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)
61 last_prog = total_bytes = 0
62 def prog(filenum, nbytes):
63 global last_prog, total_bytes
66 if now - last_prog < 0.2:
69 progress('Splitting: file #%d, %d kbytes\r'
70 % (filenum+1, total_bytes/1024))
72 progress('Splitting: %d kbytes\r' % (total_bytes/1024))
76 is_reverse = os.environ.get('BUP_SERVER_REVERSE')
77 if is_reverse and opt.remote:
78 o.fatal("don't use -r in reverse mode; it's automatic")
79 start_time = time.time()
81 if opt.name and opt.name.startswith('.'):
82 o.fatal("'%s' is not a valid branch name." % opt.name)
83 refname = opt.name and 'refs/heads/%s' % opt.name or None
84 if opt.noop or opt.copy:
85 cli = pack_writer = oldref = None
86 elif opt.remote or is_reverse:
87 cli = client.Client(opt.remote)
88 oldref = refname and cli.read_ref(refname) or None
89 pack_writer = cli.new_packwriter()
92 oldref = refname and git.read_ref(refname) or None
93 pack_writer = git.PackWriter()
96 # the input is actually a series of git object ids that we should retrieve
99 # This is a bit messy, but basically it converts from a series of
100 # CatPipe.get() iterators into a series of file-type objects.
101 # It would be less ugly if either CatPipe.get() returned a file-like object
102 # (not very efficient), or split_to_shalist() expected an iterator instead
106 def __init__(self, it):
108 def read(self, size):
113 line = sys.stdin.readline()
119 it = cp.get(line.strip())
120 next(it) # skip the file type
122 add_error('error: %s' % e)
127 # the input either comes from a series of files or from stdin.
128 files = extra and (open(fn) for fn in extra) or [sys.stdin]
131 shalist = hashsplit.split_to_shalist(pack_writer, files,
132 keep_boundaries=opt.keep_boundaries,
134 tree = pack_writer.new_tree(shalist)
137 for (blob, bits) in hashsplit.hashsplit_iter(files,
138 keep_boundaries=opt.keep_boundaries,
140 hashsplit.total_split += len(blob)
142 sys.stdout.write(str(blob))
143 megs = hashsplit.total_split/1024/1024
144 if not opt.quiet and last != megs:
145 progress('%d Mbytes read\r' % megs)
147 progress('%d Mbytes read, done.\n' % megs)
152 for (mode,name,bin) in shalist:
153 print bin.encode('hex')
155 print tree.encode('hex')
156 if opt.commit or opt.name:
157 msg = 'bup split\n\nGenerated by command:\n%r' % sys.argv
158 ref = opt.name and ('refs/heads/%s' % opt.name) or None
159 commit = pack_writer.new_commit(oldref, tree, date, msg)
161 print commit.encode('hex')
164 pack_writer.close() # must close before we can update the ref
168 cli.update_ref(refname, commit, oldref)
170 git.update_ref(refname, commit, oldref)
175 secs = time.time() - start_time
176 size = hashsplit.total_split
178 log('\nbup: %.2fkbytes in %.2f secs = %.2f kbytes/sec\n'
179 % (size/1024., secs, size/1024./secs))
182 log('WARNING: %d errors encountered while saving.\n' % len(saved_errors))