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# vim: set fileencoding=utf-8 :
#
# (C) 2006,2007,2010-2012 Guido Guenther <agx@sigxcpu.org>
#    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
"""handles command line and config file option parsing for the gbp commands"""

from optparse import OptionParser, OptionGroup, Option, OptionValueError
from ConfigParser import SafeConfigParser, NoSectionError
from copy import copy
import os.path
try:
    from gbp.version import gbp_version
except ImportError:
    gbp_version = "[Unknown version]"
import gbp.tristate

no_upstream_branch_msg = """
Repository does not have branch '%s' for upstream sources. If there is none see
file:///usr/share/doc/git-buildpackage/manual-html/gbp.import.html#GBP.IMPORT.CONVERT
on howto create it otherwise use --upstream-branch to specify it.
"""

def expand_path(option, opt, value):
    value = os.path.expandvars(value)
    return os.path.expanduser(value)

def check_tristate(option, opt, value):
    try:
        val = gbp.tristate.Tristate(value)
    except TypeError:
        raise OptionValueError(
            "option %s: invalid value: %r" % (opt, value))
    else:
        return val

class GbpOption(Option):
    TYPES = Option.TYPES + ('path', 'tristate')
    TYPE_CHECKER = copy(Option.TYPE_CHECKER)
    TYPE_CHECKER['path'] = expand_path
    TYPE_CHECKER['tristate'] = check_tristate

