With --prune and --depclean, if --verbose is enabled then show reverse dependencies...

svn path=/main/trunk/; revision=7308

diff --git a/pym/emerge/__init__.py b/pym/emerge/__init__.py
index a66244e65850e5aa3e7177d2ea6cbd9918ac9999..00ba5b6f21229bd478a40a7f75cd990d1abca116 100644 (file)
--- a/pym/emerge/__init__.py
+++ b/pym/emerge/__init__.py
@@ -5335,6 +5335,7 @@ def action_depclean(settings, trees, ldpath_mtimes,
        unresolveable = {}
        aux_keys = ["DEPEND", "RDEPEND", "PDEPEND"]
        metadata_keys = ["PROVIDE", "SLOT", "USE"]
+       graph = digraph()
 
        while remaining_atoms:
                atom, parent, priority = remaining_atoms.pop()
@@ -5394,6 +5395,7 @@ def action_depclean(settings, trees, ldpath_mtimes,
                                pkgs = visible_in_portdb
                        pkgs = [portage.best(pkgs)]
                for pkg in pkgs:
+                       graph.add(pkg, parent)
                        if fakedb.cpv_exists(pkg):
                                continue
                        spinner.update()
@@ -5457,6 +5459,16 @@ def action_depclean(settings, trees, ldpath_mtimes,
                print
                return
 
+       def show_parents(child_node):
+               parent_nodes = graph.parent_nodes(child_node)
+               parent_nodes.sort()
+               msg = []
+               msg.append("  %s pulled in by:\n" % str(child_node))
+               for parent_node in parent_nodes:
+                       msg.append("    %s\n" % str(parent_node))
+               msg.append("\n")
+               portage.writemsg_stdout("".join(msg), noiselevel=-1)
+
        cleanlist = []
        if action == "depclean":
                if myfiles:
@@ -5469,8 +5481,11 @@ def action_depclean(settings, trees, ldpath_mtimes,
                                except portage.exception.InvalidDependString:
                                        # this error has already been displayed by now
                                        continue
-                               if arg_atom and not fakedb.cpv_exists(pkg):
-                                       cleanlist.append(pkg)
+                               if arg_atom:
+                                       if not fakedb.cpv_exists(pkg):
+                                               cleanlist.append(pkg)
+                                       elif "--verbose" in myopts:
+                                               show_parents(pkg)
                else:
                        for pkg in vardb.cpv_all():
                                if not fakedb.cpv_exists(pkg):
@@ -5480,9 +5495,16 @@ def action_depclean(settings, trees, ldpath_mtimes,
                        for pkg in vardb.match(atom):
                                if not fakedb.cpv_exists(pkg):
                                        cleanlist.append(pkg)
-               if not cleanlist:
+                               elif "--verbose" in myopts:
+                                       show_parents(pkg)
+
+       if myfiles and not cleanlist:
+               portage.writemsg_stdout(
+                       ">>> No packages selected for removal by %s\n" % action)
+               if "--verbose" not in myopts:
                        portage.writemsg_stdout(
-                               ">>> No packages selected for removal by %s\n" % action)
+                               ">>> To see reverse dependencies, use %s\n" % \
+                                       good("--verbose"))
 
        if len(cleanlist):
                unmerge(settings, myopts, trees[settings["ROOT"]]["vartree"],