artifact-name'],
'kind': metadata['kind'],
'sha1': metadata['sha1'],
'original_ref': metadata['original_ref'],
'repo': metadata['repo'],
'morphology': metadata['morphology']
})
# Generate a format string for dumping the information.
fmt = self._generate_output_format(artifacts)
# Print information about system, strata and chunks.
self._print_artifacts(fmt, artifacts, 'system')
self._print_artifacts(fmt, artifacts, 'stratum')
self._print_artifacts(fmt, artifacts, 'chunk')
def _generate_output_format(self, artifacts):
colwidths = {}
for artifact in artifacts:
for key, value in artifact.iteritems():
colwidths[key] = max(colwidths.get(key, 0), len(value))
colwidths['first'] = sum([colwidths['cache-key'],
colwidths['kind'],
colwidths['name']]) + 1
return 'artifact=%%-%is\t' \
'version=%%-%is\t' \
'commit=%%-%is\t' \
'repository=%%-%is\t' \
'ref=%%-%is\t' \
'morphology=%%-%is\n' % (
len('artifact=') + colwidths['first'],
len('version=') + colwidths['version'],
len('commit=') + colwidths['sha1'],
len('repository=') + colwidths['repo'],
len('ref=') + colwidths['original_ref'],
len('morphology=') + colwidths['morphology'])
def _print_artifacts(self, fmt, artifacts, kind):
for artifact in sorted(artifacts, key=lambda x: x['name']):
if artifact['kind'] == kind:
self.app.output.write(fmt % (
'%s.%s.%s' % (artifact['cache-key'],
artifact['kind'],
artifact['name']),
artifact['version'],
artifact['sha1'],
artifact['repo'],
artifact['original_ref'],
artifact['morphology']))
class ArtifactInspectionPlugin(cliapp.Plugin):
def enable(self):
self.app.add_subcommand('run-in-artifact',
self.run_in_artifact,
arg_synopsis='ARTIFACT CMD')
self.app.add_subcommand('generate-manifest',
self.generate_manifest,
arg_synopsis='ROOTFS_ARTIFACT')
def disable(self):
pass
def run_in_artifact(self, args):
'''Run a command inside an extracted/mounted chunk or system.'''
if len(args) < 2:
raise cliapp.AppException(
'run-in-artifact requires arguments: a chunk or '
'system artifact and a a shell command')
artifact, cmd = args[0], args[1:]
def run_command_in_dir(dirname):
output = self.app.runcmd(cmd, cwd=dirname)
self.app.output.write(output)
call_in_artifact_directory(self.app, artifact, run_command_in_dir)
def generate_manifest(self, args):
'''Generate a content manifest for a system image.'''
if len(args) != 1:
raise cliapp.AppException('morph generate-manifest expects '
'a system image as its input')
artifact = args[0]
def generate_manifest(dirname):
generator = ManifestGenerator(self.app)
generator.generate(artifact, dirname)
call_in_artifact_directory(self.app, artifact, generate_manifest)
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