buildman: Make -I the default

At present buildman defaults to running 'mrproper' on every thread before
it starts building commits for each board. This can add a delay of about 5
seconds to the start of the process, since the tools and other invariants
must be rebuilt.

In particular, a build without '-b', to build current source, runs much
slower without -I, since any existing build is removed, thus losing the
possibility of an incremental build.

Partly this behaviour was to avoid strange build-system problems caused by
running 'make defconfig' for one board and then one with a different
architecture. But these problems were fixed quite a while ago.

The -I option (which disabled mrproper) was introduced four years ago and
does not seem to cause any problems with builds.

So make -I the default and deprecate the option. To allow use of
'mrproper', add a new -m flag.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/tools/buildman/control.py b/tools/buildman/control.py
index 5ddc598c952..384e62dbc56 100644
--- a/tools/buildman/control.py
+++ b/tools/buildman/control.py
@@ -172,6 +172,10 @@ def DoBuildman(options, args, toolchains=None, make_func=None, boards=None,
         print()
         return 0
 
+    if options.incremental:
+        print(col.Color(col.RED,
+                        'Warning: -I has been removed. See documentation'))
+
     # Work out what subset of the boards we are building
     if not boards:
         if not os.path.exists(options.output_dir):
@@ -309,7 +313,7 @@ def DoBuildman(options, args, toolchains=None, make_func=None, boards=None,
             show_unknown=options.show_unknown, step=options.step,
             no_subdirs=options.no_subdirs, full_path=options.full_path,
             verbose_build=options.verbose_build,
-            incremental=options.incremental,
+            mrproper=options.mrproper,
             per_board_out_dir=options.per_board_out_dir,
             config_only=options.config_only,
             squash_config_y=not options.preserve_config_y,