class GbpOptionParser(OptionParser):
    """
    Handles commandline options and parsing of config files
    @ivar command: the gbp command we store the options for
    @type command: string
    @ivar prefix: prefix to prepend to all commandline options
    @type prefix: string
    @ivar config: current configuration parameters
    @type config: dict
    @cvar defaults: defaults value of an option if not in the config file or
    given on the command line
    @type defaults: dict
    @cvar help: help messages
    @type help: dict
    @cvar def_config_files: list of default config files we parse
    @type def_config_files: list
    """
    defaults = { 'debian-branch'   : 'master',
                 'upstream-branch' : 'upstream',
                 'upstream-tree'   : 'TAG',
                 'pristine-tar'    : 'False',
                 'pristine-tar-commit': 'False',
                 'filter-pristine-tar' : 'False',
                 'sign-tags'       : 'False',
                 'force-create'    : 'False',
                 'no-create-orig'  : 'False',
                 'keyid'           : '',
                 'posttag'         : '',
                 'postbuild'       : '',
                 'prebuild'        : '',
                 'postexport'      : '',
                 'postimport'      : '',
                 'debian-tag'      : 'debian/%(version)s',
                 'upstream-tag'    : 'upstream/%(version)s',
                 'import-msg'      : 'Imported Upstream version %(version)s',
                 'commit-msg'      : 'Update changelog for %(version)s release',
                 'filter'          : [],
                 'snapshot-number' : 'snapshot + 1',
                 'git-log'         : '--no-merges',
                 'export'          : 'HEAD',
                 'export-dir'      : '',
                 'overlay'         : 'False',
                 'tarball-dir'     : '',
                 'ignore-new'      : 'False',
                 'ignore-branch'   : 'False',
                 'meta'            : 'False',
                 'meta-closes'     : 'Closes|LP',
                 'full'            : 'False',
                 'id-length'       : '0',
                 'git-author'      : 'False',
                 'ignore-regex'    : '',
                 'compression'     : 'auto',
                 'compression-level': '9',
                 'remote-url-pattern' : 'ssh://git.debian.org/git/collab-maint/%(pkg)s.git',
                 'multimaint'      : 'True',
                 'multimaint-merge': 'False',
                 'pbuilder'        : 'False',
                 'qemubuilder'     : 'False',
                 'dist'            : 'sid',
                 'arch'            : '',
                 'interactive'     : 'True',
                 'color'           : 'auto',
                 'customizations'  : '',
                 'spawn-editor'    : 'release',
                 'patch-numbers'   : 'True',
                 'notify'          : 'auto',
                 'merge'           : 'True',
                 'track'           : 'True',
                 'author-is-committer': 'False',
                 'author-date-is-committer-date': 'False',
                 'create-missing-branches': 'False',
                 'submodules'      : 'False',
                 'time-machine'    : 1,
                 'pbuilder-autoconf' : 'True',
                 'pbuilder-options': '',
                 'template-dir': '',
                 'remote-config': '',
                 'allow-unauthenticated': 'False',
             }
    help = {
             'debian-branch':
                  "branch the Debian package is being developed on, default is '%(debian-branch)s'",
             'upstream-branch':
                  "upstream branch, default is '%(upstream-branch)s'",
             'upstream-tree':
                  "where to generate the upstream tarball from (tag or branch), default is '%(upstream-tree)s'",
             'debian-tag':
                  "format string for debian tags, default is '%(debian-tag)s'",
             'upstream-tag':
                  "format string for upstream tags, default is '%(upstream-tag)s'",
             'sign-tags':
                  "sign tags, default is '%(sign-tags)s'",
             'keyid':
                  "GPG keyid to sign tags with, default is '%(keyid)s'",
             'import-msg':
                  "format string for git-import-orig commit message, default is '%(import-msg)s'",
             'commit-msg':
                  "format string for git-dch commit message, default is '%(commit-msg)s'",
             'pristine-tar':
                  "use pristine-tar to create orig tarball, default is '%(pristine-tar)s'",
             'pristine-tar-commit':
                  "When generating a tarball commit it to the pristine-tar branch '%(pristine-tar-commit)s'",
             'filter-pristine-tar':
                  "Filter pristine-tar when filter option is used, default is '%(filter-pristine-tar)s'",
             'filter':
                  "files to filter out during import (can be given multiple times), default is %(filter)s",
             'git-author':
                  "use name and email from git-config for changelog trailer, default is '%(git-author)s'",
             'full':
                  "include the full commit message instead of only the first line, default is '%(full)s'",
             'meta':
                  "parse meta tags in commit messages, default is '%(meta)s'",
             'ignore-new':
                  "build with uncommited changes in the source tree, default is '%(ignore-new)s'",
             'ignore-branch':
                  "build although debian-branch != current branch, default is '%(ignore-branch)s'",
             'overlay':
                  "extract orig tarball when using export-dir option, default is '%(overlay)s'",
             'remote-url-pattern':
                  "Remote url pattern to create the repo at, default is '%(remote-url-pattern)s'",
             'multimaint':
                  "Note multiple maintainers, default is '%(multimaint)s'",
             'multimaint-merge':
                  "Merge commits by maintainer, default is '%(multimaint-merge)s'",
             'pbuilder':
                  "Invoke git-pbuilder for building, default is '%(pbuilder)s'",
             'dist':
                  "Build for this distribution when using git-pbuilder, default is '%(dist)s'",
             'arch':
                  "Build for this architecture when using git-pbuilder, default is '%(arch)s'",
             'qemubuilder':
                  "Invoke git-pbuilder with qemubuilder for building, default is '%(qemubuilder)s'",
             'interactive':
                  "Run command interactive, default is '%(interactive)s'",
             'color':
                  "color output, default is '%(color)s'",
             'spawn-editor':
                  "Whether to spawn an editor after adding the changelog entry, default is '%(spawn-editor)s'",
             'patch-numbers':
                  "Whether to number patch files, default is %(patch-numbers)s",
             'notify':
                  "Whether to send a desktop notification after the build, default is '%(notify)s'",
             'merge':
                  "after the import merge the result to the debian branch, default is '%(merge)s'",
             'track':
                  "set up tracking for remote branches, default is '%(track)s'",
             'author-is-committer':
                  "Use the authors's name also as the comitter's name, default is '%(author-is-committer)s'",
             'author-date-is-committer-date':
                  "Use the authors's date as the comitter's date, default is '%(author-date-is-committer-date)s'",
             'create-missing-branches':
                  "Create missing branches automatically, default is '%(create-missing-branches)s'",
             'submodules':
                  "Transparently handle submodules in the upstream tree, default is '%(submodules)s'",
             'postimport':
                  "hook run after a successful import, default is '%(postimport)s'",
             'time-machine':
                  ("don't try head commit only to apply the patch queue but look TIME_MACHINE commits back. "
                   "Default is '%(time-machine)d'"),
             'pbuilder-autoconf':
                  "Wheter to configure pbuilder automatically. Default is '%(pbuilder-autoconf)s'",
             'pbuilder-options':
                  "Options to pass to pbuilder, default is '%(pbuilder-options)s'",
             'template-dir':
                  "Template directory used by git init, default is '%(template-dir)s'",
             'remote-config':
                  "Remote defintion in gbp.conf used to create the remote repository",
             'allow-unauthenticated':
                  "Don't verify integrity of downloaded source",
           }

    def_config_files = [ '/etc/git-buildpackage/gbp.conf',
                         '~/.gbp.conf',
                         '.gbp.conf',
                         'debian/gbp.conf',
                         '.git/gbp.conf' ]

    @classmethod
    def get_config_files(klass):
        """
        Get list of config files from the I{GBP_CONF_FILES} environment
        variable.

