hgext/remotefilelog/debugcommands.py
author Martin von Zweigbergk <martinvonz@google.com>
Thu, 14 Mar 2019 13:53:20 -0700
changeset 41948 dd1ab72be983
parent 41807 941685500125
child 42943 5fadf6103790
permissions -rw-r--r--
test: demonstrate crash with in-memory rebase and copies In the added test case, there is a merge commit that has one obsolete parent with a rename. Since the rename is not in the other parent, pathcopies() from that other parent will include the copy. Then when we try to rebase this merge commit onto another commit that has the same content changes, but no tracking of the rename (because it was done with "hg remove; hg add" instead of "hg mv"), we try to propagate the copy information. That fails because overlayworkingctx expects a file to be modified if it's going to have copy information. Differential Revision: https://phab.mercurial-scm.org/D6132
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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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    pycompat,
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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: %d 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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   121
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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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   141
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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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   157
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def verifyremotefilelog(ui, path, **opts):
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    decompress = opts.get(r'decompress')
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   160
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   161
    for root, dirs, files in os.walk(path):
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        for file in files:
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   163
            if file == "repos":
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   164
                continue
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   165
            filepath = os.path.join(root, file)
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   166
            size, firstnode, mapping = parsefileblob(filepath, decompress)
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   167
            for p1, p2, linknode, copyfrom in mapping.itervalues():
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   168
                if linknode == nullid:
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                    actualpath = os.path.relpath(root, path)
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                    key = fileserverclient.getcachekey("reponame", actualpath,
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                                                       file)
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                    ui.status("%s %s\n" % (key, os.path.relpath(filepath,
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                                                                path)))
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   174
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def _decompressblob(raw):
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   176
    return zlib.decompress(raw)
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def parsefileblob(path, decompress):
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   179
    f = open(path, "rb")
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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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   187
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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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   212
    for path in paths:
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   213
        if '.data' in path:
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   214
            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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   219
            deltachain = dpack.getdeltachain('', bin(node))
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   220
            dumpdeltachain(ui, deltachain, **opts)
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diff changeset
   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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        lastfilename = None
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        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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            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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                ('%d' % totaldeltasize).ljust(12),
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                ('%d' % 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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                    "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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            else:
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                blobsize = "(missing)"
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            ui.write("%s  %s  %s%s\n" % (
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                hashformatter(node),
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                hashformatter(deltabase),
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                ('%d' % deltalen).ljust(14),
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                pycompat.bytestr(blobsize)))
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        if filename is not None:
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            printtotals()
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        failures += _sanitycheck(ui, set(nodes), bases)
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        if failures > 1:
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            ui.warn(("%d failures\n" % failures))
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            return 1
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def _sanitycheck(ui, nodes, bases):
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    """
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    Does some basic sanity checking on a packfiles with ``nodes`` ``bases`` (a
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    mapping of node->base):
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    - Each deltabase must itself be a node elsewhere in the pack
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    - There must be no cycles
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    """
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    failures = 0
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    for node in nodes:
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        seen = set()
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        current = node
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        deltabase = bases[current]
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        while deltabase != nullid:
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            if deltabase not in nodes:
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                ui.warn(("Bad entry: %s has an unknown deltabase (%s)\n" %
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                        (short(node), short(deltabase))))
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                failures += 1
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                break
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            if deltabase in seen:
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                ui.warn(("Bad entry: %s has a cycle (at %s)\n" %
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                        (short(node), short(deltabase))))
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                failures += 1
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                break
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            current = deltabase
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            seen.add(current)
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            deltabase = bases[current]
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        # Since ``node`` begins a valid chain, reset/memoize its base to nullid
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        # so we don't traverse it again.
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        bases[node] = nullid
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    return failures
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def dumpdeltachain(ui, deltachain, **opts):
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    hashformatter = hex
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    hashlen = 40
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    lastfilename = None
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   334
    for filename, node, filename, deltabasenode, delta in deltachain:
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        if filename != lastfilename:
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            ui.write("\n%s\n" % filename)
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            lastfilename = filename
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   338
        ui.write("%s  %s  %s  %s\n" % (
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            "Node".ljust(hashlen),
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            "Delta Base".ljust(hashlen),
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            "Delta SHA1".ljust(hashlen),
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            "Delta Length".ljust(6),
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        ))
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        ui.write("%s  %s  %s  %d\n" % (
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   346
            hashformatter(node),
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parents:
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   347
            hashformatter(deltabasenode),
40612
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parents: 40610
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   348
            nodemod.hex(hashlib.sha1(delta).digest()),
40495
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parents:
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   349
            len(delta)))
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parents:
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   350
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parents:
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   351
def debughistorypack(ui, path):
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parents:
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   352
    if '.hist' in path:
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Augie Fackler <augie@google.com>
parents:
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   353
        path = path[:path.index('.hist')]
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Augie Fackler <augie@google.com>
parents:
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   354
    hpack = historypack.historypack(path)
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parents:
diff changeset
   355
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Augie Fackler <augie@google.com>
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   356
    lastfilename = None
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parents:
diff changeset
   357
    for entry in hpack.iterentries():
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parents:
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   358
        filename, node, p1node, p2node, linknode, copyfrom = entry
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Augie Fackler <augie@google.com>
parents:
diff changeset
   359
        if filename != lastfilename:
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Augie Fackler <augie@google.com>
parents:
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   360
            ui.write("\n%s\n" % filename)
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Augie Fackler <augie@google.com>
parents:
diff changeset
   361
            ui.write("%s%s%s%s%s\n" % (
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Augie Fackler <augie@google.com>
parents:
diff changeset
   362
                "Node".ljust(14),
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Augie Fackler <augie@google.com>
parents:
diff changeset
   363
                "P1 Node".ljust(14),
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parents:
diff changeset
   364
                "P2 Node".ljust(14),
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Augie Fackler <augie@google.com>
parents:
diff changeset
   365
                "Link Node".ljust(14),
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Augie Fackler <augie@google.com>
parents:
diff changeset
   366
                "Copy From"))
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Augie Fackler <augie@google.com>
parents:
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   367
            lastfilename = filename
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Augie Fackler <augie@google.com>
parents:
diff changeset
   368
        ui.write("%s  %s  %s  %s  %s\n" % (short(node), short(p1node),
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Augie Fackler <augie@google.com>
parents:
diff changeset
   369
            short(p2node), short(linknode), copyfrom))
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Augie Fackler <augie@google.com>
parents:
diff changeset
   370
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Augie Fackler <augie@google.com>
parents:
diff changeset
   371
def debugwaitonrepack(repo):
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Augie Fackler <augie@google.com>
parents:
diff changeset
   372
    with extutil.flock(repack.repacklockvfs(repo).join('repacklock'), ''):
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Augie Fackler <augie@google.com>
parents:
diff changeset
   373
        return
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Augie Fackler <augie@google.com>
parents:
diff changeset
   374
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Augie Fackler <augie@google.com>
parents:
diff changeset
   375
def debugwaitonprefetch(repo):
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parents:
diff changeset
   376
    with repo._lock(repo.svfs, "prefetchlock", True, None,
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Augie Fackler <augie@google.com>
parents:
diff changeset
   377
                         None, _('prefetching in %s') % repo.origroot):
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Augie Fackler <augie@google.com>
parents:
diff changeset
   378
        pass