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# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# Copyright (c) 2013, Intel Corporation.
# All rights reserved.
#
# 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.
#
# DESCRIPTION
# This module implements the image creation engine used by 'wic' to
# create images. The engine parses through the OpenEmbedded kickstart
# (wks) file specified and generates images that can then be directly
# written onto media.
#
# AUTHORS
# Tom Zanussi <tom.zanussi (at] linux.intel.com>
#
import logging
import os
from wic.errors import WicError
from wic.plugin import pluginmgr
from wic.utils.misc import get_bitbake_var
logger = logging.getLogger('wic')
def verify_build_env():
"""
Verify that the build environment is sane.
Returns True if it is, false otherwise
"""
if not os.environ.get("BUILDDIR"):
raise WicError("BUILDDIR not found, exiting. (Did you forget to source oe-init-build-env?)")
return True
CANNED_IMAGE_DIR = "lib/wic/canned-wks" # relative to scripts
SCRIPTS_CANNED_IMAGE_DIR = "scripts/" + CANNED_IMAGE_DIR
WIC_DIR = "wic"
def build_canned_image_list(path):
layers_path = get_bitbake_var("BBLAYERS")
canned_wks_layer_dirs = []
if layers_path is not None:
for layer_path in layers_path.split():
for wks_path in (WIC_DIR, SCRIPTS_CANNED_IMAGE_DIR):
cpath = os.path.join(layer_path, wks_path)
if os.path.isdir(cpath):
canned_wks_layer_dirs.append(cpath)
cpath = os.path.join(path, CANNED_IMAGE_DIR)
canned_wks_layer_dirs.append(cpath)
return canned_wks_layer_dirs
def find_canned_image(scripts_path, wks_file):
"""
Find a .wks file with the given name in the canned files dir.
Return False if not found
"""
layers_canned_wks_dir = build_canned_image_list(scripts_path)
for canned_wks_dir in layers_canned_wks_dir:
for root, dirs, files in os.walk(canned_wks_dir):
for fname in files:
if fname.endswith("~") or fname.endswith("#"):
continue
if fname.endswith(".wks") and wks_file + ".wks" == fname:
fullpath = os.path.join(canned_wks_dir, fname)
return fullpath
return None
def list_canned_images(scripts_path):
"""
List the .wks files in the canned image dir, minus the extension.
"""
layers_canned_wks_dir = build_canned_image_list(scripts_path)
for canned_wks_dir in layers_canned_wks_dir:
for root, dirs, files in os.walk(canned_wks_dir):
for fname in files:
if fname.endswith("~") or fname.endswith("#"):
continue
if fname.endswith(".wks"):
fullpath = os.path.join(canned_wks_dir, fname)
with open(fullpath) as wks:
for line in wks:
desc = ""
idx = line.find("short-description:")
if idx != -1:
desc = line[idx + len("short-description:"):].strip()
break
basename = os.path.splitext(fname)[0]
print(" %s\t\t%s" % (basename.ljust(30), desc))
def list_canned_image_help(scripts_path, fullpath):
"""
List the help and params in the specified canned image.
"""
found = False
with open(fullpath) as wks:
for line in wks:
if not found:
idx = line.find("long-description:")
if idx != -1:
print()
print(line[idx + len("long-description:"):].strip())
found = True
continue
if not line.strip():
break
idx = line.find("#")
if idx != -1:
print(line[idx + len("#:"):].rstrip())
else:
break
def list_source_plugins():
"""
List the available source plugins i.e. plugins available for --source.
"""
plugins = pluginmgr.get_source_plugins()
for plugin in plugins:
print(" %s" % plugin)
def wic_create(wks_file, rootfs_dir, bootimg_dir, kernel_dir,
native_sysroot, options):
"""
Create image
wks_file - user-defined OE kickstart file
rootfs_dir - absolute path to the build's /rootfs dir
bootimg_dir - absolute path to the build's boot artifacts directory
kernel_dir - absolute path to the build's kernel directory
native_sysroot - absolute path to the build's native sysroots dir
image_output_dir - dirname to create for image
options - wic command line options (debug, bmap, etc)
Normally, the values for the build artifacts values are determined
by 'wic -e' from the output of the 'bitbake -e' command given an
image name e.g. 'core-image-minimal' and a given machine set in
local.conf. If that's the case, the variables get the following
values from the output of 'bitbake -e':
rootfs_dir: IMAGE_ROOTFS
kernel_dir: DEPLOY_DIR_IMAGE
native_sysroot: STAGING_DIR_NATIVE
In the above case, bootimg_dir remains unset and the
plugin-specific image creation code is responsible for finding the
bootimg artifacts.
In the case where the values are passed in explicitly i.e 'wic -e'
is not used but rather the individual 'wic' options are used to
explicitly specify these values.
"""
try:
oe_builddir = os.environ["BUILDDIR"]
except KeyError:
raise WicError("BUILDDIR not found, exiting. (Did you forget to source oe-init-build-env?)")
if not os.path.exists(options.outdir):
os.makedirs(options.outdir)
pname = 'direct'
plugin_class = pluginmgr.get_plugins('imager').get(pname)
if not plugin_class:
raise WicError('Unknown plugin: %s' % pname)
plugin = plugin_class(wks_file, rootfs_dir, bootimg_dir, kernel_dir,
native_sysroot, oe_builddir, options)
plugin.do_create()
logger.info("The image(s) were created using OE kickstart file:\n %s", wks_file)
def wic_list(args, scripts_path):
"""
Print the list of images or source plugins.
"""
if len(args) < 1:
return False
if args == ["images"]:
list_canned_images(scripts_path)
return True
elif args == ["source-plugins"]:
list_source_plugins()
return True
elif len(args) == 2 and args[1] == "help":
wks_file = args[0]
fullpath = find_canned_image(scripts_path, wks_file)
if not fullpath:
raise WicError("No image named %s found, exiting. "
"(Use 'wic list images' to list available images, "
"or specify a fully-qualified OE kickstart (.wks) "
"filename)" % wks_file)
list_canned_image_help(scripts_path, fullpath)
return True
return False
def find_canned(scripts_path, file_name):
"""
Find a file either by its path or by name in the canned files dir.
Return None if not found
"""
if os.path.exists(file_name):
return file_name
layers_canned_wks_dir = build_canned_image_list(scripts_path)
for canned_wks_dir in layers_canned_wks_dir:
for root, dirs, files in os.walk(canned_wks_dir):
for fname in files:
if fname == file_name:
fullpath = os.path.join(canned_wks_dir, fname)
return fullpath
def get_custom_config(boot_file):
"""
Get the custom configuration to be used for the bootloader.
Return None if the file can't be found.
"""
# Get the scripts path of poky
scripts_path = os.path.abspath("%s/../.." % os.path.dirname(__file__))
cfg_file = find_canned(scripts_path, boot_file)
if cfg_file:
with open(cfg_file, "r") as f:
config = f.read()
return config
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