# Copyright 2005 Duke University

# Copyright (C) 2012-2016 Red Hat, Inc.

#

# 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 Library 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.

"""Handle actual output from the cli."""

from __future__ import absolute_import

from __future__ import print_function

from __future__ import unicode_literals

import fnmatch

import hawkey

import itertools

import libdnf.transaction

import logging

import operator

import pwd

import re

import sys

import time

from dnf.cli.format import format_number, format_time

from dnf.i18n import _, C_, P_, ucd, fill_exact_width, textwrap_fill, exact_width, select_short_long

from dnf.pycomp import xrange, basestring, long, unicode, sys_maxsize

from dnf.yum.rpmtrans import TransactionDisplay

from dnf.db.history import MergedTransactionWrapper

import dnf.base

import dnf.callback

import dnf.cli.progress

import dnf.cli.term

import dnf.conf

import dnf.crypto

import dnf.i18n

import dnf.transaction

import dnf.util

import dnf.yum.misc

logger = logging.getLogger('dnf')

def _spread_in_columns(cols_count, label, lst):

    left = itertools.chain((label,), itertools.repeat(''))

    lst_length = len(lst)

    right_count = cols_count - 1

    missing_items = -lst_length % right_count

    if not lst_length:

        lst = itertools.repeat('', right_count)

    elif missing_items:

        lst.extend(('',) * missing_items)

    lst_iter = iter(lst)

    return list(zip(left, *[lst_iter] * right_count))

class Output(object):

    """Main output class for the yum command line."""

    GRP_PACKAGE_INDENT = ' ' * 3

    FILE_PROVIDE_RE = re.compile(r'^\*{0,2}/')

    def __init__(self, base, conf):

        self.conf = conf

        self.base = base

        self.term = dnf.cli.term.Term()

        self.progress = None

    def _banner(self, col_data, row):

        term_width = self.term.columns

        rule = '%s' % '=' * term_width

        header = self.fmtColumns(zip(row, col_data), ' ')

        return rule, header, rule

    def _col_widths(self, rows):

        col_data = [dict() for _ in rows[0]]

        for row in rows:

            for (i, val) in enumerate(row):

                col_dct = col_data[i]

                length = len(val)

                col_dct[length] = col_dct.get(length, 0) + 1

        cols = self.calcColumns(col_data, None, indent='  ')

        # align to the left

        return list(map(operator.neg, cols))

    def _highlight(self, highlight):

        hibeg = ''

        hiend = ''

        if not highlight:

            pass

        elif not isinstance(highlight, basestring) or highlight == 'bold':

            hibeg = self.term.MODE['bold']

        elif highlight == 'normal':

            pass # Minor opt.

        else:

            # Turn a string into a specific output: colour, bold, etc.

            for high in highlight.replace(',', ' ').split():

                if high == 'normal':

                    hibeg = ''

                elif high in self.term.MODE:

                    hibeg += self.term.MODE[high]

                elif high in self.term.FG_COLOR:

                    hibeg += self.term.FG_COLOR[high]

                elif (high.startswith('fg:') and

                      high[3:] in self.term.FG_COLOR):

                    hibeg += self.term.FG_COLOR[high[3:]]

                elif (high.startswith('bg:') and

                      high[3:] in self.term.BG_COLOR):

                    hibeg += self.term.BG_COLOR[high[3:]]

        if hibeg:

            hiend = self.term.MODE['normal']

        return (hibeg, hiend)

    def _sub_highlight(self, haystack, highlight, needles, **kwds):

        hibeg, hiend = self._highlight(highlight)

        return self.term.sub(haystack, hibeg, hiend, needles, **kwds)

    @staticmethod

    def _calc_columns_spaces_helps(current, data_tups, left):

        """ Spaces left on the current field will help how many pkgs? """

        ret = 0

        for tup in data_tups:

            if left < (tup[0] - current):

                break

            ret += tup[1]

        return ret

    @property

    def history(self):

        return self.base.history

    @property

    def sack(self):

        return self.base.sack

    def calcColumns(self, data, columns=None, remainder_column=0,

                    total_width=None, indent=''):

        """Dynamically calculate the widths of the columns that the

        fields in data should be placed into for output.

        :param data: a list of dictionaries that represent the data to

           be output.  Each dictionary in the list corresponds to a

           column of output. The keys of the dictionary are the

           lengths of the items to be output, and the value associated

           with a key is the number of items of that length.

        :param columns: a list containing the minimum amount of space

           that must be allocated for each row. This can be used to

           ensure that there is space available in a column if, for

           example, the actual lengths of the items being output

           cannot be given in *data*

        :param remainder_column: number of the column to receive a few

           extra spaces that may remain after other allocation has

           taken place

        :param total_width: the total width of the output.

           self.term.real_columns is used by default

        :param indent: string that will be prefixed to a line of

           output to create e.g. an indent

        :return: a list of the widths of the columns that the fields

           in data should be placed into for output

        """

        cols = len(data)

        # Convert the data to ascending list of tuples, (field_length, pkgs)

        pdata = data

        data = [None] * cols # Don't modify the passed in data

        for d in range(0, cols):

            data[d] = sorted(pdata[d].items())

        if total_width is None:

            total_width = self.term.real_columns

        #  We start allocating 1 char to everything but the last column, and a

        # space between each (again, except for the last column). Because

        # at worst we are better with:

        # |one two three|

        # | four        |

        # ...than:

        # |one two three|

        # |            f|

        # |our          |

        # ...the later being what we get if we pre-allocate the last column, and

        # thus. the space, due to "three" overflowing it's column by 2 chars.

        if columns is None:

            columns = [1] * (cols - 1)

            columns.append(0)

        # i'm not able to get real terminal width so i'm probably

        # running in non interactive terminal (pipe to grep, redirect to file...)

        # avoid splitting lines to enable filtering output

        if not total_width:

            full_columns = []

            for d in xrange(0, cols):

                col = data[d]

                if col:

                    full_columns.append(col[-1][0])

                else:

                    full_columns.append(columns[d] + 1)

            full_columns[0] += len(indent)

            # if possible, try to keep default width (usually 80 columns)

            default_width = self.term.columns

            if sum(full_columns) > default_width:

                return full_columns

            total_width = default_width

        total_width -= (sum(columns) + (cols - 1) + exact_width(indent))

        if not columns[-1]:

            total_width += 1

        while total_width > 0:

            # Find which field all the spaces left will help best

            helps = 0

            val = 0

            for d in xrange(0, cols):

                thelps = self._calc_columns_spaces_helps(columns[d], data[d],

                                                         total_width)

                if not thelps:

                    continue

                #  We prefer to overflow: the last column, and then earlier

                # columns. This is so that in the best case (just overflow the

                # last) ... grep still "works", and then we make it prettier.

                if helps and (d == (cols - 1)) and (thelps / 2) < helps:

                    continue

                if thelps < helps:

                    continue

                helps = thelps

                val = d

            #  If we found a column to expand, move up to the next level with

            # that column and start again with any remaining space.

            if helps:

                diff = data[val].pop(0)[0] - columns[val]

                if not columns[val] and (val == (cols - 1)):

                    #  If we are going from 0 => N on the last column, take 1

                    # for the space before the column.

                    total_width -= 1

                columns[val] += diff

                total_width -= diff

                continue

            overflowed_columns = 0

            for d in xrange(0, cols):

                if not data[d]:

                    continue

                overflowed_columns += 1

            if overflowed_columns:

                #  Split the remaining spaces among each overflowed column

                # equally

                norm = total_width // overflowed_columns

                for d in xrange(0, cols):

                    if not data[d]:

                        continue

                    columns[d] += norm

                    total_width -= norm

            #  Split the remaining spaces among each column equally, except the

            # last one. And put the rest into the remainder column

            cols -= 1

            norm = total_width // cols

            for d in xrange(0, cols):

                columns[d] += norm

            columns[remainder_column] += total_width - (cols * norm)

            total_width = 0

        return columns

    @staticmethod

    def _fmt_column_align_width(width):

        """Returns tuple of (align_left, width)"""

        if width < 0:

            return (True, -width)

        return (False, width)

    def _col_data(self, col_data):

        assert len(col_data) == 2 or len(col_data) == 3

        if len(col_data) == 2:

            (val, width) = col_data

            hibeg = hiend = ''

        if len(col_data) == 3:

            (val, width, highlight) = col_data

            (hibeg, hiend) = self._highlight(highlight)

        return (ucd(val), width, hibeg, hiend)

    def fmtColumns(self, columns, msg=u'', end=u''):

        """Return a row of data formatted into a string for output.

