hgext/remotefilelog/debugcommands.py
author Pulkit Goyal <pulkit@yandex-team.ru>
Tue, 13 Nov 2018 18:07:21 +0300
changeset 40612 3fa4183e7803
parent 40610 13d4ad8d7801
child 40614 aa588bf40a08
permissions -rw-r--r--
py3: use node.hex(h.digest()) instead of h.hexdigest() hashlib.sha1.hexdigest() returns str on Python 3. Differential Revision: https://phab.mercurial-scm.org/D5261
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# debugcommands.py - debug logic for remotefilelog
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#
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# Copyright 2013 Facebook, Inc.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import hashlib
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import os
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import zlib
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from mercurial.node import bin, hex, nullid, short
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from mercurial.i18n import _
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from mercurial import (
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    error,
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    filelog,
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    node as nodemod,
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    revlog,
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)
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from . import (
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    constants,
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    datapack,
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    extutil,
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    fileserverclient,
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    historypack,
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    repack,
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    shallowutil,
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)
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def debugremotefilelog(ui, path, **opts):
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    decompress = opts.get(r'decompress')
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    size, firstnode, mapping = parsefileblob(path, decompress)
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    ui.status(_("size: %s bytes\n") % (size))
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    ui.status(_("path: %s \n") % (path))
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    ui.status(_("key: %s \n") % (short(firstnode)))
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    ui.status(_("\n"))
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    ui.status(_("%12s => %12s %13s %13s %12s\n") %
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              ("node", "p1", "p2", "linknode", "copyfrom"))
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    queue = [firstnode]
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    while queue:
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        node = queue.pop(0)
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        p1, p2, linknode, copyfrom = mapping[node]
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        ui.status(_("%s => %s  %s  %s  %s\n") %
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            (short(node), short(p1), short(p2), short(linknode), copyfrom))
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        if p1 != nullid:
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            queue.append(p1)
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        if p2 != nullid:
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            queue.append(p2)
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def buildtemprevlog(repo, file):
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    # get filename key
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    filekey = nodemod.hex(hashlib.sha1(file).digest())
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    filedir = os.path.join(repo.path, 'store/data', filekey)
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    # sort all entries based on linkrev
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    fctxs = []
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    for filenode in os.listdir(filedir):
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        if '_old' not in filenode:
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            fctxs.append(repo.filectx(file, fileid=bin(filenode)))
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    fctxs = sorted(fctxs, key=lambda x: x.linkrev())
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    # add to revlog
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    temppath = repo.sjoin('data/temprevlog.i')
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    if os.path.exists(temppath):
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        os.remove(temppath)
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    r = filelog.filelog(repo.svfs, 'temprevlog')
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    class faket(object):
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        def add(self, a, b, c):
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            pass
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    t = faket()
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    for fctx in fctxs:
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        if fctx.node() not in repo:
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            continue
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        p = fctx.filelog().parents(fctx.filenode())
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        meta = {}
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        if fctx.renamed():
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            meta['copy'] = fctx.renamed()[0]
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            meta['copyrev'] = hex(fctx.renamed()[1])
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        r.add(fctx.data(), meta, t, fctx.linkrev(), p[0], p[1])
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    return r
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def debugindex(orig, ui, repo, file_=None, **opts):
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    """dump the contents of an index file"""
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    if (opts.get(r'changelog') or
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        opts.get(r'manifest') or
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        opts.get(r'dir') or
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        not shallowutil.isenabled(repo) or
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        not repo.shallowmatch(file_)):
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        return orig(ui, repo, file_, **opts)
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    r = buildtemprevlog(repo, file_)
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    # debugindex like normal
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    format = opts.get('format', 0)
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    if format not in (0, 1):
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        raise error.Abort(_("unknown format %d") % format)
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    generaldelta = r.version & revlog.FLAG_GENERALDELTA
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    if generaldelta:
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        basehdr = ' delta'
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    else:
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        basehdr = '  base'
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    if format == 0:
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        ui.write(("   rev    offset  length " + basehdr + " linkrev"
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                  " nodeid       p1           p2\n"))
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    elif format == 1:
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        ui.write(("   rev flag   offset   length"
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                  "     size " + basehdr + "   link     p1     p2"
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                  "       nodeid\n"))
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   120
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    for i in r:
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        node = r.node(i)
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        if generaldelta:
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            base = r.deltaparent(i)
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        else:
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            base = r.chainbase(i)
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        if format == 0:
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            try:
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                pp = r.parents(node)
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            except Exception:
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                pp = [nullid, nullid]
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            ui.write("% 6d % 9d % 7d % 6d % 7d %s %s %s\n" % (
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                    i, r.start(i), r.length(i), base, r.linkrev(i),
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                    short(node), short(pp[0]), short(pp[1])))
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        elif format == 1:
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            pr = r.parentrevs(i)
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            ui.write("% 6d %04x % 8d % 8d % 8d % 6d % 6d % 6d % 6d %s\n" % (
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                    i, r.flags(i), r.start(i), r.length(i), r.rawsize(i),
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                    base, r.linkrev(i), pr[0], pr[1], short(node)))
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def debugindexdot(orig, ui, repo, file_):
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    """dump an index DAG as a graphviz dot file"""
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    if not shallowutil.isenabled(repo):
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        return orig(ui, repo, file_)
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    r = buildtemprevlog(repo, os.path.basename(file_)[:-2])
