/brz/remove-bazaar

# Copyright (C) 2007 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""A generator which creates a template-based output from the current

   tree info."""

from __future__ import absolute_import

import codecs

from breezy import errors

from breezy.revision import (

    NULL_REVISION,

    )

from breezy.lazy_regex import lazy_compile

from breezy.version_info_formats import (

    create_date_str,

    VersionInfoBuilder,

    )

class MissingTemplateVariable(errors.BzrError):

    _fmt = 'Variable {%(name)s} is not available.'

    def __init__(self, name):

        self.name = name

class NoTemplate(errors.BzrError):

    _fmt = 'No template specified.'

class Template(object):

    """A simple template engine.

    >>> t = Template()

    >>> t.add('test', 'xxx')

    >>> print(list(t.process('{test}')))

    ['xxx']

    >>> print(list(t.process('{test} test')))

    ['xxx', ' test']

    >>> print(list(t.process('test {test}')))

    ['test ', 'xxx']

    >>> print(list(t.process('test {test} test')))

    ['test ', 'xxx', ' test']

    >>> print(list(t.process('{test}\\\\n')))

    ['xxx', '\\n']

    >>> print(list(t.process('{test}\\n')))

    ['xxx', '\\n']

    """

    _tag_re = lazy_compile('{(\\w+)}')

    def __init__(self):

        self._data = {}

    def add(self, name, value):

        self._data[name] = value

    def process(self, tpl):

        unicode_escape = codecs.getdecoder("unicode_escape")

        tpl = unicode_escape(tpl)[0]

        pos = 0

        while True:

            match = self._tag_re.search(tpl, pos)

            if not match:

                if pos < len(tpl):

                    yield tpl[pos:]

                break

            start, end = match.span()

            if start > 0:

                yield tpl[pos:start]

            pos = end

            name = match.group(1)

            try:

                data = self._data[name]

            except KeyError:

                raise MissingTemplateVariable(name)

            if not isinstance(data, str):

                data = str(data)

            yield data

class CustomVersionInfoBuilder(VersionInfoBuilder):

    """Create a version file based on a custom template."""

    def generate(self, to_file):

        if self._template is None:

            raise NoTemplate()

        info = Template()

        info.add('build_date', create_date_str())

        info.add('branch_nick', self._branch.nick)

        revision_id = self._get_revision_id()

        if revision_id == NULL_REVISION:

            info.add('revno', 0)

        else:

            try:

                info.add('revno', self._get_revno_str(revision_id))

            except errors.GhostRevisionsHaveNoRevno:

                pass

            info.add('revision_id', revision_id.decode('utf-8'))

            rev = self._branch.repository.get_revision(revision_id)

            info.add('date', create_date_str(rev.timestamp, rev.timezone))

        if self._check:

            self._extract_file_revisions()

        if self._check:

            if self._clean:

                info.add('clean', 1)

            else:

                info.add('clean', 0)

        to_file.writelines(info.process(self._template))