        Items can overflow their columns.

        :param columns: a list of tuples containing the data to

           output.  Each tuple contains first the item to be output,

           then the amount of space allocated for the column, and then

           optionally a type of highlighting for the item

        :param msg: a string to begin the line of output with

        :param end: a string to end the line of output with

        :return: a row of data formatted into a string for output

        """

        columns = list(columns)

        total_width = len(msg)

        data = []

        for col_data in columns[:-1]:

            (val, width, hibeg, hiend) = self._col_data(col_data)

            if not width: # Don't count this column, invisible text

                msg += u"%s"

                data.append(val)

                continue

            (align_left, width) = self._fmt_column_align_width(width)

            val_width = exact_width(val)

            if val_width <= width:

                #  Don't use fill_exact_width() because it sucks performance

                # wise for 1,000s of rows. Also allows us to use len(), when

                # we can.

                msg += u"%s%s%s%s "

                if align_left:

                    data.extend([hibeg, val, " " * (width - val_width), hiend])

                else:

                    data.extend([hibeg, " " * (width - val_width), val, hiend])

            else:

                msg += u"%s%s%s\n" + " " * (total_width + width + 1)

                data.extend([hibeg, val, hiend])

            total_width += width

            total_width += 1

        (val, width, hibeg, hiend) = self._col_data(columns[-1])

        (align_left, width) = self._fmt_column_align_width(width)

        val = fill_exact_width(val, width, left=align_left,

                              prefix=hibeg, suffix=hiend)

        msg += u"%%s%s" % end

        data.append(val)

        return msg % tuple(data)

    def simpleList(self, pkg, ui_overflow=False, indent='', highlight=False,

                   columns=None):

        """Print a package as a line.

        :param pkg: the package to be printed

        :param ui_overflow: unused

        :param indent: string to be prefixed onto the line to provide

           e.g. an indent

        :param highlight: highlighting options for the name of the

           package

        :param columns: tuple containing the space allocated for each

           column of output.  The columns are the package name, version,

           and repository

        """

        if columns is None:

            columns = (-40, -22, -16) # Old default

        na = '%s%s.%s' % (indent, pkg.name, pkg.arch)

        hi_cols = [highlight, 'normal', 'normal']

        columns = zip((na, pkg.evr, pkg._from_repo), columns, hi_cols)

        print(self.fmtColumns(columns))

    def simpleEnvraList(self, pkg, ui_overflow=False,

                        indent='', highlight=False, columns=None):

        """Print a package as a line, with the package itself in envra

        format so it can be passed to list/install/etc.

        :param pkg: the package to be printed

        :param ui_overflow: unused

        :param indent: string to be prefixed onto the line to provide

           e.g. an indent

        :param highlight: highlighting options for the name of the

           package

        :param columns: tuple containing the space allocated for each

           column of output.  The columns the are the package envra and

           repository

        """

        if columns is None:

            columns = (-63, -16) # Old default

        envra = '%s%s' % (indent, ucd(pkg))

        hi_cols = [highlight, 'normal', 'normal']

        rid = pkg.ui_from_repo

        columns = zip((envra, rid), columns, hi_cols)

        print(self.fmtColumns(columns))

    def simple_name_list(self, pkg):

        """Print a package as a line containing its name."""

        print(ucd(pkg.name))

    def simple_nevra_list(self, pkg):

        """Print a package as a line containing its NEVRA."""

        print(ucd(pkg))

    def fmtKeyValFill(self, key, val):

        """Return a key value pair in the common two column output

        format.

        :param key: the key to be formatted

        :param val: the value associated with *key*

        :return: the key value pair formatted in two columns for output

        """

        keylen = exact_width(key)

        cols = self.term.real_columns

        if not cols:

            cols = sys_maxsize

        elif cols < 20:

            cols = 20

        nxt = ' ' * (keylen - 2) + ': '

        if not val:

            # textwrap.fill in case of empty val returns empty string

            return key

        val = ucd(val)

        ret = textwrap_fill(val, width=cols, initial_indent=key,

                            subsequent_indent=nxt)

        if ret.count("\n") > 1 and keylen > (cols // 3):

            # If it's big, redo it again with a smaller subsequent off

            ret = textwrap_fill(val, width=cols, initial_indent=key,

                                subsequent_indent='     ...: ')

        return ret

    def fmtSection(self, name, fill='='):

        """Format and return a section header.  The format of the

        header is a line with *name* centered, and *fill* repeated on

        either side to fill an entire line on the terminal.

