wic: Add OpenEmbedded-specific implementation

Reuses the mic/livecd infrastructure but heavily subclasses and
modifies it to adapt to the special needs of building images from
existing OpenEmbedded build artifacts.

In addition to the OE-specific mic objects and modifications to the
underlying infrastructure, this adds a mechanism to allow OE kickstart
files to be 'canned' and made available to users via the 'wic list
images' command.

Two initial OE kickstart files have been added as canned .wks files:
directdisk, which implements the same thing as the images created by
directdisk.bbclass, and mkefidisk, which can essentially be used as a
replacement for mkefidisk.sh.  Of course, since creation of these
images are now driven by .wks files rather than being hard-coded into
class files or scripts, they can be easily modified to generate
different variations on those images.  They also don't require root
priveleges, since they don't use mount to create the images.  They
don't however write to media like mkefidisk.sh does, but rather create
images that can be written onto media.

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, 108 insertions, 0 deletions

diff --git a/scripts/lib/mic/utils/oe/misc.py b/scripts/lib/mic/utils/oe/misc.py
new file mode 100644
index 0000000000..9edaa230e4
--- /dev/null
+++ b/scripts/lib/mic/utils/oe/misc.py
@@ -0,0 +1,108 @@
+# 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 provides a place to collect various mic-related utils
+# for the OpenEmbedded Image Tools.
+#
+# AUTHORS
+# Tom Zanussi <tom.zanussi (at] linux.intel.com>
+#
+
+from mic import msger
+from mic.utils import runner
+
+def exec_cmd(cmd_and_args, as_shell = False, catch = 3):
+    """
+    Execute command, catching stderr, stdout
+
+    Need to execute as_shell if the command uses wildcards
+    """
+    msger.debug("exec_cmd: %s" % cmd_and_args)
+    args = cmd_and_args.split()
+    msger.debug(args)
+
+    if (as_shell):
+        rc, out = runner.runtool(cmd_and_args, catch)
+    else:
+        rc, out = runner.runtool(args, catch)
+    out = out.strip()
+    msger.debug("exec_cmd: output for %s (rc = %d): %s" % \
+                    (cmd_and_args, rc, out))
+
+    if rc != 0:
+        # We don't throw exception when return code is not 0, because
+        # parted always fails to reload part table with loop devices. This
+        # prevents us from distinguishing real errors based on return
+        # code.
+        msger.debug("WARNING: %s returned '%s' instead of 0" % (args[0], rc))
+
+    return (rc, out)
+
+
+def exec_cmd_quiet(cmd_and_args, as_shell = False):
+    """
+    Execute command, catching nothing in the output
+
+    Need to execute as_shell if the command uses wildcards
+    """
+    return exec_cmd(cmd_and_args, as_shell, 0)
+
+
+def exec_native_cmd(cmd_and_args, native_sysroot, catch = 3):
+    """
+    Execute native command, catching stderr, stdout
+
+    Need to execute as_shell if the command uses wildcards
+
+    Always need to execute native commands as_shell
+    """
+    native_paths = \
+        "export PATH=%s/sbin:PATH=%s/usr/sbin:PATH=%s/usr/bin:$PATH" % \
+        (native_sysroot, native_sysroot, native_sysroot)
+    native_cmd_and_args = "%s;%s" % (native_paths, cmd_and_args)
+    msger.debug("exec_native_cmd: %s" % cmd_and_args)
+
+    args = cmd_and_args.split()
+    msger.debug(args)
+
+    return exec_cmd(native_cmd_and_args, True, catch)
+
+
+def exec_native_cmd_quiet(cmd_and_args, native_sysroot):
+    """
+    Execute native command, catching nothing in the output
+
+    Need to execute as_shell if the command uses wildcards
+
+    Always need to execute native commands as_shell
+    """
+    return exec_native_cmd(cmd_and_args, native_sysroot, 0)
+
+
+# kickstart doesn't support variable substution in commands, so this
+# is our current simplistic scheme for supporting that
+
+wks_vars = dict()
+
+def get_wks_var(key):
+    return wks_vars[key]
+
+def add_wks_var(key, val):
+    wks_vars[key] = val