tools, scripts: refactor error-out statements of Python scripts

In Python, sys.exit() function can also take an object other
than an integer.

If an integer is given to the argument, Python exits with the return
code of it.  If a non-integer argument is given, Python outputs it
to stderr and exits with the return code of 1.

That means,

    print >> sys.stderr, "Blah Blah"
    sys.exit(1)

is equivalent to

    sys.exit("Blah Blah")

The latter is a useful shorthand.

Note:
Some error messages in Buildman and Patman were output to stdout.
But they should go to stderr.  They are also fixed by this commit.
This is a nice side effect.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>

2 files changed, 3 insertions, 5 deletions

diff --git a/tools/patman/checkpatch.py b/tools/patman/checkpatch.py
index 0d4e9352447..34a3bd22b08 100644
--- a/tools/patman/checkpatch.py
+++ b/tools/patman/checkpatch.py
@@ -34,9 +34,8 @@ def FindCheckPatch():
             return fname
         path = os.path.dirname(path)
 
-    print >> sys.stderr, ('Cannot find checkpatch.pl - please put it in your ' +
-                '~/bin directory or use --no-check')
-    sys.exit(1)
+    sys.exit('Cannot find checkpatch.pl - please put it in your ' +
+             '~/bin directory or use --no-check')
 
 def CheckPatch(fname, verbose=False):
     """Run checkpatch.pl on a file.
diff --git a/tools/patman/patman.py b/tools/patman/patman.py
index c60aa5a1c45..ba5dc91315b 100755
--- a/tools/patman/patman.py
+++ b/tools/patman/patman.py
@@ -122,8 +122,7 @@ else:
     col = terminal.Color()
     if not options.count:
         str = 'No commits found to process - please use -c flag'
-        print col.Color(col.RED, str)
-        sys.exit(1)
+        sys.exit(col.Color(col.RED, str))
 
     # Read the metadata from the commits
     if options.count: