devtool: add basic means of running runqemu within the extensible SDK

We ship the runqemu script and if we build QEMU itself within the
extensible SDK, then it would be nice to be able to run it. This is a
very thin wrapper around runqemu, supplying the machine and image name
so the user doesn't need to. (This subcommand is only available within
the extensible SDK since it only really makes sense there where it is
otherwise hard to run runqemu directly.)

Implements [YOCTO #6657].

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/scripts/lib/devtool/runqemu.py b/scripts/lib/devtool/runqemu.py
new file mode 100644
index 0000000000..e7f26ab6d8
--- /dev/null
+++ b/scripts/lib/devtool/runqemu.py
@@ -0,0 +1,64 @@
+# Development tool - runqemu command plugin
+#
+# Copyright (C) 2015 Intel Corporation
+#
+# 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.
+
+"""Devtool runqemu plugin"""
+
+import os
+import bb
+import logging
+import argparse
+import glob
+from devtool import exec_build_env_command, setup_tinfoil, DevtoolError
+
+logger = logging.getLogger('devtool')
+
+def runqemu(args, config, basepath, workspace):
+    """Entry point for the devtool 'runqemu' subcommand"""
+
+    tinfoil = setup_tinfoil()
+    machine = tinfoil.config_data.getVar('MACHINE', True)
+    bindir_native = tinfoil.config_data.getVar('STAGING_BINDIR_NATIVE', True)
+    tinfoil.shutdown()
+
+    if not glob.glob(os.path.join(bindir_native, 'qemu-system-*')):
+        raise DevtoolError('QEMU is not available within this SDK')
+
+    imagename = args.imagename
+    if not imagename:
+        sdk_targets = config.get('SDK', 'sdk_targets', '').split()
+        if sdk_targets:
+            imagename = sdk_targets[0]
+    if not imagename:
+        raise DevtoolError('Unable to determine image name to run, please specify one')
+
+    try:
+        exec_build_env_command(config.init_path, basepath, 'runqemu %s %s %s' % (machine, imagename, " ".join(args.args)), watch=True)
+    except bb.process.ExecutionError as e:
+        # We've already seen the output since watch=True, so just ensure we return something to the user
+        return e.exitcode
+
+    return 0
+
+def register_commands(subparsers, context):
+    """Register devtool subcommands from this plugin"""
+    if context.fixed_setup:
+        parser_runqemu = subparsers.add_parser('runqemu', help='Run QEMU on the specified image',
+                                               description='Runs QEMU to boot the specified image')
+        parser_runqemu.add_argument('imagename', help='Name of built image to boot within QEMU', nargs='?')
+        parser_runqemu.add_argument('args', help='Any remaining arguments are passed to the runqemu script (pass --help after imagename to see what these are)',
+                                    nargs=argparse.REMAINDER)
+        parser_runqemu.set_defaults(func=runqemu)