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Diffstat (limited to 'scripts/lib/image/engine.py')
| -rw-r--r-- | scripts/lib/image/engine.py | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/scripts/lib/image/engine.py b/scripts/lib/image/engine.py new file mode 100644 index 0000000000..a9b530cc04 --- /dev/null +++ b/scripts/lib/image/engine.py @@ -0,0 +1,256 @@ +# 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 os +import sys +from abc import ABCMeta, abstractmethod +import shlex +import json +import subprocess +import shutil + +import os, sys, errno + + +def verify_build_env(): + """ + Verify that the build environment is sane. + + Returns True if it is, false otherwise + """ + try: + builddir = os.environ["BUILDDIR"] + except KeyError: + print "BUILDDIR not found, exiting. (Did you forget to source oe-init-build-env?)" + sys.exit(1) + + return True + + +def get_line_val(line, key): + """ + Extract the value from the VAR="val" string + """ + if line.startswith(key + "="): + stripped_line = line.split('=')[1] + stripped_line = stripped_line.replace('\"', '') + return stripped_line + return None + + +def find_artifacts(image_name): + """ + Gather the build artifacts for the current image (the image_name + e.g. core-image-minimal) for the current MACHINE set in local.conf + """ + bitbake_env_cmd = "bitbake -e %s" % image_name + rc, bitbake_env_lines = exec_cmd(bitbake_env_cmd) + if rc != 0: + print "Couldn't get '%s' output, exiting." % bitbake_env_cmd + sys.exit(1) + + for line in bitbake_env_lines.split('\n'): + if (get_line_val(line, "IMAGE_ROOTFS")): + rootfs_dir = get_line_val(line, "IMAGE_ROOTFS") + continue + if (get_line_val(line, "STAGING_KERNEL_DIR")): + kernel_dir = get_line_val(line, "STAGING_KERNEL_DIR") + continue + if (get_line_val(line, "HDDDIR")): + hdddir = get_line_val(line, "HDDDIR") + continue + if (get_line_val(line, "STAGING_DATADIR")): + staging_data_dir = get_line_val(line, "STAGING_DATADIR") + continue + if (get_line_val(line, "STAGING_DIR_NATIVE")): + native_sysroot = get_line_val(line, "STAGING_DIR_NATIVE") + continue + + return (rootfs_dir, kernel_dir, hdddir, staging_data_dir, native_sysroot) + + +CANNED_IMAGE_DIR = "lib/image/canned-wks" # relative to scripts + +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 + """ + canned_wks_dir = os.path.join(scripts_path, CANNED_IMAGE_DIR) + + for root, dirs, files in os.walk(canned_wks_dir): + for file in files: + if file.endswith("~") or file.endswith("#"): + continue + if file.endswith(".wks") and wks_file + ".wks" == file: + fullpath = os.path.join(canned_wks_dir, file) + return fullpath + return None + + +def list_canned_images(scripts_path): + """ + List the .wks files in the canned image dir, minus the extension. + """ + canned_wks_dir = os.path.join(scripts_path, CANNED_IMAGE_DIR) + + for root, dirs, files in os.walk(canned_wks_dir): + for file in files: + if file.endswith("~") or file.endswith("#"): + continue + if file.endswith(".wks"): + fullpath = os.path.join(canned_wks_dir, file) + f = open(fullpath, "r") + lines = f.readlines() + for line in lines: + desc = "" + idx = line.find("short-description:") + if idx != -1: + desc = line[idx + len("short-description:"):].strip() + break + basename = os.path.splitext(file)[0] + print " %s\t\t%s" % (basename, desc) + + +def list_canned_image_help(scripts_path, fullpath): + """ + List the help and params in the specified canned image. + """ + canned_wks_dir = os.path.join(scripts_path, CANNED_IMAGE_DIR) + + f = open(fullpath, "r") + lines = f.readlines() + found = False + for line in lines: + 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 wic_create(args, wks_file, rootfs_dir, bootimg_dir, kernel_dir, + native_sysroot, hdddir, staging_data_dir, scripts_path, + image_output_dir, properties_file, properties=None): + """ + 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 + hdddir - absolute path to the build's HDDDIR dir + staging_data_dir - absolute path to the build's STAGING_DATA_DIR dir + scripts_path - absolute path to /scripts dir + image_output_dir - dirname to create for image + properties_file - use values from this file if nonempty i.e no prompting + properties - use values from this string if nonempty i.e no prompting + + 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: STAGING_KERNEL_DIR + native_sysroot: STAGING_DIR_NATIVE + hdddir: HDDDIR + staging_data_dir: STAGING_DATA_DIR + + In the above case, bootimg_dir remains unset and the image + creation code determines which of the passed-in directories to + use. + + 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, hdddir and staging_data_dir will + be unset, but bootimg_dir must be explicit i.e. explicitly set to + either hdddir or staging_data_dir, depending on the image being + generated. The other values (rootfs_dir, kernel_dir, and + native_sysroot) correspond to the same values found above via + 'bitbake -e'). + + """ + try: + oe_builddir = os.environ["BUILDDIR"] + except KeyError: + print "BUILDDIR not found, exiting. (Did you forget to source oe-init-build-env?)" + sys.exit(1) + + +def wic_list(args, scripts_path, properties_file): + """ + Print the complete list of properties defined by the image, or the + possible values for a particular image property. + """ + if len(args) < 1: + return False + + if len(args) == 1: + if args[0] == "images": + list_canned_images(scripts_path) + return True + elif args[0] == "properties": + return True + else: + return False + + if len(args) == 2: + if args[0] == "properties": + wks_file = args[1] + print "print properties contained in wks file: %s" % wks_file + return True + elif args[0] == "property": + print "print property values for property: %s" % args[1] + return True + elif args[1] == "help": + wks_file = args[0] + fullpath = find_canned_image(scripts_path, wks_file) + if not fullpath: + print "No image named %s found, exiting. (Use 'wic list images' to list available images, or specify a fully-qualified OE kickstart (.wks) filename)\n" % wks_file + sys.exit(1) + list_canned_image_help(scripts_path, fullpath) + return True + else: + return False + + return False |