        :param name: the name of the section

        :param fill: the character to repeat on either side of *name*

          to fill an entire line.  *fill* must be a single character.

        :return: a string formatted to be a section header

        """

        name = ucd(name)

        cols = self.term.columns - 2

        name_len = exact_width(name)

        if name_len >= (cols - 4):

            beg = end = fill * 2

        else:

            beg = fill * ((cols - name_len) // 2)

            end = fill * (cols - name_len - len(beg))

        return "%s %s %s" % (beg, name, end)

    def infoOutput(self, pkg, highlight=False):

        """Print information about the given package.

        :param pkg: the package to print information about

        :param highlight: highlighting options for the name of the

           package

        """

        def format_key_val(key, val):

            return " ".join([fill_exact_width(key, 12, 12), ":", str(val)])

        def format_key_val_fill(key, val):

            return self.fmtKeyValFill(fill_exact_width(key, 12, 12) + " : ", val or "")

        output_list = []

        (hibeg, hiend) = self._highlight(highlight)

        # Translators: This is abbreviated 'Name'. Should be no longer

        # than 12 characters. You can use the full version if it is short

        # enough in your language.

        key = select_short_long(12, C_("short", "Name"),

                                    C_("long", "Name"))

        output_list.append(format_key_val(key,

                                          "%s%s%s" % (hibeg, pkg.name, hiend)))

        if pkg.epoch:

            # Translators: This message should be no longer than 12 characters.

            output_list.append(format_key_val(_("Epoch"), pkg.epoch))

        key = select_short_long(12, C_("short", "Version"),

                                    C_("long", "Version"))

        output_list.append(format_key_val(key, pkg.version))

        # Translators: This message should be no longer than 12 characters.

        output_list.append(format_key_val(_("Release"), pkg.release))

        key = select_short_long(12, C_("short", "Arch"),

                                    C_("long", "Architecture"))

        output_list.append(format_key_val(key, pkg.arch))

        key = select_short_long(12, C_("short", "Size"), C_("long", "Size"))

        output_list.append(format_key_val(key,

                                          format_number(float(pkg._size))))

        # Translators: This message should be no longer than 12 characters.

        output_list.append(format_key_val(_("Source"), pkg.sourcerpm))

        key = select_short_long(12, C_("short", "Repo"),

                                    C_("long", "Repository"))

        output_list.append(format_key_val(key, pkg.repoid))

        if pkg._from_system:

            history_repo = self.history.repo(pkg)

            if history_repo:

                # Translators: This message should be no longer than 12 chars.

                output_list.append(format_key_val(_("From repo"), history_repo))

        if self.conf.verbose:

            # :hawkey does not support changelog information

            # print(_("Committer   : %s") % ucd(pkg.committer))

            # print(_("Committime  : %s") % time.ctime(pkg.committime))

            # Translators: This message should be no longer than 12 characters.

            output_list.append(format_key_val(_("Packager"), pkg.packager))

            # Translators: This message should be no longer than 12 characters.

            output_list.append(format_key_val(_("Buildtime"),

                                              dnf.util.normalize_time(pkg.buildtime)))

            if pkg.installtime:

            # Translators: This message should be no longer than 12 characters.

                output_list.append(format_key_val(_("Install time"),

                                                  dnf.util.normalize_time(pkg.installtime)))

            history_pkg = self.history.package_data(pkg)

            if history_pkg:

                try:

                    uid = int(history_pkg._item.getInstalledBy())

                except ValueError: # In case int() fails

                    uid = None

                # Translators: This message should be no longer than 12 chars.

                output_list.append(format_key_val(_("Installed by"), self._pwd_ui_username(uid)))

        # Translators: This is abbreviated 'Summary'. Should be no longer

        # than 12 characters. You can use the full version if it is short

        # enough in your language.

        key = select_short_long(12, C_("short", "Summary"),

                                    C_("long", "Summary"))

        output_list.append(format_key_val_fill(key, pkg.summary))

        if pkg.url:

            output_list.append(format_key_val(_("URL"), ucd(pkg.url)))

        # Translators: This message should be no longer than 12 characters.

        output_list.append(format_key_val_fill(_("License"), pkg.license))

        # Translators: This is abbreviated 'Description'. Should be no longer

        # than 12 characters. You can use the full version if it is short

        # enough in your language.

        key = select_short_long(12, C_("short", "Description"),

                                    C_("long", "Description"))

        output_list.append(format_key_val_fill(key, pkg.description))

        return "\n".join(output_list)

    def updatesObsoletesList(self, uotup, changetype, columns=None):

        """Print a simple string that explains the relationship

        between the members of an update or obsoletes tuple.

        :param uotup: an update or obsoletes tuple.  The first member

           is the new package, and the second member is the old

           package

        :param changetype: a string indicating what the change between

           the packages is, e.g. 'updates' or 'obsoletes'

        :param columns: a tuple containing information about how to

           format the columns of output.  The absolute value of each

           number in the tuple indicates how much space has been

           allocated for the corresponding column.  If the number is

           negative, the text in the column will be left justified,

           and if it is positive, the text will be right justified.

           The columns of output are the package name, version, and repository

        """

        (changePkg, instPkg) = uotup

        if columns is not None:

            # New style, output all info. for both old/new with old indented

            chi = self.conf.color_update_remote

            if changePkg.reponame != hawkey.SYSTEM_REPO_NAME:

                chi = self.conf.color_update_local

            self.simpleList(changePkg, columns=columns, highlight=chi)

            self.simpleList(instPkg, columns=columns, indent=' ' * 4,

                            highlight=self.conf.color_update_installed)

            return

        # Old style

        c_compact = changePkg.compactPrint()

        i_compact = '%s.%s' % (instPkg.name, instPkg.arch)

        c_repo = changePkg.repoid

        print('%-35.35s [%.12s] %.10s %-20.20s' %

              (c_compact, c_repo, changetype, i_compact))

    def listPkgs(self, lst, description, outputType, highlight_na={},

                 columns=None, highlight_modes={}):

        """Prints information about the given list of packages.

        :param lst: a list of packages to print information about

        :param description: string describing what the list of

           packages contains, e.g. 'Available Packages'

        :param outputType: The type of information to be printed.

           Current options::

              'list' - simple pkg list

              'info' - similar to rpm -qi output

              'name' - simple name list

              'nevra' - simple nevra list

        :param highlight_na: a dictionary containing information about

              packages that should be highlighted in the output.  The

              dictionary keys are (name, arch) tuples for the package,

              and the associated values are the package objects

              themselves.

        :param columns: a tuple containing information about how to

           format the columns of output.  The absolute value of each

           number in the tuple indicates how much space has been

           allocated for the corresponding column.  If the number is

           negative, the text in the column will be left justified,

           and if it is positive, the text will be right justified.

           The columns of output are the package name, version, and

           repository

        :param highlight_modes: dictionary containing information

              about to highlight the packages in *highlight_na*.

              *highlight_modes* should contain the following keys::

                 'not_in' - highlighting used for packages not in *highlight_na*

                 '=' - highlighting used when the package versions are equal

                 '<' - highlighting used when the package has a lower version

                       number

                 '>' - highlighting used when the package has a higher version

                       number

        :return: number of packages listed

        """

        if outputType in ['list', 'info', 'name', 'nevra']:

            if len(lst) > 0:

                print('%s' % description)

                info_set = set()

                if outputType == 'list':

                    unique_item_dict = {}

                    for pkg in lst:

                        unique_item_dict[str(pkg) + str(pkg._from_repo)] = pkg

                    lst = unique_item_dict.values()

                for pkg in sorted(lst):

                    key = (pkg.name, pkg.arch)

                    highlight = False

                    if key not in highlight_na:

                        highlight = highlight_modes.get('not in', 'normal')

                    elif pkg.evr_eq(highlight_na[key]):

                        highlight = highlight_modes.get('=', 'normal')

                    elif pkg.evr_lt(highlight_na[key]):

                        highlight = highlight_modes.get('>', 'bold')

                    else:

                        highlight = highlight_modes.get('<', 'normal')

                    if outputType == 'list':

                        self.simpleList(pkg, ui_overflow=True,

                                        highlight=highlight, columns=columns)

                    elif outputType == 'info':

                        info_set.add(self.infoOutput(pkg, highlight=highlight) + "\n")

                    elif outputType == 'name':

                        self.simple_name_list(pkg)

                    elif outputType == 'nevra':

                        self.simple_nevra_list(pkg)

                    else:

                        pass

                if info_set:

                    print("\n".join(sorted(info_set)))

            return len(lst)

    def userconfirm(self, msg=None, defaultyes_msg=None):

        """Get a yes or no from the user, and default to No

        :msg: String for case with [y/N]

        :defaultyes_msg: String for case with [Y/n]

        :return: True if the user selects yes, and False if the user

           selects no

        """

        yui = (ucd(_('y')), ucd(_('yes')))

        nui = (ucd(_('n')), ucd(_('no')))

        aui = yui + nui

        while True:

            if msg is None:

                msg = _('Is this ok [y/N]: ')

            choice = ''

            if self.conf.defaultyes:

                if defaultyes_msg is None:

                    msg = _('Is this ok [Y/n]: ')

                else:

                    msg = defaultyes_msg

            try:

                choice = dnf.i18n.ucd_input(msg)

            except EOFError:

                pass

            except KeyboardInterrupt:

                choice = nui[0]

            choice = ucd(choice).lower()

            if len(choice) == 0:

                choice = yui[0] if self.conf.defaultyes else nui[0]

            if choice in aui:

                break

            # If the English one letter names don't mix with the translated

            # letters, allow them too:

            if u'y' == choice and u'y' not in aui:

                choice = yui[0]

                break

            if u'n' == choice and u'n' not in aui:

                choice = nui[0]

                break

        if choice in yui:

            return True

        return False

    def _pkgs2name_dict(self, sections):

        installed = self.sack.query().installed()._name_dict()

        available = self.sack.query().available()._name_dict()

        d = {}

        for pkg_name in itertools.chain(*list(zip(*sections))[1]):

            if pkg_name in installed:

                d[pkg_name] = installed[pkg_name][0]

            elif pkg_name in available:

                d[pkg_name] = available[pkg_name][0]

        return d

    def _pkgs2col_lengths(self, sections, name_dict):

        nevra_lengths = {}

        repo_lengths = {}

        for pkg_name in itertools.chain(*list(zip(*sections))[1]):

            pkg = name_dict.get(pkg_name)

            if pkg is None:

                continue

            nevra_l = exact_width(ucd(pkg)) + exact_width(self.GRP_PACKAGE_INDENT)

            repo_l = exact_width(ucd(pkg.reponame))

            nevra_lengths[nevra_l] = nevra_lengths.get(nevra_l, 0) + 1

            repo_lengths[repo_l] = repo_lengths.get(repo_l, 0) + 1

        return (nevra_lengths, repo_lengths)

    def _display_packages(self, pkg_names):

        for name in pkg_names:

            print('%s%s' % (self.GRP_PACKAGE_INDENT, name))

    def _display_packages_verbose(self, pkg_names, name_dict, columns):

        for name in pkg_names:

            try:

                pkg = name_dict[name]

            except KeyError:

                # package not in any repo -> print only package name

                print('%s%s' % (self.GRP_PACKAGE_INDENT, name))

                continue

            highlight = False

            if not pkg._from_system:

                highlight = self.conf.color_list_available_install

            self.simpleEnvraList(pkg, ui_overflow=True,

                                 indent=self.GRP_PACKAGE_INDENT,

                                 highlight=highlight,

                                 columns=columns)

    def display_pkgs_in_groups(self, group):