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    ui.write(("digraph G {\n"))
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    for i in r:
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        node = r.node(i)
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        pp = r.parents(node)
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        ui.write("\t%d -> %d\n" % (r.rev(pp[0]), i))
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        if pp[1] != nullid:
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            ui.write("\t%d -> %d\n" % (r.rev(pp[1]), i))
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    ui.write("}\n")
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   156
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def verifyremotefilelog(ui, path, **opts):
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    decompress = opts.get(r'decompress')
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   159
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    for root, dirs, files in os.walk(path):
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        for file in files:
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            if file == "repos":
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                continue
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   164
            filepath = os.path.join(root, file)
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            size, firstnode, mapping = parsefileblob(filepath, decompress)
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   166
            for p1, p2, linknode, copyfrom in mapping.itervalues():
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   167
                if linknode == nullid:
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                    actualpath = os.path.relpath(root, path)
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   169
                    key = fileserverclient.getcachekey("reponame", actualpath,
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                                                       file)
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   171
                    ui.status("%s %s\n" % (key, os.path.relpath(filepath,
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                                                                path)))
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   173
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def _decompressblob(raw):
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   175
    return zlib.decompress(raw)
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   176
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def parsefileblob(path, decompress):
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   178
    raw = None
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   179
    f = open(path, "r")
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    try:
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   181
        raw = f.read()
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   182
    finally:
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   183
        f.close()
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   184
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   185
    if decompress:
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   186
        raw = _decompressblob(raw)
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   188
    offset, size, flags = shallowutil.parsesizeflags(raw)
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   189
    start = offset + size
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   190
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   191
    firstnode = None
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   192
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   193
    mapping = {}
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   194
    while start < len(raw):
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   195
        divider = raw.index('\0', start + 80)
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   196
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   197
        currentnode = raw[start:(start + 20)]
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diff changeset
   198
        if not firstnode:
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   199
            firstnode = currentnode
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   200
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   201
        p1 = raw[(start + 20):(start + 40)]
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   202
        p2 = raw[(start + 40):(start + 60)]
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   203
        linknode = raw[(start + 60):(start + 80)]
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   204
        copyfrom = raw[(start + 80):divider]
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   205
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   206
        mapping[currentnode] = (p1, p2, linknode, copyfrom)
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   207
        start = divider + 1
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   208
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   209
    return size, firstnode, mapping
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   210
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   211
def debugdatapack(ui, *paths, **opts):
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    for path in paths:
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   213
        if '.data' in path:
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            path = path[:path.index('.data')]
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   215
        ui.write("%s:\n" % path)
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   216
        dpack = datapack.datapack(path)
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        node = opts.get(r'node')
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        if node:
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            deltachain = dpack.getdeltachain('', bin(node))
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   220
            dumpdeltachain(ui, deltachain, **opts)
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   221
            return
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   222
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   223
        if opts.get(r'long'):
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   224
            hashformatter = hex
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   225
            hashlen = 42
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   226
        else:
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   227
            hashformatter = short
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   228
            hashlen = 14
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   229
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   230
        lastfilename = None
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   231
        totaldeltasize = 0
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        totalblobsize = 0
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        def printtotals():
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            if lastfilename is not None:
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                ui.write("\n")
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            if not totaldeltasize or not totalblobsize:
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                return
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            difference = totalblobsize - totaldeltasize
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   239
            deltastr = "%0.1f%% %s" % (
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                (100.0 * abs(difference) / totalblobsize),
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                ("smaller" if difference > 0 else "bigger"))
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            ui.write(("Total:%s%s  %s (%s)\n") % (
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                "".ljust(2 * hashlen - len("Total:")),
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                str(totaldeltasize).ljust(12),
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                str(totalblobsize).ljust(9),
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                deltastr
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            ))
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        bases = {}
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        nodes = set()
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        failures = 0
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        for filename, node, deltabase, deltalen in dpack.iterentries():
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            bases[node] = deltabase
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            if node in nodes:
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                ui.write(("Bad entry: %s appears twice\n" % short(node)))
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                failures += 1
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            nodes.add(node)
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            if filename != lastfilename:
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                printtotals()
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                name = '(empty name)' if filename == '' else filename
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                ui.write("%s:\n" % name)
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                ui.write("%s%s%s%s\n" % (
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   264
                    "Node".ljust(hashlen),
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                    "Delta Base".ljust(hashlen),
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                    "Delta Length".ljust(14),
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                    "Blob Size".ljust(9)))
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                lastfilename = filename
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                totalblobsize = 0
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                totaldeltasize = 0
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            # Metadata could be missing, in which case it will be an empty dict.
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            meta = dpack.getmeta(filename, node)
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            if constants.METAKEYSIZE in meta:
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                blobsize = meta[constants.METAKEYSIZE]
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                totaldeltasize += deltalen
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                totalblobsize += blobsize
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   278
            else:
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                blobsize = "(missing)"
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   280
            ui.write("%s  %s  %s%s\n" % (
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   281
                hashformatter(node),
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   282
                hashformatter(deltabase),
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   283
                str(deltalen).ljust(14),
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   284
                blobsize))
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   285
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        if filename is not None:
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   287
            printtotals()
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   288
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   289
        failures += _sanitycheck(ui, set(nodes), bases)
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   290
        if failures > 1:
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diff changeset
   291
            ui.warn(("%d failures\n" % failures))
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   292
            return 1
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   293
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   294
def _sanitycheck(ui, nodes, bases):
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   295
    """
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   296
    Does some basic sanity checking on a packfiles with ``nodes`` ``bases`` (a
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   297
    mapping of node->base):
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   298
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   299
    - Each deltabase must itself be a node elsewhere in the pack
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   300
    - There must be no cycles
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   301
    """
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   302
    failures = 0
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   303
    for node in nodes:
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   304
        seen = set()
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diff changeset
   305
        current = node
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diff changeset
   306
        deltabase = bases[current]
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diff changeset
   307
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diff changeset
   308
        while deltabase != nullid:
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diff changeset
   309
            if deltabase not in nodes:
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diff changeset
   310
                ui.warn(("Bad entry: %s has an unknown deltabase (%s)\n" %
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diff changeset
   311
                        (short(node), short(deltabase))))
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diff changeset
   312
                failures += 1
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   313
                break
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   314
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diff changeset
   315
            if deltabase in seen:
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diff changeset
   316
                ui.warn(("Bad entry: %s has a cycle (at %s)\n" %
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diff changeset
   317
                        (short(node), short(deltabase))))
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diff changeset
   318
                failures += 1
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parents:
diff changeset
   319
                break
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parents:
diff changeset
   320
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parents:
diff changeset
   321
            current = deltabase
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parents:
diff changeset
   322
            seen.add(current)
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parents:
diff changeset
   323
            deltabase = bases[current]
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parents:
diff changeset
   324
        # Since ``node`` begins a valid chain, reset/memoize its base to nullid
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parents:
diff changeset
   325
        # so we don't traverse it again.
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diff changeset
   326
        bases[node] = nullid
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diff changeset
   327
    return failures
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diff changeset
   328
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diff changeset
   329
def dumpdeltachain(ui, deltachain, **opts):
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parents:
diff changeset
   330
    hashformatter = hex
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parents:
diff changeset
   331
    hashlen = 40
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parents:
diff changeset
   332
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parents:
diff changeset
   333
    lastfilename = None
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Augie Fackler <augie@google.com>
parents:
diff changeset
   334
    for filename, node, filename, deltabasenode, delta in deltachain:
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parents:
diff changeset
   335
        if filename != lastfilename:
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parents:
diff changeset
   336
            ui.write("\n%s\n" % filename)
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parents:
diff changeset
   337
            lastfilename = filename
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parents:
diff changeset
   338
        ui.write("%s  %s  %s  %s\n" % (
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parents:
diff changeset
   339
            "Node".ljust(hashlen),
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Augie Fackler <augie@google.com>
parents:
diff changeset
   340
            "Delta Base".ljust(hashlen),
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parents:
diff changeset
   341
            "Delta SHA1".ljust(hashlen),
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Augie Fackler <augie@google.com>
parents:
diff changeset
   342
            "Delta Length".ljust(6),
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parents:
diff changeset
   343
        ))
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parents:
diff changeset
   344
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parents:
diff changeset
   345
        ui.write("%s  %s  %s  %s\n" % (
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parents:
diff changeset
   346
            hashformatter(node),
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Augie Fackler <augie@google.com>
parents:
diff changeset
   347
            hashformatter(deltabasenode),
40612
3fa4183e7803 py3: use node.hex(h.digest()) instead of h.hexdigest()
Pulkit Goyal <pulkit@yandex-team.ru>
parents: 40610
diff changeset
   348
            nodemod.hex(hashlib.sha1(delta).digest()),
40495
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            len(delta)))
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def debughistorypack(ui, path):
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    if '.hist' in path:
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        path = path[:path.index('.hist')]
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    hpack = historypack.historypack(path)
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    lastfilename = None
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    for entry in hpack.iterentries():
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        filename, node, p1node, p2node, linknode, copyfrom = entry
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        if filename != lastfilename:
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            ui.write("\n%s\n" % filename)
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            ui.write("%s%s%s%s%s\n" % (
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                "Node".ljust(14),
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                "P1 Node".ljust(14),
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                "P2 Node".ljust(14),
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                "Link Node".ljust(14),
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                "Copy From"))
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            lastfilename = filename
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        ui.write("%s  %s  %s  %s  %s\n" % (short(node), short(p1node),
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            short(p2node), short(linknode), copyfrom))
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def debugwaitonrepack(repo):
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    with extutil.flock(repack.repacklockvfs(repo).join('repacklock'), ''):
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        return
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def debugwaitonprefetch(repo):
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    with repo._lock(repo.svfs, "prefetchlock", True, None,
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                         None, _('prefetching in %s') % repo.origroot):
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        pass