+++ /dev/null
-#!/bin/sh
-"""": # -*-python-*-
-bup_python="$(dirname "$0")/bup-python" || exit $?
-exec "$bup_python" "$0" ${1+"$@"}
-"""
-# end of bup preamble
-
-from __future__ import absolute_import, print_function
-from binascii import hexlify
-import glob, math, os, resource, struct, sys, tempfile
-
-from bup import options, git, midx, _helpers, xstat
-from bup.compat import argv_bytes, hexstr, range
-from bup.helpers import (Sha1, add_error, atomically_replaced_file, debug1, fdatasync,
- handle_ctrl_c, log, mmap_readwrite, qprogress,
- saved_errors, unlink)
-from bup.io import byte_stream, path_msg
-
-
-PAGE_SIZE=4096
-SHA_PER_PAGE=PAGE_SIZE/20.
-
-optspec = """
-bup midx [options...] <idxnames...>
---
-o,output= output midx filename (default: auto-generated)
-a,auto automatically use all existing .midx/.idx files as input
-f,force merge produce exactly one .midx containing all objects
-p,print print names of generated midx files
-check validate contents of the given midx files (with -a, all midx files)
-max-files= maximum number of idx files to open at once [-1]
-d,dir= directory containing idx/midx files
-"""
-
-merge_into = _helpers.merge_into
-
-
-def _group(l, count):
- for i in range(0, len(l), count):
- yield l[i:i+count]
-
-
-def max_files():
- mf = min(resource.getrlimit(resource.RLIMIT_NOFILE))
- if mf > 32:
- mf -= 20 # just a safety margin
- else:
- mf -= 6 # minimum safety margin
- return mf
-
-
-def check_midx(name):
- nicename = git.repo_rel(name)
- log('Checking %s.\n' % path_msg(nicename))
- try:
- ix = git.open_idx(name)
- except git.GitError as e:
- add_error('%s: %s' % (pathmsg(name), e))
- return
- for count,subname in enumerate(ix.idxnames):
- sub = git.open_idx(os.path.join(os.path.dirname(name), subname))
- for ecount,e in enumerate(sub):
- if not (ecount % 1234):
- qprogress(' %d/%d: %s %d/%d\r'
- % (count, len(ix.idxnames),
- git.shorten_hash(subname).decode('ascii'),
- ecount, len(sub)))
- if not sub.exists(e):
- add_error("%s: %s: %s missing from idx"
- % (path_msg(nicename),
- git.shorten_hash(subname).decode('ascii'),
- hexstr(e)))
- if not ix.exists(e):
- add_error("%s: %s: %s missing from midx"
- % (path_msg(nicename),
- git.shorten_hash(subname).decode('ascii'),
- hexstr(e)))
- prev = None
- for ecount,e in enumerate(ix):
- if not (ecount % 1234):
- qprogress(' Ordering: %d/%d\r' % (ecount, len(ix)))
- if e and prev and not e >= prev:
- add_error('%s: ordering error: %s < %s'
- % (nicename, hexstr(e), hexstr(prev)))
- prev = e
-
-
-_first = None
-def _do_midx(outdir, outfilename, infilenames, prefixstr):
- global _first
- if not outfilename:
- assert(outdir)
- sum = hexlify(Sha1(b'\0'.join(infilenames)).digest())
- outfilename = b'%s/midx-%s.midx' % (outdir, sum)
-
- inp = []
- total = 0
- allfilenames = []
- midxs = []
- try:
- for name in infilenames:
- ix = git.open_idx(name)
- midxs.append(ix)
- inp.append((
- ix.map,
- len(ix),
- ix.sha_ofs,
- isinstance(ix, midx.PackMidx) and ix.which_ofs or 0,
- len(allfilenames),
- ))
- for n in ix.idxnames:
- allfilenames.append(os.path.basename(n))
- total += len(ix)
- inp.sort(reverse=True, key=lambda x: x[0][x[2] : x[2] + 20])
-
- if not _first: _first = outdir
- dirprefix = (_first != outdir) and git.repo_rel(outdir) + b': ' or b''
- debug1('midx: %s%screating from %d files (%d objects).\n'
- % (dirprefix, prefixstr, len(infilenames), total))
- if (opt.auto and (total < 1024 and len(infilenames) < 3)) \
- or ((opt.auto or opt.force) and len(infilenames) < 2) \
- or (opt.force and not total):
- debug1('midx: nothing to do.\n')
- return
-
- pages = int(total/SHA_PER_PAGE) or 1
- bits = int(math.ceil(math.log(pages, 2)))
- entries = 2**bits
- debug1('midx: table size: %d (%d bits)\n' % (entries*4, bits))
-
- unlink(outfilename)
- with atomically_replaced_file(outfilename, 'wb') as f:
- f.write(b'MIDX')
- f.write(struct.pack('!II', midx.MIDX_VERSION, bits))
- assert(f.tell() == 12)
-
- f.truncate(12 + 4*entries + 20*total + 4*total)
- f.flush()
- fdatasync(f.fileno())
-
- fmap = mmap_readwrite(f, close=False)
- count = merge_into(fmap, bits, total, inp)
- del fmap # Assume this calls msync() now.
