bitbake: main: add skeleton documentation for the recipe:do_task syntax

The incredibly useful recipe:do_task syntax on the command line isn't documented
at all.  This isn't much but it's better than nothing.

(Bitbake rev: 7f4c07886ecff4ac77fdd2165bedd179099fcf19)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/bitbake/lib/bb/main.py b/bitbake/lib/bb/main.py
index 49dc8d5b59..ee72328f4e 100755
--- a/bitbake/lib/bb/main.py
+++ b/bitbake/lib/bb/main.py
@@ -83,7 +83,7 @@ class BitBakeConfigParameters(cookerdata.ConfigParameters):
     def parseCommandLine(self, argv=sys.argv):
         parser = optparse.OptionParser(
             version = "BitBake Build Tool Core version %s" % bb.__version__,
-            usage = """%prog [options] [recipename/target ...]
+            usage = """%prog [options] [recipename/target recipe:do_task ...]
 
     Executes the specified task (default is 'build') for a given set of target recipes (.bb files).
     It is assumed there is a conf/bblayers.conf available in cwd or in BBPATH which