buildman: Add -C option to force a reconfigure for each commit

Normally buildman wil try to configure U-Boot for a particular board on the
first commit that it builds in a series. Subsequent commits are built
without reconfiguring which normally works. Where it doesn't, buildman
automatically reconfigures and retries.

To fully emulate the way MAKEALL works, we should have an option to disable
this optimisation.

Add a -C option to cause buildman to always reconfigure on each commit.

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

tools/buildman/builder.py

@@ -431,7 +431,8 @@ class BuilderThread(threading.Thread):
                         result, request_config = self.RunCommit(commit_upto,
                             brd, work_dir, True, True, False)
                         did_config = True
-                do_config = request_config
+                if not self.builder.force_reconfig:
+                    do_config = request_config
 
                 # If we built that commit, then config is done. But if we got
                 # an warning, reconfig next time to force it to build the same
@@ -524,6 +525,12 @@ class Builder:
         toolchains: Toolchains object to use for building
         upto: Current commit number we are building (0.count-1)
         warned: Number of builds that produced at least one warning
+        force_reconfig: Reconfigure U-Boot on each comiit. This disables
+            incremental building, where buildman reconfigures on the first
+            commit for a baord, and then just does an incremental build for
+            the following commits. In fact buildman will reconfigure and
+            retry for any failing commits, so generally the only effect of
+            this option is to slow things down.
 
     Private members:
         _base_board_dict: Last-summarised Dict of boards
@@ -593,6 +600,7 @@ class Builder:
         self._next_delay_update = datetime.now()
         self.force_config_on_failure = True
         self.force_build_failures = False
+        self.force_reconfig = False
         self._step = step
 
         self.col = terminal.Color()

tools/buildman/buildman.py

@@ -67,6 +67,9 @@ parser.add_option('-B', '--bloat', dest='show_bloat',
        help='Show changes in function code size for each board')
 parser.add_option('-c', '--count', dest='count', type='int',
        default=-1, help='Run build on the top n commits')
+parser.add_option('-C', '--force-reconfig', dest='force_reconfig',
+       action='store_true', default=False,
+       help='Reconfigure for every commit (disable incremental build)')
 parser.add_option('-e', '--show_errors', action='store_true',
        default=False, help='Show errors and warnings')
 parser.add_option('-f', '--force-build', dest='force_build',

tools/buildman/control.py

@@ -157,6 +157,7 @@ def DoBuildman(options, args):
     else:
         builder.force_build = options.force_build
         builder.force_build_failures = options.force_build_failures
+        builder.force_reconfig = options.force_reconfig
 
         # Work out which boards to build
         board_selected = boards.GetSelectedDict()