bitbake: parse: Add include_all conf file directive

In some cases it would be helpful to be able to have an include file
in a standard location which is included in all layers that are added
to the system. The intent is for these to provide configuration tweaks
of specific types so that a given file pattern can be adopted more widely
for such configuration.

The code will search for any named configuration file within BBPATH, so
a configuration directive of:

include_all conf/distro/include/myinc.conf

would include the myinc.conf file in that subpath if present in any
directory in BBPATH. Multiple files will be included if present.

(Bitbake rev: d01d5593e7829ac60f37bc23cb87dc6917026471)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/parse/ast.py

@@ -43,6 +43,21 @@ class IncludeNode(AstNode):
         else:
             bb.parse.ConfHandler.include(self.filename, s, self.lineno, data, False)
 
+class IncludeAllNode(AstNode):
+    def __init__(self, filename, lineno, what_file):
+        AstNode.__init__(self, filename, lineno)
+        self.what_file = what_file
+
+    def eval(self, data):
+        """
+        Include the file and evaluate the statements
+        """
+        s = data.expand(self.what_file)
+        logger.debug2("CONF %s:%s: including %s", self.filename, self.lineno, s)
+
+        for path in data.getVar("BBPATH").split(":"):
+            bb.parse.ConfHandler.include(self.filename, os.path.join(path, s), self.lineno, data, False)
+
 class ExportNode(AstNode):
     def __init__(self, filename, lineno, var):
         AstNode.__init__(self, filename, lineno)
@@ -366,6 +381,9 @@ class AddFragmentsNode(AstNode):
 def handleInclude(statements, filename, lineno, m, force):
     statements.append(IncludeNode(filename, lineno, m.group(1), force))
 
+def handleIncludeAll(statements, filename, lineno, m):
+    statements.append(IncludeAllNode(filename, lineno, m.group(1)))
+
 def handleExport(statements, filename, lineno, m):
     statements.append(ExportNode(filename, lineno, m.group(1)))