[OE-core] [PATCH 1/1] build.py: add clean option to 'devtool build' command

[Chen Qi]

Add -c (--clean) optiont to 'devtool build' command so that users
could easily clean things up when using devtool.

I encountered a problem about do_prepare_recipe_sysroot failure
when using `devtool build' command and I found myself in a situation
where I either have to use `bitbake' command to clean things up or
use `rm' to remove the directories under ${WORKDIR}.

So add a clean option as it would be helpful when users want to clean
things up to prepare an environment for a clean build.

Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
---
 scripts/lib/devtool/build.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/lib/devtool/build.py b/scripts/lib/devtool/build.py
index 252379e..ba9593f 100644
--- a/scripts/lib/devtool/build.py
+++ b/scripts/lib/devtool/build.py
@@ -54,7 +54,11 @@ def build(args, config, basepath, workspace):
     """Entry point for the devtool 'build' subcommand"""
     workspacepn = check_workspace_recipe(workspace, args.recipename, bbclassextend=True)
 
-    build_tasks = _get_build_tasks(config)
+    if args.clean:
+        # use clean instead of cleansstate to avoid messing things up in eSDK
+        build_tasks = ['do_clean']
+    else:
+        build_tasks = _get_build_tasks(config)
 
     bbappend = workspace[workspacepn]['bbappend']
     if args.disable_parallel_make:
@@ -83,4 +87,5 @@ def register_commands(subparsers, context):
                                          group='working', order=50)
     parser_build.add_argument('recipename', help='Recipe to build')
     parser_build.add_argument('-s', '--disable-parallel-make', action="store_true", help='Disable make parallelism')
+    parser_build.add_argument('-c', '--clean', action='store_true', help='clean up recipe building results')
     parser_build.set_defaults(func=build)
-- 
1.9.1