poky/scripts/wic

#!/usr/bin/env python3

Copyright (c) 2013, Intel Corporation.

SPDX-License-Identifier: GPL-2.0-only

DESCRIPTION 'wic' is the OpenEmbedded Image Creator that users can

use to generate bootable images. Invoking it without any arguments

will display help screens for the 'wic' command and list the

available 'wic' subcommands. Invoking a subcommand without any

arguments will likewise display help screens for the specified

subcommand. Please use that interface for detailed help.

AUTHORS

Tom Zanussi <tom.zanussi (at] linux.intel.com>

version = "0.2.0"

Python Standard Library modules

import os import sys import argparse import logging import subprocess

from collections import namedtuple from distutils import spawn

External modules

scripts_path = os.path.dirname(os.path.realpath(file)) lib_path = scripts_path + '/lib' sys.path.insert(0, lib_path) import scriptpath scriptpath.add_oe_lib_path()

Check whether wic is running within eSDK environment

sdkroot = scripts_path if os.environ.get('SDKTARGETSYSROOT'): while sdkroot != '' and sdkroot != os.sep: if os.path.exists(os.path.join(sdkroot, '.devtoolbase')): # Set BUILDDIR for wic to work within eSDK os.environ['BUILDDIR'] = sdkroot # .devtoolbase only exists within eSDK # If found, initialize bitbake path for eSDK environment and append to PATH sdkroot = os.path.join(os.path.dirname(scripts_path), 'bitbake', 'bin') os.environ['PATH'] += ":" + sdkroot break sdkroot = os.path.dirname(sdkroot)

bitbake_exe = spawn.find_executable('bitbake') if bitbake_exe: bitbake_path = scriptpath.add_bitbake_lib_path() import bb

from wic import WicError from wic.misc import get_bitbake_var, BB_VARS from wic import engine from wic import help as hlp

def wic_logger(): """Create and convfigure wic logger.""" logger = logging.getLogger('wic') logger.setLevel(logging.INFO)

handler = logging.StreamHandler()

formatter = logging.Formatter('%(levelname)s: %(message)s')
handler.setFormatter(formatter)

logger.addHandler(handler)

return logger

logger = wic_logger()

def rootfs_dir_to_args(krootfs_dir): """ Get a rootfs_dir dict and serialize to string """ rootfs_dir = '' for key, val in krootfs_dir.items(): rootfs_dir += ' ' rootfs_dir += '='.join([key, val]) return rootfs_dir.strip()

class RootfsArgAction(argparse.Action): def init(self, **kwargs): super().init(**kwargs)

def __call__(self, parser, namespace, value, option_string=None):
    if not "rootfs_dir" in vars(namespace) or \
       not type(namespace.__dict__['rootfs_dir']) is dict:
        namespace.__dict__['rootfs_dir'] = {}

    if '=' in value:
        (key, rootfs_dir) = value.split('=')
    else:
        key = 'ROOTFS_DIR'
        rootfs_dir = value

    namespace.__dict__['rootfs_dir'][key] = rootfs_dir

def wic_create_subcommand(options, usage_str): """ Command-line handling for image creation. The real work is done by image.engine.wic_create() """ if options.build_rootfs and not bitbake_exe: raise WicError("Can't build rootfs as bitbake is not in the $PATH")

if not options.image_name:
    missed = []
    for val, opt in [(options.rootfs_dir, 'rootfs-dir'),
                     (options.bootimg_dir, 'bootimg-dir'),
                     (options.kernel_dir, 'kernel-dir'),
                     (options.native_sysroot, 'native-sysroot')]:
        if not val:
            missed.append(opt)
    if missed:
        raise WicError("The following build artifacts are not specified: %s" %
                       ", ".join(missed))

if options.image_name:
    BB_VARS.default_image = options.image_name
else:
    options.build_check = False

if options.vars_dir:
    BB_VARS.vars_dir = options.vars_dir

if options.build_check and not engine.verify_build_env():
    raise WicError("Couldn't verify build environment, exiting")

if options.debug:
    logger.setLevel(logging.DEBUG)

if options.image_name:
    if options.build_rootfs:
        argv = ["bitbake", options.image_name]
        if options.debug:
            argv.append("--debug")

