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#!/usr/bin/python
# Copyright (C) 2010, 2011 Lars Wirzenius
#
# 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 3 of the License, or
# (at your option) any later version.
#
# 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/>.
import csv
import json
import os
import cliapp
import summainlib
class OutputFormat(object):
keys = ['Mtime', 'Mode', 'Ino', 'Dev', 'Nlink', 'Size',
'Uid', 'Username', 'Gid', 'Group', 'Target', 'Xattrs']
def __init__(self, output, checksums, objects):
self.output = output
self.checksums = checksums
self.objects = objects
def write(self):
for name, o in self.objects:
self.write_object(name, o)
def write_object(self, name, o):
raise NotImplementedError()
class Rfc822(OutputFormat):
def write_object(self, name, o):
keys = self.keys + self.checksums
values = [('Name', name)]
values += [(k, o[k]) for k in keys if o[k] != '']
record = ''.join('%s: %s\n' % (k, v) for k, v in values if v != '')
self.output.write('%s\n' % record)
class CSV(OutputFormat):
def __init__(self, output, checksums, objects):
OutputFormat.__init__(self, output, checksums, objects)
self.writer = csv.writer(output)
self.wrote_headings = False
def write_object(self, name, o):
keys = self.keys + self.checksums
if not self.wrote_headings:
self.writer.writerow(['Name'] + keys)
self.wrote_headings = True
values = [name] + [o[k] or '' for k in keys]
self.writer.writerow(values)
class GeneratorList(list):
def __init__(self, gen):
list.__init__(self)
self.gen = gen
def __len__(self):
return 1
def __iter__(self):
return iter(self.gen)
class Json(OutputFormat):
def write(self):
gen = GeneratorList(self.dictify(name, o) for name, o in self.objects)
json.dump(gen, self.output, sort_keys=True, indent=1)
self.output.write('\n')
def write_object(self, name, o):
pass
def dictify(self, name, o):
keys = self.keys + self.checksums
values = {'Name': name}
for k in keys:
if o[k] != '':
values[k] = o[k]
return values
class Summain(cliapp.Application):
def add_settings(self):
self.settings.boolean(
['relative-paths', 'r'],
'print paths relative to arguments')
self.settings.boolean(
['mangle-paths', 'm'],
'mangle (obfuscate) paths')
self.settings.string(
['secret'],
'use SECRET to make mangled paths unguessable')
self.settings.string_list(
['exclude'],
'do not output or compute FIELD',
metavar='FIELD')
self.settings.string_list(
['checksum', 'c'],
'which checksums to compute: '
'MD5, SHA1, SHA224, SHA256, SHA384, SHA512; '
'use once per checksum type (default is SHA256)')
self.settings.choice(
['output-format', 'f'],
['rfc822', 'csv', 'json'],
'choose output format (rfc822, csv, json)')
def files(self, root):
if os.path.isdir(root) and not os.path.islink(root):
for dirname, dirnames, filenames in os.walk(root):
yield dirname
dirnames.sort()
for filename in sorted(filenames):
yield os.path.join(dirname, filename)
elif os.path.islink(root):
yield root
elif not os.path.exists(root):
raise cliapp.AppException('Does not exist: %s' % root)
else:
yield root
def process_args(self, args):
checksums = [x.upper()
for x in self.settings['checksum'] or ['SHA256']]
fmt = self.new_formatter(checksums, self.find_roots(args))
fmt.write()
def find_roots(self, roots):
relative = self.settings['relative-paths']
exclude = self.settings['exclude']
nn = summainlib.NumberNormalizer()
if self.settings['mangle-paths']:
pn = summainlib.PathNormalizer(self.settings['secret'])
else:
pn = summainlib.SamePath()
for root in roots:
for filename in self.files(root):
o = summainlib.FilesystemObject(filename, nn, pn, exclude)
if relative:
o.relative = self.relative_path(root, o)
yield o['Name'], o
def relative_path(self, root, o):
'''Return a path that is relative to root, if possible.
If pathname does not start with root, then return it
unmodified.
'''
if root.endswith(os.sep):
root2 = root
else:
root2 = root + os.sep
if o.filename.startswith(root2):
return o.filename[len(root2):]
elif o.filename == root and o.isdir():
return '.'
else:
return o.filename
def new_formatter(self, checksums, objects):
table = {
'rfc822': Rfc822,
'csv': CSV,
'json': Json,
}
formatter = table[self.settings['output-format']]
return formatter(self.output, checksums, objects)
Summain(version=summainlib.__version__).run()
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