# monotone.py - monotone support for the convert extension

#

#  Copyright 2008, 2009 Mikkel Fahnoe Jorgensen <mikkel@dvide.com> and

#  others

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

import os, re

from mercurial import util

from common import NoRepo, commit, converter_source, checktool

from common import commandline

from mercurial.i18n import _

class monotone_source(converter_source, commandline):

    def __init__(self, ui, path=None, rev=None):

        converter_source.__init__(self, ui, path, rev)

        commandline.__init__(self, ui, 'mtn')

        self.ui = ui

        self.path = path

        self.automatestdio = False

        self.rev = rev

        norepo = NoRepo(_("%s does not look like a monotone repository")

                        % path)

        if not os.path.exists(os.path.join(path, '_MTN')):

            # Could be a monotone repository (SQLite db file)

            try:

                header = file(path, 'rb').read(16)

            except:

                header = ''

            if header != 'SQLite format 3\x00':

                raise norepo

        # regular expressions for parsing monotone output

        space    = r'\s*'

        name     = r'\s+"((?:\\"|[^"])*)"\s*'

        value    = name

        revision = r'\s+\[(\w+)\]\s*'

        lines    = r'(?:.|\n)+'

        self.dir_re      = re.compile(space + "dir" + name)

        self.file_re     = re.compile(space + "file" + name +

                                      "content" + revision)

        self.add_file_re = re.compile(space + "add_file" + name +

                                      "content" + revision)

        self.patch_re    = re.compile(space + "patch" + name +

                                      "from" + revision + "to" + revision)

        self.rename_re   = re.compile(space + "rename" + name + "to" + name)

        self.delete_re   = re.compile(space + "delete" + name)

        self.tag_re      = re.compile(space + "tag" + name + "revision" +

                                      revision)

        self.cert_re     = re.compile(lines + space + "name" + name +

                                      "value" + value)

        attr = space + "file" + lines + space + "attr" + space

        self.attr_execute_re = re.compile(attr  + '"mtn:execute"' +

                                          space + '"true"')

        # cached data

        self.manifest_rev = None

        self.manifest = None

        self.files = None

        self.dirs  = None

        checktool('mtn', abort=False)

    def mtnrun(self, *args, **kwargs):

        if self.automatestdio:

            return self.mtnrunstdio(*args, **kwargs)

        else:

            return self.mtnrunsingle(*args, **kwargs)

    def mtnrunsingle(self, *args, **kwargs):

        kwargs['d'] = self.path

        return self.run0('automate', *args, **kwargs)

    def mtnrunstdio(self, *args, **kwargs):

        # Prepare the command in automate stdio format

        command = []

        for k, v in kwargs.iteritems():

            command.append("%s:%s" % (len(k), k))

            if v:

                command.append("%s:%s" % (len(v), v))

        if command:

            command.insert(0, 'o')

            command.append('e')

        command.append('l')

        for arg in args:

            command += "%s:%s" % (len(arg), arg)

        command.append('e')

        command = ''.join(command)

        self.ui.debug("mtn: sending '%s'\n" % command)

        self.mtnwritefp.write(command)

        self.mtnwritefp.flush()

        return self.mtnstdioreadcommandoutput(command)

    def mtnstdioreadpacket(self):

        read = None

        commandnbr = ''

        while read != ':':

            read = self.mtnreadfp.read(1)

            if not read:

                raise util.Abort(_('bad mtn packet - no end of commandnbr'))

            commandnbr += read

        commandnbr = commandnbr[:-1]

        stream = self.mtnreadfp.read(1)

        if stream not in 'mewptl':

            raise util.Abort(_('bad mtn packet - bad stream type %s' % stream))

        read = self.mtnreadfp.read(1)

        if read != ':':

            raise util.Abort(_('bad mtn packet - no divider before size'))

        read = None

        lengthstr = ''

        while read != ':':

            read = self.mtnreadfp.read(1)

            if not read:

                raise util.Abort(_('bad mtn packet - no end of packet size'))

            lengthstr += read

        try:

            length = long(lengthstr[:-1])

        except TypeError:

            raise util.Abort(_('bad mtn packet - bad packet size %s')

                % lengthstr)

        read = self.mtnreadfp.read(length)

        if len(read) != length:

            raise util.Abort(_("bad mtn packet - unable to read full packet "

                "read %s of %s") % (len(read), length))

        return (commandnbr, stream, length, read)

    def mtnstdioreadcommandoutput(self, command):

        retval = []

        while True:

            commandnbr, stream, length, output = self.mtnstdioreadpacket()

            self.ui.debug('mtn: read packet %s:%s:%s\n' %

                (commandnbr, stream, length))

            if stream == 'l':

                # End of command

                if output != '0':

                    raise util.Abort(_("mtn command '%s' returned %s") %

                        (command, output))

                break

            elif stream in 'ew':

                # Error, warning output

                self.ui.warn(_('%s error:\n') % self.command)

                self.ui.warn(output)

            elif stream == 'p':

                # Progress messages

                self.ui.debug('mtn: ' + output)

            elif stream == 'm':

                # Main stream - command output

                retval.append(output)

        return ''.join(retval)

    def mtnloadmanifest(self, rev):

        if self.manifest_rev == rev:

            return

        self.manifest = self.mtnrun("get_manifest_of", rev).split("\n\n")

        self.manifest_rev = rev

        self.files = {}

        self.dirs = {}

        for e in self.manifest:

            m = self.file_re.match(e)

            if m:

                attr = ""

                name = m.group(1)

                node = m.group(2)

                if self.attr_execute_re.match(e):

                    attr += "x"

                self.files[name] = (node, attr)

            m = self.dir_re.match(e)

            if m:

                self.dirs[m.group(1)] = True

    def mtnisfile(self, name, rev):

