annotate hgext/gpg.py @ 16175:280e834c9d15 stable

log: restore cache used by --copies

The {filelog -> linkrev -> copyfrom} cache was refactored and broken by:

  changeset:   10060:f780b1098efc
  user:        Patrick Mezard <[e-mail]>
  date:        Sun Dec 13 18:06:24 2009 +0100
  summary:     templatekw: change {file_copies} behaviour, add
               {file_copies_switch}

With --copies, this cache is accessed for every touched file of every revision.
Unfortunately it is recreated for every revision, which means filelogs are
parsed again. This patch makes the cache global again for all revisions.

A couple of indicative timings of "hg log --copies", before and after:

hg:                       44s /     5s
mozilla --limit 10000:  3m51s /  2m32s
mozilla:               23m46s / 12m23s

I do not know any good tool to trace memory consumption of these runs for
comparisons. Watching the full mozilla run in top, the process did not seem to
misbehave.

# Copyright 2005, 2006 Benoit Boissinot <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''commands to sign and verify changesets'''

import os, tempfile, binascii
from mercurial import util, commands, match, cmdutil
from mercurial import node as hgnode
from mercurial.i18n import _

cmdtable = {}
command = cmdutil.command(cmdtable)

class gpg(object):
    def __init__(self, path, key=None):
        self.path = path
        self.key = (key and " --local-user \"%s\"" % key) or ""

    def sign(self, data):
        gpgcmd = "%s --sign --detach-sign%s" % (self.path, self.key)
        return util.filter(data, gpgcmd)

    def verify(self, data, sig):
        """ returns of the good and bad signatures"""
        sigfile = datafile = None
        try:
            # create temporary files
            fd, sigfile = tempfile.mkstemp(prefix="hg-gpg-", suffix=".sig")
            fp = os.fdopen(fd, 'wb')
            fp.write(sig)
            fp.close()
            fd, datafile = tempfile.mkstemp(prefix="hg-gpg-", suffix=".txt")
            fp = os.fdopen(fd, 'wb')
            fp.write(data)
            fp.close()
            gpgcmd = ("%s --logger-fd 1 --status-fd 1 --verify "
                      "\"%s\" \"%s\"" % (self.path, sigfile, datafile))
            ret = util.filter("", gpgcmd)
        finally:
            for f in (sigfile, datafile):
                try:
                    if f:
                        os.unlink(f)
                except:
                    pass
        keys = []
        key, fingerprint = None, None
        err = ""
        for l in ret.splitlines():
            # see DETAILS in the gnupg documentation
            # filter the logger output
            if not l.startswith("[GNUPG:]"):
                continue
            l = l[9:]
            if l.startswith("ERRSIG"):
                err = _("error while verifying signature")
                break
            elif l.startswith("VALIDSIG"):
                # fingerprint of the primary key
                fingerprint = l.split()[10]
            elif (l.startswith("GOODSIG") or
                  l.startswith("EXPSIG") or
                  l.startswith("EXPKEYSIG") or
                  l.startswith("BADSIG")):
                if key is not None:
                    keys.append(key + [fingerprint])
                key = l.split(" ", 2)
                fingerprint = None
        if err:
            return err, []
        if key is not None:
            keys.append(key + [fingerprint])
        return err, keys

def newgpg(ui, **opts):
    """create a new gpg instance"""
    gpgpath = ui.config("gpg", "cmd", "gpg")
    gpgkey = opts.get('key')
    if not gpgkey:
        gpgkey = ui.config("gpg", "key", None)
    return gpg(gpgpath, gpgkey)

def sigwalk(repo):
    """
    walk over every sigs, yields a couple
    ((node, version, sig), (filename, linenumber))
    """
    def parsefile(fileiter, context):
        ln = 1
        for l in fileiter:
            if not l:
                continue
            yield (l.split(" ", 2), (context, ln))
            ln += 1

    # read the heads
    fl = repo.file(".hgsigs")
    for r in reversed(fl.heads()):
        fn = ".hgsigs|%s" % hgnode.short(r)
        for item in parsefile(fl.read(r).splitlines(), fn):
            yield item
    try:
        # read local signatures
        fn = "localsigs"
        for item in parsefile(repo.opener(fn), fn):
            yield item
    except IOError:
        pass

def getkeys(ui, repo, mygpg, sigdata, context):
    """get the keys who signed a data"""
    fn, ln = context
    node, version, sig = sigdata
    prefix = "%s:%d" % (fn, ln)
    node = hgnode.bin(node)

    data = node2txt(repo, node, version)
    sig = binascii.a2b_base64(sig)
    err, keys = mygpg.verify(data, sig)
    if err:
        ui.warn("%s:%d %s\n" % (fn, ln , err))
        return None

    validkeys = []
    # warn for expired key and/or sigs
    for key in keys:
        if key[0] == "BADSIG":
            ui.write(_("%s Bad signature from \"%s\"\n") % (prefix, key[2]))
            continue
        if key[0] == "EXPSIG":
            ui.write(_("%s Note: Signature has expired"
                       " (signed by: \"%s\")\n") % (prefix, key[2]))
        elif key[0] == "EXPKEYSIG":
            ui.write(_("%s Note: This key has expired"
                       " (signed by: \"%s\")\n") % (prefix, key[2]))
        validkeys.append((key[1], key[2], key[3]))
    return validkeys

@command("sigs", [], _('hg sigs'))
def sigs(ui, repo):
    """list signed changesets"""
    mygpg = newgpg(ui)
    revs = {}

    for data, context in sigwalk(repo):
        node, version, sig = data
        fn, ln = context
        try:
            n = repo.lookup(node)
        except KeyError:
            ui.warn(_("%s:%d node does not exist\n") % (fn, ln))
            continue
        r = repo.changelog.rev(n)
        keys = getkeys(ui, repo, mygpg, data, context)
        if not keys:
            continue
        revs.setdefault(r, [])
        revs[r].extend(keys)
    for rev in sorted(revs, reverse=True):
        for k in revs[rev]:
            r = "%5d:%s" % (rev, hgnode.hex(repo.changelog.node(rev)))
            ui.write("%-30s %s\n" % (keystr(ui, k), r))

@command("sigcheck", [], _('hg sigcheck REVISION'))
def check(ui, repo, rev):
    """verify all the signatures there may be for a particular revision"""
    mygpg = newgpg(ui)
    rev = repo.lookup(rev)
    hexrev = hgnode.hex(rev)
    keys = []

    for data, context in sigwalk(repo):
        node, version, sig = data
        if node == hexrev:
            k = getkeys(ui, repo, mygpg, data, context)
            if k:
                keys.extend(k)

    if not keys:
        ui.write(_("No valid signature for %s\n") % hgnode.short(rev))
        return

    # print summary
    ui.write("%s is signed by:\n" % hgnode.short(rev))
    for key in keys:
        ui.write(" %s\n" % keystr(ui, key))

def keystr(ui, key):
    """associate a string to a key (username, comment)"""
    keyid, user, fingerprint = key
    comment = ui.config("gpg", fingerprint, None)
    if comment:
        return "%s (%s)" % (user, comment)
    else:
        return user

@command("sign",
         [('l', 'local', None, _('make the signature local')),
          ('f', 'force', None, _('sign even if the sigfile is modified')),
          ('', 'no-commit', None, _('do not commit the sigfile after signing')),
          ('k', 'key', '',
           _('the key id to sign with'), _('ID')),
          ('m', 'message', '',
           _('commit message'), _('TEXT')),
         ] + commands.commitopts2,
         _('hg sign [OPTION]... [REVISION]...'))
def sign(ui, repo, *revs, **opts):
    """add a signature for the current or given revision

    If no revision is given, the parent of the working directory is used,
    or tip if no revision is checked out.

    See :hg:`help dates` for a list of formats valid for -d/--date.
    """

    mygpg = newgpg(ui, **opts)
    sigver = "0"
    sigmessage = ""

    date = opts.get('date')
    if date:
        opts['date'] = util.parsedate(date)

    if revs:
        nodes = [repo.lookup(n) for n in revs]
    else:
        nodes = [node for node in repo.dirstate.parents()
                 if node != hgnode.nullid]
        if len(nodes) > 1:
            raise util.Abort(_('uncommitted merge - please provide a '
                               'specific revision'))
        if not nodes:
            nodes = [repo.changelog.tip()]

    for n in nodes:
        hexnode = hgnode.hex(n)
        ui.write(_("Signing %d:%s\n") % (repo.changelog.rev(n),
                                         hgnode.short(n)))
        # build data
        data = node2txt(repo, n, sigver)
        sig = mygpg.sign(data)
        if not sig:
            raise util.Abort(_("error while signing"))
        sig = binascii.b2a_base64(sig)
        sig = sig.replace("\n", "")
        sigmessage += "%s %s %s\n" % (hexnode, sigver, sig)

    # write it
    if opts['local']:
        repo.opener.append("localsigs", sigmessage)
        return

    msigs = match.exact(repo.root, '', ['.hgsigs'])
    s = repo.status(match=msigs, unknown=True, ignored=True)[:6]
    if util.any(s) and not opts["force"]:
        raise util.Abort(_("working copy of .hgsigs is changed "
                           "(please commit .hgsigs manually "
                           "or use --force)"))

    sigsfile = repo.wfile(".hgsigs", "ab")
    sigsfile.write(sigmessage)
    sigsfile.close()

    if '.hgsigs' not in repo.dirstate:
        repo[None].add([".hgsigs"])

    if opts["no_commit"]:
        return

    message = opts['message']
    if not message:
        # we don't translate commit messages
        message = "\n".join(["Added signature for changeset %s"
                             % hgnode.short(n)
                             for n in nodes])
    try:
        repo.commit(message, opts['user'], opts['date'], match=msigs)
    except ValueError, inst:
        raise util.Abort(str(inst))

def node2txt(repo, node, ver):
    """map a manifest into some text"""
    if ver == "0":
        return "%s\n" % hgnode.hex(node)
    else:
        raise util.Abort(_("unknown signature version"))