        logger.info("Building rootfs...\n")
        subprocess.check_call(argv)

    rootfs_dir = get_bitbake_var("IMAGE_ROOTFS", options.image_name)
    kernel_dir = get_bitbake_var("DEPLOY_DIR_IMAGE", options.image_name)
    bootimg_dir = get_bitbake_var("STAGING_DATADIR", options.image_name)

    native_sysroot = options.native_sysroot
    if options.vars_dir and not native_sysroot:
        native_sysroot = get_bitbake_var("RECIPE_SYSROOT_NATIVE", options.image_name)
else:
    if options.build_rootfs:
        raise WicError("Image name is not specified, exiting. "
                       "(Use -e/--image-name to specify it)")
    native_sysroot = options.native_sysroot

if not options.vars_dir and (not native_sysroot or not os.path.isdir(native_sysroot)):
    logger.info("Building wic-tools...\n")
    subprocess.check_call(["bitbake", "wic-tools"])
    native_sysroot = get_bitbake_var("RECIPE_SYSROOT_NATIVE", "wic-tools")

if not native_sysroot:
    raise WicError("Unable to find the location of the native tools sysroot")

wks_file = options.wks_file

if not wks_file.endswith(".wks"):
    wks_file = engine.find_canned_image(scripts_path, wks_file)
    if not wks_file:
        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)" % options.wks_file)

if not options.image_name:
    rootfs_dir = ''
    if 'ROOTFS_DIR' in options.rootfs_dir:
        rootfs_dir = options.rootfs_dir['ROOTFS_DIR']
    bootimg_dir = options.bootimg_dir
    kernel_dir = options.kernel_dir
    native_sysroot = options.native_sysroot
    if rootfs_dir and not os.path.isdir(rootfs_dir):
        raise WicError("--rootfs-dir (-r) not found, exiting")
    if not os.path.isdir(bootimg_dir):
        raise WicError("--bootimg-dir (-b) not found, exiting")
    if not os.path.isdir(kernel_dir):
        raise WicError("--kernel-dir (-k) not found, exiting")
    if not os.path.isdir(native_sysroot):
        raise WicError("--native-sysroot (-n) not found, exiting")
else:
    not_found = not_found_dir = ""
    if not os.path.isdir(rootfs_dir):
        (not_found, not_found_dir) = ("rootfs-dir", rootfs_dir)
    elif not os.path.isdir(kernel_dir):
        (not_found, not_found_dir) = ("kernel-dir", kernel_dir)
    elif not os.path.isdir(native_sysroot):
        (not_found, not_found_dir) = ("native-sysroot", native_sysroot)
    if not_found:
        if not not_found_dir:
            not_found_dir = "Completely missing artifact - wrong image (.wks) used?"
        logger.info("Build artifacts not found, exiting.")
        logger.info("  (Please check that the build artifacts for the machine")
        logger.info("   selected in local.conf actually exist and that they")
        logger.info("   are the correct artifacts for the image (.wks file)).\n")
        raise WicError("The artifact that couldn't be found was %s:\n  %s", not_found, not_found_dir)

krootfs_dir = options.rootfs_dir
if krootfs_dir is None:
    krootfs_dir = {}
    krootfs_dir['ROOTFS_DIR'] = rootfs_dir

rootfs_dir = rootfs_dir_to_args(krootfs_dir)

logger.info("Creating image(s)...\n")
engine.wic_create(wks_file, rootfs_dir, bootimg_dir, kernel_dir,
                  native_sysroot, options)

def wic_list_subcommand(args, usage_str): """ Command-line handling for listing available images. The real work is done by image.engine.wic_list() """ if not engine.wic_list(args, scripts_path): raise WicError("Bad list arguments, exiting")

def wic_ls_subcommand(args, usage_str): """ Command-line handling for list content of images. The real work is done by engine.wic_ls() """ engine.wic_ls(args, args.native_sysroot)

def wic_cp_subcommand(args, usage_str): """ Command-line handling for copying files/dirs to images. The real work is done by engine.wic_cp() """ engine.wic_cp(args, args.native_sysroot)

def wic_rm_subcommand(args, usage_str): """ Command-line handling for removing files/dirs from images. The real work is done by engine.wic_rm() """ engine.wic_rm(args, args.native_sysroot)

