# ui.py - user interface bits for mercurial

#

# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>

#

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

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

from __future__ import absolute_import

import atexit

import collections

import contextlib

import errno

import getpass

import inspect

import os

import re

import signal

import socket

import subprocess

import sys

import tempfile

import traceback

from .i18n import _

from .node import hex

from . import (

    color,

    config,

    encoding,

    error,

    formatter,

    progress,

    pycompat,

    scmutil,

    util,

)

urlreq = util.urlreq

# for use with str.translate(None, _keepalnum), to keep just alphanumerics

_keepalnum = ''.join(c for c in map(pycompat.bytechr, range(256))

                     if not c.isalnum())

samplehgrcs = {

    'user':

"""# example user config (see 'hg help config' for more info)

[ui]

# name and email, e.g.

# username = Jane Doe <jdoe@example.com>

username =

# uncomment to colorize command output

# color = auto

[extensions]

# uncomment these lines to enable some popular extensions

# (see 'hg help extensions' for more info)

#

# pager =""",

    'cloned':

"""# example repository config (see 'hg help config' for more info)

[paths]

default = %s

# path aliases to other clones of this repo in URLs or filesystem paths

# (see 'hg help config.paths' for more info)

#

# default:pushurl = ssh://jdoe@example.net/hg/jdoes-fork

# my-fork         = ssh://jdoe@example.net/hg/jdoes-fork

# my-clone        = /home/jdoe/jdoes-clone

[ui]

# name and email (local to this repository, optional), e.g.

# username = Jane Doe <jdoe@example.com>

""",

    'local':

"""# example repository config (see 'hg help config' for more info)

[paths]

# path aliases to other clones of this repo in URLs or filesystem paths

# (see 'hg help config.paths' for more info)

#

# default         = http://example.com/hg/example-repo

# default:pushurl = ssh://jdoe@example.net/hg/jdoes-fork

# my-fork         = ssh://jdoe@example.net/hg/jdoes-fork

# my-clone        = /home/jdoe/jdoes-clone

[ui]

# name and email (local to this repository, optional), e.g.

# username = Jane Doe <jdoe@example.com>

""",

    'global':

"""# example system-wide hg config (see 'hg help config' for more info)

[ui]

# uncomment to colorize command output

# color = auto

[extensions]

# uncomment these lines to enable some popular extensions

# (see 'hg help extensions' for more info)

#

# blackbox =

# pager =""",

}

class httppasswordmgrdbproxy(object):

    """Delays loading urllib2 until it's needed."""

    def __init__(self):

        self._mgr = None

    def _get_mgr(self):

        if self._mgr is None:

            self._mgr = urlreq.httppasswordmgrwithdefaultrealm()

        return self._mgr

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

        return self._get_mgr().add_password(*args, **kwargs)

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

        return self._get_mgr().find_user_password(*args, **kwargs)

def _catchterm(*args):

    raise error.SignalInterrupt

class ui(object):

    def __init__(self, src=None):

        """Create a fresh new ui object if no src given

        Use uimod.ui.load() to create a ui which knows global and user configs.

        In most cases, you should use ui.copy() to create a copy of an existing

        ui object.

        """

        # _buffers: used for temporary capture of output

        self._buffers = []

        # 3-tuple describing how each buffer in the stack behaves.

        # Values are (capture stderr, capture subprocesses, apply labels).

        self._bufferstates = []

        # When a buffer is active, defines whether we are expanding labels.

        # This exists to prevent an extra list lookup.

        self._bufferapplylabels = None

        self.quiet = self.verbose = self.debugflag = self.tracebackflag = False

        self._reportuntrusted = True

        self._ocfg = config.config() # overlay

        self._tcfg = config.config() # trusted

        self._ucfg = config.config() # untrusted

        self._trustusers = set()

        self._trustgroups = set()

        self.callhooks = True

        # Insecure server connections requested.

        self.insecureconnections = False

        # Blocked time

        self.logblockedtimes = False

        # color mode: see mercurial/color.py for possible value

        self._colormode = None

        self._terminfoparams = {}

        self._styles = {}

        if src:

            self.fout = src.fout

            self.ferr = src.ferr

            self.fin = src.fin

            self.pageractive = src.pageractive

            self._disablepager = src._disablepager

            self._tcfg = src._tcfg.copy()

            self._ucfg = src._ucfg.copy()

            self._ocfg = src._ocfg.copy()

            self._trustusers = src._trustusers.copy()

            self._trustgroups = src._trustgroups.copy()

            self.environ = src.environ

            self.callhooks = src.callhooks

            self.insecureconnections = src.insecureconnections

            self._colormode = src._colormode

            self._terminfoparams = src._terminfoparams.copy()

            self._styles = src._styles.copy()

            self.fixconfig()

            self.httppasswordmgrdb = src.httppasswordmgrdb

            self._blockedtimes = src._blockedtimes

        else:

            self.fout = util.stdout

            self.ferr = util.stderr

            self.fin = util.stdin

            self.pageractive = False

            self._disablepager = False

            # shared read-only environment

            self.environ = encoding.environ

            self.httppasswordmgrdb = httppasswordmgrdbproxy()

            self._blockedtimes = collections.defaultdict(int)

        allowed = self.configlist('experimental', 'exportableenviron')

        if '*' in allowed:

            self._exportableenviron = self.environ

        else:

            self._exportableenviron = {}

            for k in allowed:

                if k in self.environ:

                    self._exportableenviron[k] = self.environ[k]

