cooker: remove command import in cooker.py

There is no direct use of command in cooker.py, and it is using
bb.command instead. Remove command in the import list.

This fixes a problem of embedded import between command.py and
cooker.py.

(Bitbake rev: c353316b2efcc7a893d6b4aa9a9647d51a6f69e3)

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/command.py

@@ -238,6 +238,17 @@ class CommandsAsync:
         command.finishAsyncCommand()
     generateTargetsTree.needcache = True
 
+    def findCoreBaseFiles(self, command, params):
+        """
+        Find certain files in COREBASE directory. i.e. Layers
+        """
+        subdir = params[0]
+        filename = params[1]
+
+        command.cooker.findCoreBaseFiles(subdir, filename)
+        command.finishAsyncCommand()
+    findCoreBaseFiles.needcache = False
+
     def findConfigFiles(self, command, params):
         """
         Find config files which provide appropriate values

bitbake/lib/bb/cooker.py

@@ -641,6 +641,18 @@ class BBCooker:
             if regex in unmatched:
                 collectlog.warn("No bb files matched BBFILE_PATTERN_%s '%s'" % (collection, pattern))
 
+    def findCoreBaseFiles(self, subdir, configfile):
+        corebase = self.configuration.data.getVar('COREBASE', True) or ""
+        paths = []
+        for root, dirs, files in os.walk(corebase + '/' + subdir):
+            for d in dirs:
+                configfilepath = os.path.join(root, d, configfile)
+                if os.path.exists(configfilepath):
+                    paths.append(os.path.join(root, d))
+
+        if paths:
+            bb.event.fire(bb.event.CoreBaseFilesFound(paths), self.configuration.data)
+
     def findConfigFilePath(self, configfile):
         """
         Find the location on disk of configfile and if it exists and was parsed by BitBake

bitbake/lib/bb/event.py

@@ -402,6 +402,14 @@ class FilesMatchingFound(Event):
         self._pattern = pattern
         self._matches = matches
 
+class CoreBaseFilesFound(Event):
+    """
+    Event when a list of appropriate config files has been generated
+    """
+    def __init__(self, paths):
+        Event.__init__(self)
+        self._paths = paths
+
 class ConfigFilesFound(Event):
     """
     Event when a list of appropriate config files has been generated