- f.seek(0, os.SEEK_END)
- f.write(b'\0'.join(allfilenames))
- finally:
- for ix in midxs:
- if isinstance(ix, midx.PackMidx):
- ix.close()
- midxs = None
- inp = None
-
-
- # This is just for testing (if you enable this, don't clear inp above)
- if 0:
- p = midx.PackMidx(outfilename)
- assert(len(p.idxnames) == len(infilenames))
- log(repr(p.idxnames) + '\n')
- assert(len(p) == total)
- for pe, e in p, git.idxmerge(inp, final_progress=False):
- pin = next(pi)
- assert(i == pin)
- assert(p.exists(i))
-
- return total, outfilename
-
-
-def do_midx(outdir, outfilename, infilenames, prefixstr, prout):
- rv = _do_midx(outdir, outfilename, infilenames, prefixstr)
- if rv and opt['print']:
- prout.write(rv[1] + b'\n')
-
-
-def do_midx_dir(path, outfilename, prout):
- already = {}
- sizes = {}
- if opt.force and not opt.auto:
- midxs = [] # don't use existing midx files
- else:
- midxs = glob.glob(b'%s/*.midx' % path)
- contents = {}
- for mname in midxs:
- m = git.open_idx(mname)
- contents[mname] = [(b'%s/%s' % (path,i)) for i in m.idxnames]
- sizes[mname] = len(m)
-
- # sort the biggest+newest midxes first, so that we can eliminate
- # smaller (or older) redundant ones that come later in the list
- midxs.sort(key=lambda ix: (-sizes[ix], -xstat.stat(ix).st_mtime))
-
- for mname in midxs:
- any = 0
- for iname in contents[mname]:
- if not already.get(iname):
- already[iname] = 1
- any = 1
- if not any:
- debug1('%r is redundant\n' % mname)
- unlink(mname)
- already[mname] = 1
-
- midxs = [k for k in midxs if not already.get(k)]
- idxs = [k for k in glob.glob(b'%s/*.idx' % path) if not already.get(k)]
-
- for iname in idxs:
- i = git.open_idx(iname)
- sizes[iname] = len(i)
-
- all = [(sizes[n],n) for n in (midxs + idxs)]
-
- # FIXME: what are the optimal values? Does this make sense?
- DESIRED_HWM = opt.force and 1 or 5
- DESIRED_LWM = opt.force and 1 or 2
- existed = dict((name,1) for sz,name in all)
- debug1('midx: %d indexes; want no more than %d.\n'
- % (len(all), DESIRED_HWM))
- if len(all) <= DESIRED_HWM:
- debug1('midx: nothing to do.\n')
- while len(all) > DESIRED_HWM:
- all.sort()
- part1 = [name for sz,name in all[:len(all)-DESIRED_LWM+1]]
- part2 = all[len(all)-DESIRED_LWM+1:]
- all = list(do_midx_group(path, outfilename, part1)) + part2
- if len(all) > DESIRED_HWM:
- debug1('\nStill too many indexes (%d > %d). Merging again.\n'
- % (len(all), DESIRED_HWM))
-
- if opt['print']:
- for sz,name in all:
- if not existed.get(name):
- prout.write(name + b'\n')
-
-
-def do_midx_group(outdir, outfilename, infiles):
- groups = list(_group(infiles, opt.max_files))
- gprefix = ''
- for n,sublist in enumerate(groups):
- if len(groups) != 1:
- gprefix = 'Group %d: ' % (n+1)
- rv = _do_midx(outdir, outfilename, sublist, gprefix)
- if rv:
- yield rv
-
-
-handle_ctrl_c()
-
-o = options.Options(optspec)
-(opt, flags, extra) = o.parse(sys.argv[1:])
-opt.dir = argv_bytes(opt.dir) if opt.dir else None
-opt.output = argv_bytes(opt.output) if opt.output else None
-
-if extra and (opt.auto or opt.force):
- o.fatal("you can't use -f/-a and also provide filenames")
-if opt.check and (not extra and not opt.auto):
- o.fatal("if using --check, you must provide filenames or -a")
-
-git.check_repo_or_die()
-
-if opt.max_files < 0:
- opt.max_files = max_files()
-assert(opt.max_files >= 5)
-
-extra = [argv_bytes(x) for x in extra]
-
-if opt.check:
- # check existing midx files
- if extra:
- midxes = extra
- else:
- midxes = []
- paths = opt.dir and [opt.dir] or git.all_packdirs()
- for path in paths:
- debug1('midx: scanning %s\n' % path)
- midxes += glob.glob(os.path.join(path, b'*.midx'))
- for name in midxes:
- check_midx(name)
- if not saved_errors:
- log('All tests passed.\n')
-else:
- if extra:
- sys.stdout.flush()
- do_midx(git.repo(b'objects/pack'), opt.output, extra, b'',
- byte_stream(sys.stdout))
- elif opt.auto or opt.force:
- sys.stdout.flush()
- paths = opt.dir and [opt.dir] or git.all_packdirs()
- for path in paths:
- debug1('midx: scanning %s\n' % path_msg(path))
- do_midx_dir(path, opt.output, byte_stream(sys.stdout))
- else:
- o.fatal("you must use -f or -a or provide input filenames")
-
-if saved_errors:
- log('WARNING: %d errors encountered.\n' % len(saved_errors))
- sys.exit(1)
projects / bup.git / blobdiff