12 import arvados.commands._util as arv_cmd
14 from arvados._version import __version__
17 logger = logging.getLogger('arvados.arv-get')
19 parser = argparse.ArgumentParser(
20 description='Copy data from Keep to a local file or pipe.',
21 parents=[arv_cmd.retry_opt])
22 parser.add_argument('--version', action='version',
23 version="%s %s" % (sys.argv[0], __version__),
24 help='Print version and exit.')
25 parser.add_argument('locator', type=str,
27 Collection locator, optionally with a file path or prefix.
29 parser.add_argument('destination', type=str, nargs='?', default='-',
31 Local file or directory where the data is to be written. Default: stdout.
33 group = parser.add_mutually_exclusive_group()
34 group.add_argument('--progress', action='store_true',
36 Display human-readable progress on stderr (bytes and, if possible,
37 percentage of total data size). This is the default behavior when it
38 is not expected to interfere with the output: specifically, stderr is
39 a tty _and_ either stdout is not a tty, or output is being written to
40 named files rather than stdout.
42 group.add_argument('--no-progress', action='store_true',
44 Do not display human-readable progress on stderr.
46 group.add_argument('--batch-progress', action='store_true',
48 Display machine-readable progress on stderr (bytes and, if known,
51 group = parser.add_mutually_exclusive_group()
52 group.add_argument('--hash',
54 Display the hash of each file as it is read from Keep, using the given
55 hash algorithm. Supported algorithms include md5, sha1, sha224,
56 sha256, sha384, and sha512.
58 group.add_argument('--md5sum', action='store_const',
59 dest='hash', const='md5',
61 Display the MD5 hash of each file as it is read from Keep.
63 parser.add_argument('-n', action='store_true',
65 Do not write any data -- just read from Keep, and report md5sums if
68 parser.add_argument('-r', action='store_true',
70 Retrieve all files in the specified collection/prefix. This is the
71 default behavior if the "locator" argument ends with a forward slash.
73 group = parser.add_mutually_exclusive_group()
74 group.add_argument('-f', action='store_true',
76 Overwrite existing files while writing. The default behavior is to
77 refuse to write *anything* if any of the output files already
78 exist. As a special case, -f is not needed to write to stdout.
80 group.add_argument('--skip-existing', action='store_true',
82 Skip files that already exist. The default behavior is to refuse to
83 write *anything* if any files exist that would have to be
84 overwritten. This option causes even devices, sockets, and fifos to be
88 def parse_arguments(arguments, stdout, stderr):
89 args = parser.parse_args(arguments)
91 if args.locator[-1] == os.sep:
95 not (args.destination and
96 os.path.isdir(args.destination))):
97 parser.error('Destination is not a directory.')
98 if not args.r and (os.path.isdir(args.destination) or
99 args.destination[-1] == os.path.sep):
100 args.destination = os.path.join(args.destination,
101 os.path.basename(args.locator))
102 logger.debug("Appended source file name to destination directory: %s",
105 if args.destination == '/dev/stdout':
106 args.destination = "-"
108 if args.destination == '-':
109 # Normally you have to use -f to write to a file (or device) that
110 # already exists, but "-" and "/dev/stdout" are common enough to
111 # merit a special exception.
114 args.destination = args.destination.rstrip(os.sep)
116 # Turn on --progress by default if stderr is a tty and output is
117 # either going to a named file, or going (via stdout) to something
119 if (not (args.batch_progress or args.no_progress)
121 and (args.destination != '-'
122 or not stdout.isatty())):
126 def main(arguments=None, stdout=sys.stdout, stderr=sys.stderr):
129 args = parse_arguments(arguments, stdout, stderr)
130 if api_client is None:
131 api_client = arvados.api('v1')
133 r = re.search(r'^(.*?)(/.*)?$', args.locator)
134 collection = r.group(1)
135 get_prefix = r.group(2)
136 if args.r and not get_prefix:
138 reader = arvados.CollectionReader(collection, num_retries=args.retries)
142 open_flags = os.O_CREAT | os.O_WRONLY
144 open_flags |= os.O_EXCL
146 if args.destination == "-":
147 stdout.write(reader.manifest_text())
149 out_fd = os.open(args.destination, open_flags)
150 with os.fdopen(out_fd, 'wb') as out_file:
151 out_file.write(reader.manifest_text())
152 except (IOError, OSError) as error:
153 logger.error("can't write to '{}': {}".format(args.destination, error))
155 except (arvados.errors.ApiError, arvados.errors.KeepReadError) as error:
156 logger.error("failed to download '{}': {}".format(collection, error))
160 # Scan the collection. Make an array of (stream, file, local
161 # destination filename) tuples, and add up total size to extract.
165 for s, f in files_in_collection(reader):
166 if get_prefix and get_prefix[-1] == os.sep:
167 if 0 != string.find(os.path.join(s.stream_name(), f.name),
170 if args.destination == "-":
173 dest_path = os.path.join(
175 os.path.join(s.stream_name(), f.name)[len(get_prefix)+1:])
176 if (not (args.n or args.f or args.skip_existing) and
177 os.path.exists(dest_path)):
178 logger.error('Local file %s already exists.' % (dest_path,))
181 if os.path.join(s.stream_name(), f.name) != '.' + get_prefix:
183 dest_path = args.destination
184 todo += [(s, f, dest_path)]
185 todo_bytes += f.size()
186 except arvados.errors.NotFoundError as e:
191 for s, f, outfilename in todo:
195 if outfilename == "-":
198 if args.skip_existing and os.path.exists(outfilename):
199 logger.debug('Local file %s exists. Skipping.', outfilename)
201 elif not args.f and (os.path.isfile(outfilename) or
202 os.path.isdir(outfilename)):
203 # Good thing we looked again: apparently this file wasn't
204 # here yet when we checked earlier.
205 logger.error('Local file %s already exists.' % (outfilename,))
208 arvados.util.mkdir_dash_p(os.path.dirname(outfilename))
210 outfile = open(outfilename, 'wb')
211 except Exception as error:
212 logger.error('Open(%s) failed: %s' % (outfilename, error))
215 digestor = hashlib.new(args.hash)
217 with s.open(f.name, 'r') as file_reader:
218 for data in file_reader.readall():
222 digestor.update(data)
223 out_bytes += len(data)
225 stderr.write('\r%d MiB / %d MiB %.1f%%' %
230 else 100.0*out_bytes/todo_bytes)))
231 elif args.batch_progress:
232 stderr.write('%s %d read %d total\n' %
233 (sys.argv[0], os.getpid(),
234 out_bytes, todo_bytes))
236 stderr.write("%s %s/%s\n"
237 % (digestor.hexdigest(), s.stream_name(), f.name))
238 except KeyboardInterrupt:
239 if outfile and (outfile.fileno() > 2) and not outfile.closed:
240 os.unlink(outfile.name)
246 def files_in_collection(c):
247 # Sort first by file type, then alphabetically by file path.
248 for i in sorted(c.keys(),
250 isinstance(c[k], arvados.collection.Subcollection),
252 if isinstance(c[i], arvados.arvfile.ArvadosFile):
254 elif isinstance(c[i], arvados.collection.Subcollection):
255 for s, f in files_in_collection(c[i]):