        # a non-file could be a directory or a deleted or renamed file

        self.mtnloadmanifest(rev)

        return name in self.files

    def mtnisdir(self, name, rev):

        self.mtnloadmanifest(rev)

        return name in self.dirs

    def mtngetcerts(self, rev):

        certs = {"author":"<missing>", "date":"<missing>",

            "changelog":"<missing>", "branch":"<missing>"}

        certlist = self.mtnrun("certs", rev)

        # mtn < 0.45:

        #   key "test@selenic.com"

        # mtn >= 0.45:

        #   key [ff58a7ffb771907c4ff68995eada1c4da068d328]

        certlist = re.split('\n\n      key ["\[]', certlist)

        for e in certlist:

            m = self.cert_re.match(e)

            if m:

                name, value = m.groups()

                value = value.replace(r'\"', '"')

                value = value.replace(r'\\', '\\')

                certs[name] = value

        # Monotone may have subsecond dates: 2005-02-05T09:39:12.364306

        # and all times are stored in UTC

        certs["date"] = certs["date"].split('.')[0] + " UTC"

        return certs

    # implement the converter_source interface:

    def getheads(self):

        if not self.rev:

            return self.mtnrun("leaves").splitlines()

        else:

            return [self.rev]

    def getchanges(self, rev):

        #revision = self.mtncmd("get_revision %s" % rev).split("\n\n")

        revision = self.mtnrun("get_revision", rev).split("\n\n")

        files = {}

        ignoremove = {}

        renameddirs = []

        copies = {}

        for e in revision:

            m = self.add_file_re.match(e)

            if m:

                files[m.group(1)] = rev

                ignoremove[m.group(1)] = rev

            m = self.patch_re.match(e)

            if m:

                files[m.group(1)] = rev

            # Delete/rename is handled later when the convert engine

            # discovers an IOError exception from getfile,

            # but only if we add the "from" file to the list of changes.

            m = self.delete_re.match(e)

            if m:

                files[m.group(1)] = rev

            m = self.rename_re.match(e)

            if m:

                toname = m.group(2)

                fromname = m.group(1)

                if self.mtnisfile(toname, rev):

                    ignoremove[toname] = 1

                    copies[toname] = fromname

                    files[toname] = rev

                    files[fromname] = rev

                elif self.mtnisdir(toname, rev):

                    renameddirs.append((fromname, toname))

        # Directory renames can be handled only once we have recorded

        # all new files

        for fromdir, todir in renameddirs:

            renamed = {}

            for tofile in self.files:

                if tofile in ignoremove:

                    continue

                if tofile.startswith(todir + '/'):

                    renamed[tofile] = fromdir + tofile[len(todir):]

                    # Avoid chained moves like:

                    # d1(/a) => d3/d1(/a)

                    # d2 => d3

                    ignoremove[tofile] = 1

            for tofile, fromfile in renamed.items():

                self.ui.debug (_("copying file in renamed directory "

                                 "from '%s' to '%s'")

                               % (fromfile, tofile), '\n')

                files[tofile] = rev

                copies[tofile] = fromfile

            for fromfile in renamed.values():

                files[fromfile] = rev

        return (files.items(), copies)

    def getfile(self, name, rev):

        if not self.mtnisfile(name, rev):

            raise IOError() # file was deleted or renamed

        try:

            data = self.mtnrun("get_file_of", name, r=rev)

        except:

            raise IOError() # file was deleted or renamed

        self.mtnloadmanifest(rev)

        node, attr = self.files.get(name, (None, ""))

        return data, attr

    def getcommit(self, rev):

        extra = {}

        certs = self.mtngetcerts(rev)

        if certs.get('suspend') == certs["branch"]:

            extra['close'] = '1'

        return commit(

            author=certs["author"],

            date=util.datestr(util.strdate(certs["date"], "%Y-%m-%dT%H:%M:%S")),

            desc=certs["changelog"],

            rev=rev,

            parents=self.mtnrun("parents", rev).splitlines(),

            branch=certs["branch"],

            extra=extra)

    def gettags(self):

        tags = {}

        for e in self.mtnrun("tags").split("\n\n"):

            m = self.tag_re.match(e)

            if m:

                tags[m.group(1)] = m.group(2)

        return tags

    def getchangedfiles(self, rev, i):

        # This function is only needed to support --filemap

        # ... and we don't support that

        raise NotImplementedError()

    def before(self):

        # Check if we have a new enough version to use automate stdio

        version = 0.0

        try:

            versionstr = self.mtnrunsingle("interface_version")

            version = float(versionstr)

        except Exception:

            raise util.Abort(_("unable to determine mtn automate interface "

                "version"))

        if version >= 12.0:

            self.automatestdio = True

            self.ui.debug("mtn automate version %s - using automate stdio\n" %

                version)

            # launch the long-running automate stdio process

            self.mtnwritefp, self.mtnreadfp = self._run2('automate', 'stdio',

                '-d', self.path)

            # read the headers

            read = self.mtnreadfp.readline()

            if read != 'format-version: 2\n':

                raise util.Abort(_('mtn automate stdio header unexpected: %s')

                    % read)

            while read != '\n':

                read = self.mtnreadfp.readline()

                if not read:

                    raise util.Abort(_("failed to reach end of mtn automate "

                        "stdio headers"))

        else:

            self.ui.debug("mtn automate version %s - not using automate stdio "

                "(automate >= 12.0 - mtn >= 0.46 is needed)\n" % version)

    def after(self):

        if self.automatestdio:

            self.mtnwritefp.close()

            self.mtnwritefp = None

            self.mtnreadfp.close()

            self.mtnreadfp = None