bitbake: utils: add optional callback to edit_bblayers_conf()

Add a callback that lets you modify or remove items in addition to the
current scheme where you can only add or remove. This enables you to for
example replace a layer with a temporary copy (which is what we will use
this for first in OE's oe-selftest).

(Bitbake rev: bfedb4e85a84e817dbe5d8694b8f8fcdd6f2f22a)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 14 insertions, 1 deletions

diff --git a/bitbake/lib/bb/utils.py b/bitbake/lib/bb/utils.py
index 378e699e0c..9903183213 100644
--- a/bitbake/lib/bb/utils.py
+++ b/bitbake/lib/bb/utils.py
@@ -1285,7 +1285,7 @@ def edit_metadata_file(meta_file, variables, varfunc):
     return updated
 
 
-def edit_bblayers_conf(bblayers_conf, add, remove):
+def edit_bblayers_conf(bblayers_conf, add, remove, edit_cb=None):
     """Edit bblayers.conf, adding and/or removing layers
     Parameters:
         bblayers_conf: path to bblayers.conf file to edit
@@ -1293,6 +1293,8 @@ def edit_bblayers_conf(bblayers_conf, add, remove):
             list to add nothing
         remove: layer path (or list of layer paths) to remove; None or
             empty list to remove nothing
+        edit_cb: optional callback function that will be called after
+            processing adds/removes once per existing entry.
     Returns a tuple:
         notadded: list of layers specified to be added but weren't
             (because they were already in the list)
@@ -1356,6 +1358,17 @@ def edit_bblayers_conf(bblayers_conf, add, remove):
                     bblayers.append(addlayer)
             del addlayers[:]
 
+        if edit_cb:
+            newlist = []
+            for layer in bblayers:
+                res = edit_cb(layer, canonicalise_path(layer))
+                if res != layer:
+                    newlist.append(res)
+                    updated = True
+                else:
+                    newlist.append(layer)
+            bblayers = newlist
+
         if updated:
             if op == '+=' and not bblayers:
                 bblayers = None