2 import sys, math, struct, glob, sha
7 SHA_PER_PAGE=PAGE_SIZE/200.
10 def merge(idxlist, bits, table):
12 for e in git.idxmerge(idxlist):
14 prefix = git.extract_bits(e, bits)
19 def do_midx(outdir, outfilename, infilenames):
22 sum = sha.sha('\0'.join(infilenames)).hexdigest()
23 outfilename = '%s/midx-%s.midx' % (outdir, sum)
27 for name in infilenames:
28 ix = git.PackIndex(name)
32 log('Merging %d indexes (%d objects).\n' % (len(infilenames), total))
33 if total < 1024 and len(infilenames) < 3:
34 log('%s: not enough objects for a .midx to be useful.\n' % outdir)
37 pages = int(total/SHA_PER_PAGE) or 1
38 bits = int(math.ceil(math.log(pages, 2)))
40 log('Table size: %d (%d bits)\n' % (entries*4, bits))
45 os.unlink(outfilename)
48 f = open(outfilename + '.tmp', 'w+')
49 f.write('MIDX\0\0\0\1')
50 f.write(struct.pack('!I', bits))
51 assert(f.tell() == 12)
52 f.write('\0'*8*entries)
54 for e in merge(inp, bits, table):
57 f.write('\0'.join([os.path.basename(p) for p in infilenames]))
60 f.write(struct.pack('!%dQ' % entries, *table))
62 os.rename(outfilename + '.tmp', outfilename)
64 # this is just for testing
66 p = git.PackMidx(outfilename)
67 assert(len(p.idxnames) == len(infilenames))
69 assert(len(p) == total)
71 for i in merge(inp, total, bits, table):
72 assert(i == pi.next())
78 bup midx [options...] <idxnames...>
80 o,output= output midx filename (default: auto-generated)
81 a,auto automatically create .midx from any unindexed .idx files
82 f,force automatically create .midx from *all* .idx files
84 o = options.Options('bup midx', optspec)
85 (opt, flags, extra) = o.parse(sys.argv[1:])
87 if extra and (opt.auto or opt.force):
88 log("bup midx: you can't use -f/-a and also provide filenames\n")
91 git.check_repo_or_die()
94 do_midx(git.repo('objects/pack'), opt.output, extra)
95 elif opt.auto or opt.force:
96 paths = [git.repo('objects/pack')]
97 paths += glob.glob(git.repo('index-cache/*/.'))
100 do_midx(path, opt.output, glob.glob('%s/*.idx' % path))
103 m = git.MultiPackIndex(path)
105 for pack in m.packs: # only .idx files without a .midx are open
106 if pack.name.endswith('.idx'):
107 needed[pack.name] = 1
109 do_midx(path, opt.output, needed.keys())
111 log("bup midx: you must use -f or -a or provide input filenames\n")