In the slot collision display, show a maximum of 3 parents

for each package in order to avoid flooding the display.
(trunk r8500)

svn path=/main/branches/2.1.2/; revision=8557

diff --git a/bin/emerge b/bin/emerge
index 3366e26c45815c0ba79b859e1160e841a77e4e3d..bf1f32cd357724b1b12b88dec93398da1d6a9927 100755 (executable)
--- a/bin/emerge
+++ b/bin/emerge
@@ -1214,6 +1214,8 @@ class depgraph:
                        "package slot have been \n")
                msg.append("!!! pulled into the dependency graph:\n\n")
                indent = "  "
+               # Max number of parents shown, to avoid flooding the display.
+               max_parents = 3
                for slot_atom, root in self._slot_collision_info:
                        msg.append(slot_atom)
                        msg.append("\n\n")
@@ -1233,11 +1235,23 @@ class depgraph:
                                msg.append(str(node))
                                parents = self._parent_child_digraph.parent_nodes(node)
                                if parents:
+                                       omitted_parents = 0
+                                       if len(parents) > max_parents:
+                                               omitted_parents = len(parents) - max_parents
+                                               pruned_list = []
+                                               for parent in parents:
+                                                       pruned_list.append(parent)
+                                                       if len(pruned_list) == max_parents:
+                                                               break
+                                               parents = pruned_list
                                        msg.append(" pulled in by\n")
                                        for parent in parents:
                                                msg.append(2*indent)
                                                msg.append(str(parent))
                                                msg.append("\n")
+                                       if omitted_parents:
+                                               msg.append(2*indent)
+                                               msg.append("(and %d more)\n" % omitted_parents)
                                else:
                                        msg.append(" (no parents)\n")
                                msg.append("\n")