def wic_write_subcommand(args, usage_str): """ Command-line handling for writing images. The real work is done by engine.wic_write() """ engine.wic_write(args, args.native_sysroot)

def wic_help_subcommand(args, usage_str): """ Command-line handling for help subcommand to keep the current structure of the function definitions. """ pass

def wic_help_topic_subcommand(usage_str, help_str): """ Display function for help 'sub-subcommands'. """ print(help_str) return

wic_help_topic_usage = """ """

helptopics = { "plugins": [wic_help_topic_subcommand, wic_help_topic_usage, hlp.wic_plugins_help], "overview": [wic_help_topic_subcommand, wic_help_topic_usage, hlp.wic_overview_help], "kickstart": [wic_help_topic_subcommand, wic_help_topic_usage, hlp.wic_kickstart_help], "create": [wic_help_topic_subcommand, wic_help_topic_usage, hlp.wic_create_help], "ls": [wic_help_topic_subcommand, wic_help_topic_usage, hlp.wic_ls_help], "cp": [wic_help_topic_subcommand, wic_help_topic_usage, hlp.wic_cp_help], "rm": [wic_help_topic_subcommand, wic_help_topic_usage, hlp.wic_rm_help], "write": [wic_help_topic_subcommand, wic_help_topic_usage, hlp.wic_write_help], "list": [wic_help_topic_subcommand, wic_help_topic_usage, hlp.wic_list_help] }

def wic_init_parser_create(subparser): subparser.add_argument("wks_file")

subparser.add_argument("-o", "--outdir", dest="outdir", default='.',
                  help="name of directory to create image in")
subparser.add_argument("-e", "--image-name", dest="image_name",
                  help="name of the image to use the artifacts from "
                       "e.g. core-image-sato")
subparser.add_argument("-r", "--rootfs-dir", action=RootfsArgAction,
                  help="path to the /rootfs dir to use as the "
                       ".wks rootfs source")
subparser.add_argument("-b", "--bootimg-dir", dest="bootimg_dir",
                  help="path to the dir containing the boot artifacts "
                       "(e.g. /EFI or /syslinux dirs) to use as the "
                       ".wks bootimg source")
subparser.add_argument("-k", "--kernel-dir", dest="kernel_dir",
                  help="path to the dir containing the kernel to use "
                       "in the .wks bootimg")
subparser.add_argument("-n", "--native-sysroot", dest="native_sysroot",
                  help="path to the native sysroot containing the tools "
                       "to use to build the image")
subparser.add_argument("-s", "--skip-build-check", dest="build_check",
                  action="store_false", default=True, help="skip the build check")
subparser.add_argument("-f", "--build-rootfs", action="store_true", help="build rootfs")
subparser.add_argument("-c", "--compress-with", choices=("gzip", "bzip2", "xz"),
                  dest='compressor',
                  help="compress image with specified compressor")
subparser.add_argument("-m", "--bmap", action="store_true", help="generate .bmap")
subparser.add_argument("--no-fstab-update" ,action="store_true",
                  help="Do not change fstab file.")
subparser.add_argument("-v", "--vars", dest='vars_dir',
                  help="directory with <image>.env files that store "
                       "bitbake variables")
subparser.add_argument("-D", "--debug", dest="debug", action="store_true",
                  default=False, help="output debug information")
subparser.add_argument("-i", "--imager", dest="imager",
                  default="direct", help="the wic imager plugin")
return

def wic_init_parser_list(subparser): subparser.add_argument("list_type", help="can be 'images' or 'source-plugins' " "to obtain a list. " "If value is a valid .wks image file") subparser.add_argument("help_for", default=[], nargs='*', help="If 'list_type' is a valid .wks image file " "this value can be 'help' to show the help information " "defined inside the .wks file") return

def imgtype(arg): """ Custom type for ArgumentParser Converts path spec to named tuple: (image, partition, path) """ image = arg part = path = None if ':' in image: image, part = image.split(':') if '/' in part: part, path = part.split('/', 1) if not path: path = '/'

if not os.path.isfile(image):
    err = "%s is not a regular file or symlink" % image
    raise argparse.ArgumentTypeError(err)

