bitbake-layers: improve show-overlayed output

Make the following improvements to the show-overlayed subcommand:

* Show recipes that are overlayed when the version is higher or lower,
  not just when it is the same. This gives a much better picture of the
  influence each layer is having over the metadata used for building.
  This can be disabled with the -s option if you just want to see
  recipes with the same version as before.
* Default to showing name (PN), layer and version rather than the full
  path and filename. The old style formatting can be used by specifying
  the -f option.
* Mark skipped recipes as such in the output, and print them in the
  correct sorted place in the list rather than at the end
* Prefix/suffix title line with === so it can be filtered out easily in
  shell scripts if desired

(Bitbake rev: 43b473275d3cb2e60a14e4a52cdc4654b3f4e5e7)

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

bitbake/lib/bb/providers.py

@@ -24,6 +24,7 @@
 import re
 import logging
 from bb import data, utils
+from collections import defaultdict
 import bb
 
 logger = logging.getLogger("BitBake.Provider")
@@ -35,6 +36,41 @@ class NoRProvider(bb.BBHandledException):
     """Exception raised when no provider of a runtime dependency can be found"""
 
 
+def findProviders(cfgData, dataCache, pkg_pn = None):
+    """
+    Convenience function to get latest and preferred providers in pkg_pn
+    """
+
+    if not pkg_pn:
+        pkg_pn = dataCache.pkg_pn
+
+    # Need to ensure data store is expanded
+    localdata = data.createCopy(cfgData)
+    bb.data.update_data(localdata)
+    bb.data.expandKeys(localdata)
+
+    preferred_versions = {}
+    latest_versions = {}
+
+    for pn in pkg_pn:
+        (last_ver, last_file, pref_ver, pref_file) = findBestProvider(pn, localdata, dataCache, pkg_pn)
+        preferred_versions[pn] = (pref_ver, pref_file)
+        latest_versions[pn] = (last_ver, last_file)
+
+    return (latest_versions, preferred_versions)
+
+
+def allProviders(dataCache):
+    """
+    Find all providers for each pn
+    """
+    all_providers = defaultdict(list)
+    for (fn, pn) in dataCache.pkg_fn.items():
+        ver = dataCache.pkg_pepvpr[fn]
+        all_providers[pn].append((ver, fn))
+    return all_providers
+
+
 def sortPriorities(pn, dataCache, pkg_pn = None):
     """
     Reorder pkg_pn by file priority and default preference