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# -*- coding: utf-8 -*-
# Copyright © 2012-2016 Chris Warrick, Roberto Alsina and others.
# Permission is hereby granted, free of charge, to any
# person obtaining a copy of this software and associated
# documentation files (the "Software"), to deal in the
# Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the
# Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice
# shall be included in all copies or substantial portions of
# the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
# PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
# OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""Start debugging console."""
from __future__ import print_function, unicode_literals
import os
from nikola import __version__
from nikola.plugin_categories import Command
from nikola.utils import get_logger, STDERR_HANDLER, req_missing, Commands
LOGGER = get_logger('console', STDERR_HANDLER)
class CommandConsole(Command):
"""Start debugging console."""
name = "console"
shells = ['ipython', 'bpython', 'plain']
doc_purpose = "start an interactive Python console with access to your site"
doc_description = """\
The site engine is accessible as `site`, the config file as `conf`, and commands are available as `commands`.
If there is no console to use specified (as -b, -i, -p) it tries IPython, then falls back to bpython, and finally falls back to the plain Python console."""
header = "Nikola v" + __version__ + " -- {0} Console (conf = configuration file, site = site engine, commands = nikola commands)"
cmd_options = [
{
'name': 'bpython',
'short': 'b',
'long': 'bpython',
'type': bool,
'default': False,
'help': 'Use bpython',
},
{
'name': 'ipython',
'short': 'i',
'long': 'plain',
'type': bool,
'default': False,
'help': 'Use IPython',
},
{
'name': 'plain',
'short': 'p',
'long': 'plain',
'type': bool,
'default': False,
'help': 'Use the plain Python interpreter',
},
]
def ipython(self, willful=True):
"""Run an IPython shell."""
try:
import IPython
except ImportError as e:
if willful:
req_missing(['IPython'], 'use the IPython console')
raise e # That’s how _execute knows whether to try something else.
else:
site = self.context['site'] # NOQA
nikola_site = self.context['site'] # NOQA
conf = self.context['conf'] # NOQA
commands = self.context['commands'] # NOQA
IPython.embed(header=self.header.format('IPython'))
def bpython(self, willful=True):
"""Run a bpython shell."""
try:
import bpython
except ImportError as e:
if willful:
req_missing(['bpython'], 'use the bpython console')
raise e # That’s how _execute knows whether to try something else.
else:
bpython.embed(banner=self.header.format('bpython'), locals_=self.context)
def plain(self, willful=True):
"""Run a plain Python shell."""
import code
try:
import readline
except ImportError:
pass
else:
import rlcompleter
readline.set_completer(rlcompleter.Completer(self.context).complete)
readline.parse_and_bind("tab:complete")
pythonrc = os.environ.get("PYTHONSTARTUP")
if pythonrc and os.path.isfile(pythonrc):
try:
execfile(pythonrc) # NOQA
except NameError:
pass
code.interact(local=self.context, banner=self.header.format('Python'))
def _execute(self, options, args):
"""Start the console."""
self.site.scan_posts()
# Create nice object with all commands:
self.site.commands = Commands(self.site.doit, self.config, self._doitargs)
self.context = {
'conf': self.site.config,
'site': self.site,
'nikola_site': self.site,
'commands': self.site.commands,
}
if options['bpython']:
self.bpython(True)
elif options['ipython']:
self.ipython(True)
elif options['plain']:
self.plain(True)
else:
for shell in self.shells:
try:
return getattr(self, shell)(False)
except ImportError:
pass
raise ImportError
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