return namedtuple('ImgType', 'image part path')(image, part, path)

def wic_init_parser_ls(subparser): subparser.add_argument("path", type=imgtype, help="image spec: [:[]]") subparser.add_argument("-n", "--native-sysroot", help="path to the native sysroot containing the tools")

def imgpathtype(arg): img = imgtype(arg) if img.part is None: raise argparse.ArgumentTypeError("partition number is not specified") return img

def wic_init_parser_cp(subparser): subparser.add_argument("src", help="source spec") subparser.add_argument("dest", type=imgpathtype, help="image spec: :[]") subparser.add_argument("-n", "--native-sysroot", help="path to the native sysroot containing the tools")

def wic_init_parser_rm(subparser): subparser.add_argument("path", type=imgpathtype, help="path: :") subparser.add_argument("-n", "--native-sysroot", help="path to the native sysroot containing the tools")

def expandtype(rules): """ Custom type for ArgumentParser Converts expand rules to the dictionary {: size} """ if rules == 'auto': return {} result = {} for rule in rules.split(','): try: part, size = rule.split(':') except ValueError: raise argparse.ArgumentTypeError("Incorrect rule format: %s" % rule)

    if not part.isdigit():
        raise argparse.ArgumentTypeError("Rule '%s': partition number must be integer" % rule)

    # validate size
    multiplier = 1
    for suffix, mult in [('K', 1024), ('M', 1024 * 1024), ('G', 1024 * 1024 * 1024)]:
        if size.upper().endswith(suffix):
            multiplier = mult
            size = size[:-1]
            break
    if not size.isdigit():
        raise argparse.ArgumentTypeError("Rule '%s': size must be integer" % rule)

    result[int(part)] = int(size) * multiplier

return result

def wic_init_parser_write(subparser): subparser.add_argument("image", help="path to the wic image") subparser.add_argument("target", help="target file or device") subparser.add_argument("-e", "--expand", type=expandtype, help="expand rules: auto or :[,:]") subparser.add_argument("-n", "--native-sysroot", help="path to the native sysroot containing the tools")

def wic_init_parser_help(subparser): helpparsers = subparser.add_subparsers(dest='help_topic', help=hlp.wic_usage) for helptopic in helptopics: helpparsers.add_parser(helptopic, help=helptopics[helptopic][2]) return

subcommands = { "create": [wic_create_subcommand, hlp.wic_create_usage, hlp.wic_create_help, wic_init_parser_create], "list": [wic_list_subcommand, hlp.wic_list_usage, hlp.wic_list_help, wic_init_parser_list], "ls": [wic_ls_subcommand, hlp.wic_ls_usage, hlp.wic_ls_help, wic_init_parser_ls], "cp": [wic_cp_subcommand, hlp.wic_cp_usage, hlp.wic_cp_help, wic_init_parser_cp], "rm": [wic_rm_subcommand, hlp.wic_rm_usage, hlp.wic_rm_help, wic_init_parser_rm], "write": [wic_write_subcommand, hlp.wic_write_usage, hlp.wic_write_help, wic_init_parser_write], "help": [wic_help_subcommand, wic_help_topic_usage, hlp.wic_help_help, wic_init_parser_help] }

def init_parser(parser): parser.add_argument("--version", action="version", version="%(prog)s {version}".format(version=version)) subparsers = parser.add_subparsers(dest='command', help=hlp.wic_usage) for subcmd in subcommands: subparser = subparsers.add_parser(subcmd, help=subcommands[subcmd][2]) subcommands[subcmd]3

def main(argv): parser = argparse.ArgumentParser( description="wic version %s" % version)

init_parser(parser)

args = parser.parse_args(argv)

if "command" in vars(args):
    if args.command == "help":
        if args.help_topic is None:
            parser.print_help()
            print()
            print("Please specify a help topic")
        elif args.help_topic in helptopics:
            hlpt = helptopics[args.help_topic]
            hlpt[0](hlpt[1], hlpt[2])
        return 0

return hlp.invoke_subcommand(args, parser, hlp.wic_help_usage, subcommands)

if name == "main": try: sys.exit(main(sys.argv[1:])) except WicError as err: print() logger.error(err) sys.exit(1)