poky/scripts/lib/devtool/__init__.py
Paul Eggleton 2054b29dd7 devtool: deploy: fix preservation of symlinks and permissions/ownership
It turns out that scp can't be used to copy symlinks because it follows
them instead of copying them, and this is by design (since it emulates
rcp which also behaved this way); the unfortunate result is that
symlinks that point to valid files on the host translate into the host
file being copied to the target (yuck).  The simplest alternative that
does not have this undesirable behaviour is to use tar and pipe it over
ssh.

At the same time, it would be even better if we properly reflect file
permissions and ownership on the target that have been established
within the pseudo environment. We can do this by executing the copy
process under pseudo, which turns out to be quite easy with access to
the pseudo environment set up by the build system.

Fixes [YOCTO #7868].

(From OE-Core rev: 69adaed0e982d627ebfa57b360b0ee049ea7a276)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2015-06-18 09:14:06 +01:00

113 lines
4.0 KiB
Python

#!/usr/bin/env python
# Development tool - utility functions for plugins
#
# Copyright (C) 2014 Intel Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""Devtool plugins module"""
import os
import sys
import subprocess
import logging
logger = logging.getLogger('devtool')
class DevtoolError(Exception):
"""Exception for handling devtool errors"""
pass
def exec_build_env_command(init_path, builddir, cmd, watch=False, **options):
"""Run a program in bitbake build context"""
import bb
if not 'cwd' in options:
options["cwd"] = builddir
if init_path:
# As the OE init script makes use of BASH_SOURCE to determine OEROOT,
# and can't determine it when running under dash, we need to set
# the executable to bash to correctly set things up
if not 'executable' in options:
options['executable'] = 'bash'
logger.debug('Executing command: "%s" using init path %s' % (cmd, init_path))
init_prefix = '. %s %s > /dev/null && ' % (init_path, builddir)
else:
logger.debug('Executing command "%s"' % cmd)
init_prefix = ''
if watch:
if sys.stdout.isatty():
# Fool bitbake into thinking it's outputting to a terminal (because it is, indirectly)
cmd = 'script -e -q -c "%s" /dev/null' % cmd
return exec_watch('%s%s' % (init_prefix, cmd), **options)
else:
return bb.process.run('%s%s' % (init_prefix, cmd), **options)
def exec_watch(cmd, **options):
"""Run program with stdout shown on sys.stdout"""
import bb
if isinstance(cmd, basestring) and not "shell" in options:
options["shell"] = True
process = subprocess.Popen(
cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, **options
)
buf = ''
while True:
out = process.stdout.read(1)
if out:
sys.stdout.write(out)
sys.stdout.flush()
buf += out
elif out == '' and process.poll() != None:
break
if process.returncode != 0:
raise bb.process.ExecutionError(cmd, process.returncode, buf, None)
return buf, None
def exec_fakeroot(d, cmd, **kwargs):
"""Run a command under fakeroot (pseudo, in fact) so that it picks up the appropriate file permissions"""
# Grab the command and check it actually exists
fakerootcmd = d.getVar('FAKEROOTCMD', True)
if not os.path.exists(fakerootcmd):
logger.error('pseudo executable %s could not be found - have you run a build yet? pseudo-native should install this and if you have run any build then that should have been built')
return 2
# Set up the appropriate environment
newenv = dict(os.environ)
fakerootenv = d.getVar('FAKEROOTENV', True)
for varvalue in fakerootenv.split():
if '=' in varvalue:
splitval = varvalue.split('=', 1)
newenv[splitval[0]] = splitval[1]
return subprocess.call("%s %s" % (fakerootcmd, cmd), env=newenv, **kwargs)
def setup_tinfoil():
"""Initialize tinfoil api from bitbake"""
import scriptpath
bitbakepath = scriptpath.add_bitbake_lib_path()
if not bitbakepath:
logger.error("Unable to find bitbake by searching parent directory of this script or PATH")
sys.exit(1)
import bb.tinfoil
tinfoil = bb.tinfoil.Tinfoil()
tinfoil.prepare(False)
tinfoil.logger.setLevel(logger.getEffectiveLevel())
return tinfoil