devtool: add build-sdk subcommand

Add a build-sdk command which is only available within the extensible
SDK that builds a derivative extensible SDK. The idea is recipes in the
workspace become a part of the new SDK - for example, this allows taking
a vendor provided SDK, adding a few libs and then producing a new SDK
with those included.

When normally building the extensible SDK, the workspace is excluded;
here we need to copy into the new SDK (renaming it in the process); the
recipes' task signatures become locked and thus the sources are no
longer needed, so they are removed along with the workspace bbappends
which would interfere with the locked signatures. Additionally we need
to just copy the configuration files (i.e. local.conf and auto.conf)
rather than filtering and appending to them since that work has already
been done when constructing the original SDK. The extra sstate artifacts
from workspace recipes are also determined and copied into the new SDK
in minimal mode (on the assumption that you won't set up a new sstate
mirror).

This reuses some code from build-image, so that needed to be
generalised to allow that.

Implements [YOCTO #8892].

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

2 files changed, 122 insertions, 22 deletions

diff --git a/scripts/lib/devtool/build_image.py b/scripts/lib/devtool/build_image.py
index ff764fa833..e51d766474 100644
--- a/scripts/lib/devtool/build_image.py
+++ b/scripts/lib/devtool/build_image.py
@@ -25,6 +25,9 @@ from devtool import exec_build_env_command, setup_tinfoil, parse_recipe, Devtool
 
 logger = logging.getLogger('devtool')
 
+class TargetNotImageError(Exception):
+    pass
+
 def _get_packages(tinfoil, workspace, config):
     """Get list of packages from recipes in the workspace."""
     result = []
@@ -51,6 +54,24 @@ def build_image(args, config, basepath, workspace):
     if not image:
         raise DevtoolError('Unable to determine image to build, please specify one')
 
+    try:
+        if args.add_packages:
+            add_packages = args.add_packages.split(',')
+        else:
+            add_packages = None
+        result, outputdir = build_image_task(config, basepath, workspace, image, add_packages)
+    except TargetNotImageError:
+        if auto_image:
+            raise DevtoolError('Unable to determine image to build, please specify one')
+        else:
+            raise DevtoolError('Specified recipe %s is not an image recipe' % image)
+
+    if result == 0:
+        logger.info('Successfully built %s. You can find output files in %s'
+                    % (image, outputdir))
+    return result
+
+def build_image_task(config, basepath, workspace, image, add_packages=None, task=None, extra_append=None):
     appendfile = os.path.join(config.workspace_path, 'appends',
                               '%s.bbappend' % image)
 
@@ -63,46 +84,60 @@ def build_image(args, config, basepath, workspace):
     rd = parse_recipe(config, tinfoil, image, True)
     if not rd:
         # Error already shown
-        return 1
+        return (1, None)
     if not bb.data.inherits_class('image', rd):
-        if auto_image:
-            raise DevtoolError('Unable to determine image to build, please specify one')
-        else:
-            raise DevtoolError('Specified recipe %s is not an image recipe' % image)
+        raise TargetNotImageError()
 
+    outputdir = None
     try:
-        if workspace or args.add_packages:
-            if args.add_packages:
-                packages = args.add_packages.split(',')
+        if workspace or add_packages:
+            if add_packages:
+                packages = add_packages
             else:
                 packages = _get_packages(tinfoil, workspace, config)
-            if packages:
-                with open(appendfile, 'w') as afile:
+        else:
+            packages = None
+        if not task:
+            if not packages and not add_packages and workspace:
+                logger.warning('No recipes in workspace, building image %s unmodified', image)
+            elif not packages:
+                logger.warning('No packages to add, building image %s unmodified', image)
+
+        if packages or extra_append:
+            bb.utils.mkdirhier(os.path.dirname(appendfile))
+            with open(appendfile, 'w') as afile:
+                if packages:
                     # include packages from workspace recipes into the image
                     afile.write('IMAGE_INSTALL_append = " %s"\n' % ' '.join(packages))
-                    logger.info('Building image %s with the following '
-                                'additional packages: %s', image, ' '.join(packages))
-            else:
-                logger.warning('No packages to add, building image %s unmodified', image)
+                    if not task:
+                        logger.info('Building image %s with the following '
+                                    'additional packages: %s', image, ' '.join(packages))
+                if extra_append:
+                    for line in extra_append:
+                        afile.write('%s\n' % line)
+
+        if task in ['populate_sdk', 'populate_sdk_ext']:
+            outputdir = rd.getVar('SDK_DEPLOY', True)
         else:
-            logger.warning('No recipes in workspace, building image %s unmodified', image)
-
-        deploy_dir_image = tinfoil.config_data.getVar('DEPLOY_DIR_IMAGE', True)
+            outputdir = rd.getVar('DEPLOY_DIR_IMAGE', True)
 
         tinfoil.shutdown()
 
-        # run bitbake to build image
+        options = ''
+        if task:
+            options += '-c %s' % task
+
+        # run bitbake to build image (or specified task)
         try:
             exec_build_env_command(config.init_path, basepath,
-                                'bitbake %s' % image, watch=True)
+                                   'bitbake %s %s' % (options, image), watch=True)
         except ExecutionError as err:
-            return err.exitcode
+            return (err.exitcode, None)
     finally:
         if os.path.isfile(appendfile):
             os.unlink(appendfile)
+    return (0, outputdir)
 
-    logger.info('Successfully built %s. You can find output files in %s'
-                % (image, deploy_dir_image))
 
 def register_commands(subparsers, context):
     """Register devtool subcommands from the build-image plugin"""
diff --git a/scripts/lib/devtool/build_sdk.py b/scripts/lib/devtool/build_sdk.py
new file mode 100644
index 0000000000..b89d65b0cb
--- /dev/null
+++ b/scripts/lib/devtool/build_sdk.py
@@ -0,0 +1,65 @@
+# Development tool - build-sdk command plugin
+#
+# Copyright (C) 2015-2016 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.
+
+import os
+import subprocess
+import logging
+import glob
+import shutil
+import errno
+import sys
+import tempfile
+from devtool import exec_build_env_command, setup_tinfoil, parse_recipe, DevtoolError
+from devtool import build_image
+
+logger = logging.getLogger('devtool')
+
+
+def build_sdk(args, config, basepath, workspace):
+    """Entry point for the devtool build-sdk command"""
+
+    sdk_targets = config.get('SDK', 'sdk_targets', '').split()
+    if sdk_targets:
+        image = sdk_targets[0]
+    else:
+        raise DevtoolError('Unable to determine image to build SDK for')
+
+    extra_append = ['SDK_DERIVATIVE = "1"']
+    try:
+        result, outputdir = build_image.build_image_task(config,
+                                                         basepath,
+                                                         workspace,
+                                                         image,
+                                                         task='populate_sdk_ext',
+                                                         extra_append=extra_append)
+    except build_image.TargetNotImageError:
+        raise DevtoolError('Unable to determine image to build SDK for')
+
+    if result == 0:
+        logger.info('Successfully built SDK. You can find output files in %s'
+                    % outputdir)
+    return result
+
+
+def register_commands(subparsers, context):
+    """Register devtool subcommands"""
+    if context.fixed_setup:
+        parser_build_sdk = subparsers.add_parser('build-sdk',
+                                                 help='Build a derivative SDK of this one',
+                                                 description='Builds an extensible SDK based upon this one and the items in your workspace',
+                                                 group='advanced')
+        parser_build_sdk.set_defaults(func=build_sdk)