wic: Initial code for wic (OpenEmbedded Image Creator)

Initial implementation of the 'wic' command.

The 'wic' command generates partitioned images from existing
OpenEmbedded build artifacts.  Image generation is driven by
partitioning commands contained in an 'Openembedded kickstart' (.wks)
file specified either directly on the command-line or as one of a
selection of canned .wks files (see 'wic list images').  When applied
to a given set of build artifacts, the result is an image or set of
images that can be directly written onto media and used on a
particular system.

'wic' is based loosely on the 'mic' (Meego Image Creator) framework,
but heavily modified to make direct use of OpenEmbedded build
artifacts instead of package installation and configuration, things
already incorporated int the OE artifacts.

The name 'wic' comes from 'oeic' with the 'oe' diphthong promoted to
the letter 'w', because 'oeic' is impossible to remember or pronounce.

This covers the mechanics of invoking and providing help for the
command and sub-commands; it contains hooks for future commits to
connect with the actual functionality, once implemented.

Help is integrated into the 'wic' command - see that for details on
usage.

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 185 insertions, 0 deletions

diff --git a/scripts/wic b/scripts/wic
new file mode 100755
index 0000000000..06e72bbfda
--- /dev/null
+++ b/scripts/wic
@@ -0,0 +1,185 @@
+#!/usr/bin/env python
+# 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 '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__ = "0.1.0"
+
+import os
+import sys
+import optparse
+import logging
+
+scripts_path = os.path.abspath(os.path.dirname(os.path.abspath(sys.argv[0])))
+lib_path = scripts_path + '/lib'
+sys.path = sys.path + [lib_path]
+
+from image.help import *
+from image.engine import *
+
+
+def wic_create_subcommand(args, usage_str):
+    """
+    Command-line handling for image creation.  The real work is done
+    by image.engine.wic_create()
+    """
+    parser = optparse.OptionParser(usage = usage_str)
+
+    parser.add_option("-o", "--outdir", dest = "outdir",
+                      action = "store", help = "name of directory to create image in")
+    parser.add_option("-i", "--infile", dest = "properties_file",
+                      action = "store", help = "name of file containing the values for image properties as a JSON file")
+    parser.add_option("-e", "--image-name", dest = "image_name",
+                      action = "store", help = "name of the image to use the artifacts from e.g. core-image-sato")
+    parser.add_option("-r", "--rootfs-dir", dest = "rootfs_dir",
+                      action = "store", help = "path to the /rootfs dir to use as the .wks rootfs source")
+    parser.add_option("-b", "--bootimg-dir", dest = "bootimg_dir",
+                      action = "store", help = "path to the dir containing the boot artifacts (e.g. /EFI or /syslinux dirs) to use as the .wks bootimg source")
+    parser.add_option("-k", "--kernel-dir", dest = "kernel_dir",
+                      action = "store", help = "path to the dir containing the kernel to use in the .wks bootimg")
+    parser.add_option("-n", "--native-sysroot", dest = "native_sysroot",
+                      action = "store", help = "path to the native sysroot containing the tools to use to build the image")
+    parser.add_option("-p", "--skip-build-check", dest = "build_check",
+                      action = "store_false", default = True, help = "skip the build check")
+
+    (options, args) = parser.parse_args(args)
+
+    if len(args) != 1:
+        logging.error("Wrong number of arguments, exiting\n")
+        parser.print_help()
+        sys.exit(1)
+
+    if not options.image_name:
+        options.build_check = False
+
+    if options.build_check and not options.properties_file:
+        print "Checking basic build environment..."
+        if not verify_build_env():
+            print "Couldn't verify build environment, exiting\n"
+            sys.exit(1)
+        else:
+            print "Done.\n"
+
+    print "Creating image(s)...\n"
+
+    bootimg_dir = staging_data_dir = hdddir = ""
+
+    if options.image_name:
+        (rootfs_dir, kernel_dir, hdddir, staging_data_dir, native_sysroot) = \
+            find_artifacts(options.image_name)
+
+    wks_file = args[0]
+
+    if not wks_file.endswith(".wks"):
+        wks_file = find_canned_image(scripts_path, wks_file)
+        if not wks_file:
+            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)
+
+    image_output_dir = ""
+    if options.outdir:
+        image_output_dir = options.outdir
+
+    if not options.image_name:
+        rootfs_dir = options.rootfs_dir
+        bootimg_dir = options.bootimg_dir
+        kernel_dir = options.kernel_dir
+        native_sysroot = options.native_sysroot
+
+    wic_create(args, wks_file, rootfs_dir, bootimg_dir, kernel_dir,
+               native_sysroot, hdddir, staging_data_dir, scripts_path,
+               image_output_dir, options.properties_file)
+
+
+def wic_list_subcommand(args, usage_str):
+    """
+    Command-line handling for listing available image properties and
+    values.  The real work is done by image.engine.wic_list()
+    """
+    parser = optparse.OptionParser(usage = usage_str)
+
+    parser.add_option("-o", "--outfile", action = "store",
+                      dest = "properties_file",
+                      help = "dump the possible values for image properties to a JSON file")
+
+    (options, args) = parser.parse_args(args)
+
+    if not wic_list(args, scripts_path, options.properties_file):
+        logging.error("Bad list arguments, exiting\n")
+        parser.print_help()
+        sys.exit(1)
+
+
+subcommands = {
+    "create": [wic_create_subcommand,
+               wic_create_usage,
+               wic_create_help],
+    "list":   [wic_list_subcommand,
+               wic_list_usage,
+               wic_list_help],
+}
+
+
+def start_logging(loglevel):
+    logging.basicConfig(filname = 'wic.log', filemode = 'w', level=loglevel)
+
+
+def main():
+    parser = optparse.OptionParser(version = "wic version %s" % __version__,
+                                   usage = wic_usage)
+
+    parser.disable_interspersed_args()
+    parser.add_option("-D", "--debug", dest = "debug", action = "store_true",
+                      default = False, help = "output debug information")
+
+    (options, args) = parser.parse_args()
+
+    loglevel = logging.INFO
+    if options.debug:
+        loglevel = logging.DEBUG
+    start_logging(loglevel)
+
+    if len(args):
+        if args[0] == "help":
+            if len(args) == 1:
+                parser.print_help()
+                sys.exit(1)
+
+    invoke_subcommand(args, parser, wic_help_usage, subcommands)
+
+
+if __name__ == "__main__":
+    try:
+        ret = main()
+    except Exception:
+        ret = 1
+        import traceback
+        traceback.print_exc(5)
+    sys.exit(ret)
+