    @classmethod

    def load(cls):

        """Create a ui and load global and user configs"""

        u = cls()

        # we always trust global config files

        for f in scmutil.rcpath():

            u.readconfig(f, trust=True)

        return u

    def copy(self):

        return self.__class__(self)

    def resetstate(self):

        """Clear internal state that shouldn't persist across commands"""

        if self._progbar:

            self._progbar.resetstate()  # reset last-print time of progress bar

        self.httppasswordmgrdb = httppasswordmgrdbproxy()

    @contextlib.contextmanager

    def timeblockedsection(self, key):

        # this is open-coded below - search for timeblockedsection to find them

        starttime = util.timer()

        try:

            yield

        finally:

            self._blockedtimes[key + '_blocked'] += \

                (util.timer() - starttime) * 1000

    def formatter(self, topic, opts):

        return formatter.formatter(self, topic, opts)

    def _trusted(self, fp, f):

        st = util.fstat(fp)

        if util.isowner(st):

            return True

        tusers, tgroups = self._trustusers, self._trustgroups

        if '*' in tusers or '*' in tgroups:

            return True

        user = util.username(st.st_uid)

        group = util.groupname(st.st_gid)

        if user in tusers or group in tgroups or user == util.username():

            return True

        if self._reportuntrusted:

            self.warn(_('not trusting file %s from untrusted '

                        'user %s, group %s\n') % (f, user, group))

        return False

    def readconfig(self, filename, root=None, trust=False,

                   sections=None, remap=None):

        try:

            fp = open(filename, u'rb')

        except IOError:

            if not sections: # ignore unless we were looking for something

                return

            raise

        cfg = config.config()

        trusted = sections or trust or self._trusted(fp, filename)

        try:

            cfg.read(filename, fp, sections=sections, remap=remap)

            fp.close()

        except error.ConfigError as inst:

            if trusted:

                raise

            self.warn(_("ignored: %s\n") % str(inst))

        if self.plain():

            for k in ('debug', 'fallbackencoding', 'quiet', 'slash',

                      'logtemplate', 'statuscopies', 'style',

                      'traceback', 'verbose'):

                if k in cfg['ui']:

                    del cfg['ui'][k]

            for k, v in cfg.items('defaults'):

                del cfg['defaults'][k]

            for k, v in cfg.items('commands'):

                del cfg['commands'][k]

        # Don't remove aliases from the configuration if in the exceptionlist

        if self.plain('alias'):

            for k, v in cfg.items('alias'):

                del cfg['alias'][k]

        if self.plain('revsetalias'):

            for k, v in cfg.items('revsetalias'):

                del cfg['revsetalias'][k]

        if self.plain('templatealias'):

            for k, v in cfg.items('templatealias'):

                del cfg['templatealias'][k]

        if trusted:

            self._tcfg.update(cfg)

            self._tcfg.update(self._ocfg)

        self._ucfg.update(cfg)

        self._ucfg.update(self._ocfg)

        if root is None:

            root = os.path.expanduser('~')

        self.fixconfig(root=root)

    def fixconfig(self, root=None, section=None):

        if section in (None, 'paths'):

            # expand vars and ~

            # translate paths relative to root (or home) into absolute paths

            root = root or pycompat.getcwd()

            for c in self._tcfg, self._ucfg, self._ocfg:

                for n, p in c.items('paths'):

                    # Ignore sub-options.

                    if ':' in n:

                        continue

                    if not p:

                        continue

                    if '%%' in p:

                        s = self.configsource('paths', n) or 'none'

                        self.warn(_("(deprecated '%%' in path %s=%s from %s)\n")

                                  % (n, p, s))

                        p = p.replace('%%', '%')

                    p = util.expandpath(p)

                    if not util.hasscheme(p) and not os.path.isabs(p):

                        p = os.path.normpath(os.path.join(root, p))

                    c.set("paths", n, p)

        if section in (None, 'ui'):

            # update ui options

            self.debugflag = self.configbool('ui', 'debug')

            self.verbose = self.debugflag or self.configbool('ui', 'verbose')

            self.quiet = not self.debugflag and self.configbool('ui', 'quiet')

            if self.verbose and self.quiet:

                self.quiet = self.verbose = False

            self._reportuntrusted = self.debugflag or self.configbool("ui",

                "report_untrusted", True)

            self.tracebackflag = self.configbool('ui', 'traceback', False)

            self.logblockedtimes = self.configbool('ui', 'logblockedtimes')

        if section in (None, 'trusted'):

            # update trust information

            self._trustusers.update(self.configlist('trusted', 'users'))

            self._trustgroups.update(self.configlist('trusted', 'groups'))

    def backupconfig(self, section, item):

        return (self._ocfg.backup(section, item),

                self._tcfg.backup(section, item),

                self._ucfg.backup(section, item),)

    def restoreconfig(self, data):

        self._ocfg.restore(data[0])

        self._tcfg.restore(data[1])

        self._ucfg.restore(data[2])

    def setconfig(self, section, name, value, source=''):

        for cfg in (self._ocfg, self._tcfg, self._ucfg):

            cfg.set(section, name, value, source)

        self.fixconfig(section=section)

    def _data(self, untrusted):

        return untrusted and self._ucfg or self._tcfg

    def configsource(self, section, name, untrusted=False):

        return self._data(untrusted).source(section, name)

    def config(self, section, name, default=None, untrusted=False):

        if isinstance(name, list):

            alternates = name

        else:

            alternates = [name]