remotefilelog: consolidate and rename on-disk store requirement
The value of this constant appeared in too many places. While we're
here, rename it to be more consistent with our naming conventions for
experimental functionality.
Differential Revision: https://phab.mercurial-scm.org/D5128
# debugcommands.py - debug logic for remotefilelog
#
# Copyright 2013 Facebook, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import hashlib
import os
import zlib
from mercurial.node import bin, hex, nullid, short
from mercurial.i18n import _
from mercurial import (
error,
filelog,
revlog,
)
from . import (
constants,
datapack,
extutil,
fileserverclient,
historypack,
repack,
shallowutil,
)
def debugremotefilelog(ui, path, **opts):
decompress = opts.get('decompress')
size, firstnode, mapping = parsefileblob(path, decompress)
ui.status(_("size: %s bytes\n") % (size))
ui.status(_("path: %s \n") % (path))
ui.status(_("key: %s \n") % (short(firstnode)))
ui.status(_("\n"))
ui.status(_("%12s => %12s %13s %13s %12s\n") %
("node", "p1", "p2", "linknode", "copyfrom"))
queue = [firstnode]
while queue:
node = queue.pop(0)
p1, p2, linknode, copyfrom = mapping[node]
ui.status(_("%s => %s %s %s %s\n") %
(short(node), short(p1), short(p2), short(linknode), copyfrom))
if p1 != nullid:
queue.append(p1)
if p2 != nullid:
queue.append(p2)
def buildtemprevlog(repo, file):
# get filename key
filekey = hashlib.sha1(file).hexdigest()
filedir = os.path.join(repo.path, 'store/data', filekey)
# sort all entries based on linkrev
fctxs = []
for filenode in os.listdir(filedir):
if '_old' not in filenode:
fctxs.append(repo.filectx(file, fileid=bin(filenode)))
fctxs = sorted(fctxs, key=lambda x: x.linkrev())
# add to revlog
temppath = repo.sjoin('data/temprevlog.i')
if os.path.exists(temppath):
os.remove(temppath)
r = filelog.filelog(repo.svfs, 'temprevlog')
class faket(object):
def add(self, a, b, c):
pass
t = faket()
for fctx in fctxs:
if fctx.node() not in repo:
continue
p = fctx.filelog().parents(fctx.filenode())
meta = {}
if fctx.renamed():
meta['copy'] = fctx.renamed()[0]
meta['copyrev'] = hex(fctx.renamed()[1])
r.add(fctx.data(), meta, t, fctx.linkrev(), p[0], p[1])
return r
def debugindex(orig, ui, repo, file_=None, **opts):
"""dump the contents of an index file"""
if (opts.get('changelog') or
opts.get('manifest') or
opts.get('dir') or
not constants.SHALLOWREPO_REQUIREMENT in repo.requirements or
not repo.shallowmatch(file_)):
return orig(ui, repo, file_, **opts)
r = buildtemprevlog(repo, file_)
# debugindex like normal
format = opts.get('format', 0)
if format not in (0, 1):
raise error.Abort(_("unknown format %d") % format)
generaldelta = r.version & revlog.FLAG_GENERALDELTA
if generaldelta:
basehdr = ' delta'
else:
basehdr = ' base'
if format == 0:
ui.write((" rev offset length " + basehdr + " linkrev"
" nodeid p1 p2\n"))
elif format == 1:
ui.write((" rev flag offset length"
" size " + basehdr + " link p1 p2"
" nodeid\n"))
for i in r:
node = r.node(i)
if generaldelta:
base = r.deltaparent(i)
else:
base = r.chainbase(i)
if format == 0:
try:
pp = r.parents(node)
except Exception:
pp = [nullid, nullid]
ui.write("% 6d % 9d % 7d % 6d % 7d %s %s %s\n" % (
i, r.start(i), r.length(i), base, r.linkrev(i),
short(node), short(pp[0]), short(pp[1])))
elif format == 1:
pr = r.parentrevs(i)
ui.write("% 6d %04x % 8d % 8d % 8d % 6d % 6d % 6d % 6d %s\n" % (
i, r.flags(i), r.start(i), r.length(i), r.rawsize(i),
base, r.linkrev(i), pr[0], pr[1], short(node)))
def debugindexdot(orig, ui, repo, file_):
"""dump an index DAG as a graphviz dot file"""
if not constants.SHALLOWREPO_REQUIREMENT in repo.requirements:
return orig(ui, repo, file_)
r = buildtemprevlog(repo, os.path.basename(file_)[:-2])
ui.write(("digraph G {\n"))
for i in r:
node = r.node(i)
pp = r.parents(node)
ui.write("\t%d -> %d\n" % (r.rev(pp[0]), i))
if pp[1] != nullid:
ui.write("\t%d -> %d\n" % (r.rev(pp[1]), i))
ui.write("}\n")
def verifyremotefilelog(ui, path, **opts):
decompress = opts.get('decompress')
for root, dirs, files in os.walk(path):
for file in files:
if file == "repos":
continue
filepath = os.path.join(root, file)
size, firstnode, mapping = parsefileblob(filepath, decompress)
for p1, p2, linknode, copyfrom in mapping.itervalues():
if linknode == nullid:
actualpath = os.path.relpath(root, path)
key = fileserverclient.getcachekey("reponame", actualpath,
file)
ui.status("%s %s\n" % (key, os.path.relpath(filepath,
path)))
def _decompressblob(raw):
return zlib.decompress(raw)
def parsefileblob(path, decompress):
raw = None
f = open(path, "r")
try:
raw = f.read()
finally:
f.close()
if decompress:
raw = _decompressblob(raw)
offset, size, flags = shallowutil.parsesizeflags(raw)
start = offset + size
firstnode = None
mapping = {}
while start < len(raw):
divider = raw.index('\0', start + 80)
currentnode = raw[start:(start + 20)]
if not firstnode:
firstnode = currentnode
p1 = raw[(start + 20):(start + 40)]
p2 = raw[(start + 40):(start + 60)]
linknode = raw[(start + 60):(start + 80)]
copyfrom = raw[(start + 80):divider]
mapping[currentnode] = (p1, p2, linknode, copyfrom)
start = divider + 1
return size, firstnode, mapping
def debugdatapack(ui, *paths, **opts):
for path in paths:
if '.data' in path:
path = path[:path.index('.data')]
ui.write("%s:\n" % path)
dpack = datapack.datapack(path)
node = opts.get('node')
if node:
deltachain = dpack.getdeltachain('', bin(node))
dumpdeltachain(ui, deltachain, **opts)
return
if opts.get('long'):
hashformatter = hex
hashlen = 42
else:
hashformatter = short
hashlen = 14
lastfilename = None
totaldeltasize = 0
totalblobsize = 0
def printtotals():
if lastfilename is not None:
ui.write("\n")
if not totaldeltasize or not totalblobsize:
return
difference = totalblobsize - totaldeltasize
deltastr = "%0.1f%% %s" % (
(100.0 * abs(difference) / totalblobsize),
("smaller" if difference > 0 else "bigger"))
ui.write(("Total:%s%s %s (%s)\n") % (
"".ljust(2 * hashlen - len("Total:")),
str(totaldeltasize).ljust(12),
str(totalblobsize).ljust(9),
deltastr
))
bases = {}
nodes = set()
failures = 0
for filename, node, deltabase, deltalen in dpack.iterentries():
bases[node] = deltabase
if node in nodes:
ui.write(("Bad entry: %s appears twice\n" % short(node)))
failures += 1
nodes.add(node)
if filename != lastfilename:
printtotals()
name = '(empty name)' if filename == '' else filename
ui.write("%s:\n" % name)
ui.write("%s%s%s%s\n" % (
"Node".ljust(hashlen),
"Delta Base".ljust(hashlen),
"Delta Length".ljust(14),
"Blob Size".ljust(9)))
lastfilename = filename
totalblobsize = 0
totaldeltasize = 0
# Metadata could be missing, in which case it will be an empty dict.
meta = dpack.getmeta(filename, node)
if constants.METAKEYSIZE in meta:
blobsize = meta[constants.METAKEYSIZE]
totaldeltasize += deltalen
totalblobsize += blobsize
else:
blobsize = "(missing)"
ui.write("%s %s %s%s\n" % (
hashformatter(node),
hashformatter(deltabase),
str(deltalen).ljust(14),
blobsize))
if filename is not None:
printtotals()
failures += _sanitycheck(ui, set(nodes), bases)
if failures > 1:
ui.warn(("%d failures\n" % failures))
return 1
def _sanitycheck(ui, nodes, bases):
"""
Does some basic sanity checking on a packfiles with ``nodes`` ``bases`` (a
mapping of node->base):
- Each deltabase must itself be a node elsewhere in the pack
- There must be no cycles
"""
failures = 0
for node in nodes:
seen = set()
current = node
deltabase = bases[current]
while deltabase != nullid:
if deltabase not in nodes:
ui.warn(("Bad entry: %s has an unknown deltabase (%s)\n" %
(short(node), short(deltabase))))
failures += 1
break
if deltabase in seen:
ui.warn(("Bad entry: %s has a cycle (at %s)\n" %
(short(node), short(deltabase))))
failures += 1
break
current = deltabase
seen.add(current)
deltabase = bases[current]
# Since ``node`` begins a valid chain, reset/memoize its base to nullid
# so we don't traverse it again.
bases[node] = nullid
return failures
def dumpdeltachain(ui, deltachain, **opts):
hashformatter = hex
hashlen = 40
lastfilename = None
for filename, node, filename, deltabasenode, delta in deltachain:
if filename != lastfilename:
ui.write("\n%s\n" % filename)
lastfilename = filename
ui.write("%s %s %s %s\n" % (
"Node".ljust(hashlen),
"Delta Base".ljust(hashlen),
"Delta SHA1".ljust(hashlen),
"Delta Length".ljust(6),
))
ui.write("%s %s %s %s\n" % (
hashformatter(node),
hashformatter(deltabasenode),
hashlib.sha1(delta).hexdigest(),
len(delta)))
def debughistorypack(ui, path):
if '.hist' in path:
path = path[:path.index('.hist')]
hpack = historypack.historypack(path)
lastfilename = None
for entry in hpack.iterentries():
filename, node, p1node, p2node, linknode, copyfrom = entry
if filename != lastfilename:
ui.write("\n%s\n" % filename)
ui.write("%s%s%s%s%s\n" % (
"Node".ljust(14),
"P1 Node".ljust(14),
"P2 Node".ljust(14),
"Link Node".ljust(14),
"Copy From"))
lastfilename = filename
ui.write("%s %s %s %s %s\n" % (short(node), short(p1node),
short(p2node), short(linknode), copyfrom))
def debugwaitonrepack(repo):
with extutil.flock(repack.repacklockvfs(repo).join('repacklock'), ''):
return
def debugwaitonprefetch(repo):
with repo._lock(repo.svfs, "prefetchlock", True, None,
None, _('prefetching in %s') % repo.origroot):
pass