        """Output information about the packages in a given group

        :param group: a Group object to output information about

        """

        def names(packages):

            return sorted(pkg.name for pkg in packages)

        print('\n' + _('Group: %s') % group.ui_name)

        verbose = self.conf.verbose

        if verbose:

            print(_(' Group-Id: %s') % ucd(group.id))

        if group.ui_description:

            print(_(' Description: %s') % ucd(group.ui_description) or "")

        if group.lang_only:

            print(_(' Language: %s') % group.lang_only)

        sections = (

            (_(' Mandatory Packages:'), names(group.mandatory_packages)),

            (_(' Default Packages:'), names(group.default_packages)),

            (_(' Optional Packages:'), names(group.optional_packages)),

            (_(' Conditional Packages:'), names(group.conditional_packages)))

        if verbose:

            name_dict = self._pkgs2name_dict(sections)

            col_lengths = self._pkgs2col_lengths(sections, name_dict)

            columns = self.calcColumns(col_lengths)

            columns = (-columns[0], -columns[1])

            for (section_name, packages) in sections:

                if len(packages) < 1:

                    continue

                print(section_name)

                self._display_packages_verbose(packages, name_dict, columns)

        else:

            for (section_name, packages) in sections:

                if len(packages) < 1:

                    continue

                print(section_name)

                self._display_packages(packages)

    def display_groups_in_environment(self, environment):

        """Output information about the packages in a given environment

        :param environment: an Environment object to output information about

        """

        def names(groups):

            return sorted(group.name for group in groups)

        print(_('Environment Group: %s') % environment.ui_name)

        if self.conf.verbose:

            print(_(' Environment-Id: %s') % ucd(environment.id))

        if environment.ui_description:

            description = ucd(environment.ui_description) or ""

            print(_(' Description: %s') % description)

        sections = (

            (_(' Mandatory Groups:'), names(environment.mandatory_groups)),

            (_(' Optional Groups:'), names(environment.optional_groups)))

        for (section_name, packages) in sections:

            if len(packages) < 1:

                continue

            print(section_name)

            self._display_packages(packages)

    def matchcallback(self, po, values, matchfor=None, verbose=None,

                      highlight=None):

        """Output search/provides type callback matches.

        :param po: the package object that matched the search

        :param values: the information associated with *po* that

           matched the search

        :param matchfor: a list of strings to be highlighted in the

           output

        :param verbose: whether to output extra verbose information

        :param highlight: highlighting options for the highlighted matches

        """

        def print_highlighted_key_item(key, item, printed_headline, can_overflow=False):

            if not printed_headline:

                print(_('Matched from:'))

            item = ucd(item) or ""

            if item == "":

                return

            if matchfor:

                item = self._sub_highlight(item, highlight, matchfor, ignore_case=True)

            if can_overflow:

                print(self.fmtKeyValFill(key, item))

            else:

                print(key % item)

        def print_file_provides(item, printed_match):

            if not self.FILE_PROVIDE_RE.match(item):

                return False

            key = _("Filename    : %s")

            file_match = False

            for filename in po.files:

                if fnmatch.fnmatch(filename, item):

                    print_highlighted_key_item(

                        key, filename, file_match or printed_match, can_overflow=False)

                    file_match = True

            return file_match

        if self.conf.showdupesfromrepos:

            msg = '%s : ' % po

        else:

            msg = '%s.%s : ' % (po.name, po.arch)

        msg = self.fmtKeyValFill(msg, po.summary or "")

        if matchfor:

            if highlight is None:

                highlight = self.conf.color_search_match

            msg = self._sub_highlight(msg, highlight, matchfor, ignore_case=True)

        print(msg)

        if verbose is None:

            verbose = self.conf.verbose

        if not verbose:

            return

        print(_("Repo        : %s") % po.ui_from_repo)

        printed_match = False

        name_match = False

        for item in set(values):

            if po.summary == item:

                name_match = True

                continue # Skip double name/summary printing

            if po.description == item:

                key = _("Description : ")

                print_highlighted_key_item(key, item, printed_match, can_overflow=True)

                printed_match = True

            elif po.url == item:

                key = _("URL         : %s")

                print_highlighted_key_item(key, item, printed_match, can_overflow=False)

                printed_match = True

            elif po.license == item:

                key = _("License     : %s")

                print_highlighted_key_item(key, item, printed_match, can_overflow=False)

                printed_match = True

            elif print_file_provides(item, printed_match):

                printed_match = True

            else:

                key = _("Provide    : %s")

                for provide in po.provides:

                    provide = str(provide)

                    if fnmatch.fnmatch(provide, item):

                        print_highlighted_key_item(key, provide, printed_match, can_overflow=False)

                        printed_match = True

                    else:

                        first_provide = provide.split()[0]

                        possible = set('=<>')

                        if any((char in possible) for char in item):