buildman: Implement an option to exclude boards from the build

Some boards are known to be broken and it is convenient to be able to
exclude them from the build.

Add an --exclude option to specific boards to exclude. This uses the
same matching rules as the normal 'include' arguments, and is a comma-
separated list of regular expressions.

Suggested-by: York Sun <yorksun@freescale.com>
Signed-off-by: Simon Glass <sjg@chromium.org>

4 files changed, 41 insertions, 8 deletions

diff --git a/tools/buildman/README b/tools/buildman/README
index 68465b46d9..b8c2bd6cbb 100644
--- a/tools/buildman/README
+++ b/tools/buildman/README
@@ -114,6 +114,13 @@ the '&' operator to limit the selection:
 * 'freescale & arm sandbox'  All Freescale boards with ARM architecture,
                              plus sandbox
 
+You can also use -x to specifically exclude some boards. For example:
+
+ buildmand arm -x nvidia,freescale,.*ball$
+
+means to build all arm boards except nvidia, freescale and anything ending
+with 'ball'.
+
 It is convenient to use the -n option to see whaat will be built based on
 the subset given.
 
diff --git a/tools/buildman/board.py b/tools/buildman/board.py
index a333287624..5d536d5f20 100644
--- a/tools/buildman/board.py
+++ b/tools/buildman/board.py
@@ -239,13 +239,14 @@ class Boards:
             terms.append(term)
         return terms
 
-    def SelectBoards(self, args):
+    def SelectBoards(self, args, exclude=[]):
         """Mark boards selected based on args
 
         Args:
-            List of strings specifying boards to include, either named, or
-            by their target, architecture, cpu, vendor or soc. If empty, all
-            boards are selected.
+            args: List of strings specifying boards to include, either named,
+                  or by their target, architecture, cpu, vendor or soc. If
+                  empty, all boards are selected.
+            exclude: List of boards to exclude, regardless of 'args'
 
         Returns:
             Dictionary which holds the number of boards which were selected
@@ -258,17 +259,33 @@ class Boards:
         for term in terms:
             result[str(term)] = 0
 
+        exclude_list = []
+        for expr in exclude:
+            exclude_list.append(Expr(expr))
+
         for board in self._boards:
+            matching_term = None
+            build_it = False
             if terms:
                 match = False
                 for term in terms:
                     if term.Matches(board.props):
-                        board.build_it = True
-                        result[str(term)] += 1
-                        result['all'] += 1
+                        matching_term = str(term)
+                        build_it = True
                         break
             else:
+                build_it = True
+
+            # Check that it is not specifically excluded
+            for expr in exclude_list:
+                if expr.Matches(board.props):
+                    build_it = False
+                    break
+
+            if build_it:
                 board.build_it = True
+                if matching_term:
+                    result[matching_term] += 1
                 result['all'] += 1
 
         return result
diff --git a/tools/buildman/buildman.py b/tools/buildman/buildman.py
index fbd31259bf..53592e50ec 100755
--- a/tools/buildman/buildman.py
+++ b/tools/buildman/buildman.py
@@ -117,6 +117,9 @@ parser.add_option('-u', '--show_unknown', action='store_true',
        default=False, help='Show boards with unknown build result')
 parser.add_option('-v', '--verbose', action='store_true',
        default=False, help='Show build results while the build progresses')
+parser.add_option('-x', '--exclude', dest='exclude',
+      type='string', action='append',
+      help='Specify a list of boards to exclude, separated by comma')
 
 parser.usage += """
 
diff --git a/tools/buildman/control.py b/tools/buildman/control.py
index b8a6cbfe2f..cb01158b60 100644
--- a/tools/buildman/control.py
+++ b/tools/buildman/control.py
@@ -127,7 +127,13 @@ def DoBuildman(options, args):
 
     boards = board.Boards()
     boards.ReadBoards(os.path.join(options.git, 'boards.cfg'))
-    why_selected = boards.SelectBoards(args)
+
+    exclude = []
+    if options.exclude:
+        for arg in options.exclude:
+            exclude += arg.split(',')
+
+    why_selected = boards.SelectBoards(args, exclude)
     selected = boards.GetSelected()
     if not len(selected):
         sys.exit(col.Color(col.RED, 'No matching boards found'))