bitbake: lib/bb/event: refactor printing events

We really ought to have just one place where the string representation
of these events is produced. This doesn't take any real control away
from the UI - if an alternative representation is desired, that can
still be made.

(Bitbake rev: cb15db2a799be6d8eab9a2a43a9a573f89229cff)

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

bitbake/lib/bb/event.py

@@ -521,6 +521,28 @@ class NoProvider(Event):
     def isRuntime(self):
         return self._runtime
 
+    def __str__(self):
+        msg = ''
+        if self._runtime:
+            r = "R"
+        else:
+            r = ""
+
+        extra = ''
+        if not self._reasons:
+            if self._close_matches:
+                extra = ". Close matches:\n  %s" % '\n  '.join(self._close_matches)
+
+        if self._dependees:
+            msg = "Nothing %sPROVIDES '%s' (but %s %sDEPENDS on or otherwise requires it)%s" % (r, self._item, ", ".join(self._dependees), r, extra)
+        else:
+            msg = "Nothing %sPROVIDES '%s'%s" % (r, self._item, extra)
+        if self._reasons:
+            for reason in self._reasons:
+                msg += '\n' + reason
+        return msg
+
+
 class MultipleProviders(Event):
     """Multiple Providers"""
 
@@ -548,6 +570,16 @@ class MultipleProviders(Event):
         """
         return self._candidates
 
+    def __str__(self):
+        msg = "Multiple providers are available for %s%s (%s)" % (self._is_runtime and "runtime " or "",
+                            self._item,
+                            ", ".join(self._candidates))
+        rtime = ""
+        if self._is_runtime:
+            rtime = "R"
+        msg += "\nConsider defining a PREFERRED_%sPROVIDER entry to match %s" % (rtime, self._item)
+        return msg
+
 class ParseStarted(OperationStarted):
     """Recipe parsing for the runqueue has begun"""
     def __init__(self, total):