3 from bup import hashsplit, git, options, client
4 from bup.helpers import *
8 bup split [-tcb] [-n name] [--bench] [filenames...]
10 r,remote= remote repository path
11 b,blobs output a series of blob ids
12 t,tree output a tree id
13 c,commit output a commit id
14 n,name= name of backup set to update (if any)
15 d,date= date for the commit (seconds since the epoch)
16 q,quiet don't print progress messages
17 v,verbose increase log output (can be used more than once)
18 git-ids read a list of git object ids from stdin and split their contents
19 keep-boundaries don't let one chunk span two input files
20 noop don't actually save the data anywhere
21 copy just copy input to output, hashsplitting along the way
22 bench print benchmark timings to stderr
23 max-pack-size= maximum bytes in a single pack
24 max-pack-objects= maximum number of objects in a single pack
25 fanout= maximum number of blobs in a single tree
26 bwlimit= maximum bytes/sec to transmit to server
28 o = options.Options(optspec)
29 (opt, flags, extra) = o.parse(sys.argv[1:])
32 git.check_repo_or_die()
33 if not (opt.blobs or opt.tree or opt.commit or opt.name or
34 opt.noop or opt.copy):
35 o.fatal("use one or more of -b, -t, -c, -n, -N, --copy")
36 if (opt.noop or opt.copy) and (opt.blobs or opt.tree or
37 opt.commit or opt.name):
38 o.fatal('-N and --copy are incompatible with -b, -t, -c, -n')
39 if extra and opt.git_ids:
40 o.fatal("don't provide filenames when using --git-ids")
43 git.verbose = opt.verbose - 1
46 hashsplit.max_pack_size = parse_num(opt.max_pack_size)
47 if opt.max_pack_objects:
48 hashsplit.max_pack_objects = parse_num(opt.max_pack_objects)
50 hashsplit.fanout = parse_num(opt.fanout)
54 client.bwlimit = parse_num(opt.bwlimit)
56 date = parse_date_or_fatal(opt.date, o.fatal)
62 def prog(filenum, nbytes):
66 qprogress('Splitting: file #%d, %d kbytes\r'
67 % (filenum+1, total_bytes/1024))
69 qprogress('Splitting: %d kbytes\r' % (total_bytes/1024))
72 is_reverse = os.environ.get('BUP_SERVER_REVERSE')
73 if is_reverse and opt.remote:
74 o.fatal("don't use -r in reverse mode; it's automatic")
75 start_time = time.time()
77 if opt.name and opt.name.startswith('.'):
78 o.fatal("'%s' is not a valid branch name." % opt.name)
79 refname = opt.name and 'refs/heads/%s' % opt.name or None
80 if opt.noop or opt.copy:
81 cli = pack_writer = oldref = None
82 elif opt.remote or is_reverse:
83 cli = client.Client(opt.remote)
84 oldref = refname and cli.read_ref(refname) or None
85 pack_writer = cli.new_packwriter()
88 oldref = refname and git.read_ref(refname) or None
89 pack_writer = git.PackWriter()
92 # the input is actually a series of git object ids that we should retrieve
95 # This is a bit messy, but basically it converts from a series of
96 # CatPipe.get() iterators into a series of file-type objects.
97 # It would be less ugly if either CatPipe.get() returned a file-like object
98 # (not very efficient), or split_to_shalist() expected an iterator instead
102 def __init__(self, it):
104 def read(self, size):
109 line = sys.stdin.readline()
115 it = cp.get(line.strip())
116 next(it) # skip the file type
118 add_error('error: %s' % e)
123 # the input either comes from a series of files or from stdin.
124 files = extra and (open(fn) for fn in extra) or [sys.stdin]
127 shalist = hashsplit.split_to_shalist(pack_writer, files,
128 keep_boundaries=opt.keep_boundaries,
130 tree = pack_writer.new_tree(shalist)
133 it = hashsplit.hashsplit_iter(files,
134 keep_boundaries=opt.keep_boundaries,
136 for (blob, level) in it:
137 hashsplit.total_split += len(blob)
139 sys.stdout.write(str(blob))
140 megs = hashsplit.total_split/1024/1024
141 if not opt.quiet and last != megs:
142 progress('%d Mbytes read\r' % megs)
144 progress('%d Mbytes read, done.\n' % megs)
149 for (mode,name,bin) in shalist:
150 print bin.encode('hex')
152 print tree.encode('hex')
153 if opt.commit or opt.name:
154 msg = 'bup split\n\nGenerated by command:\n%r' % sys.argv
155 ref = opt.name and ('refs/heads/%s' % opt.name) or None
156 commit = pack_writer.new_commit(oldref, tree, date, msg)
158 print commit.encode('hex')
161 pack_writer.close() # must close before we can update the ref
165 cli.update_ref(refname, commit, oldref)
167 git.update_ref(refname, commit, oldref)
172 secs = time.time() - start_time
173 size = hashsplit.total_split
175 log('\nbup: %.2fkbytes in %.2f secs = %.2f kbytes/sec\n'
176 % (size/1024., secs, size/1024./secs))
179 log('WARNING: %d errors encountered while saving.\n' % len(saved_errors))