        @return: list of config files we need to parse
        @rtype: C{list}

        >>> if os.environ.has_key('GBP_CONF_FILES'): del os.environ['GBP_CONF_FILES']
        >>> files = GbpOptionParser.get_config_files()

        # Remove the ~-expanded one
        >>> del files[1]
        >>> files
        ['/etc/git-buildpackage/gbp.conf', '.gbp.conf', 'debian/gbp.conf', '.git/gbp.conf']

        >>> os.environ['GBP_CONF_FILES'] = 'test1:test2'
        >>> GbpOptionParser.get_config_files()
        ['test1', 'test2']
        """
        envvar = os.environ.get('GBP_CONF_FILES')
        files = envvar.split(':') if envvar else klass.def_config_files
        return [ os.path.expanduser(f) for f in files ]

    def _parse_config_files(self):
        """
        Parse the possible config files and set appropriate values
        default values
        """
        parser = SafeConfigParser(self.defaults)
        parser.read(self.config_files)
        self.config = dict(parser.defaults())

        if parser.has_section(self.command):
            self.config.update(dict(parser.items(self.command, raw=True)))

        for section in self.sections:
            if parser.has_section(section):
                self.config.update(dict(parser.items(section, raw=True)))
            else:
                raise NoSectionError("Mandatory section [%s] does not exist."
                                     % section)

        # filter can be either a list or a string, always build a list:
        if self.config['filter']:
            if self.config['filter'].startswith('['):
                self.config['filter'] = eval(self.config['filter'])
            else:
                self.config['filter'] = [ self.config['filter'] ]
        else:
            self.config['filter'] = []

    def __init__(self, command, prefix='', usage=None, sections=[]):
        """
        @param command: the command to build the config parser for
        @type command: C{str}
        @param prefix: A prefix to add to all command line options
        @type prefix: C{str}
        @param usage: a usage description
        @type usage: C{str}
        @param sections: additional (non optional) config file sections
            to parse
        @type sections: C{list} of C{str}
        """
        self.command = command
        self.sections = sections
        self.prefix = prefix
        self.config = {}
        self.config_files = self.get_config_files()
        self._parse_config_files()
        OptionParser.__init__(self, option_class=GbpOption,
                              usage=usage, version='%s %s' % (self.command,
                                                              gbp_version))

    def _is_boolean(self, dummy, *unused, **kwargs):
        """is option_name a boolean option"""
        ret = False
        try:
            if kwargs['action'] in [ 'store_true', 'store_false' ]:
                ret=True
        except KeyError:
            ret=False
        return ret

    def _get_bool_default(self, option_name):
        """
        get default for boolean options
        this way we can handle no-foo=True and foo=False
        """
        if option_name.startswith('no-'):
            pos = option_name[3:]
            neg = option_name
        else:
            pos = option_name
            neg = "no-%s" % option_name

        try:
            default = self.config[pos]
        except KeyError:
            default = self.config[neg]

        if default.lower() in ["true",  "1" ]:
            val = 'True'
        elif default.lower() in ["false", "0" ]:
            val = 'False'
        else:
            raise ValueError, "Boolean options must be True or False"
        return eval(val)

    def get_default(self, option_name, **kwargs):
        """get the default value"""
        if self._is_boolean(self, option_name, **kwargs):
            default = self._get_bool_default(option_name)
        else:
            default = self.config[option_name]
        return default

    def add_config_file_option(self, option_name, dest, help=None, **kwargs):
        """
        set a option for the command line parser, the default is read from the config file
        @param option_name: name of the option
        @type option_name: string
        @param dest: where to store this option
        @type dest: string
        @param help: help text
        @type help: string
        """
        if not help:
            help = self.help[option_name]
        OptionParser.add_option(self, "--%s%s" % (self.prefix, option_name), dest=dest,
                                default=self.get_default(option_name, **kwargs),
                                help=help % self.config, **kwargs)

    def add_boolean_config_file_option(self, option_name, dest):
        self.add_config_file_option(option_name=option_name, dest=dest, action="store_true")
        neg_help = "negates '--%s%s'" % (self.prefix, option_name)
        self.add_config_file_option(option_name="no-%s" % option_name, dest=dest, help=neg_help, action="store_false")


class GbpOptionGroup(OptionGroup):
    def add_config_file_option(self, option_name, dest, help=None, **kwargs):
        """
        set a option for the command line parser, the default is read from the config file
        @param option_name: name of the option
        @type option_name: string
        @param dest: where to store this option
        @type dest: string
        @param help: help text
        @type help: string
        """
        if not help:
            help = self.parser.help[option_name]
        OptionGroup.add_option(self, "--%s%s" % (self.parser.prefix, option_name), dest=dest,
                                default=self.parser.get_default(option_name, **kwargs),
                                help=help % self.parser.config, **kwargs)

    def add_boolean_config_file_option(self, option_name, dest):
        self.add_config_file_option(option_name=option_name, dest=dest, action="store_true")
        neg_help = "negates '--%s%s'" % (self.parser.prefix, option_name)
        self.add_config_file_option(option_name="no-%s" % option_name, dest=dest, help=neg_help, action="store_false")


class GbpOptionParserDebian(GbpOptionParser):
    """
    Handles commandline options and parsing of config files for Debian tools
    """
    defaults = dict(GbpOptionParser.defaults)
    defaults.update( {
                       'builder'            : 'debuild -i -I',
                       'cleaner'            : 'debuild -d clean',
                     } )

# vim:et:ts=4:sw=4:et:sts=4:ai:set list listchars=tab\:»·,trail\:·: