PTU5KAS/kas/plugins/shell.py

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# kas - setup tool for bitbake based projects
#
# Copyright (c) Siemens AG, 2017-2018
#
# 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.
"""
This plugin implements the ``kas shell`` command.
When this command is executed, kas will checkout repositories, setup the
build environment and then start a shell in the build environment. This
can be used to manually run ``bitbake`` with custom command line options
or to execute other commands such as ``runqemu``.
For example, to start a shell in the build environment for the file
``kas-project.yml`` you could run::
kas shell kas-project.yml
Or to invoke qemu to test an image which has been built::
kas shell kas-project.yml -c 'runqemu'
"""
import logging
import os
import subprocess
import sys
from kas.context import create_global_context
from kas.config import Config
from kas.libcmds import Macro, Command, SetupHome
from kas.libkas import setup_parser_common_args
from kas.libkas import setup_parser_preserve_env_arg
from kas.libkas import run_handle_preserve_env_arg
__license__ = 'MIT'
__copyright__ = 'Copyright (c) Siemens AG, 2017-2018'
class Shell:
"""
Implements a kas plugin that opens a shell within the kas environment.
"""
name = 'shell'
helpmsg = 'Run a shell in the build environment.'
@classmethod
def setup_parser(cls, parser):
"""
Setup the argument parser for the shell plugin
"""
setup_parser_common_args(parser)
setup_parser_preserve_env_arg(parser)
parser.add_argument('-k', '--keep-config-unchanged',
help='Skip steps that change the configuration',
action='store_true')
parser.add_argument('-c', '--command',
help='Run command',
default='')
def run(self, args):
"""
Runs this kas plugin
"""
ctx = create_global_context(args)
ctx.config = Config(ctx, args.config)
run_handle_preserve_env_arg(ctx, os, args, SetupHome)
if args.keep_config_unchanged:
# Skip the tasks which would change the config of the build
# environment
args.skip += [
'setup_dir',
'finish_setup_repos',
'repos_apply_patches',
'write_bbconfig',
]
macro = Macro()
macro.add(ShellCommand(args.command))
macro.run(ctx, args.skip)
class ShellCommand(Command):
"""
This class implements the command that starts a shell.
"""
def __init__(self, cmd):
super().__init__()
self.cmd = []
if cmd:
self.cmd = cmd
def __str__(self):
return 'shell'
def execute(self, ctx):
logging.info("To start the default build, run: bitbake -c %s %s",
ctx.config.get_bitbake_task(),
' '.join(ctx.config.get_bitbake_targets()))
cmd = [ctx.environ.get('SHELL', '/bin/sh')]
if self.cmd:
cmd.append('-c')
cmd.append(self.cmd)
ret = subprocess.call(cmd, env=ctx.environ, cwd=ctx.build_dir)
if ret != 0:
logging.error('Shell returned non-zero exit status %d', ret)
sys.exit(ret)
__KAS_PLUGINS__ = [Shell]