[gnome-continuous-yocto/gnomeostree-3.28-rocko: 5579/8267] bitbake: bitbake-diffsigs: fix traceback with no arguments

[Emmanuele Bassi <ebassi src gnome org>]

commit f187553b6db7832a14b58ce6aa1801711ab9ff4d
Author: Paul Eggleton <paul eggleton linux intel com>
Date:   Tue Apr 11 10:35:39 2017 +1200

    bitbake: bitbake-diffsigs: fix traceback with no arguments
    
    In the move over to argparse we've made the two signature file arguments
    optional and thus if -t is not in use we need to explicitly check if at
    least one signature file has been specified - and if not, show an error
    and the command-line help.
    
    (Bitbake rev: 9011366689b26305281fcb2d412dcacece917e18)
    
    Signed-off-by: Paul Eggleton <paul eggleton linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 bitbake/bin/bitbake-diffsigs |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/bitbake/bin/bitbake-diffsigs b/bitbake/bin/bitbake-diffsigs
index 884be1e..eb2f859 100755
--- a/bitbake/bin/bitbake-diffsigs
+++ b/bitbake/bin/bitbake-diffsigs
@@ -147,6 +147,10 @@ else:
             output = bb.siggen.compare_sigfiles(options.sigdatafile1, options.sigdatafile2, color=color)
         elif options.sigdatafile1:
             output = bb.siggen.dump_sigfile(options.sigdatafile1)
+        else:
+            logger.error('Must specify signature file(s) or -t/--task')
+            parser.print_help()
+            sys.exit(1)
     except IOError as e:
         logger.error(str(e))
         sys.exit(1)