[OE-core] [PATCH 2/6] yocto-compat-layer.py: tolerate broken world builds during signature diff

[Patrick Ohly]

The "test_signatures" test ignored a broken world build when getting
signatures, but the code which then tried to analyze a difference
found by the test didn't, which prevented printing the difference.

Signed-off-by: Patrick Ohly <patrick.ohly at intel.com>
---
 scripts/lib/compatlayer/__init__.py     | 7 ++++++-
 scripts/lib/compatlayer/cases/common.py | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/scripts/lib/compatlayer/__init__.py b/scripts/lib/compatlayer/__init__.py
index eaae4e5..451e1de 100644
--- a/scripts/lib/compatlayer/__init__.py
+++ b/scripts/lib/compatlayer/__init__.py
@@ -290,7 +290,7 @@ def get_signatures(builddir, failsafe=False, machine=None):
 
     return (sigs, tune2tasks)
 
-def get_depgraph(targets=['world']):
+def get_depgraph(targets=['world'], failsafe=False):
     '''
     Returns the dependency graph for the given target(s).
     The dependency graph is taken directly from DepTreeEvent.
@@ -309,6 +309,11 @@ def get_depgraph(targets=['world']):
                 elif isinstance(event, bb.command.CommandCompleted):
                     break
                 elif isinstance(event, bb.event.NoProvider):
+                    if failsafe:
+                        # The event is informational, we will get information about the
+                        # remaining dependencies eventually and thus can ignore this
+                        # here like we do in get_signatures(), if desired.
+                        continue
                     if event._reasons:
                         raise RuntimeError('Nothing provides %s: %s' % (event._item, event._reasons))
                     else:
diff --git a/scripts/lib/compatlayer/cases/common.py b/scripts/lib/compatlayer/cases/common.py
index 8eeada9..2dfcbb1 100644
--- a/scripts/lib/compatlayer/cases/common.py
+++ b/scripts/lib/compatlayer/cases/common.py
@@ -50,7 +50,7 @@ class CommonCompatLayer(OECompatLayerTestCase):
             def graph2sig(task):
                 pn, taskname = task.rsplit('.', 1)
                 return pn + ':' + taskname
-            depgraph = get_depgraph()
+            depgraph = get_depgraph(failsafe=True)
             depends = depgraph['tdepends']
 
             # If a task A has a changed signature, but none of its
-- 
git-series 0.9.1